/**
 * 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 { Component, OnInit, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule, ReactiveFormsModule, FormBuilder, FormGroup, Validators } from '@angular/forms';
import { MatDialogModule, MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatButtonModule } from '@angular/material/button';
import { MatIconModule } from '@angular/material/icon';

export interface CashierIssueDdDialogData {
  leaflet: any;
  branchName: string;
  sponsorBankName: string;
  faceValue: number;
  chargesAmount: number;
  gstPercentage: number;
  gstAmount: number;
  totalCashPayable: number;
  /**
   * How the draft is being paid for. Cash is a walk-in purchaser the bank may know nothing about,
   * so their name, address and Aadhaar have to be captured here. An account debit is a member whose
   * account is already on screen — those fields are not asked for, and must not be sent, because
   * the identity is the account holder's rather than a walk-in's.
   */
  paymentMethod?: 'CASH' | 'ACCOUNT_DEBIT';
  /** The account being debited, shown so the clerk can see what is funding the draft. */
  accountNo?: string;
  /** The account holder, for the same reason. */
  accountHolderName?: string;
}

@Component({
  selector: 'mifosx-cashier-issue-dd-dialog',
  standalone: true,
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule,
    MatDialogModule,
    MatFormFieldModule,
    MatInputModule,
    MatButtonModule,
    MatIconModule
  ],
  template: `
    <div class="dd-dialog-shell">
      <div class="dd-dialog-header">
        <div class="dd-dialog-header__title">
          <mat-icon class="dd-icon">receipt_long</mat-icon>
          <div>
            <h2>{{ isAccountDebit ? 'Account-Debit Demand Draft (DD)' : 'Walk-in Cash Demand Draft (DD)' }}</h2>
            <p>
              Next available DD leaflet auto-selected ·
              {{ isAccountDebit ? 'Enter beneficiary details' : 'Enter purchaser &amp; beneficiary details' }}
            </p>
          </div>
        </div>
        <button mat-icon-button type="button" (click)="onClose()" class="close-btn">
          <mat-icon>close</mat-icon>
        </button>
      </div>

      <mat-dialog-content class="dd-dialog-body">
        <!-- Draft & Financials Summary Card -->
        <div class="dd-summary-card">
          <div class="summary-col">
            <span class="label">Auto-Selected Leaflet</span>
            <strong class="dd-number-highlight">{{ data.leaflet.ddNumber }}</strong>
            <span class="sublabel">{{ data.sponsorBankName || 'Sponsor Bank' }} · {{ data.branchName }}</span>
          </div>
          <div class="summary-divider"></div>
          <div class="summary-col">
            <span class="label">Face Value</span>
            <strong class="amount">₹{{ data.faceValue | number: '1.2-2' }}</strong>
            <span class="sublabel">+ Charges ₹{{ data.chargesAmount | number: '1.2-2' }}</span>
          </div>
          <div class="summary-divider"></div>
          <div class="summary-col">
            <span class="label">GST ({{ data.gstPercentage }}%)</span>
            <strong class="amount">₹{{ data.gstAmount | number: '1.2-2' }}</strong>
            <span class="sublabel">on charges only</span>
          </div>
          <div class="summary-divider"></div>
          <div class="summary-col highlight-col">
            <span class="label">{{ isAccountDebit ? 'Total Debited' : 'Total Cash Collected' }}</span>
            <strong class="total-amount">₹{{ data.totalCashPayable | number: '1.2-2' }}</strong>
            <span class="sublabel">
              @if (isAccountDebit) {
                {{ data.accountNo || 'Account' }}
              } @else {
                Denominations verified
              }
            </span>
          </div>
        </div>

        <!--
          The account funding the draft, stated before the form.

          A clerk reaching this dialog has an account loaded on the workstation behind it, and the
          debit is irreversible once a checker approves. Naming the account and its holder here is
          what makes a wrong account visible while it can still be cancelled.
        -->
        @if (isAccountDebit) {
          <div class="dd-funding-note">
            <mat-icon>account_balance_wallet</mat-icon>
            <div>
              <strong>Debiting {{ data.accountNo }}</strong>
              @if (data.accountHolderName) {
                · {{ data.accountHolderName }}
              }
              <div class="dd-funding-sub">
                ₹{{ data.totalCashPayable | number: '1.2-2' }} will be debited from this account when a checker
                approves. No cash is taken at the counter.
              </div>
            </div>
          </div>
        }

        <form [formGroup]="form" class="dd-form">
          <!--
            Purchaser identity is asked for only when the bank has none: a walk-in paying cash. On an
            account debit the purchaser IS the account holder, already identified and KYC'd, and
            re-capturing a name and Aadhaar here would invite a mismatch against the account on record.
          -->
          @if (!isAccountDebit) {
            <div class="form-section-title">Walk-in Purchaser Details</div>

            <div class="form-row">
              <mat-form-field appearance="outline" class="form-field-flex">
                <mat-label>Walk-in Purchaser Name *</mat-label>
                <input
                  matInput
                  formControlName="walkinPurchaserName"
                  placeholder="e.g. RAMESH CHANDRA"
                  style="text-transform: uppercase;"
                />
                <mat-error *ngIf="form.get('walkinPurchaserName')?.hasError('required')"
                  >Purchaser name is required</mat-error
                >
                <mat-error *ngIf="form.get('walkinPurchaserName')?.hasError('minlength')"
                  >Must be at least 3 characters</mat-error
                >
              </mat-form-field>

              <mat-form-field appearance="outline" class="form-field-flex">
                <mat-label>12-Digit Aadhaar Number *</mat-label>
                <input
                  matInput
                  formControlName="walkinPurchaserAadhaar"
                  placeholder="12-digit Aadhaar"
                  maxlength="12"
                />
                <mat-hint>Masked to last 4 digits before storage</mat-hint>
                <mat-error *ngIf="form.get('walkinPurchaserAadhaar')?.hasError('required')"
                  >Aadhaar number is required</mat-error
                >
                <mat-error *ngIf="form.get('walkinPurchaserAadhaar')?.hasError('pattern')"
                  >Must be exactly 12 numeric digits</mat-error
                >
              </mat-form-field>
            </div>

            <mat-form-field appearance="outline" class="full-width">
              <mat-label>Purchaser Address / Location *</mat-label>
              <input
                matInput
                formControlName="walkinPurchaserAddress"
                placeholder="e.g. 14, SECTOR 5, MAIN ROAD, MUMBAI"
                style="text-transform: uppercase;"
              />
              <mat-error *ngIf="form.get('walkinPurchaserAddress')?.hasError('required')"
                >Address is required</mat-error
              >
            </mat-form-field>
          }

          <!-- Beneficiary Section -->
          <div class="form-section-title">Beneficiary & Payment Details</div>

          <mat-form-field appearance="outline" class="full-width">
            <mat-label>Beneficiary Name (In Favour Of) *</mat-label>
            <input
              matInput
              formControlName="beneficiaryName"
              placeholder="e.g. UNIVERSITY OF MUMBAI"
              maxlength="120"
              style="text-transform: uppercase;"
            />
            <mat-error *ngIf="form.get('beneficiaryName')?.hasError('required')"
              >Beneficiary name is required</mat-error
            >
            <mat-error *ngIf="form.get('beneficiaryName')?.hasError('maxlength')">Max 120 characters</mat-error>
          </mat-form-field>

          <div class="form-row">
            <mat-form-field appearance="outline" class="form-field-flex">
              <mat-label>Payable At - Branch *</mat-label>
              <input
                matInput
                formControlName="payableAtBranch"
                placeholder="e.g. FORT BRANCH"
                maxlength="150"
                style="text-transform: uppercase;"
              />
              <mat-error *ngIf="form.get('payableAtBranch')?.hasError('required')"
                >Payable Branch is required</mat-error
              >
            </mat-form-field>

            <mat-form-field appearance="outline" class="form-field-flex">
              <mat-label>Payable At - City *</mat-label>
              <input
                matInput
                formControlName="payableAtCity"
                placeholder="e.g. MUMBAI"
                maxlength="100"
                style="text-transform: uppercase;"
              />
              <mat-error *ngIf="form.get('payableAtCity')?.hasError('required')">Payable City is required</mat-error>
            </mat-form-field>
          </div>
        </form>
      </mat-dialog-content>

      <mat-dialog-actions class="dd-dialog-actions" align="end">
        <button mat-button type="button" (click)="onClose()">Cancel</button>
        <button mat-flat-button color="primary" [disabled]="form.invalid" (click)="onSubmit()">
          Submit for Manager Approval
        </button>
      </mat-dialog-actions>
    </div>
  `,
  styles: [
    `
      .dd-dialog-shell {
        display: flex;
        flex-direction: column;
        max-height: 90vh;
      }
      .dd-dialog-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 24px;
        background: #0f172a;
        color: #ffffff;
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
      }
      .dd-dialog-header__title {
        display: flex;
        align-items: center;
        gap: 12px;
      }
      .dd-dialog-header__title h2 {
        margin: 0;
        font-size: 18px;
        font-weight: 600;
        color: #ffffff;
      }
      .dd-dialog-header__title p {
        margin: 2px 0 0 0;
        font-size: 12px;
        color: #94a3b8;
      }
      .dd-icon {
        color: #38bdf8;
        font-size: 28px;
        width: 28px;
        height: 28px;
      }
      .close-btn {
        color: #94a3b8;
      }
      .close-btn:hover {
        color: #ffffff;
      }
      .dd-dialog-body {
        padding: 20px 24px;
        overflow-y: auto;
      }
      .dd-summary-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        border-radius: 8px;
        padding: 14px 18px;
        margin-bottom: 20px;
      }
      .summary-col {
        display: flex;
        flex-direction: column;
        gap: 2px;
      }
      .summary-col.highlight-col {
        background: #ecfdf5;
        padding: 6px 12px;
        border-radius: 6px;
        border: 1px solid #a7f3d0;
      }
      .summary-divider {
        width: 1px;
        height: 36px;
        background: #e2e8f0;
      }
      .summary-col .label {
        font-size: 11px;
        text-transform: uppercase;
        color: #64748b;
        font-weight: 600;
      }
      .dd-number-highlight {
        font-size: 16px;
        color: #0369a1;
        font-family: monospace;
      }
      .summary-col .amount {
        font-size: 15px;
        color: #1e293b;
      }
      .summary-col .total-amount {
        font-size: 16px;
        color: #065f46;
      }
      .summary-col .sublabel {
        font-size: 11px;
        color: #94a3b8;
      }
      .form-section-title {
        font-size: 13px;
        font-weight: 600;
        text-transform: uppercase;
        color: #475569;
        margin: 16px 0 10px 0;
        border-bottom: 1px solid #f1f5f9;
        padding-bottom: 4px;
      }
      .form-section-title:first-child {
        margin-top: 0;
      }
      .dd-form {
        display: flex;
        flex-direction: column;
        gap: 8px;
      }
      .full-width {
        width: 100%;
      }
      .form-row {
        display: flex;
        gap: 16px;
      }
      .form-field-flex {
        flex: 1;
      }
      .dd-dialog-actions {
        padding: 12px 24px;
        border-top: 1px solid #e2e8f0;
      }
      /* The account about to be debited — read before the form, so a wrong one is caught here. */
      .dd-funding-note {
        display: flex;
        gap: 10px;
        align-items: flex-start;
        margin: 14px 0 4px;
        padding: 11px 14px;
        background: #eff6ff;
        border: 1px solid #bfdbfe;
        border-left: 3px solid #1d4ed8;
        border-radius: 6px;
        font-size: 13px;
        color: #334155;
      }
      .dd-funding-note mat-icon {
        color: #1d4ed8;
        flex-shrink: 0;
      }
      .dd-funding-sub {
        margin-top: 3px;
        font-size: 11.5px;
        line-height: 1.5;
        color: #64748b;
      }
    `
  ]
})
export class CashierIssueDdDialogComponent implements OnInit {
  private fb = inject(FormBuilder);
  private dialogRef = inject(MatDialogRef<CashierIssueDdDialogComponent>);
  public data: CashierIssueDdDialogData = inject(MAT_DIALOG_DATA);

  form!: FormGroup;

  /** Whether the draft is funded by debiting a member's account rather than by cash at the counter. */
  get isAccountDebit(): boolean {
    return this.data.paymentMethod === 'ACCOUNT_DEBIT';
  }

  ngOnInit(): void {
    // Walk-in identity is required for cash and rejected outright for an account debit — the server
    // refuses a walk-in name alongside an account — so the controls are only built when they apply.
    // Registering them unconditionally and merely hiding them would hold the form invalid on a
    // required field the clerk cannot see.
    this.form = this.fb.group(
      this.isAccountDebit
        ? {
            beneficiaryName: [
              '',
              [
                Validators.required,
                Validators.maxLength(120)
              ]
            ],
            payableAtBranch: [
              '',
              [Validators.required]
            ],
            payableAtCity: [
              '',
              [Validators.required]
            ]
          }
        : {
            walkinPurchaserName: [
              '',
              [
                Validators.required,
                Validators.minLength(3)
              ]
            ],
            walkinPurchaserAddress: [
              '',
              [Validators.required]
            ],
            walkinPurchaserAadhaar: [
              '',
              [
                Validators.required,
                Validators.pattern(/^[0-9]{12}$/)
              ]
            ],
            beneficiaryName: [
              '',
              [
                Validators.required,
                Validators.maxLength(120)
              ]
            ],
            payableAtBranch: [
              '',
              [Validators.required]
            ],
            payableAtCity: [
              '',
              [Validators.required]
            ]
          }
    );
  }

  onClose(): void {
    this.dialogRef.close();
  }

  onSubmit(): void {
    if (this.form.invalid) return;
    const val = this.form.value;
    const beneficiary = {
      beneficiaryName: (val.beneficiaryName || '').trim().toUpperCase(),
      payableAtBranch: (val.payableAtBranch || '').trim().toUpperCase(),
      payableAtCity: (val.payableAtCity || '').trim().toUpperCase()
    };
    // Walk-in fields are left off entirely on an account debit rather than sent empty: the server
    // rejects a purchaser name arriving alongside an account, and '' would be sent as one.
    this.dialogRef.close(
      this.isAccountDebit
        ? beneficiary
        : {
            walkinPurchaserName: (val.walkinPurchaserName || '').trim().toUpperCase(),
            walkinPurchaserAddress: (val.walkinPurchaserAddress || '').trim().toUpperCase(),
            walkinPurchaserAadhaar: (val.walkinPurchaserAadhaar || '').trim(),
            ...beneficiary
          }
    );
  }
}