feat(investment): Interest Entry screen with coupon and provision schedule

Replace the dummy interest calculation tab with the real Interest Entry:
pick Type / Script / Deal No and Retrieve the holding's schedule from
the backend - every half-yearly coupon and every 31 Mar / 30 Sep closing
provision up to maturity, with days (30/360), gross interest, amount
already booked, net income and the Dr/Cr entry per line. Display only;
nothing is posted to GL yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/investment/bond-investment/bond-investment.component.html

@@ -176,8 +176,9 @@
   <!-- ===================== 01 PURCHASE ENTRY ===================== -->
   @if (activeTab === 'purchase') {
     <div class="pg-card">
+      <!-- 1. Deal details — the only fields the dealer has to fill -->
       <div class="pos-section-label">
-        Investment - Govt.Security/Bond Entry ({{ instrumentLabel(purchaseForm.bondType) }})
+        Purchase Entry — {{ instrumentLabel(purchaseForm.bondType) }} (fields marked * are mandatory)
       </div>
       <div class="inv-form-grid">
         <label class="inv-form-field">
@@ -188,17 +189,6 @@
             }
           </select>
         </label>
-        <label class="inv-form-field"
-          ><span>Deal No</span><input type="text" [(ngModel)]="purchaseForm.dealNo" readonly
-        /></label>
-        <label class="inv-form-field"
-          ><span>* Deal Date</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.dealDate"></mifosx-date-ddmmyyyy
-        ></label>
-        <label class="inv-form-field"
-          ><span>* Deal Time (24 hr, HH:mm:ss)</span
-          ><input type="text" [(ngModel)]="purchaseForm.dealTime" placeholder="HH:mm:ss"
-        /></label>
-        <label class="inv-form-field"><span>* ISIN</span><input type="text" [(ngModel)]="purchaseForm.isin" /></label>
         <label class="inv-form-field">
           <span>* Script Code</span>
           <select [(ngModel)]="purchaseForm.scriptCode" (ngModelChange)="onScriptChange()">
@@ -208,167 +198,46 @@
             }
           </select>
         </label>
-        <label class="inv-form-field"
-          ><span>* Cert No</span><input type="text" [(ngModel)]="purchaseForm.certNo"
-        /></label>
         <label class="inv-form-field">
-          <span>Settlement Type</span>
+          <span>* Party Code</span>
+          <select [(ngModel)]="purchaseForm.partyCode">
+            <option value="">-- Select --</option>
+            @for (p of activePartyOptions; track p.partyCode) {
+              <option [value]="p.partyCode">{{ p.partyCode }} — {{ p.partyName }}</option>
+            }
+          </select>
+        </label>
+        <label class="inv-form-field"
+          ><span>* Deal Date</span
+          ><mifosx-date-ddmmyyyy
+            [(ngModel)]="purchaseForm.dealDate"
+            (ngModelChange)="onDealDateChange()"
+          ></mifosx-date-ddmmyyyy
+        ></label>
+        <label class="inv-form-field">
+          <span>* Settlement Type</span>
           <select [(ngModel)]="purchaseForm.settlementType">
             <option value="T+0">T+0</option>
             <option value="T+1">T+1</option>
             <option value="T+2">T+2</option>
           </select>
         </label>
-        <label class="inv-form-field"
-          ><span>Settlement Dt</span
-          ><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.settlementDt"></mifosx-date-ddmmyyyy
-        ></label>
-        <label class="inv-form-field">
-          <span>* Party Code</span>
-          <select [(ngModel)]="purchaseForm.partyCode">
-            <option value="">-- Select --</option>
-            @for (p of partyOptions; track p.partyCode) {
-              <option [value]="p.partyName">{{ p.partyName }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field">
-          <span>Sub Type</span>
-          <select [(ngModel)]="purchaseForm.subType">
-            @for (s of subTypeOptions; track s.subTypeCode + s.subTypeName) {
-              <option [value]="s.subTypeName">{{ s.subTypeName }}</option>
-            }
-          </select>
-        </label>
-
         @if (isMutualFund) {
-          <label class="inv-form-field">
-            <span>* Product Name</span>
-            <select [(ngModel)]="purchaseForm.productName">
-              <option value="">-- Select --</option>
-              @for (p of mfProductOptions; track p.productCode) {
-                <option [value]="p.productName">{{ p.productName }}</option>
-              }
-            </select>
-          </label>
           <label class="inv-form-field"
-            ><span>Holding Days</span><input type="number" [(ngModel)]="purchaseForm.holdingDays" min="0"
+            ><span>* Consider Amt (₹)</span><input type="number" [(ngModel)]="purchaseForm.considerAmt" min="0"
           /></label>
           <label class="inv-form-field"
-            ><span>* Consider Amt</span><input type="number" [(ngModel)]="purchaseForm.considerAmt" min="0"
-          /></label>
-          <label class="inv-form-field"
-            ><span>Trade Amt</span><input type="number" [(ngModel)]="purchaseForm.tradeAmt" min="0"
-          /></label>
-          <label class="inv-form-field"
-            ><span>NAV</span><input type="number" [(ngModel)]="purchaseForm.nav" min="0" step="0.0001"
-          /></label>
-          <label class="inv-form-field"
-            ><span>Stamp Duty</span><input type="number" [(ngModel)]="purchaseForm.stampDuty" min="0"
-          /></label>
-          <label class="inv-form-field"
-            ><span>StampDuty A/c</span><input type="text" [(ngModel)]="purchaseForm.stampDutyAc"
+            ><span>* NAV</span><input type="number" [(ngModel)]="purchaseForm.nav" min="0" step="0.0001"
           /></label>
         } @else {
           <label class="inv-form-field"
-            ><span>Face Value</span><input type="number" [(ngModel)]="purchaseForm.faceValue" min="0"
+            ><span>* Face Value (₹)</span><input type="number" [(ngModel)]="purchaseForm.faceValue" min="0"
           /></label>
           <label class="inv-form-field"
-            ><span>Purchase Rate (per 100)</span
+            ><span>* Purchase Rate (per ₹100)</span
             ><input type="number" [(ngModel)]="purchaseForm.purchaseRate" min="0" step="0.0001"
           /></label>
-          <label class="inv-form-field"
-            ><span>Unit Val</span><input type="text" [value]="purchaseUnitVal" readonly
-          /></label>
-          <label class="inv-form-field"
-            ><span>Book Value</span><input type="text" [value]="purchaseBookValue | number: '1.2-2'" readonly
-          /></label>
-          <label class="inv-form-field"
-            ><span>Premium Amt.</span><input type="number" [(ngModel)]="purchaseForm.premiumAmt"
-          /></label>
         }
-        <label class="inv-form-field"
-          ><span>* No Unit</span><input type="text" [value]="purchaseUnits" readonly
-        /></label>
-        <label class="inv-form-field"
-          ><span>* CR. To A/c</span><input type="text" [(ngModel)]="purchaseForm.crToAc"
-        /></label>
-        <label class="inv-form-field"
-          ><span>TBill GL.A/C.</span><input type="text" [(ngModel)]="purchaseForm.tbillGlAc"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Brokerage</span><input type="number" [(ngModel)]="purchaseForm.brokerage" min="0"
-        /></label>
-        <label class="inv-form-field">
-          <span>Broker Nm.</span>
-          <select [(ngModel)]="purchaseForm.brokerName">
-            <option value="">-- Select --</option>
-            @for (b of brokerOptions; track b.brokerCode) {
-              <option [value]="b.brokerCode">{{ b.brokerCode }} — {{ b.brokerName }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field"
-          ><span>Trade No.</span><input type="text" [(ngModel)]="purchaseForm.tradeNo"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Order No.</span><input type="text" [(ngModel)]="purchaseForm.orderNo"
-        /></label>
-        <label class="inv-form-field">
-          <span>Recomm. Authority</span>
-          <select [(ngModel)]="purchaseForm.recommAuthority">
-            <option value="">-- Select --</option>
-            @for (a of authorityOptions; track a) {
-              <option [value]="a">{{ a }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field">
-          <span>Sanction Authority</span>
-          <select [(ngModel)]="purchaseForm.sanctionAuthority">
-            <option value="">-- Select --</option>
-            @for (a of authorityOptions; track a) {
-              <option [value]="a">{{ a }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field"
-          ><span>* Issue Date</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.issueDate"></mifosx-date-ddmmyyyy
-        ></label>
-        <label class="inv-form-field"
-          ><span>Period(Year)</span><input type="number" [(ngModel)]="purchaseForm.periodYear" min="0"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Period(Month)</span><input type="number" [(ngModel)]="purchaseForm.periodMonth" min="0" max="11"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Period(Days)</span><input type="number" [(ngModel)]="purchaseForm.periodDays" min="0"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Desc Inv</span><input type="text" [(ngModel)]="purchaseForm.descInv"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Folio No</span><input type="text" [(ngModel)]="purchaseForm.folioNo"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Call Option</span><input type="text" [(ngModel)]="purchaseForm.callOption"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Meet Dt</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.meetDt"></mifosx-date-ddmmyyyy
-        ></label>
-        <label class="inv-form-field"
-          ><span>Reso No</span><input type="text" [(ngModel)]="purchaseForm.resoNo"
-        /></label>
-        <label class="inv-form-field"
-          ><span>From Dist</span><input type="text" [(ngModel)]="purchaseForm.fromDist"
-        /></label>
-        <label class="inv-form-field"
-          ><span>To Dist</span><input type="text" [(ngModel)]="purchaseForm.toDist"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Redum/Mat Dt</span
-          ><input type="text" [(ngModel)]="purchaseForm.redumMatDt" placeholder="DD-MM-YYYY (blank = use period)"
-        /></label>
         <label class="inv-form-field">
           <span>* Category</span>
           <select [(ngModel)]="purchaseForm.category">
@@ -380,32 +249,211 @@
         </label>
         @if (!isMutualFund) {
           <label class="inv-form-field"
-            ><span>Int Rate</span><input type="number" [(ngModel)]="purchaseForm.intRate" min="0" step="0.01"
+            ><span>* Last Interest Date</span
+            ><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.lastIntDt"></mifosx-date-ddmmyyyy
+          ></label>
+        }
+        <label class="inv-form-field">
+          <span>* CR. To A/c (Paid From)</span>
+          <select [(ngModel)]="purchaseForm.crToAc">
+            @for (g of settlementBankOptions; track g.glCode) {
+              <option [value]="g.glCode">{{ g.glCode }} — {{ g.glName }}</option>
+            }
+          </select>
+        </label>
+      </div>
+
+      <!-- 2. Calculated — filled by the system, read-only -->
+      <div class="pos-section-label">Calculated by System</div>
+      <div class="inv-form-grid">
+        <label class="inv-form-field"
+          ><span>Deal No</span><input type="text" [value]="purchaseForm.dealNo" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Cert No</span><input type="text" [value]="purchaseForm.certNo" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Settlement Date</span><input type="text" [value]="purchaseSettlementDate" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>ISIN</span><input type="text" [value]="purchaseForm.isin || '—'" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Sub Type</span><input type="text" [value]="purchaseForm.subType || '—'" readonly
+        /></label>
+        @if (!isMutualFund) {
+          <label class="inv-form-field"
+            ><span>Int Rate %</span><input type="text" [value]="purchaseForm.intRate ?? '—'" readonly
           /></label>
           <label class="inv-form-field"
-            ><span>YTM (computed)</span><input type="text" [value]="purchaseYtm" readonly
+            ><span>Issue Date</span><input type="text" [value]="purchaseForm.issueDate || '—'" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Maturity Date</span><input type="text" [value]="purchaseMaturityDate || '—'" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Period (Y / M / D)</span
+            ><input
+              type="text"
+              [value]="purchaseForm.periodYear + ' / ' + purchaseForm.periodMonth + ' / ' + purchaseForm.periodDays"
+              readonly
+          /></label>
+        }
+        <label class="inv-form-field"
+          ><span>No. of Units</span><input type="text" [value]="purchaseUnits | number: '1.0-4'" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Book Value</span><input type="text" [value]="'₹' + (purchaseBookValue | number: '1.2-2')" readonly
+        /></label>
+        @if (!isMutualFund) {
+          <label class="inv-form-field"
+            ><span>Premium (+) / Discount (−)</span
+            ><input type="text" [value]="'₹' + (purchasePremiumDiscount | number: '1.0-0')" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Accrued Interest ({{ purchaseAccruedDays }} days)</span
+            ><input type="text" [value]="'₹' + (purchaseAccruedInterest | number: '1.2-2')" readonly
+          /></label>
+          <label class="inv-form-field"><span>YTM %</span><input type="text" [value]="purchaseYtm" readonly /></label>
+        }
+        <label class="inv-form-field"
+          ><span>Total Settlement Amount</span
+          ><input type="text" [value]="'₹' + (purchaseSettlementAmount | number: '1.2-2')" readonly
+        /></label>
+      </div>
+
+      <!-- 3. Accounting preview -->
+      <div class="pos-section-label">Accounting Preview (posted after checker approval)</div>
+      @if (purchaseAccountingPreview.length) {
+        <table class="pg-table">
+          <thead>
+            <tr>
+              <th>Dr / Cr</th>
+              <th>GL Code</th>
+              <th>GL Name</th>
+              <th class="num">Amount</th>
+            </tr>
+          </thead>
+          <tbody>
+            @for (l of purchaseAccountingPreview; track l.side + l.glCode) {
+              <tr>
+                <td>{{ l.side }}</td>
+                <td>{{ l.glCode }}</td>
+                <td>{{ l.glName || '—' }}</td>
+                <td class="num">₹{{ l.amount | number: '1.2-2' }}</td>
+              </tr>
+            }
+          </tbody>
+        </table>
+      } @else {
+        <p class="pg-sub">Select a script, enter the amount and CR. To A/c to see the entry.</p>
+      }
+
+      <!-- 4. More details — optional, collapsed by default -->
+      <div class="inv-form-actions">
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="showMoreDetails = !showMoreDetails">
+          {{ showMoreDetails ? '▾ Hide More Details' : '▸ More Details (optional)' }}
+        </button>
+      </div>
+      @if (showMoreDetails) {
+        <div class="pos-section-label">More Details (optional)</div>
+        <div class="inv-form-grid">
+          <label class="inv-form-field"
+            ><span>Deal Time (HH:mm:ss)</span
+            ><input type="text" [(ngModel)]="purchaseForm.dealTime" placeholder="HH:mm:ss"
           /></label>
           <label class="inv-form-field">
-            <span>Int Type</span>
-            <select [(ngModel)]="purchaseForm.intType">
-              @for (i of intTypeOptions; track i.value) {
-                <option [value]="i.value">{{ i.label }}</option>
+            <span>Sub Type</span>
+            <select [(ngModel)]="purchaseForm.subType">
+              @for (s of subTypeOptions; track s.subTypeCode + s.subTypeName) {
+                <option [value]="s.subTypeName">{{ s.subTypeName }}</option>
+              }
+            </select>
+          </label>
+          @if (isMutualFund) {
+            <label class="inv-form-field"
+              ><span>Trade Amt</span><input type="number" [(ngModel)]="purchaseForm.tradeAmt" min="0"
+            /></label>
+            <label class="inv-form-field"
+              ><span>Stamp Duty</span><input type="number" [(ngModel)]="purchaseForm.stampDuty" min="0"
+            /></label>
+            <label class="inv-form-field"
+              ><span>Stamp Duty A/c</span><input type="text" [(ngModel)]="purchaseForm.stampDutyAc"
+            /></label>
+            <label class="inv-form-field"
+              ><span>Holding Days</span><input type="number" [(ngModel)]="purchaseForm.holdingDays" min="0"
+            /></label>
+          } @else {
+            <label class="inv-form-field">
+              <span>Int Type</span>
+              <select [(ngModel)]="purchaseForm.intType">
+                @for (i of intTypeOptions; track i.value) {
+                  <option [value]="i.value">{{ i.label }}</option>
+                }
+              </select>
+            </label>
+            <label class="inv-form-field">
+              <span>Bond Rating</span>
+              <select [(ngModel)]="purchaseForm.bondRating">
+                @for (r of bondRatingOptions; track r) {
+                  <option [value]="r">{{ r }}</option>
+                }
+              </select>
+            </label>
+            <label class="inv-form-field">
+              <span>SGL with Bank</span>
+              <select [(ngModel)]="purchaseForm.sglWithBank">
+                <option value="">-- Select --</option>
+                @for (s of sglBankOptions; track s.sglCode) {
+                  <option [value]="s.bankName">{{ s.bankName }} — {{ s.branch }}</option>
+                }
+              </select>
+            </label>
+            <label class="inv-form-field"
+              ><span>TBill GL A/c</span><input type="text" [(ngModel)]="purchaseForm.tbillGlAc"
+            /></label>
+          }
+          <label class="inv-form-field"
+            ><span>Brokerage (₹)</span><input type="number" [(ngModel)]="purchaseForm.brokerage" min="0"
+          /></label>
+          <label class="inv-form-field">
+            <span>Broker</span>
+            <select [(ngModel)]="purchaseForm.brokerName">
+              <option value="">-- Select --</option>
+              @for (b of brokerOptions; track b.brokerCode) {
+                <option [value]="b.brokerCode">{{ b.brokerCode }} — {{ b.brokerName }}</option>
               }
             </select>
           </label>
           <label class="inv-form-field"
-            ><span>Int Date</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.intDate"></mifosx-date-ddmmyyyy
-          ></label>
-          <label class="inv-form-field"
-            ><span>* Last Int.dt</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.lastIntDt"></mifosx-date-ddmmyyyy
-          ></label>
-          <label class="inv-form-field"
-            ><span>Accrued Interest (computed)</span
-            ><input type="text" [value]="purchaseAccruedInterest | number: '1.2-2'" readonly
+            ><span>Trade No.</span><input type="text" [(ngModel)]="purchaseForm.tradeNo"
           /></label>
           <label class="inv-form-field"
-            ><span>Settlement Amt of Pur. (computed)</span
-            ><input type="text" [value]="purchaseSettlementAmount | number: '1.4-4'" readonly
+            ><span>Order No.</span><input type="text" [(ngModel)]="purchaseForm.orderNo"
+          /></label>
+          <label class="inv-form-field">
+            <span>Recomm. Authority</span>
+            <select [(ngModel)]="purchaseForm.recommAuthority">
+              <option value="">-- Select --</option>
+              @for (a of authorityOptions; track a) {
+                <option [value]="a">{{ a }}</option>
+              }
+            </select>
+          </label>
+          <label class="inv-form-field">
+            <span>Sanction Authority</span>
+            <select [(ngModel)]="purchaseForm.sanctionAuthority">
+              <option value="">-- Select --</option>
+              @for (a of authorityOptions; track a) {
+                <option [value]="a">{{ a }}</option>
+              }
+            </select>
+          </label>
+          <label class="inv-form-field"
+            ><span>Meet Date</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.meetDt"></mifosx-date-ddmmyyyy
+          ></label>
+          <label class="inv-form-field"
+            ><span>Reso No</span><input type="text" [(ngModel)]="purchaseForm.resoNo"
           /></label>
           <label class="inv-form-field">
             <span>Deal Type</span>
@@ -423,6 +471,80 @@
               }
             </select>
           </label>
+          <label class="inv-form-field">
+            <span>Payment Mode</span>
+            <select [(ngModel)]="purchaseForm.paymentMode">
+              <option value="">-- Select --</option>
+              @for (p of paymentModeOptions; track p) {
+                <option [value]="p">{{ p }}</option>
+              }
+            </select>
+          </label>
+          <label class="inv-form-field">
+            <span>Delivery Mode</span>
+            <select [(ngModel)]="purchaseForm.deliveryMode">
+              <option value="">-- Select --</option>
+              @for (d of deliveryModeOptions; track d) {
+                <option [value]="d">{{ d }}</option>
+              }
+            </select>
+          </label>
+          <label class="inv-form-field">
+            <span>LIEN</span>
+            <select [(ngModel)]="purchaseForm.lien">
+              <option value="NO">NO</option>
+              <option value="YES">YES</option>
+            </select>
+          </label>
+          @if (purchaseForm.lien === 'YES') {
+            <label class="inv-form-field"
+              ><span>LIEN Amount</span><input type="number" [(ngModel)]="purchaseForm.lienAmount"
+            /></label>
+            <label class="inv-form-field">
+              <span>LIEN Reason</span>
+              <select [(ngModel)]="purchaseForm.lienReason">
+                <option value="">-- Select --</option>
+                @for (l of lienReasonOptions; track l.reasonCode) {
+                  <option [value]="l.reasonDescription">{{ l.reasonDescription }}</option>
+                }
+              </select>
+            </label>
+          }
+          <label class="inv-form-field"
+            ><span>Folio No</span><input type="text" [(ngModel)]="purchaseForm.folioNo"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Call Option</span><input type="text" [(ngModel)]="purchaseForm.callOption"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Register Address</span><input type="text" [(ngModel)]="purchaseForm.registerAdd"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Register City</span><input type="text" [(ngModel)]="purchaseForm.regiCity"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Register Pin</span><input type="text" [(ngModel)]="purchaseForm.regiPin"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Issue Date (override)</span
+            ><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.issueDate"></mifosx-date-ddmmyyyy
+          ></label>
+          <label class="inv-form-field"
+            ><span>Redum / Mat Date (override)</span
+            ><input type="text" [(ngModel)]="purchaseForm.redumMatDt" placeholder="DD-MM-YYYY"
+          /></label>
+          <label class="inv-form-field"
+            ><span>Int Date</span><mifosx-date-ddmmyyyy [(ngModel)]="purchaseForm.intDate"></mifosx-date-ddmmyyyy
+          ></label>
+          <label class="inv-form-field"
+            ><span>Desc Inv</span><input type="text" [(ngModel)]="purchaseForm.descInv"
+          /></label>
+          <label class="inv-form-field"
+            ><span>From Dist</span><input type="text" [(ngModel)]="purchaseForm.fromDist"
+          /></label>
+          <label class="inv-form-field"
+            ><span>To Dist</span><input type="text" [(ngModel)]="purchaseForm.toDist"
+          /></label>
           <label class="inv-form-field">
             <span>Mark CBLO</span>
             <select [(ngModel)]="purchaseForm.markCblo">
@@ -433,14 +555,6 @@
           <label class="inv-form-field"
             ><span>Amortize Amt.</span><input type="number" [(ngModel)]="purchaseForm.amortizeAmt"
           /></label>
-          <label class="inv-form-field">
-            <span>Bond Rating</span>
-            <select [(ngModel)]="purchaseForm.bondRating">
-              @for (r of bondRatingOptions; track r) {
-                <option [value]="r">{{ r }}</option>
-              }
-            </select>
-          </label>
           <label class="inv-form-field">
             <span>Corp. Bond</span>
             <select [(ngModel)]="purchaseForm.corpBond">
@@ -448,76 +562,19 @@
               <option value="YES">YES</option>
             </select>
           </label>
-          <label class="inv-form-field">
-            <span>SGL with Bank</span>
-            <select [(ngModel)]="purchaseForm.sglWithBank">
-              <option value="">-- Select --</option>
-              @for (s of sglBankOptions; track s.sglCode) {
-                <option [value]="s.bankName">{{ s.bankName }} — {{ s.branch }}</option>
-              }
-            </select>
-          </label>
           <label class="inv-form-field"
-            ><span>Register Add</span><input type="text" [(ngModel)]="purchaseForm.registerAdd"
+            ><span>Remarks</span><input type="text" [(ngModel)]="purchaseForm.remarks"
           /></label>
           <label class="inv-form-field"
-            ><span>Regi City</span><input type="text" [(ngModel)]="purchaseForm.regiCity"
+            ><span>Description</span><input type="text" [(ngModel)]="purchaseForm.description"
           /></label>
-          <label class="inv-form-field"
-            ><span>Regi Pin</span><input type="text" [(ngModel)]="purchaseForm.regiPin"
-          /></label>
-        }
-        <label class="inv-form-field">
-          <span>LIEN</span>
-          <select [(ngModel)]="purchaseForm.lien">
-            <option value="NO">NO</option>
-            <option value="YES">YES</option>
-          </select>
-        </label>
-        @if (purchaseForm.lien === 'YES') {
-          <label class="inv-form-field"
-            ><span>LIEN Amount</span><input type="number" [(ngModel)]="purchaseForm.lienAmount"
-          /></label>
-          <label class="inv-form-field">
-            <span>LIEN Reason</span>
-            <select [(ngModel)]="purchaseForm.lienReason">
-              <option value="">-- Select --</option>
-              @for (l of lienReasonOptions; track l.reasonCode) {
-                <option [value]="l.reasonDescription">{{ l.reasonDescription }}</option>
-              }
-            </select>
-          </label>
-        }
-        <label class="inv-form-field">
-          <span>Payment Mode</span>
-          <select [(ngModel)]="purchaseForm.paymentMode">
-            <option value="">--Select--</option>
-            @for (p of paymentModeOptions; track p) {
-              <option [value]="p">{{ p }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field">
-          <span>Delivery Mode</span>
-          <select [(ngModel)]="purchaseForm.deliveryMode">
-            <option value="">--Select--</option>
-            @for (d of deliveryModeOptions; track d) {
-              <option [value]="d">{{ d }}</option>
-            }
-          </select>
-        </label>
-        <label class="inv-form-field"
-          ><span>Remarks</span><input type="text" [(ngModel)]="purchaseForm.remarks"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Description</span><input type="text" [(ngModel)]="purchaseForm.description"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Maturity / Redemption Value (computed)</span
-          ><input type="text" [value]="'₹' + (purchaseMaturityAmount | number: '1.2-2')" readonly
-        /></label>
-      </div>
+        </div>
+      }
+
       <div class="inv-form-actions">
+        <label class="inv-form-field"
+          ><span>Retrieve Cert No</span><input type="text" placeholder="e.g. 30" [(ngModel)]="retrieveCertNo"
+        /></label>
         <button type="button" class="pg-btn pg-btn--primary" (click)="savePurchase()">Save</button>
         <button type="button" class="pg-btn pg-btn--ghost" (click)="retrievePurchase()">Retrieve</button>
         <button type="button" class="pg-btn pg-btn--ghost" (click)="dropPurchase()">Drop</button>
@@ -569,20 +626,14 @@
     </div>
   }
 
-  <!-- ===================== 03 INTEREST ENTRY / CALCULATION ===================== -->
+  <!-- ===================== 03 INTEREST ENTRY ===================== -->
   @if (activeTab === 'interest') {
     <div class="pg-card">
-      <div class="pos-section-label">Investment - Govt./Bond Interest calculation</div>
+      <div class="pos-section-label">Interest Entry — coupon and 31 Mar / 30 Sep provision schedule</div>
       <div class="inv-form-grid">
-        <label class="inv-form-field"
-          ><span>From Date</span><mifosx-date-ddmmyyyy [(ngModel)]="intCalcFromDate"></mifosx-date-ddmmyyyy
-        ></label>
-        <label class="inv-form-field"
-          ><span>To Date</span><mifosx-date-ddmmyyyy [(ngModel)]="intCalcToDate"></mifosx-date-ddmmyyyy
-        ></label>
         <label class="inv-form-field">
           <span>Type</span>
-          <select [(ngModel)]="intCalcType" (ngModelChange)="onIntCalcTypeChange()">
+          <select [(ngModel)]="intType" (ngModelChange)="onIntFilterChange()">
             <option value="">-- All Types --</option>
             @for (o of bondTypeOptions; track o.value) {
               <option [value]="o.value">{{ o.label }}</option>
@@ -591,67 +642,149 @@
         </label>
         <label class="inv-form-field">
           <span>Script</span>
-          <select [(ngModel)]="intCalcScript">
+          <select [(ngModel)]="intScript" (ngModelChange)="onIntFilterChange()">
             <option value="">-- All Scripts --</option>
-            @for (s of scriptOptions; track s.scriptCode) {
+            @for (s of intScriptOptions; track s.scriptCode) {
               <option [value]="s.scriptCode">{{ s.scriptCode }} — {{ s.scriptName }}</option>
             }
           </select>
         </label>
-        <label class="inv-form-field"><span>Deal No</span><input type="text" [(ngModel)]="intCalcDealNo" /></label>
-        <label class="inv-form-field"
-          ><span>ALL</span><input type="checkbox" [(ngModel)]="intCalcAll" style="height: 18px; width: 18px"
-        /></label>
         <label class="inv-form-field">
-          <span>Post To (Interest Income GL)</span>
-          <select [(ngModel)]="intCalcGlCode">
-            @for (g of interestIncomeGlOptions; track g.glCode) {
-              <option [value]="g.glCode">{{ g.glCode }} — {{ g.glName }}</option>
+          <span>* Deal No</span>
+          <select [(ngModel)]="intPurchaseId" (ngModelChange)="intSchedule = null">
+            <option [ngValue]="null">-- Select --</option>
+            @for (h of intDealOptions; track h.id) {
+              <option [ngValue]="h.id">{{ h.dealNo }} — {{ h.scriptCode }} (Cert {{ h.certNo }})</option>
             }
           </select>
         </label>
+        <label class="inv-form-field"
+          ><span>As On Date</span><mifosx-date-ddmmyyyy [(ngModel)]="intAsOnDate"></mifosx-date-ddmmyyyy
+        ></label>
       </div>
       <div class="inv-form-actions">
-        <button type="button" class="pg-btn pg-btn--primary" (click)="processInterest()">Process</button>
+        <button
+          type="button"
+          class="pg-btn pg-btn--primary"
+          [disabled]="intLoading"
+          (click)="retrieveInterestSchedule()"
+        >
+          {{ intLoading ? 'Retrieving…' : 'Retrieve' }}
+        </button>
         <button type="button" class="pg-btn pg-btn--ghost" (click)="setTab('holdings')">Exit</button>
       </div>
-      @if (intCalcExcludedNpi.length > 0) {
+
+      @if (intSchedule; as sc) {
+        <div class="pos-section-label">Purchase Details</div>
+        <div class="inv-form-grid">
+          <label class="inv-form-field"
+            ><span>Deal No / Cert No</span><input type="text" [value]="sc.dealNo + ' / ' + sc.certNo" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Script</span><input type="text" [value]="sc.scriptCode + ' — ' + sc.scriptDesc" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Face Value Held</span><input type="text" [value]="'₹' + (sc.faceValue | number: '1.2-2')" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Interest Rate</span><input type="text" [value]="sc.intRate + '%'" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Coupon per Half-Year</span
+            ><input type="text" [value]="'₹' + (sc.couponPerHalfYear | number: '1.2-2')" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Deal Date</span><input type="text" [value]="sc.dealDate" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Last Interest Date</span><input type="text" [value]="sc.lastIntDate" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Maturity Date</span><input type="text" [value]="sc.maturityDate" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Accrued Interest Paid at Purchase</span
+            ><input type="text" [value]="'₹' + (sc.purchasedAccruedInterest | number: '1.2-2')" readonly
+          /></label>
+          <label class="inv-form-field"
+            ><span>Book Value</span><input type="text" [value]="'₹' + (sc.bookValue | number: '1.2-2')" readonly
+          /></label>
+        </div>
+
+        <div class="pos-section-label">
+          Interest Schedule ({{ sc.rows.length }} lines) — due up to {{ sc.asOnDate }}: ₹{{
+            intDueTotal | number: '1.2-2'
+          }}
+        </div>
+        <p class="pg-sub" style="padding: 0 16px">
+          Days are 30/360. A provision books the interest earned since the last coupon; the coupon then clears what is
+          already booked. Display only — nothing is posted to GL yet.
+        </p>
+        <table class="pg-table">
+          <thead>
+            <tr>
+              <th>Type</th>
+              <th>Int Date</th>
+              <th>From</th>
+              <th>To</th>
+              <th class="num">Days</th>
+              <th class="num">Int %</th>
+              <th class="num">Gross Interest</th>
+              <th class="num">Already Booked</th>
+              <th class="num col-in">Amount</th>
+              <th>Accounting</th>
+            </tr>
+          </thead>
+          <tbody>
+            @for (r of sc.rows; track r.intDate) {
+              <tr [style.opacity]="r.due ? 1 : 0.6">
+                <td>
+                  <span class="pg-chip">{{ r.type === 'COUPON' ? 'Coupon' : 'Provision' }}</span>
+                  @if (r.due) {
+                    <span class="pg-chip">Due</span>
+                  }
+                </td>
+                <td>{{ r.intDate }}</td>
+                <td>{{ r.fromDate }}</td>
+                <td>{{ r.toDate }}</td>
+                <td class="num">{{ r.days }}</td>
+                <td class="num">{{ sc.intRate }}</td>
+                <td class="num">₹{{ r.grossInterest | number: '1.2-2' }}</td>
+                <td class="num">₹{{ r.alreadyBooked | number: '1.2-2' }}</td>
+                <td class="num col-in">₹{{ r.amount | number: '1.2-2' }}</td>
+                <td style="white-space: nowrap; font-size: 12px">
+                  @if (r.type === 'COUPON') {
+                    <div>Dr Bank ₹{{ r.grossInterest | number: '1.0-0' }}</div>
+                    @if (r.alreadyBooked > 0) {
+                      <div>
+                        Cr {{ interestReceivableGl.glCode }} Int. Receivable ₹{{ r.alreadyBooked | number: '1.0-0' }}
+                      </div>
+                    }
+                    <div>Cr {{ sc.interestGlCode }} Int. Income ₹{{ r.amount | number: '1.0-0' }}</div>
+                  } @else {
+                    <div>Dr {{ interestReceivableGl.glCode }} Int. Receivable ₹{{ r.amount | number: '1.0-0' }}</div>
+                    <div>Cr {{ sc.interestGlCode }} Int. Income ₹{{ r.amount | number: '1.0-0' }}</div>
+                  }
+                </td>
+              </tr>
+            } @empty {
+              <tr>
+                <td colspan="10" class="pg-empty">
+                  No interest lines — check the rate, last interest date and maturity date.
+                </td>
+              </tr>
+            }
+          </tbody>
+        </table>
+        <p class="pg-sub" style="padding: 8px 16px 12px">
+          Interest income GL: {{ sc.interestGlCode }} — {{ sc.interestGlName }}. Posting to GL will be enabled after
+          approval.
+        </p>
+      } @else {
         <p class="pg-sub" style="padding: 0 16px 12px">
-          {{ intCalcExcludedNpi.length }} holding(s) excluded — classified Non-Performing, interest is not posted on
-          accrual basis (collectible on cash basis only, via Interest Receive in the Investment Interest module).
+          Select a Deal No and press Retrieve to see its interest schedule.
         </p>
       }
-      <div class="pos-section-label">Holdings matching the filter ({{ intCalcTargets.length }})</div>
-      <table class="pg-table">
-        <thead>
-          <tr>
-            <th>Cert No</th>
-            <th>Script</th>
-            <th>Type</th>
-            <th class="num">Rate</th>
-            <th>Frequency</th>
-            <th class="num col-in">Interest to Post</th>
-          </tr>
-        </thead>
-        <tbody>
-          @for (h of intCalcTargets; track h.certNo) {
-            <tr>
-              <td>
-                <span class="pg-chip">{{ h.certNo }}</span>
-              </td>
-              <td>{{ h.scriptName }}</td>
-              <td>{{ instrumentLabel(h.instrumentType) }}</td>
-              <td class="num">{{ h.interestRate }}%</td>
-              <td>{{ h.interestFreq }}</td>
-              <td class="num col-in">₹{{ interestAccrued(h) | number: '1.2-2' }}</td>
-            </tr>
-          } @empty {
-            <tr>
-              <td colspan="6" class="pg-empty">No holdings match the selected filters.</td>
-            </tr>
-          }
-        </tbody>
-      </table>
     </div>
   }
 

src/app/investment/bond-investment/bond-investment.component.ts

@@ -6,16 +6,11 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-import { Component } from '@angular/core';
+import { Component, OnInit, inject } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { FormsModule } from '@angular/forms';
 import { DateDdmmyyyyPickerComponent } from '../date-ddmmyyyy-picker/date-ddmmyyyy-picker.component';
 import {
-  GOVT_SECURITY_HOLDINGS,
-  NON_SLR_HOLDINGS,
-  BOND_HOLDINGS,
-  MUTUAL_FUND_HOLDINGS,
-  ALL_TXNS,
   SCRIPT_MASTER,
   PARTY_MASTER,
   SUBTYPE_MASTER,
@@ -31,16 +26,20 @@ import {
   BOND_RATING_OPTIONS,
   INT_TYPE_OPTIONS,
   AUTHORITY_OPTIONS,
-  INTEREST_INCOME_GL_MASTER,
-  INTEREST_INCOME_GL_BY_TYPE,
+  INVESTMENT_GL_BY_TYPE,
+  INVESTMENT_GL_LOOKUP,
+  INTEREST_RECEIVABLE_GL,
+  SETTLEMENT_BANK_GL_OPTIONS,
+  periodBetween,
+  parseDDMMYYYY,
+  days360,
+  lastHalfYearlyCouponDate,
   InvestmentHolding,
   InvestmentTxn,
   InstrumentType,
   InterestFreq,
   INSTRUMENT_LABELS,
   accruedInterest,
-  accruedInterestBetween,
-  canAccrueInterest,
   daysToMaturity,
   maturityAmount,
   addPeriod,
@@ -49,6 +48,13 @@ import {
   todayDDMMYYYY
 } from '../investment-data';
 import { exportWorkbook } from '../investment-export';
+import {
+  InvestmentInterestScheduleDto,
+  InvestmentPurchaseDto,
+  InvestmentService,
+  apiErrorMessage,
+  toHolding
+} from '../investment.service';
 
 type BondType = 'GOVT_SECURITY' | 'NON_SLR' | 'BOND' | 'MUTUAL_FUND';
 type BondTab =
@@ -131,6 +137,13 @@ interface BondPurchaseForm {
   stampDutyAc: string;
 }
 
+interface AccountingPreviewLine {
+  side: 'Dr' | 'Cr';
+  glCode: string;
+  glName: string;
+  amount: number;
+}
+
 interface BondSellForm {
   /** Legacy screen has SELL / REDEEM / MUTUAL FUND SELL radio at the top. */
   mode: 'SELL' | 'REDEEM' | 'MUTUAL_FUND_SELL';
@@ -182,23 +195,67 @@ interface BondSellForm {
     DateDdmmyyyyPickerComponent
   ]
 })
-export class BondInvestmentComponent {
+export class BondInvestmentComponent implements OnInit {
+  private readonly investmentService = inject(InvestmentService);
+
+  /** Script and party dropdowns offer the masters saved in the backend. */
+  ngOnInit(): void {
+    this.investmentService.syncSharedMasters().subscribe({
+      error: (err) => this.toast(`Could not load Script / Party masters: ${apiErrorMessage(err)}`)
+    });
+    this.investmentService.getAssetGlAccounts().subscribe({
+      next: (gls) =>
+        (this.glIdByCode = new Map(
+          gls.map((g) => [
+            g.glCode,
+            g.id
+          ])
+        )),
+      error: (err) => this.toast(`Could not load GL accounts: ${apiErrorMessage(err)}`)
+    });
+    this.loadPurchases();
+  }
+
+  /** GL id for a GL code — the purchase API takes ids, the form works with codes. */
+  private glIdByCode = new Map<string, number>();
+
+  /** The Holdings register and transaction log are the purchases saved in the backend. */
+  private loadPurchases(): void {
+    this.investmentService.getPurchases().subscribe({
+      next: (purchases) => {
+        this.holdings = purchases.map(toHolding);
+        this.txns = purchases.map((d) => this.purchaseTxn(d));
+        this.purchaseForm = this.blankPurchaseForm();
+      },
+      error: (err) => this.toast(`Could not load purchases: ${apiErrorMessage(err)}`)
+    });
+  }
+
+  private purchaseTxn(d: InvestmentPurchaseDto): InvestmentTxn {
+    return {
+      certNo: d.certNo,
+      instrumentType: d.bondType,
+      txnType: 'PURCHASE',
+      voucherNo: `INV/PUR/${d.dealNo}`,
+      txnDate: d.dealDate,
+      amount: d.settlementAmount,
+      particulars: `Purchase Deal ${d.dealNo} - ${d.scriptDesc} - ${d.partyName} [${d.category}]`,
+      glCode: d.investmentGlCode,
+      glName: d.investmentGlName
+    };
+  }
+
   activeTab: BondTab = 'holdings';
+  /** Purchase Entry shows only the mandatory fields; the rest sit under "More Details". */
+  showMoreDetails = false;
+  /** Cert No typed in the Retrieve box (Cert No itself is system-generated and read-only). */
+  retrieveCertNo = '';
   bondType: BondType = 'GOVT_SECURITY';
   asOnDate = todayDDMMYYYY();
 
-  holdings: InvestmentHolding[] = [
-    ...GOVT_SECURITY_HOLDINGS,
-    ...NON_SLR_HOLDINGS,
-    ...BOND_HOLDINGS,
-    ...MUTUAL_FUND_HOLDINGS
-  ];
-  txns: InvestmentTxn[] = ALL_TXNS.filter((t) => ([
-        'GOVT_SECURITY',
-        'NON_SLR',
-        'BOND',
-        'MUTUAL_FUND'
-      ] as InstrumentType[]).includes(t.instrumentType));
+  /** Loaded from the backend (saved purchases) in ngOnInit. */
+  holdings: InvestmentHolding[] = [];
+  txns: InvestmentTxn[] = [];
 
   // Master-driven dropdown sources
   readonly scriptOptions = SCRIPT_MASTER;
@@ -224,23 +281,23 @@ export class BondInvestmentComponent {
 
   purchaseForm: BondPurchaseForm = this.blankPurchaseForm();
   sellForm: BondSellForm = this.blankSellForm();
+  readonly settlementBankOptions = SETTLEMENT_BANK_GL_OPTIONS;
 
   // Redemption Entry
   redeemCertNo = '';
   redeemDate = this.asOnDate;
   redeemRemarks = '';
 
-  // Interest Calculation (legacy: From/To Date / Type / Script / Deal No / ALL + Process) —
-  // posts interest accrued strictly within [intCalcFromDate, intCalcToDate], same period-based
-  // basis as the Investment Interest module's Govt./Bond Interest Calculation.
-  intCalcFromDate = addPeriod(this.asOnDate, 0, -3);
-  intCalcToDate = this.asOnDate;
-  intCalcType: BondType | '' = '';
-  intCalcScript = '';
-  intCalcDealNo = '';
-  intCalcAll = false;
-  intCalcGlCode = INTEREST_INCOME_GL_BY_TYPE.GOVT_SECURITY;
-  readonly interestIncomeGlOptions = INTEREST_INCOME_GL_MASTER;
+  // 03 Interest Entry (legacy: Type / Script / Deal No + Retrieve) — the backend works out every
+  // half-yearly coupon and 31 Mar / 30 Sep closing provision of the holding. Display only:
+  // nothing is posted to GL until the posting rules are approved.
+  intType: BondType | '' = '';
+  intScript = '';
+  intPurchaseId: number | null = null;
+  intAsOnDate = this.asOnDate;
+  intSchedule: InvestmentInterestScheduleDto | null = null;
+  intLoading = false;
+  readonly interestReceivableGl = INTEREST_RECEIVABLE_GL;
 
   // Write-off
   writeoffCertNo = '';
@@ -305,20 +362,37 @@ export class BondInvestmentComponent {
     return INSTRUMENT_LABELS[type];
   }
 
+  /** Preview of the deal number the backend will assign: FY prefix (e.g. 202627) + running number. */
   private nextDealNo(): string {
-    return `2026${String(27000039 + this.holdings.length).padStart(9, '0')}`;
+    const d = parseDDMMYYYY(this.asOnDate);
+    const fyStart = d.getMonth() >= 3 ? d.getFullYear() : d.getFullYear() - 1;
+    const prefix = `${fyStart}${String((fyStart + 1) % 100).padStart(2, '0')}`;
+    const nums = (this.holdings ?? [])
+      .map((h) => h.dealNo)
+      .filter((n): n is string => !!n && n.startsWith(prefix))
+      .map((n) => parseInt(n.slice(prefix.length), 10));
+    return `${prefix}${String((nums.length ? Math.max(...nums) : 0) + 1).padStart(6, '0')}`;
+  }
+
+  /** Certificate No is system-generated, as in the existing CBS (greyed there). */
+  /** Preview of the certificate number the backend will assign (running number). */
+  private nextCertNo(): string {
+    const nums = (this.holdings ?? []).map((h) => parseInt(h.certNo, 10)).filter((n) => !isNaN(n));
+    return String((nums.length ? Math.max(...nums) : 0) + 1);
   }
 
   private blankPurchaseForm(): BondPurchaseForm {
     const type = this.bondType ?? 'GOVT_SECURITY';
+    this.showMoreDetails = false;
+    this.retrieveCertNo = '';
     return {
       bondType: type,
       dealNo: this.nextDealNo(),
       dealDate: this.asOnDate,
-      dealTime: '',
+      dealTime: new Date().toTimeString().slice(0, 8),
       isin: '',
       scriptCode: '',
-      certNo: '',
+      certNo: this.nextCertNo(),
       settlementType: 'T+0',
       settlementDt: this.asOnDate,
       faceValue: null,
@@ -326,7 +400,7 @@ export class BondInvestmentComponent {
       partyCode: '',
       subType: type === 'GOVT_SECURITY' ? 'SLR' : type === 'NON_SLR' ? 'NON SLR' : 'CORPORATE BOND',
       tbillGlAc: '',
-      crToAc: '310070',
+      crToAc: SETTLEMENT_BANK_GL_OPTIONS[0]?.glCode ?? '',
       premiumAmt: null,
       brokerage: null,
       brokerName: '',
@@ -463,13 +537,41 @@ export class BondInvestmentComponent {
   }
 
   /** Accrued Interest at purchase — interest earned by the seller since the last coupon date. */
+  /** Interest owed to the seller from the last coupon date up to the deal date, on a 30/360 basis —
+   *  interest is counted to the event date, not the date the money moves (Jitendra Sir). */
   get purchaseAccruedInterest(): number {
     const f = this.purchaseForm;
     if (!f.intRate || !f.lastIntDt || !f.dealDate) {
       return 0;
     }
-    const yrs = Math.max(0, yearsBetween(f.lastIntDt, f.dealDate));
-    return Math.round(this.purchaseBaseAmount * (f.intRate / 100) * yrs);
+    return Math.round((this.purchaseBaseAmount * (f.intRate / 100) * days360(f.lastIntDt, f.dealDate)) / 360);
+  }
+
+  get purchaseAccruedDays(): number {
+    const f = this.purchaseForm;
+    return f.lastIntDt && f.dealDate ? days360(f.lastIntDt, f.dealDate) : 0;
+  }
+
+  /** Premium (+) or discount (−) paid over face value. */
+  get purchasePremiumDiscount(): number {
+    const f = this.purchaseForm;
+    if (this.isMutualFund || !f.faceValue || !f.purchaseRate) {
+      return 0;
+    }
+    return Math.round((f.faceValue * (f.purchaseRate - 100)) / 100);
+  }
+
+  /** Re-suggests the last coupon date when the deal date changes. */
+  onDealDateChange(): void {
+    this.suggestLastIntDate();
+  }
+
+  private suggestLastIntDate(): void {
+    const f = this.purchaseForm;
+    const s = this.purchaseScript;
+    if (!this.isMutualFund && s?.maturityDate && f.dealDate) {
+      f.lastIntDt = lastHalfYearlyCouponDate(s.maturityDate, f.dealDate) || f.lastIntDt;
+    }
   }
 
   /** Settlement Amt of Purchase — book value plus accrued interest payable to the seller. */
@@ -504,69 +606,196 @@ export class BondInvestmentComponent {
     });
   }
 
-  /** Fills ISIN + interest rate when a script is picked, mirroring the legacy form's lookup. */
+  get purchaseScript(): (typeof SCRIPT_MASTER)[number] | undefined {
+    return this.scriptOptions.find((x) => x.scriptCode === this.purchaseForm.scriptCode);
+  }
+
+  /** Picking a script pulls its master details into the deal, as the existing CBS does. */
   onScriptChange(): void {
-    const s = this.scriptOptions.find((x) => x.scriptCode === this.purchaseForm.scriptCode);
-    if (s) {
-      this.purchaseForm.isin = s.isin;
+    const s = this.purchaseScript;
+    if (!s) {
+      return;
     }
+    const f = this.purchaseForm;
+    f.isin = s.isin;
+    if (s.couponRate != null) {
+      f.intRate = s.couponRate;
+    }
+    if (s.issueDate) {
+      f.issueDate = s.issueDate;
+    }
+    if (s.maturityDate) {
+      f.redumMatDt = s.maturityDate;
+      const p = periodBetween(s.issueDate, s.maturityDate);
+      f.periodYear = p.years;
+      f.periodMonth = p.months;
+      f.periodDays = p.days;
+    }
+    if (s.slrType) {
+      f.subType = s.slrType === 'NON_SLR' ? 'NON SLR' : 'SLR';
+    }
+    if (this.isMutualFund) {
+      f.productName = s.scriptName;
+    }
+    this.suggestLastIntDate();
+  }
+
+  /** Settlement Date = Deal Date + T+n days (greyed / auto in the existing CBS). */
+  get purchaseSettlementDate(): string {
+    const f = this.purchaseForm;
+    if (!f.dealDate) {
+      return '';
+    }
+    const n = parseInt(f.settlementType.replace('T+', ''), 10) || 0;
+    return addPeriod(f.dealDate, 0, 0, n);
+  }
+
+  /** Parties offered for a new deal — inactive parties are hidden. */
+  get activePartyOptions(): typeof PARTY_MASTER {
+    return this.partyOptions.filter((p) => p.status !== 'INACTIVE');
+  }
+
+  get purchaseInvestmentGlCode(): string {
+    return this.purchaseScript?.glCode || INVESTMENT_GL_BY_TYPE[this.purchaseForm.bondType];
+  }
+
+  glNameOf(glCode: string): string {
+    return INVESTMENT_GL_LOOKUP.find((g) => g.glCode === glCode)?.glName ?? '';
+  }
+
+  /** The journal entry this purchase will post once the checker approves it. */
+  get purchaseAccountingPreview(): AccountingPreviewLine[] {
+    const book = this.purchaseBookValue;
+    const accrued = this.purchaseAccruedInterest;
+    const total = this.purchaseSettlementAmount;
+    const crGl = this.purchaseForm.crToAc;
+    if (!book || !crGl) {
+      return [];
+    }
+    const invGl = this.purchaseInvestmentGlCode;
+    const lines: AccountingPreviewLine[] = [
+      { side: 'Dr', glCode: invGl, glName: this.glNameOf(invGl), amount: book }];
+    if (accrued > 0) {
+      lines.push({
+        side: 'Dr',
+        glCode: INTEREST_RECEIVABLE_GL.glCode,
+        glName: INTEREST_RECEIVABLE_GL.glName,
+        amount: accrued
+      });
+    }
+    lines.push({ side: 'Cr', glCode: crGl, glName: this.glNameOf(crGl), amount: total });
+    return lines;
   }
 
   savePurchase(): void {
     const f = this.purchaseForm;
-    if (!f.certNo || !this.purchaseBaseAmount || !f.partyCode) {
-      this.toast('Please fill Cert No, Face Value / Consider Amt and Party Code.');
+    const missing: string[] = [];
+    if (!f.scriptCode) missing.push('Script Code');
+    if (!f.partyCode) missing.push('Party Code');
+    if (!f.dealDate) missing.push('Deal Date');
+    if (this.isMutualFund) {
+      if (!f.considerAmt) missing.push('Consider Amt');
+      if (!f.nav) missing.push('NAV');
+    } else {
+      if (!f.faceValue) missing.push('Face Value');
+      if (!f.purchaseRate) missing.push('Purchase Rate');
+      if (!f.lastIntDt) missing.push('Last Interest Date');
+    }
+    if (!f.category) missing.push('Category');
+    if (!f.crToAc) missing.push('CR. To A/c');
+    if (missing.length) {
+      this.toast(`Please fill: ${missing.join(', ')}.`);
       return;
     }
-    const holding: InvestmentHolding = {
-      certNo: f.certNo,
-      instrumentType: f.bondType,
-      scriptCode: f.scriptCode || f.isin || f.productName,
-      scriptName: this.isMutualFund
-        ? f.productName
-        : this.scriptOptions.find((s) => s.scriptCode === f.scriptCode)?.scriptName || f.scriptCode || f.isin,
-      party: f.partyCode,
-      subType: f.subType,
-      faceValue: this.purchaseBaseAmount,
-      purchaseRate: this.isMutualFund ? f.nav || 0 : f.purchaseRate || 100,
-      units: this.purchaseUnits,
-      purchaseDate: f.issueDate,
-      maturityDate: this.purchaseMaturityDate || f.issueDate,
-      interestRate: f.intRate || 0,
-      interestFreq: this.isMutualFund ? 'CUMULATIVE' : f.intType,
-      glCode:
-        '31' +
-        (f.bondType === 'GOVT_SECURITY'
-          ? '0020'
-          : f.bondType === 'NON_SLR'
-            ? '0030'
-            : f.bondType === 'BOND'
-              ? '0040'
-              : '0050'),
-      glName: `INVESTMENT IN ${INSTRUMENT_LABELS[f.bondType].toUpperCase()}`,
-      crToAc: f.crToAc,
-      brokerCode: f.brokerName,
-      status: 'ACTIVE'
+    const script = this.purchaseScript;
+    const party = this.partyOptions.find((p) => p.partyCode === f.partyCode);
+    const crGlAccountId = this.glIdByCode.get(f.crToAc);
+    if (!script?.id || !party?.id) {
+      this.toast('Script and Party must be saved in Investment Masters first.');
+      return;
+    }
+    if (!crGlAccountId) {
+      this.toast(`GL ${f.crToAc} was not found in the chart of accounts.`);
+      return;
+    }
+    const body = {
+      bondType: f.bondType,
+      scriptId: script.id,
+      partyId: party.id,
+      dealDate: f.dealDate,
+      dealTime: f.dealTime || '',
+      settlementType: f.settlementType,
+      ...(this.isMutualFund
+        ? { considerAmt: f.considerAmt, nav: f.nav, stampDuty: f.stampDuty ?? null }
+        : { faceValue: f.faceValue, purchaseRate: f.purchaseRate, lastIntDate: f.lastIntDt }),
+      brokerage: f.brokerage ?? null,
+      category: f.category,
+      crGlAccountId,
+      subType: f.subType || '',
+      otherDetails: this.purchaseOtherDetails(),
+      dateFormat: 'dd-MM-yyyy',
+      locale: 'en'
     };
-    this.holdings = [
-      holding,
-      ...this.holdings
-    ];
-    this.txns = [
-      {
-        certNo: holding.certNo,
-        instrumentType: f.bondType,
-        txnType: 'PURCHASE',
-        voucherNo: `INV/PUR/${f.dealNo}`,
-        txnDate: f.dealDate,
-        amount: this.purchaseSettlementAmount,
-        particulars: `Purchase Deal ${f.dealNo} - ${holding.scriptName} - ${holding.party}${f.category ? ' [' + f.category + ']' : ''}`
+    this.investmentService.createPurchase(body).subscribe({
+      next: (res) => {
+        this.toast(`Deal ${res.resourceIdentifier} saved. GL posting will follow once accounting is approved.`);
+        this.activeTab = 'holdings';
+        this.loadPurchases();
       },
-      ...this.txns
-    ];
-    this.toast(`${INSTRUMENT_LABELS[f.bondType]} Certificate ${holding.certNo} saved successfully.`);
-    this.purchaseForm = this.blankPurchaseForm();
-    this.activeTab = 'holdings';
+      error: (err) => this.toast(apiErrorMessage(err))
+    });
+  }
+
+  /** The optional "More Details" fields, kept with the deal as they were entered. */
+  private purchaseOtherDetails(): Record<string, string | number> {
+    const f = this.purchaseForm;
+    const fields: Record<string, string | number | null> = {
+      tradeNo: f.tradeNo,
+      orderNo: f.orderNo,
+      brokerCode: f.brokerName,
+      recommAuthority: f.recommAuthority,
+      sanctionAuthority: f.sanctionAuthority,
+      meetDate: f.meetDt,
+      resoNo: f.resoNo,
+      dealType: f.dealType,
+      market: f.market,
+      markCblo: f.markCblo,
+      paymentMode: f.paymentMode,
+      deliveryMode: f.deliveryMode,
+      lien: f.lien,
+      lienAmount: f.lienAmount,
+      lienReason: f.lienReason,
+      bondRating: f.bondRating,
+      corpBond: f.corpBond,
+      sglWithBank: f.sglWithBank,
+      tbillGlAc: f.tbillGlAc,
+      intType: f.intType,
+      intDate: f.intDate,
+      folioNo: f.folioNo,
+      callOption: f.callOption,
+      descInv: f.descInv,
+      fromDist: f.fromDist,
+      toDist: f.toDist,
+      amortizeAmt: f.amortizeAmt,
+      registerAddress: f.registerAdd,
+      registerCity: f.regiCity,
+      registerPin: f.regiPin,
+      remarks: f.remarks,
+      description: f.description,
+      tradeAmt: f.tradeAmt,
+      holdingDays: f.holdingDays,
+      stampDutyAc: f.stampDutyAc
+    };
+    const out: Record<string, string | number> = {};
+    for (const [
+      k,
+      v
+    ] of Object.entries(fields)) {
+      if (v !== null && v !== undefined && v !== '') {
+        out[k] = v;
+      }
+    }
+    return out;
   }
 
   cancelPurchase(): void {
@@ -576,9 +805,10 @@ export class BondInvestmentComponent {
 
   /** Legacy "Retrieve" button — loads an existing deal back into the form by Cert No. */
   retrievePurchase(): void {
-    const h = this.holdings.find((x) => x.certNo === this.purchaseForm.certNo.trim());
+    const certNo = this.retrieveCertNo.trim();
+    const h = this.holdings.find((x) => x.certNo === certNo);
     if (!h) {
-      this.toast(`Cert No ${this.purchaseForm.certNo} not found.`);
+      this.toast(`Cert No ${certNo || '(blank)'} not found.`);
       return;
     }
     this.purchaseForm = {
@@ -587,7 +817,8 @@ export class BondInvestmentComponent {
       certNo: h.certNo,
       scriptCode: h.scriptCode,
       isin: this.scriptOptions.find((s) => s.scriptCode === h.scriptCode)?.isin || '',
-      partyCode: h.party,
+      dealNo: h.dealNo ?? '',
+      partyCode: h.partyCode ?? '',
       subType: h.subType,
       faceValue: h.faceValue,
       considerAmt: h.faceValue,
@@ -599,22 +830,26 @@ export class BondInvestmentComponent {
       intType: h.interestFreq,
       brokerName: h.brokerCode,
       crToAc: h.crToAc,
-      productName: h.scriptName
+      productName: h.scriptName,
+      category: h.category ?? ''
     };
     this.bondType = h.instrumentType as BondType;
     this.toast(`Deal for Cert No ${h.certNo} retrieved.`);
   }
 
   dropPurchase(): void {
-    const certNo = this.purchaseForm.certNo;
-    if (!this.holdings.some((h) => h.certNo === certNo)) {
-      this.toast('Nothing to drop — this deal is not yet saved.');
+    const h = this.holdings.find((x) => x.certNo === this.purchaseForm.certNo);
+    if (!h?.id) {
+      this.toast('Retrieve a saved deal first, then Drop.');
       return;
     }
-    this.holdings = this.holdings.filter((h) => h.certNo !== certNo);
-    this.txns = this.txns.filter((t) => t.certNo !== certNo);
-    this.purchaseForm = this.blankPurchaseForm();
-    this.toast(`Cert No ${certNo} dropped.`);
+    this.investmentService.deletePurchase(h.id).subscribe({
+      next: () => {
+        this.toast(`Deal ${h.dealNo} (Cert No ${h.certNo}) dropped.`);
+        this.loadPurchases();
+      },
+      error: (err) => this.toast(apiErrorMessage(err))
+    });
   }
 
   exitPurchase(): void {
@@ -658,78 +893,53 @@ export class BondInvestmentComponent {
   }
 
   // -------------------- Interest calculation --------------------
-  /** Holdings the Interest Calculation "Process" run would cover, given the filters. A
-   *  Non-Performing holding is always excluded — same accrual-basis rule as the Investment
-   *  Interest module (it's still collectible on cash basis via Interest Receive there). */
-  get intCalcTargets(): InvestmentHolding[] {
-    const base = this.holdings.filter((h) => h.status === 'ACTIVE' && canAccrueInterest(h));
-    if (this.intCalcAll) {
-      return base;
+  /** Saved holdings for the Deal No dropdown, narrowed by Type and Script. */
+  get intDealOptions(): InvestmentHolding[] {
+    return this.holdings.filter(
+      (h) =>
+        h.id != null &&
+        h.status === 'ACTIVE' &&
+        (!this.intType || h.instrumentType === this.intType) &&
+        (!this.intScript || h.scriptCode === this.intScript)
+    );
+  }
+
+  get intScriptOptions(): typeof SCRIPT_MASTER {
+    return this.scriptOptions.filter((s) => !this.intType || s.instrumentType === this.intType);
+  }
+
+  onIntFilterChange(): void {
+    if (this.intScript && !this.intScriptOptions.some((s) => s.scriptCode === this.intScript)) {
+      this.intScript = '';
     }
-    return base.filter((h) => {
-      if (this.intCalcType && h.instrumentType !== this.intCalcType) return false;
-      if (this.intCalcScript && h.scriptCode !== this.intCalcScript) return false;
-      if (this.intCalcDealNo && h.certNo !== this.intCalcDealNo.trim()) return false;
-      return true;
-    });
-  }
-
-  get intCalcExcludedNpi(): InvestmentHolding[] {
-    return this.holdings.filter((h) => h.status === 'ACTIVE' && !canAccrueInterest(h));
-  }
-
-  /** Re-suggests the Interest Income GL when the Type filter changes — still overridable. */
-  onIntCalcTypeChange(): void {
-    if (this.intCalcType) {
-      this.intCalcGlCode = INTEREST_INCOME_GL_BY_TYPE[this.intCalcType];
+    if (this.intPurchaseId != null && !this.intDealOptions.some((h) => h.id === this.intPurchaseId)) {
+      this.intPurchaseId = null;
     }
+    this.intSchedule = null;
   }
 
-  glName(glCode: string): string {
-    return this.interestIncomeGlOptions.find((g) => g.glCode === glCode)?.glName ?? glCode;
-  }
-
-  /** Interest accrued strictly within [intCalcFromDate, intCalcToDate] — a period-based
-   *  Interest Calculation & Post run, same basis as the Investment Interest module. */
-  interestAccrued(h: InvestmentHolding): number {
-    return accruedInterestBetween(h, this.intCalcFromDate || h.purchaseDate, this.intCalcToDate || this.asOnDate);
-  }
-
-  processInterest(): void {
-    const targets = this.intCalcTargets.filter((h) => this.interestAccrued(h) > 0);
-    if (targets.length === 0) {
-      this.toast('No holdings have interest due to be posted for this period.');
+  retrieveInterestSchedule(): void {
+    if (this.intPurchaseId == null) {
+      this.toast('Select a Deal No first.');
       return;
     }
-    const toDate = this.intCalcToDate || this.asOnDate;
-    const fromDate = this.intCalcFromDate || toDate;
-    const glCode = this.intCalcGlCode;
-    const glName = this.glName(glCode);
-    const newTxns: InvestmentTxn[] = targets.map((h, i) => {
-      const amt = this.interestAccrued(h);
-      h.interestPosted = (h.interestPosted ?? 0) + amt;
-      h.interestPostedTillDate = toDate;
-      return {
-        certNo: h.certNo,
-        instrumentType: h.instrumentType,
-        txnType: 'INTEREST',
-        voucherNo: `INV/INT/${h.certNo}-${this.txns.length + i + 1}`,
-        txnDate: toDate,
-        amount: amt,
-        particulars: `Interest calculated (accrual) for period ${fromDate} to ${toDate} - ${h.scriptName}`,
-        glCode,
-        glName
-      };
+    this.intLoading = true;
+    this.investmentService.getInterestSchedule(this.intPurchaseId, this.intAsOnDate || undefined).subscribe({
+      next: (schedule) => {
+        this.intSchedule = schedule;
+        this.intLoading = false;
+      },
+      error: (err) => {
+        this.intSchedule = null;
+        this.intLoading = false;
+        this.toast(apiErrorMessage(err));
+      }
     });
-    this.txns = [
-      ...newTxns,
-      ...this.txns
-    ];
-    this.intCalcFromDate = toDate;
-    const total = newTxns.reduce((s, t) => s + t.amount, 0);
-    this.toast(
-      `Interest processed for ${targets.length} holding(s) to ${glCode} - ${glName}. Total ₹${total.toLocaleString('en-IN')}.`
-    );
+  }
+
+  /** Total of the lines falling due up to the as-on date. */
+  get intDueTotal(): number {
+    return (this.intSchedule?.rows ?? []).filter((r) => r.due).reduce((sum, r) => sum + r.amount, 0);
   }
 
   // -------------------- Sell / Redeem Entry --------------------

src/app/investment/investment-data.ts

@@ -123,6 +123,16 @@ export interface InvestmentHolding {
    *  never re-counts days up to this date, so re-running a Calculation & Post for an overlapping
    *  or repeated period always yields 0 instead of double-posting the same interest. */
   interestPostedTillDate?: string;
+  /** RBI investment category chosen at purchase — HTM / AFS / HFT. */
+  category?: string;
+  /** SGL / CSGL account the security is held in (custody, not an accounting GL). */
+  sglAccountNo?: string;
+  /** Backend id / deal number / party code once the purchase is saved (absent on sample rows). */
+  id?: number;
+  dealNo?: string;
+  partyCode?: string;
+  bookValue?: number;
+  settlementAmount?: number;
 }
 
 export interface InvestmentTxn {
@@ -248,6 +258,51 @@ export function accruedInterestBetween(h: InvestmentHolding, fromStr: string, to
   return Math.round(h.faceValue * (h.interestRate / 100) * (days / 365.25));
 }
 
+/** Days between two DD-MM-YYYY dates on a 30/360 basis (every month 30 days), as the bank's existing
+ *  CBS counts them — e.g. 10-08 → 30-09 = 50 days, 10-08 → 07-10 = 57 days. */
+export function days360(fromStr: string, toStr: string): number {
+  const a = parseDDMMYYYY(fromStr);
+  const b = parseDDMMYYYY(toStr);
+  if (isNaN(a.getTime()) || isNaN(b.getTime()) || b <= a) {
+    return 0;
+  }
+  const d1 = Math.min(a.getDate(), 30);
+  const d2 = Math.min(b.getDate(), 30);
+  return (b.getFullYear() - a.getFullYear()) * 360 + (b.getMonth() - a.getMonth()) * 30 + (d2 - d1);
+}
+
+/** Most recent half-yearly coupon date on or before `onStr`, derived from the maturity date (coupons
+ *  fall on the maturity day/month and six months either side of it). */
+export function lastHalfYearlyCouponDate(maturityStr: string, onStr: string): string {
+  const mat = parseDDMMYYYY(maturityStr);
+  const on = parseDDMMYYYY(onStr);
+  if (isNaN(mat.getTime()) || isNaN(on.getTime())) {
+    return '';
+  }
+  const day = mat.getDate();
+  const couponOn = (year: number, month: number): Date => {
+    const lastDay = new Date(year, month + 1, 0).getDate();
+    return new Date(year, month, Math.min(day, lastDay));
+  };
+  const months = [
+    mat.getMonth() % 6,
+    (mat.getMonth() % 6) + 6
+  ];
+  let best: Date | undefined;
+  for (const year of [
+    on.getFullYear() - 1,
+    on.getFullYear()
+  ]) {
+    for (const m of months) {
+      const c = couponOn(year, m);
+      if (c <= on && (!best || c > best)) {
+        best = c;
+      }
+    }
+  }
+  return best ? formatDDMMYYYY(best) : '';
+}
+
 export function formatDDMMYYYY(d: Date): string {
   return `${String(d.getDate()).padStart(2, '0')}-${String(d.getMonth() + 1).padStart(2, '0')}-${d.getFullYear()}`;
 }
@@ -1404,99 +1459,319 @@ export const CASH_BANK_GL_MASTER: InvestmentGlOption[] = [
   { glCode: '110030', glName: 'HDFC BANK CURRENT ACCOUNT' }
 ];
 
+/** Investment GLs a script / party can be mapped to. PROPOSED codes awaiting approval — the
+ *  backend will take these from the chart of accounts, never hard-coded. */
+export const INVESTMENT_GL_OPTIONS: InvestmentGlOption[] = [
+  { glCode: '100701', glName: 'INVESTMENT IN CENTRAL GOVT SECURITIES' },
+  { glCode: '100702', glName: 'INVESTMENT IN STATE GOVT SECURITIES' },
+  { glCode: '100703', glName: 'INVESTMENT IN BONDS / DEBENTURES' },
+  { glCode: '100704', glName: 'FIXED DEPOSITS WITH OTHER BANKS' },
+  { glCode: '100705', glName: 'INVESTMENT IN MUTUAL FUNDS' },
+  { glCode: '100706', glName: 'INVESTMENT IN SHARES' }
+];
+
+/** Fallback investment GL when a script has none mapped. */
+export const INVESTMENT_GL_BY_TYPE: Record<InstrumentType, string> = {
+  GOVT_SECURITY: '100701',
+  NON_SLR: '100703',
+  BOND: '100703',
+  FD: '100704',
+  MUTUAL_FUND: '100705',
+  SHARE: '100706'
+};
+
+/** Interest receivable (the senior's "Provision A/c") — debited for interest bought from the seller. */
+export const INTEREST_RECEIVABLE_GL: InvestmentGlOption = {
+  glCode: '100603',
+  glName: 'INTEREST RECEIVABLE ON INVESTMENTS (PROVISION)'
+};
+
+/** Bank accounts a purchase can be paid from — these GLs already exist in the chart of accounts. */
+export const SETTLEMENT_BANK_GL_OPTIONS: InvestmentGlOption[] = [
+  { glCode: '100201', glName: 'IDBI BANK' },
+  { glCode: '100202', glName: 'YES BANK' }
+];
+
+/** Every GL the Investment screens can show by name. */
+export const INVESTMENT_GL_LOOKUP: InvestmentGlOption[] = [
+  ...INVESTMENT_GL_OPTIONS,
+  INTEREST_RECEIVABLE_GL,
+  ...SETTLEMENT_BANK_GL_OPTIONS
+];
+
+/** SLR classification on the Script Master, as in the bank's existing CBS ("GOI" = Central Govt). */
+export type SlrType = 'GOI' | 'STATE_GOVT' | 'TREASURY' | 'NON_SLR';
+
+export const SLR_TYPE_OPTIONS: Array<{ value: SlrType; label: string }> = [
+  { value: 'GOI', label: 'GOI' },
+  { value: 'STATE_GOVT', label: 'STATE GOVT' },
+  { value: 'TREASURY', label: 'TREASURY' },
+  { value: 'NON_SLR', label: 'NON SLR' }
+];
+
 export interface ScriptMaster {
+  /** Backend id once the script is saved (absent on the sample rows). */
+  id?: number;
   scriptCode: string;
   scriptName: string;
   instrumentType: InstrumentType;
   isin: string;
   faceValuePerUnit: number;
+  // Fields below follow the bank's existing CBS Script Master; a purchase picks them up instead
+  // of the dealer re-typing them on every deal.
+  slrType?: SlrType;
+  /** Investment GL this script is booked to. */
+  glAccountId?: number;
+  glCode?: string;
+  glName?: string;
+  active?: boolean;
+  /** Interest (coupon) rate % per annum. */
+  couponRate?: number;
+  issueDate?: string;
+  maturityDate?: string;
+  // Issuer details — used for Bond / Mutual Fund scripts.
+  companyName?: string;
+  address1?: string;
+  address2?: string;
+  address3?: string;
+  city?: string;
+  pincode?: string;
+  phone?: string;
+  fax?: string;
+  corpCode?: string;
+}
+
+/** Period between two DD-MM-YYYY dates as years / months / days, as shown on the Script Master. */
+export function periodBetween(fromStr?: string, toStr?: string): { years: number; months: number; days: number } {
+  const none = { years: 0, months: 0, days: 0 };
+  if (!fromStr || !toStr) {
+    return none;
+  }
+  const from = parseDDMMYYYY(fromStr);
+  const to = parseDDMMYYYY(toStr);
+  if (isNaN(from.getTime()) || isNaN(to.getTime()) || to < from) {
+    return none;
+  }
+  let years = to.getFullYear() - from.getFullYear();
+  let months = to.getMonth() - from.getMonth();
+  let days = to.getDate() - from.getDate();
+  if (days < 0) {
+    months -= 1;
+    days += new Date(to.getFullYear(), to.getMonth(), 0).getDate();
+  }
+  if (months < 0) {
+    years -= 1;
+    months += 12;
+  }
+  return { years, months, days };
 }
 
 export const SCRIPT_MASTER: ScriptMaster[] = [
-  { scriptCode: 'FD-CUM', scriptName: 'Cumulative Fixed Deposit', instrumentType: 'FD', isin: '', faceValuePerUnit: 1 },
+  {
+    scriptCode: 'FD-CUM',
+    scriptName: 'Cumulative Fixed Deposit',
+    instrumentType: 'FD',
+    isin: '',
+    faceValuePerUnit: 1,
+    slrType: 'NON_SLR',
+    glCode: '100704'
+  },
   {
     scriptCode: 'FD-MIP',
     scriptName: 'Monthly Interest Payout FD',
     instrumentType: 'FD',
     isin: '',
-    faceValuePerUnit: 1
+    faceValuePerUnit: 1,
+    slrType: 'NON_SLR',
+    glCode: '100704'
   },
   {
     scriptCode: 'IN0020230012',
     scriptName: '7.26% GOI 2033',
     instrumentType: 'GOVT_SECURITY',
     isin: 'IN0020230012',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'GOI',
+    glCode: '100701',
+    couponRate: 7.26,
+    issueDate: '15-01-2023',
+    maturityDate: '15-01-2033'
   },
   {
     scriptCode: 'IN0020220089',
     scriptName: '7.10% GOI 2029',
     instrumentType: 'GOVT_SECURITY',
     isin: 'IN0020220089',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'GOI',
+    glCode: '100701',
+    couponRate: 7.1,
+    issueDate: '10-03-2022',
+    maturityDate: '10-03-2029'
+  },
+  {
+    scriptCode: 'IN0020210056',
+    scriptName: '6.79% GOI 2027',
+    instrumentType: 'GOVT_SECURITY',
+    isin: 'IN0020210056',
+    faceValuePerUnit: 100,
+    slrType: 'GOI',
+    glCode: '100701',
+    couponRate: 6.79,
+    issueDate: '05-06-2021',
+    maturityDate: '05-06-2027'
+  },
+  {
+    scriptCode: 'IN0020240034',
+    scriptName: '7.18% GOI 2037',
+    instrumentType: 'GOVT_SECURITY',
+    isin: 'IN0020240034',
+    faceValuePerUnit: 100,
+    slrType: 'GOI',
+    glCode: '100701',
+    couponRate: 7.18,
+    issueDate: '22-04-2024',
+    maturityDate: '22-04-2037'
+  },
+  {
+    scriptCode: 'MH-SDL-2031',
+    scriptName: '8.05% Maharashtra SDL 2031',
+    instrumentType: 'GOVT_SECURITY',
+    isin: '',
+    faceValuePerUnit: 100,
+    slrType: 'STATE_GOVT',
+    glCode: '100702',
+    couponRate: 8.05,
+    issueDate: '15-02-2021',
+    maturityDate: '15-02-2031'
+  },
+  {
+    scriptCode: 'GJ-SDL-2026',
+    scriptName: '7.85% Gujarat SDL 2026',
+    instrumentType: 'GOVT_SECURITY',
+    isin: '',
+    faceValuePerUnit: 100,
+    slrType: 'STATE_GOVT',
+    glCode: '100702',
+    couponRate: 7.85,
+    issueDate: '18-09-2016',
+    maturityDate: '18-09-2026'
   },
   {
     scriptCode: 'TBILL-364D',
     scriptName: '364 Days Treasury Bill',
     instrumentType: 'GOVT_SECURITY',
     isin: '',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'TREASURY',
+    glCode: '100701',
+    couponRate: 0,
+    issueDate: '02-07-2026',
+    maturityDate: '02-07-2027'
+  },
+  {
+    scriptCode: 'TBILL-91D',
+    scriptName: '91 Days Treasury Bill',
+    instrumentType: 'GOVT_SECURITY',
+    isin: '',
+    faceValuePerUnit: 100,
+    slrType: 'TREASURY',
+    glCode: '100701',
+    couponRate: 0,
+    issueDate: '15-05-2026',
+    maturityDate: '13-08-2026'
   },
   {
     scriptCode: 'REC-7.5-2031',
     scriptName: 'REC Ltd Bond 7.50% 2031',
     instrumentType: 'NON_SLR',
     isin: 'INE020B08JN0',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'NON_SLR',
+    glCode: '100703',
+    couponRate: 7.5,
+    issueDate: '11-08-2021',
+    maturityDate: '11-08-2031',
+    companyName: 'REC Limited',
+    city: 'New Delhi'
   },
   {
     scriptCode: 'NABARD-7.35-2030',
     scriptName: 'NABARD Bond 7.35% 2030',
     instrumentType: 'NON_SLR',
     isin: 'INE261F09EU1',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'NON_SLR',
+    glCode: '100703',
+    couponRate: 7.35,
+    issueDate: '20-09-2020',
+    maturityDate: '20-09-2030',
+    companyName: 'NABARD',
+    city: 'Mumbai'
   },
   {
     scriptCode: 'LTF-8.1-2028',
     scriptName: 'L&T Finance NCD 8.10% 2028',
     instrumentType: 'BOND',
     isin: 'INE027E07BR5',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'NON_SLR',
+    glCode: '100703',
+    couponRate: 8.1,
+    companyName: 'L&T Finance Ltd',
+    city: 'Mumbai'
   },
   {
     scriptCode: 'BAF-7.95-2027',
     scriptName: 'Bajaj Finance NCD 7.95% 2027',
     instrumentType: 'BOND',
     isin: 'INE296A07SP0',
-    faceValuePerUnit: 100
+    faceValuePerUnit: 100,
+    slrType: 'NON_SLR',
+    glCode: '100703',
+    couponRate: 7.95,
+    companyName: 'Bajaj Finance Ltd',
+    city: 'Pune'
   },
   {
     scriptCode: 'SBI-OVN',
     scriptName: 'SBI Overnight Fund',
     instrumentType: 'MUTUAL_FUND',
     isin: 'INF200KA1Q40',
-    faceValuePerUnit: 1000
+    faceValuePerUnit: 1000,
+    slrType: 'NON_SLR',
+    glCode: '100705',
+    companyName: 'SBI Mutual Fund',
+    city: 'Mumbai'
   },
   {
     scriptCode: 'HDFC-LIQ',
     scriptName: 'HDFC Liquid Fund',
     instrumentType: 'MUTUAL_FUND',
     isin: 'INF179KA1WR9',
-    faceValuePerUnit: 1000
+    faceValuePerUnit: 1000,
+    slrType: 'NON_SLR',
+    glCode: '100705',
+    companyName: 'HDFC Mutual Fund',
+    city: 'Mumbai'
   },
   {
     scriptCode: 'SBIN',
     scriptName: 'State Bank of India',
     instrumentType: 'SHARE',
     isin: 'INE062A01020',
-    faceValuePerUnit: 1
+    faceValuePerUnit: 1,
+    slrType: 'NON_SLR',
+    glCode: '100706'
   },
   {
     scriptCode: 'HDFCBANK',
     scriptName: 'HDFC Bank Ltd',
     instrumentType: 'SHARE',
     isin: 'INE040A01034',
-    faceValuePerUnit: 1
+    faceValuePerUnit: 1,
+    slrType: 'NON_SLR',
+    glCode: '100706'
   }
 ];
 
@@ -1561,23 +1836,150 @@ export const BROKER_MASTER: BrokerMaster[] = [
 ];
 
 export interface PartyMaster {
+  /** Backend id once the party is saved (absent on the sample rows). */
+  id?: number;
   partyCode: string;
   partyName: string;
   partyType: 'BANK' | 'CORPORATE' | 'GOVT' | 'AMC' | 'EXCHANGE' | 'COOP_SOCIETY';
-  panNo: string;
+  panNo?: string;
+  // Fields below follow the bank's existing CBS Bank / Party Master.
+  bondType?: InstrumentType;
+  address1?: string;
+  address2?: string;
+  address3?: string;
+  city?: string;
+  pincode?: string;
+  phone?: string;
+  fax?: string;
+  bankType?: string;
+  /** GL this party is mapped to. */
+  glAccountId?: number;
+  glCode?: string;
+  glName?: string;
+  rbiCode?: string;
+  /** Exposure limit for this party (₹). */
+  limit?: number | null;
+  leiNo?: string;
+  // Counterparty's bank details
+  cpBankName?: string;
+  cpBranchName?: string;
+  cpAccountNo?: string;
+  cpIfsc?: string;
+  /** Absent means ACTIVE. An INACTIVE party is not offered for new deals. */
+  status?: 'ACTIVE' | 'INACTIVE';
 }
 
+/** Sample Bank Type options until the bank confirms its list. */
+export const BANK_TYPE_OPTIONS = [
+  'SCHEDULED COMMERCIAL BANK',
+  'STATE CO-OPERATIVE BANK',
+  'DISTRICT CENTRAL CO-OPERATIVE BANK',
+  'URBAN CO-OPERATIVE BANK',
+  'RBI / GOVERNMENT',
+  'OTHER'
+];
+
 export const PARTY_MASTER: PartyMaster[] = [
-  { partyCode: 'PTY-001', partyName: 'Jila Sahakari Kendriya Bank', partyType: 'BANK', panNo: 'AABCJ1234K' },
-  { partyCode: 'PTY-002', partyName: 'State Cooperative Bank Ltd', partyType: 'BANK', panNo: 'AABCS5678L' },
-  { partyCode: 'PTY-003', partyName: 'RBI - SGL', partyType: 'GOVT', panNo: 'AAACR4849R' },
-  { partyCode: 'PTY-004', partyName: 'REC Limited', partyType: 'CORPORATE', panNo: 'AAACR0641G' },
-  { partyCode: 'PTY-005', partyName: 'NABARD', partyType: 'CORPORATE', panNo: 'AAACN0272B' },
-  { partyCode: 'PTY-006', partyName: 'L&T Finance Ltd', partyType: 'CORPORATE', panNo: 'AAACL0140P' },
-  { partyCode: 'PTY-007', partyName: 'SBI Mutual Fund', partyType: 'AMC', panNo: 'AAATS4325L' },
-  { partyCode: 'PTY-008', partyName: 'HDFC Mutual Fund', partyType: 'AMC', panNo: 'AAATH1234M' },
-  { partyCode: 'PTY-009', partyName: 'NSE/BSE', partyType: 'EXCHANGE', panNo: 'AAACN0028G' },
-  { partyCode: 'PTY-010', partyName: 'District Cooperative Bank', partyType: 'COOP_SOCIETY', panNo: 'AABCD9988K' }
+  {
+    partyCode: 'PTY-001',
+    partyName: 'Jila Sahakari Kendriya Bank',
+    partyType: 'BANK',
+    bondType: 'FD',
+    glCode: '100704',
+    city: 'Vidisha',
+    bankType: 'DISTRICT CENTRAL CO-OPERATIVE BANK',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-002',
+    partyName: 'State Cooperative Bank Ltd',
+    partyType: 'BANK',
+    bondType: 'FD',
+    glCode: '100704',
+    city: 'Bhopal',
+    bankType: 'STATE CO-OPERATIVE BANK',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-003',
+    partyName: 'RBI - SGL',
+    partyType: 'GOVT',
+    bondType: 'GOVT_SECURITY',
+    glCode: '100701',
+    city: 'Mumbai',
+    bankType: 'RBI / GOVERNMENT',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-004',
+    partyName: 'REC Limited',
+    partyType: 'CORPORATE',
+    bondType: 'NON_SLR',
+    glCode: '100703',
+    city: 'New Delhi',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-005',
+    partyName: 'NABARD',
+    partyType: 'CORPORATE',
+    bondType: 'NON_SLR',
+    glCode: '100703',
+    city: 'Mumbai',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-006',
+    partyName: 'L&T Finance Ltd',
+    partyType: 'CORPORATE',
+    bondType: 'BOND',
+    glCode: '100703',
+    city: 'Mumbai',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-007',
+    partyName: 'SBI Mutual Fund',
+    partyType: 'AMC',
+    bondType: 'MUTUAL_FUND',
+    glCode: '100705',
+    city: 'Mumbai',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-008',
+    partyName: 'HDFC Mutual Fund',
+    partyType: 'AMC',
+    bondType: 'MUTUAL_FUND',
+    glCode: '100705',
+    city: 'Mumbai',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-009',
+    partyName: 'NSE/BSE',
+    partyType: 'EXCHANGE',
+    bondType: 'SHARE',
+    glCode: '100706',
+    city: 'Mumbai',
+    bankType: 'OTHER',
+    status: 'ACTIVE'
+  },
+  {
+    partyCode: 'PTY-010',
+    partyName: 'District Cooperative Bank',
+    partyType: 'COOP_SOCIETY',
+    bondType: 'SHARE',
+    glCode: '100706',
+    city: 'Vidisha',
+    bankType: 'DISTRICT CENTRAL CO-OPERATIVE BANK',
+    status: 'ACTIVE'
+  }
 ];
 
 export interface SubTypeMaster {

src/app/investment/investment-masters/investment-masters.component.html

@@ -106,38 +106,112 @@
     </button>
   </div>
 
-  <!-- PARTY MASTER -->
+  <!-- PARTY MASTER (layout follows the bank's existing CBS Bank / Party Master) -->
   @if (activeTab === 'party') {
     <div class="pg-card">
-      <div class="pos-section-label">Add Bank / Party</div>
+      <div class="pos-section-label">Bank / Party Master — Entry</div>
       <div class="inv-form-grid">
-        <label class="inv-form-field"
-          ><span>Party Name *</span><input type="text" [(ngModel)]="newParty.partyName"
-        /></label>
         <label class="inv-form-field">
-          <span>Party Type *</span>
-          <select [(ngModel)]="newParty.partyType">
+          <span>* Bond Type</span>
+          <select [(ngModel)]="partyForm.bondType">
             <option [ngValue]="undefined">-- Select --</option>
-            <option value="BANK">BANK</option>
-            <option value="CORPORATE">CORPORATE</option>
-            <option value="GOVT">GOVT</option>
-            <option value="AMC">AMC</option>
-            <option value="EXCHANGE">EXCHANGE</option>
-            <option value="COOP_SOCIETY">COOP SOCIETY</option>
+            @for (t of instrumentTypes; track t) {
+              <option [value]="t">{{ t }}</option>
+            }
           </select>
         </label>
-        <label class="inv-form-field"><span>PAN No</span><input type="text" [(ngModel)]="newParty.panNo" /></label>
+        <label class="inv-form-field"
+          ><span>* Party Code</span><input type="text" [value]="partyForm.partyCode || nextPartyCode" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>* Party Name</span><input type="text" [(ngModel)]="partyForm.partyName"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 1 (Building / Flat No.)</span
+          ><input type="text" placeholder="e.g. Shop No. 12, Shanti Complex" [(ngModel)]="partyForm.address1"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 2 (Street / Area)</span
+          ><input type="text" placeholder="e.g. MG Road, Near Bus Stand" [(ngModel)]="partyForm.address2"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 3 (Locality / Landmark)</span
+          ><input type="text" placeholder="e.g. Arera Colony" [(ngModel)]="partyForm.address3"
+        /></label>
+        <label class="inv-form-field"><span>City</span><input type="text" [(ngModel)]="partyForm.city" /></label>
+        <label class="inv-form-field"
+          ><span>Pincode</span><input type="text" maxlength="6" [(ngModel)]="partyForm.pincode"
+        /></label>
+        <label class="inv-form-field"><span>Phone</span><input type="text" [(ngModel)]="partyForm.phone" /></label>
+        <label class="inv-form-field"><span>Fax</span><input type="text" [(ngModel)]="partyForm.fax" /></label>
+        <label class="inv-form-field">
+          <span>Bank Type</span>
+          <select [(ngModel)]="partyForm.bankType">
+            <option [ngValue]="undefined">-- Select --</option>
+            @for (b of bankTypeOptions; track b) {
+              <option [value]="b">{{ b }}</option>
+            }
+          </select>
+        </label>
+        <label class="inv-form-field">
+          <span>* GL A/c No.</span>
+          <select [(ngModel)]="partyForm.glAccountId">
+            <option [ngValue]="undefined">-- Select --</option>
+            @for (g of investmentGlOptions; track g.id) {
+              <option [ngValue]="g.id">{{ g.glCode }} — {{ g.name }}</option>
+            }
+          </select>
+        </label>
+        <label class="inv-form-field"><span>RBI Code</span><input type="text" [(ngModel)]="partyForm.rbiCode" /></label>
+        <label class="inv-form-field"
+          ><span>Limit (₹)</span><input type="number" min="0" [(ngModel)]="partyForm.limit"
+        /></label>
+        <label class="inv-form-field"><span>LEI No</span><input type="text" [(ngModel)]="partyForm.leiNo" /></label>
+        <label class="inv-form-field">
+          <span>Status</span>
+          <select [(ngModel)]="partyForm.status">
+            <option [ngValue]="undefined">ACTIVE</option>
+            <option value="INACTIVE">INACTIVE</option>
+          </select>
+        </label>
+      </div>
+      <div class="pos-section-label">Counterparty's Bank Details</div>
+      <div class="inv-form-grid">
+        <label class="inv-form-field"
+          ><span>Name of Bank</span><input type="text" [(ngModel)]="partyForm.cpBankName"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Name of Branch</span><input type="text" [(ngModel)]="partyForm.cpBranchName"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Account No.</span><input type="text" [(ngModel)]="partyForm.cpAccountNo"
+        /></label>
+        <label class="inv-form-field"
+          ><span>IFSC</span><input type="text" maxlength="11" [(ngModel)]="partyForm.cpIfsc"
+        /></label>
       </div>
       <div class="inv-form-actions">
-        <button type="button" class="pg-btn pg-btn--primary" (click)="addParty()">Save</button>
+        <label class="inv-form-field"
+          ><span>Search Party Code</span><input type="text" placeholder="e.g. PTY-001" [(ngModel)]="partySearchCode"
+        /></label>
+        <button type="button" class="pg-btn pg-btn--primary" [disabled]="saving" (click)="saveParty()">Save</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="searchParty()">Search</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="cancelParty()">Cancel</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="dropParty()">Drop</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="cancelParty()">Exit</button>
       </div>
       <table class="pg-table">
         <thead>
           <tr>
             <th>Party Code</th>
+            <th>Bond Type</th>
             <th>Party Name</th>
-            <th>Type</th>
-            <th>PAN No</th>
+            <th>City</th>
+            <th>Bank Type</th>
+            <th>GL A/c</th>
+            <th class="num">Limit</th>
+            <th>Counterparty Bank / IFSC</th>
+            <th>Status</th>
           </tr>
         </thead>
         <tbody>
@@ -146,9 +220,14 @@
               <td>
                 <span class="pg-chip">{{ p.partyCode }}</span>
               </td>
+              <td>{{ p.bondType || '—' }}</td>
               <td>{{ p.partyName }}</td>
-              <td>{{ p.partyType }}</td>
-              <td>{{ p.panNo }}</td>
+              <td>{{ p.city || '—' }}</td>
+              <td>{{ p.bankType || '—' }}</td>
+              <td>{{ p.glCode ? p.glCode + ' — ' + glName(p.glCode) : '—' }}</td>
+              <td class="num">{{ p.limit != null ? '₹' + (p.limit | number: '1.0-0') : '—' }}</td>
+              <td>{{ p.cpBankName ? p.cpBankName + (p.cpIfsc ? ' / ' + p.cpIfsc : '') : '—' }}</td>
+              <td>{{ p.status ?? 'ACTIVE' }}</td>
             </tr>
           }
         </tbody>
@@ -156,42 +235,118 @@
     </div>
   }
 
-  <!-- SCRIPT MASTER -->
+  <!-- SCRIPT MASTER (layout follows the bank's existing CBS Script Master) -->
   @if (activeTab === 'script') {
     <div class="pg-card">
-      <div class="pos-section-label">Add Script</div>
+      <div class="pos-section-label">Script Master — Entry</div>
       <div class="inv-form-grid">
-        <label class="inv-form-field"
-          ><span>Script Code</span><input type="text" [(ngModel)]="newScript.scriptCode"
-        /></label>
-        <label class="inv-form-field"
-          ><span>Script Name *</span><input type="text" [(ngModel)]="newScript.scriptName"
-        /></label>
         <label class="inv-form-field">
-          <span>Instrument Type *</span>
-          <select [(ngModel)]="newScript.instrumentType">
+          <span>* Bond Type</span>
+          <select [(ngModel)]="scriptForm.instrumentType" [disabled]="!!scriptForm.scriptCode">
             <option [ngValue]="undefined">-- Select --</option>
             @for (t of instrumentTypes; track t) {
               <option [value]="t">{{ t }}</option>
             }
           </select>
         </label>
-        <label class="inv-form-field"><span>ISIN</span><input type="text" [(ngModel)]="newScript.isin" /></label>
+        <label class="inv-form-field">
+          <span>SLR</span>
+          <select [(ngModel)]="scriptForm.slrType">
+            <option [ngValue]="undefined">-- Select --</option>
+            @for (o of slrTypeOptions; track o.value) {
+              <option [value]="o.value">{{ o.label }}</option>
+            }
+          </select>
+        </label>
         <label class="inv-form-field"
-          ><span>Face Value / Unit</span><input type="number" [(ngModel)]="newScript.faceValuePerUnit"
+          ><span>* Script Code</span><input type="text" [value]="scriptForm.scriptCode || nextScriptCode" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>* Script Desc</span
+          ><input type="text" placeholder="e.g. 7.50%GOI2034" [(ngModel)]="scriptForm.scriptName"
+        /></label>
+        <label class="inv-form-field">
+          <span>* GL A/c No.</span>
+          <select [(ngModel)]="scriptForm.glAccountId">
+            <option [ngValue]="undefined">-- Select --</option>
+            @for (g of investmentGlOptions; track g.id) {
+              <option [ngValue]="g.id">{{ g.glCode }} — {{ g.name }}</option>
+            }
+          </select>
+        </label>
+        <label class="inv-form-field"
+          ><span>{{ scriptIsDebtSecurity ? '* ' : '' }}ISIN</span><input type="text" [(ngModel)]="scriptForm.isin"
+        /></label>
+        <label class="inv-form-field"
+          ><span>{{ scriptIsDebtSecurity ? '* ' : '' }}Int Rate %</span
+          ><input type="number" step="0.01" min="0" [(ngModel)]="scriptForm.couponRate"
+        /></label>
+        <label class="inv-form-field"
+          ><span>{{ scriptIsDebtSecurity ? '* ' : '' }}Issue Date</span
+          ><mifosx-date-ddmmyyyy [(ngModel)]="scriptForm.issueDate"></mifosx-date-ddmmyyyy
+        ></label>
+        <label class="inv-form-field"
+          ><span>Redum / Mat Date</span
+          ><mifosx-date-ddmmyyyy [(ngModel)]="scriptForm.maturityDate"></mifosx-date-ddmmyyyy
+        ></label>
+        <label class="inv-form-field"
+          ><span>Period (Year)</span><input type="text" [value]="scriptPeriod.years" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Period (Month)</span><input type="text" [value]="scriptPeriod.months" readonly
+        /></label>
+        <label class="inv-form-field"
+          ><span>Period (Days)</span><input type="text" [value]="scriptPeriod.days" readonly
+        /></label>
+      </div>
+      <div class="pos-section-label">Company Details (Bond / Mutual Fund)</div>
+      <div class="inv-form-grid">
+        <label class="inv-form-field"
+          ><span>Company Name</span><input type="text" [(ngModel)]="scriptForm.companyName"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 1 (Building / Flat No.)</span
+          ><input type="text" placeholder="e.g. Shop No. 12, Shanti Complex" [(ngModel)]="scriptForm.address1"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 2 (Street / Area)</span
+          ><input type="text" placeholder="e.g. MG Road, Near Bus Stand" [(ngModel)]="scriptForm.address2"
+        /></label>
+        <label class="inv-form-field"
+          ><span>Address Line 3 (Locality / Landmark)</span
+          ><input type="text" placeholder="e.g. Arera Colony" [(ngModel)]="scriptForm.address3"
+        /></label>
+        <label class="inv-form-field"><span>City</span><input type="text" [(ngModel)]="scriptForm.city" /></label>
+        <label class="inv-form-field"
+          ><span>Pincode</span><input type="text" maxlength="6" [(ngModel)]="scriptForm.pincode"
+        /></label>
+        <label class="inv-form-field"><span>Phone</span><input type="text" [(ngModel)]="scriptForm.phone" /></label>
+        <label class="inv-form-field"><span>Fax</span><input type="text" [(ngModel)]="scriptForm.fax" /></label>
+        <label class="inv-form-field"
+          ><span>Corp. Code</span><input type="text" [(ngModel)]="scriptForm.corpCode"
         /></label>
       </div>
       <div class="inv-form-actions">
-        <button type="button" class="pg-btn pg-btn--primary" (click)="addScript()">Save</button>
+        <label class="inv-form-field"
+          ><span>Search Script Code</span><input type="text" placeholder="e.g. G00001" [(ngModel)]="scriptSearchCode"
+        /></label>
+        <button type="button" class="pg-btn pg-btn--primary" [disabled]="saving" (click)="saveScript()">Save</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="searchScript()">Search</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="cancelScript()">Cancel</button>
+        <button type="button" class="pg-btn pg-btn--ghost" (click)="cancelScript()">Exit</button>
       </div>
       <table class="pg-table">
         <thead>
           <tr>
             <th>Script Code</th>
-            <th>Script Name</th>
-            <th>Instrument</th>
+            <th>Bond Type</th>
+            <th>SLR</th>
+            <th>Script Desc</th>
+            <th>GL A/c</th>
             <th>ISIN</th>
-            <th class="num">Face Value/Unit</th>
+            <th class="num">Int Rate %</th>
+            <th>Issue Date</th>
+            <th>Maturity</th>
           </tr>
         </thead>
         <tbody>
@@ -200,10 +355,14 @@
               <td>
                 <span class="pg-chip">{{ s.scriptCode }}</span>
               </td>
-              <td>{{ s.scriptName }}</td>
               <td>{{ s.instrumentType }}</td>
+              <td>{{ s.slrType || '—' }}</td>
+              <td>{{ s.scriptName }}</td>
+              <td>{{ s.glCode || '—' }}</td>
               <td>{{ s.isin || '—' }}</td>
-              <td class="num">{{ s.faceValuePerUnit }}</td>
+              <td class="num">{{ s.couponRate ?? '—' }}</td>
+              <td>{{ s.issueDate || '—' }}</td>
+              <td>{{ s.maturityDate || '—' }}</td>
             </tr>
           }
         </tbody>

src/app/investment/investment-masters/investment-masters.component.ts

@@ -6,14 +6,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-import { Component } from '@angular/core';
+import { Component, OnInit, inject } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { FormsModule } from '@angular/forms';
 import { DateDdmmyyyyPickerComponent } from '../date-ddmmyyyy-picker/date-ddmmyyyy-picker.component';
 import {
-  SCRIPT_MASTER,
   BROKER_MASTER,
-  PARTY_MASTER,
   SUBTYPE_MASTER,
   CONTROL_PARAMETERS,
   MUTUAL_FUND_PRODUCTS,
@@ -31,9 +29,14 @@ import {
   ScriptMarketDetail,
   DailyScriptRate,
   LienReason,
-  InstrumentType
+  InstrumentType,
+  BANK_TYPE_OPTIONS,
+  SLR_TYPE_OPTIONS,
+  INVESTMENT_GL_LOOKUP,
+  periodBetween
 } from '../investment-data';
 import { exportWorkbook, ExportSheetSpec } from '../investment-export';
+import { InvestmentGlAccount, InvestmentService, apiErrorMessage } from '../investment.service';
 
 type MasterTab =
   | 'party'
@@ -65,12 +68,12 @@ type MasterTab =
     DateDdmmyyyyPickerComponent
   ]
 })
-export class InvestmentMastersComponent {
+export class InvestmentMastersComponent implements OnInit {
   activeTab: MasterTab = 'party';
 
-  scripts: ScriptMaster[] = [...SCRIPT_MASTER];
+  scripts: ScriptMaster[] = [];
   brokers: BrokerMaster[] = [...BROKER_MASTER];
-  parties: PartyMaster[] = [...PARTY_MASTER];
+  parties: PartyMaster[] = [];
   subTypes: SubTypeMaster[] = [...SUBTYPE_MASTER];
   controlParams: ControlParameter[] = [...CONTROL_PARAMETERS];
   mfProducts: MutualFundProductMaster[] = [...MUTUAL_FUND_PRODUCTS];
@@ -106,8 +109,19 @@ export class InvestmentMastersComponent {
   toastVisible = false;
   private toastTimer: ReturnType<typeof setTimeout> | undefined;
 
-  newParty: Partial<PartyMaster> = {};
-  newScript: Partial<ScriptMaster> = {};
+  // Bank / Party Master and Script Master follow the bank's existing CBS screens (one entry form
+  // with Save / Search / Cancel / Drop / Exit) and are stored in the backend through
+  // InvestmentService; the other master tabs are still sample data.
+  private readonly investmentService = inject(InvestmentService);
+  partyForm: Partial<PartyMaster> = {};
+  partySearchCode = '';
+  scriptForm: Partial<ScriptMaster> = {};
+  scriptSearchCode = '';
+  saving = false;
+  readonly bankTypeOptions = BANK_TYPE_OPTIONS;
+  readonly slrTypeOptions = SLR_TYPE_OPTIONS;
+  /** Enabled ASSET detail GLs from the chart of accounts. */
+  investmentGlOptions: InvestmentGlAccount[] = [];
   newSubType: Partial<SubTypeMaster> = {};
   newBroker: Partial<BrokerMaster> = {};
   newControlParam: Partial<ControlParameter> = {};
@@ -116,43 +130,216 @@ export class InvestmentMastersComponent {
   newSglBank: Partial<SglBankMaster> = {};
   newDailyRate: Partial<DailyScriptRate> = {};
 
+  ngOnInit(): void {
+    this.investmentService.getAssetGlAccounts().subscribe({
+      next: (gls) => (this.investmentGlOptions = gls),
+      error: (err) => this.toast(`Could not load GL accounts: ${apiErrorMessage(err)}`)
+    });
+    this.reloadMasters();
+  }
+
   setTab(tab: MasterTab): void {
     this.activeTab = tab;
   }
 
-  addParty(): void {
-    if (!this.newParty.partyName || !this.newParty.partyType) {
-      this.toast('Enter Party Name and Type.');
-      return;
-    }
-    this.parties = [
-      {
-        partyCode: `PTY-${String(this.parties.length + 1).padStart(3, '0')}`,
-        panNo: '',
-        ...this.newParty
-      } as PartyMaster,
-      ...this.parties
-    ];
-    this.newParty = {};
-    this.toast('Party/Bank master added.');
+  /** Re-reads both masters from the backend (also refreshes the lists the Purchase screen uses). */
+  private reloadMasters(): void {
+    this.investmentService.syncSharedMasters().subscribe({
+      next: ({ parties, scripts }) => {
+        this.parties = parties;
+        this.scripts = scripts;
+      },
+      error: (err) => this.toast(`Could not load masters: ${apiErrorMessage(err)}`)
+    });
   }
 
-  addScript(): void {
-    if (!this.newScript.scriptName || !this.newScript.instrumentType) {
-      this.toast('Enter Script Name and Instrument Type.');
+  glName(glCode?: string): string {
+    return (
+      this.investmentGlOptions.find((g) => g.glCode === glCode)?.name ??
+      INVESTMENT_GL_LOOKUP.find((g) => g.glCode === glCode)?.glName ??
+      ''
+    );
+  }
+
+  // -------------------- Bank / Party Master --------------------
+  /** Preview of the code the backend will assign; the saved code always comes from the backend. */
+  get nextPartyCode(): string {
+    const nums = this.parties.map((p) => parseInt(p.partyCode.replace(/\D/g, ''), 10)).filter((n) => !isNaN(n));
+    return `PTY-${String((nums.length ? Math.max(...nums) : 0) + 1).padStart(3, '0')}`;
+  }
+
+  saveParty(): void {
+    const f = this.partyForm;
+    if (!f.bondType || !f.partyName || !f.glAccountId) {
+      this.toast('Enter Bond Type, Party Name and GL A/c No.');
       return;
     }
-    this.scripts = [
-      {
-        scriptCode: this.newScript.scriptCode || `SCR-${this.scripts.length + 1}`,
-        isin: '',
-        faceValuePerUnit: 100,
-        ...this.newScript
-      } as ScriptMaster,
-      ...this.scripts
-    ];
-    this.newScript = {};
-    this.toast('Script master added.');
+    const body = {
+      bondType: f.bondType,
+      partyName: f.partyName,
+      address1: f.address1 ?? '',
+      address2: f.address2 ?? '',
+      address3: f.address3 ?? '',
+      city: f.city ?? '',
+      pincode: f.pincode ?? '',
+      phone: f.phone ?? '',
+      fax: f.fax ?? '',
+      bankType: f.bankType ?? '',
+      glAccountId: Number(f.glAccountId),
+      rbiCode: f.rbiCode ?? '',
+      limit: f.limit ?? null,
+      leiNo: f.leiNo ?? '',
+      cpBankName: f.cpBankName ?? '',
+      cpBranchName: f.cpBranchName ?? '',
+      cpAccountNo: f.cpAccountNo ?? '',
+      cpIfsc: f.cpIfsc ?? '',
+      active: f.status !== 'INACTIVE',
+      locale: 'en'
+    };
+    const request = f.id ? this.investmentService.updateParty(f.id, body) : this.investmentService.createParty(body);
+    this.saving = true;
+    request.subscribe({
+      next: (res) => {
+        this.saving = false;
+        this.toast(`Party ${res.resourceIdentifier ?? f.partyCode} ${f.id ? 'updated' : 'saved'}.`);
+        this.partyForm = {};
+        this.reloadMasters();
+      },
+      error: (err) => {
+        this.saving = false;
+        this.toast(apiErrorMessage(err));
+      }
+    });
+  }
+
+  searchParty(): void {
+    const p = this.parties.find((x) => x.partyCode.toUpperCase() === this.partySearchCode.trim().toUpperCase());
+    if (!p) {
+      this.toast(`Party Code ${this.partySearchCode} not found.`);
+      return;
+    }
+    this.partyForm = { ...p };
+    this.toast(`Party ${p.partyCode} loaded.`);
+  }
+
+  cancelParty(): void {
+    this.partyForm = {};
+    this.partySearchCode = '';
+  }
+
+  dropParty(): void {
+    const f = this.partyForm;
+    if (!f.id) {
+      this.toast('Search a saved party first, then Drop.');
+      return;
+    }
+    this.investmentService.deleteParty(f.id).subscribe({
+      next: () => {
+        this.toast(`Party ${f.partyCode} dropped.`);
+        this.partyForm = {};
+        this.reloadMasters();
+      },
+      error: (err) => this.toast(apiErrorMessage(err))
+    });
+  }
+
+  // -------------------- Script Master --------------------
+  /** Coupon / maturity terms only apply to debt securities. */
+  get scriptIsDebtSecurity(): boolean {
+    return [
+      'GOVT_SECURITY',
+      'NON_SLR',
+      'BOND'
+    ].includes(this.scriptForm.instrumentType ?? '');
+  }
+
+  /** Preview of the code the backend will assign — a type letter + running number, e.g. G00001. */
+  get nextScriptCode(): string {
+    const prefixByType: Record<InstrumentType, string> = {
+      GOVT_SECURITY: 'G',
+      NON_SLR: 'N',
+      BOND: 'B',
+      MUTUAL_FUND: 'M',
+      FD: 'F',
+      SHARE: 'S'
+    };
+    const type = this.scriptForm.instrumentType;
+    if (!type) {
+      return '';
+    }
+    const prefix = prefixByType[type];
+    const pattern = new RegExp(`^${prefix}(\\d{5})$`);
+    const nums = this.scripts
+      .map((s) => pattern.exec(s.scriptCode)?.[1])
+      .filter((n): n is string => !!n)
+      .map((n) => parseInt(n, 10));
+    return `${prefix}${String((nums.length ? Math.max(...nums) : 0) + 1).padStart(5, '0')}`;
+  }
+
+  get scriptPeriod(): { years: number; months: number; days: number } {
+    return periodBetween(this.scriptForm.issueDate, this.scriptForm.maturityDate);
+  }
+
+  saveScript(): void {
+    const f = this.scriptForm;
+    if (!f.instrumentType || !f.scriptName || !f.glAccountId) {
+      this.toast('Enter Bond Type, Script Desc and GL A/c No.');
+      return;
+    }
+    if (this.scriptIsDebtSecurity && (!f.isin || f.couponRate == null || !f.issueDate)) {
+      this.toast('Enter ISIN, Int Rate and Issue Date for this security.');
+      return;
+    }
+    const body = {
+      bondType: f.instrumentType,
+      slrType: f.slrType ?? '',
+      scriptDesc: f.scriptName,
+      glAccountId: Number(f.glAccountId),
+      isin: f.isin ?? '',
+      intRate: f.couponRate ?? null,
+      issueDate: f.issueDate ?? '',
+      maturityDate: f.maturityDate ?? '',
+      companyName: f.companyName ?? '',
+      address1: f.address1 ?? '',
+      address2: f.address2 ?? '',
+      address3: f.address3 ?? '',
+      city: f.city ?? '',
+      pincode: f.pincode ?? '',
+      phone: f.phone ?? '',
+      fax: f.fax ?? '',
+      corpCode: f.corpCode ?? '',
+      dateFormat: 'dd-MM-yyyy',
+      locale: 'en'
+    };
+    const request = f.id ? this.investmentService.updateScript(f.id, body) : this.investmentService.createScript(body);
+    this.saving = true;
+    request.subscribe({
+      next: (res) => {
+        this.saving = false;
+        this.toast(`Script ${res.resourceIdentifier ?? f.scriptCode} ${f.id ? 'updated' : 'saved'}.`);
+        this.scriptForm = {};
+        this.reloadMasters();
+      },
+      error: (err) => {
+        this.saving = false;
+        this.toast(apiErrorMessage(err));
+      }
+    });
+  }
+
+  searchScript(): void {
+    const s = this.scripts.find((x) => x.scriptCode.toUpperCase() === this.scriptSearchCode.trim().toUpperCase());
+    if (!s) {
+      this.toast(`Script Code ${this.scriptSearchCode} not found.`);
+      return;
+    }
+    this.scriptForm = { ...s };
+    this.toast(`Script ${s.scriptCode} loaded.`);
+  }
+
+  cancelScript(): void {
+    this.scriptForm = {};
+    this.scriptSearchCode = '';
   }
 
   addSubType(): void {
@@ -279,46 +466,121 @@ export class InvestmentMastersComponent {
         return one(
           [
             'Party Code',
+            'Bond Type',
             'Party Name',
-            'Type',
-            'PAN No'
+            'Address',
+            'City',
+            'Pincode',
+            'Phone',
+            'Fax',
+            'Bank Type',
+            'GL A/c No',
+            'RBI Code',
+            'Limit',
+            'LEI No',
+            'Counterparty Bank',
+            'Branch',
+            'Account No',
+            'IFSC',
+            'Status'
           ],
           [
             12,
+            14,
             30,
-            16,
-            14
+            36,
+            14,
+            10,
+            14,
+            14,
+            24,
+            12,
+            12,
+            14,
+            22,
+            24,
+            20,
+            18,
+            14,
+            10
           ],
           this.parties.map((p) => [
             p.partyCode,
+            p.bondType ?? '',
             p.partyName,
-            p.partyType,
-            p.panNo
+            [
+              p.address1,
+              p.address2,
+              p.address3
+            ]
+              .filter((x) => !!x)
+              .join(', '),
+            p.city ?? '',
+            p.pincode ?? '',
+            p.phone ?? '',
+            p.fax ?? '',
+            p.bankType ?? '',
+            p.glCode ?? '',
+            p.rbiCode ?? '',
+            p.limit ?? null,
+            p.leiNo ?? '',
+            p.cpBankName ?? '',
+            p.cpBranchName ?? '',
+            p.cpAccountNo ?? '',
+            p.cpIfsc ?? '',
+            p.status ?? 'ACTIVE'
           ])
         );
       case 'script':
         return one(
           [
             'Script Code',
-            'Script Name',
-            'Instrument',
+            'Bond Type',
+            'SLR',
+            'Script Desc',
+            'GL A/c No',
             'ISIN',
-            'Face Value/Unit'
+            'Int Rate %',
+            'Issue Date',
+            'Maturity Date',
+            'Period (Y/M/D)',
+            'Face Value/Unit',
+            'Company Name',
+            'Corp Code'
           ],
           [
+            14,
             16,
+            12,
             30,
+            12,
             16,
-            16,
-            16
+            10,
+            14,
+            14,
+            14,
+            14,
+            24,
+            12
           ],
-          this.scripts.map((s) => [
-            s.scriptCode,
-            s.scriptName,
-            s.instrumentType,
-            s.isin,
-            s.faceValuePerUnit
-          ])
+          this.scripts.map((s) => {
+            const p = periodBetween(s.issueDate, s.maturityDate);
+            return [
+              s.scriptCode,
+              s.instrumentType,
+              s.slrType ?? '',
+              s.scriptName,
+              s.glCode ?? '',
+              s.isin,
+              s.couponRate ?? null,
+              s.issueDate ?? '',
+              s.maturityDate ?? '',
+              s.issueDate && s.maturityDate ? `${p.years}/${p.months}/${p.days}` : '',
+              s.faceValuePerUnit,
+              s.companyName ?? '',
+              s.corpCode ?? ''
+            ];
+          })
         );
       case 'subtype':
         return one(

src/app/investment/investment.service.ts

@@ -0,0 +1,344 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+import { Injectable, inject } from '@angular/core';
+import { HttpClient, HttpErrorResponse } from '@angular/common/http';
+import { Observable, forkJoin } from 'rxjs';
+import { map, tap } from 'rxjs/operators';
+import {
+  InstrumentType,
+  InvestmentHolding,
+  PARTY_MASTER,
+  PartyMaster,
+  SCRIPT_MASTER,
+  ScriptMaster,
+  SlrType
+} from './investment-data';
+
+/** Investment party as returned by /investment/parties. */
+export interface InvestmentPartyDto {
+  id: number;
+  partyCode: string;
+  bondType: InstrumentType;
+  partyName: string;
+  address1?: string;
+  address2?: string;
+  address3?: string;
+  city?: string;
+  pincode?: string;
+  phone?: string;
+  fax?: string;
+  bankType?: string;
+  glAccountId: number;
+  glCode: string;
+  glName: string;
+  rbiCode?: string;
+  limit?: number;
+  leiNo?: string;
+  cpBankName?: string;
+  cpBranchName?: string;
+  cpAccountNo?: string;
+  cpIfsc?: string;
+  active: boolean;
+}
+
+/** Investment script as returned by /investment/scripts (dates are DD-MM-YYYY). */
+export interface InvestmentScriptDto {
+  id: number;
+  scriptCode: string;
+  bondType: InstrumentType;
+  slrType?: SlrType;
+  scriptDesc: string;
+  glAccountId: number;
+  glCode: string;
+  glName: string;
+  isin?: string;
+  faceValuePerUnit: number;
+  intRate?: number;
+  issueDate?: string;
+  maturityDate?: string;
+  companyName?: string;
+  address1?: string;
+  address2?: string;
+  address3?: string;
+  city?: string;
+  pincode?: string;
+  phone?: string;
+  fax?: string;
+  corpCode?: string;
+  active: boolean;
+}
+
+/** Purchase entry (holding) as returned by /investment/purchases (dates are DD-MM-YYYY). */
+export interface InvestmentPurchaseDto {
+  id: number;
+  dealNo: string;
+  certNo: string;
+  bondType: InstrumentType;
+  scriptId: number;
+  scriptCode: string;
+  scriptDesc: string;
+  isin?: string;
+  partyId: number;
+  partyCode: string;
+  partyName: string;
+  dealDate: string;
+  dealTime?: string;
+  settlementType: string;
+  settlementDate: string;
+  faceValue: number;
+  purchaseRate: number;
+  units: number;
+  balanceUnits: number;
+  brokerage?: number;
+  stampDuty?: number;
+  bookValue: number;
+  premiumDiscount?: number;
+  intRate?: number;
+  issueDate?: string;
+  maturityDate?: string;
+  lastIntDate?: string;
+  accruedDays?: number;
+  accruedInterest?: number;
+  settlementAmount: number;
+  ytm?: number;
+  category: string;
+  subType?: string;
+  investmentGlAccountId: number;
+  investmentGlCode: string;
+  investmentGlName: string;
+  crGlAccountId: number;
+  crGlCode: string;
+  crGlName: string;
+  otherDetails?: string;
+  status: string;
+}
+
+export interface InvestmentGlAccount {
+  id: number;
+  glCode: string;
+  name: string;
+}
+
+/**
+ * Backend calls for the Investment masters (Bank / Party Master and Script Master). Results are also copied into the
+ * shared PARTY_MASTER / SCRIPT_MASTER lists so screens that still read those lists (Purchase Entry) offer the saved
+ * masters.
+ */
+@Injectable({ providedIn: 'root' })
+export class InvestmentService {
+  private http = inject(HttpClient);
+
+  // -------------------- Bank / Party Master --------------------
+  getParties(): Observable<InvestmentPartyDto[]> {
+    return this.http.get<InvestmentPartyDto[]>('/investment/parties');
+  }
+
+  createParty(body: object): Observable<{ resourceId: number; resourceIdentifier: string }> {
+    return this.http.post<{ resourceId: number; resourceIdentifier: string }>('/investment/parties', body);
+  }
+
+  updateParty(id: number, body: object): Observable<{ resourceId: number; resourceIdentifier: string }> {
+    return this.http.put<{ resourceId: number; resourceIdentifier: string }>(`/investment/parties/${id}`, body);
+  }
+
+  deleteParty(id: number): Observable<unknown> {
+    return this.http.delete(`/investment/parties/${id}`);
+  }
+
+  // -------------------- Script Master --------------------
+  getScripts(): Observable<InvestmentScriptDto[]> {
+    return this.http.get<InvestmentScriptDto[]>('/investment/scripts');
+  }
+
+  createScript(body: object): Observable<{ resourceId: number; resourceIdentifier: string }> {
+    return this.http.post<{ resourceId: number; resourceIdentifier: string }>('/investment/scripts', body);
+  }
+
+  updateScript(id: number, body: object): Observable<{ resourceId: number; resourceIdentifier: string }> {
+    return this.http.put<{ resourceId: number; resourceIdentifier: string }>(`/investment/scripts/${id}`, body);
+  }
+
+  // -------------------- Purchase Entry --------------------
+  getPurchases(): Observable<InvestmentPurchaseDto[]> {
+    return this.http.get<InvestmentPurchaseDto[]>('/investment/purchases');
+  }
+
+  /** Coupon and 31 Mar / 30 Sep provision lines of a holding up to maturity (calculated, not posted). */
+  getInterestSchedule(purchaseId: number, asOnDate?: string): Observable<InvestmentInterestScheduleDto> {
+    const params = asOnDate ? `?asOnDate=${encodeURIComponent(asOnDate)}` : '';
+    return this.http.get<InvestmentInterestScheduleDto>(
+      `/investment/purchases/${purchaseId}/interest-schedule${params}`
+    );
+  }
+
+  createPurchase(body: object): Observable<{ resourceId: number; resourceIdentifier: string }> {
+    return this.http.post<{ resourceId: number; resourceIdentifier: string }>('/investment/purchases', body);
+  }
+
+  deletePurchase(id: number): Observable<unknown> {
+    return this.http.delete(`/investment/purchases/${id}`);
+  }
+
+  // -------------------- GL accounts --------------------
+  /** Enabled ASSET detail GLs — the only kind an investment party / script can be booked to. */
+  getAssetGlAccounts(): Observable<InvestmentGlAccount[]> {
+    return this.http
+      .get<
+        Array<{ id: number; glCode: string; name: string; disabled: boolean }>
+      >('/glaccounts', { params: { type: '1', usage: '1', disabled: 'false' } })
+      .pipe(
+        map((list) =>
+          list
+            .map((g) => ({ id: g.id, glCode: g.glCode, name: g.name }))
+            .sort((a, b) => a.glCode.localeCompare(b.glCode))
+        )
+      );
+  }
+
+  /** Loads both masters from the backend and refreshes the shared lists other screens read. */
+  syncSharedMasters(): Observable<{ parties: PartyMaster[]; scripts: ScriptMaster[] }> {
+    return forkJoin({ parties: this.getParties(), scripts: this.getScripts() }).pipe(
+      map(({ parties, scripts }) => ({ parties: parties.map(toPartyMaster), scripts: scripts.map(toScriptMaster) })),
+      tap(({ parties, scripts }) => {
+        PARTY_MASTER.splice(0, PARTY_MASTER.length, ...parties);
+        SCRIPT_MASTER.splice(0, SCRIPT_MASTER.length, ...scripts);
+      })
+    );
+  }
+}
+
+export function toPartyMaster(p: InvestmentPartyDto): PartyMaster {
+  return {
+    id: p.id,
+    partyCode: p.partyCode,
+    partyName: p.partyName,
+    partyType: 'BANK',
+    bondType: p.bondType,
+    address1: p.address1,
+    address2: p.address2,
+    address3: p.address3,
+    city: p.city,
+    pincode: p.pincode,
+    phone: p.phone,
+    fax: p.fax,
+    bankType: p.bankType,
+    glAccountId: p.glAccountId,
+    glCode: p.glCode,
+    glName: p.glName,
+    rbiCode: p.rbiCode,
+    limit: p.limit ?? null,
+    leiNo: p.leiNo,
+    cpBankName: p.cpBankName,
+    cpBranchName: p.cpBranchName,
+    cpAccountNo: p.cpAccountNo,
+    cpIfsc: p.cpIfsc,
+    status: p.active ? 'ACTIVE' : 'INACTIVE'
+  };
+}
+
+export function toScriptMaster(s: InvestmentScriptDto): ScriptMaster {
+  return {
+    id: s.id,
+    scriptCode: s.scriptCode,
+    scriptName: s.scriptDesc,
+    instrumentType: s.bondType,
+    isin: s.isin ?? '',
+    faceValuePerUnit: s.faceValuePerUnit,
+    slrType: s.slrType,
+    glAccountId: s.glAccountId,
+    glCode: s.glCode,
+    glName: s.glName,
+    couponRate: s.intRate,
+    issueDate: s.issueDate,
+    maturityDate: s.maturityDate,
+    companyName: s.companyName,
+    address1: s.address1,
+    address2: s.address2,
+    address3: s.address3,
+    city: s.city,
+    pincode: s.pincode,
+    phone: s.phone,
+    fax: s.fax,
+    corpCode: s.corpCode,
+    active: s.active
+  };
+}
+
+/** A saved purchase as a row of the Holdings register. */
+export function toHolding(p: InvestmentPurchaseDto): InvestmentHolding {
+  return {
+    id: p.id,
+    dealNo: p.dealNo,
+    certNo: p.certNo,
+    instrumentType: p.bondType,
+    scriptCode: p.scriptCode,
+    scriptName: p.scriptDesc,
+    party: p.partyName,
+    partyCode: p.partyCode,
+    subType: p.subType ?? '',
+    faceValue: p.faceValue,
+    purchaseRate: p.purchaseRate,
+    units: p.balanceUnits,
+    purchaseDate: p.settlementDate,
+    maturityDate: p.maturityDate || p.dealDate,
+    interestRate: p.intRate ?? 0,
+    interestFreq: p.bondType === 'MUTUAL_FUND' ? 'CUMULATIVE' : 'HALF_YEARLY',
+    glCode: p.investmentGlCode,
+    glName: p.investmentGlName,
+    crToAc: p.crGlCode,
+    brokerCode: '',
+    status: 'ACTIVE',
+    category: p.category,
+    bookValue: p.bookValue,
+    settlementAmount: p.settlementAmount
+  };
+}
+
+/** One line of a holding's interest schedule (see InvestmentInterestScheduleData in the backend). */
+export interface InvestmentInterestRowDto {
+  type: 'COUPON' | 'PROVISION';
+  intDate: string;
+  fromDate: string;
+  toDate: string;
+  days: number;
+  grossInterest: number;
+  alreadyBooked: number;
+  amount: number;
+  due: boolean;
+}
+
+export interface InvestmentInterestScheduleDto {
+  purchaseId: number;
+  dealNo: string;
+  certNo: string;
+  scriptCode: string;
+  scriptDesc: string;
+  faceValue: number;
+  unitValue: number;
+  balanceUnits: number;
+  purchaseRate: number;
+  bookValue: number;
+  intRate: number;
+  dealDate: string;
+  lastIntDate: string;
+  maturityDate: string;
+  purchasedAccruedInterest: number;
+  couponPerHalfYear: number;
+  asOnDate: string;
+  interestGlCode: string;
+  interestGlName: string;
+  rows: InvestmentInterestRowDto[];
+}
+
+/** The first validation / domain-rule message from a Fineract error response, for a toast. */
+export function apiErrorMessage(err: unknown): string {
+  const e = err as HttpErrorResponse;
+  const body = e?.error;
+  return body?.errors?.[0]?.defaultUserMessage || body?.defaultUserMessage || e?.message || 'Request failed.';
+}