/**
 * 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, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { AuthenticationService } from '../../core/authentication/authentication.service';
import { ExportSheetSpec, exportWorkbook } from '../cashier-export';

interface SummaryRow {
  code: string;
  name: string;
  /** Balance carried forward as of the start of the day — the only figure NOT derived from txns below. */
  opening: number;
}

interface TxnRow {
  /** Links this transaction to the SummaryRow.code it posts against — the single source of truth for Credit/Debit totals. */
  glCode: string;
  voucherNo: string;
  accountNo: string;
  accountName: string;
  particulars: string;
  debit: number;
  credit: number;
}

interface Branch {
  code: string;
  name: string;
  /** Relative size vs the base dataset below (which represents the Head Office main branch, scale 1). */
  scale: number;
  /** Numeric offset used to derive this branch's own account numbers / IFSC serials — keeps the
   *  standard 12-digit / IFSC format intact instead of just tagging a prefix onto Branch 1's values. */
  acctShift: number;
}

type TabKey = 'cash' | 'transfer' | 'clearing' | 'digital';

/**
 * Dummy static Cash / Clearing / Transfer summary + transaction-detail report.
 *
 * IMPORTANT: Credit/Debit (and therefore Closing) are always DERIVED from the txn
 * lists below (rowCredit/rowDebit), never hand-entered separately — this guarantees
 * the Summary view and the Transaction Details view can never go out of sync,
 * for any branch or for the Head Office's "All Branches" consolidated view.
 */
@Component({
  selector: 'mifosx-cash-clearing-transfer-summary',
  templateUrl: './cash-clearing-transfer-summary.component.html',
  styleUrls: [
    '../cashier-shared.scss',
    './cash-clearing-transfer-summary.component.scss'
  ],
  standalone: true,
  imports: [
    CommonModule,
    FormsModule
  ]
})
export class CashClearingTransferSummaryComponent {
  private auth = inject(AuthenticationService);

  asOnDate = '';
  activeTab: TabKey = 'cash';
  showDetails = false;
  /** GL/channel filter for the Transaction Details view — null means "All". */
  glFilter: string | null = null;
  /** True while an Export to Excel workbook is being built — disables the button to prevent double-clicks. */
  generating = false;

  private readonly tabLabels: Record<TabKey, string> = {
    cash: 'Cash',
    transfer: 'Transfer',
    clearing: 'Clearing',
    digital: 'Digital'
  };

  /** True when the logged-in user belongs to the Head Office (sees both branches + consolidated view). */
  isHeadOffice = false;
  /** The logged-in user's own branch/office name, from real session credentials. */
  currentOfficeName = 'Branch Office';
  /** Set when a branch-level login's officeName matches one of the two dummy branches below. */
  private ownBranch: Branch | null = null;

  /**
   * The two branches this demo covers. A branch-level user is matched to one of these by
   * their real officeName (case-insensitive substring match) so "Branch 1" logging in sees
   * Branch 1's figures and "Branch 2" sees Branch 2's — rename these to your real office
   * names if they differ. Both are proportionally scaled from the same base dataset so
   * every branch's own numbers stay internally consistent (Summary always equals the sum
   * of its own Transaction Details).
   */
  branches: Branch[] = [
    { code: 'BR1', name: 'Branch 1', scale: 1, acctShift: 0 },
    { code: 'BR2', name: 'Branch 2', scale: 0.7, acctShift: 400 }
  ];

  /** 'ALL' = consolidated across both branches; otherwise a Branch.code. Only meaningful for Head Office users. */
  selectedBranchCode = 'ALL';

  cashRows: SummaryRow[] = [{ code: '100001', name: 'Cash at Vault', opening: 3572000 }];

  transferRows: SummaryRow[] = [
    { code: '250101', name: 'Suspense Account - Transfer', opening: 85000 },
    { code: '250102', name: 'Sundry Deposit Account', opening: 132500 },
    { code: '250103', name: 'Inter Branch Account (Head Office)', opening: 610000 },
    { code: '250104', name: 'Inward Remittance Suspense', opening: 42000 },
    { code: '250105', name: 'Outward Remittance Suspense', opening: 38500 },
    { code: '251001', name: 'Bank GL - SBI Current Account', opening: 1850000 },
    { code: '251002', name: 'Bank GL - HDFC Bank Current Account', opening: 960000 },
    { code: '251003', name: 'Bank GL - ICICI Bank Current Account', opening: 745000 },
    { code: '251004', name: 'Bank GL - Axis Bank Current Account', opening: 512000 },
    { code: '252001', name: 'DD Payable Account', opening: 96000 },
    { code: '252002', name: 'Pay Order Payable Account', opening: 64000 },
    { code: '253001', name: 'Sundry Creditors', opening: 158000 },
    { code: '253002', name: 'Sundry Debtors', opening: 121000 },
    { code: '254001', name: 'TDS Payable Account', opening: 28500 },
    { code: '254002', name: 'GST Payable Account', opening: 19500 }
  ];

  clearingRows: SummaryRow[] = [
    { code: '300201', name: 'Outward Clearing (Cheques Sent)', opening: 265000 },
    { code: '300202', name: 'Inward Clearing (Cheques Received)', opening: 198000 },
    { code: '300203', name: 'Clearing Suspense Account', opening: 15500 },
    { code: '300204', name: 'CTS Clearing Difference Account', opening: 4200 },
    { code: '300205', name: 'Local Clearing House Account', opening: 88000 }
  ];

  digitalRows: SummaryRow[] = [
    { code: 'RTGS', name: 'RTGS - Overall', opening: 720000 },
    { code: 'NEFT', name: 'NEFT - Overall', opening: 512000 },
    { code: 'UPI', name: 'UPI - Overall', opening: 96000 },
    { code: 'ATM', name: 'ATM - Overall', opening: 340000 },
    { code: 'NACH', name: 'NACH - Overall', opening: 158000 }
  ];

  cashTxns: TxnRow[] = [
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0141',
      accountNo: 'TIL-0001',
      accountName: 'Teller Counter 1 Cash Deposits (Aggregated)',
      particulars: 'Cash Deposit - Savings/Current Accounts',
      debit: 0,
      credit: 950000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0142',
      accountNo: 'TIL-0002',
      accountName: 'Teller Counter 2 Cash Deposits (Aggregated)',
      particulars: 'Cash Deposit - Savings/Current Accounts',
      debit: 0,
      credit: 700000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0143',
      accountNo: '015020198765',
      accountName: 'Anita Traders',
      particulars: 'Cash Deposit - Current Account',
      debit: 0,
      credit: 185000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0144',
      accountNo: '015010112345',
      accountName: 'Ramesh Kumar Sahu',
      particulars: 'Cash Deposit - Savings Account',
      debit: 0,
      credit: 25000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0145',
      accountNo: '015020209988',
      accountName: 'Kavita Enterprises',
      particulars: 'Cash Deposit - Current Account',
      debit: 0,
      credit: 110000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0146',
      accountNo: 'ATM-0001',
      accountName: 'ATM Excess Cash Retraction',
      particulars: 'Excess Cash Surrendered by ATM to Vault',
      debit: 0,
      credit: 400000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0147',
      accountNo: '015010223344',
      accountName: 'Suresh Yadav',
      particulars: 'Cash Deposit - Savings Account',
      debit: 0,
      credit: 15000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0148',
      accountNo: '015030112233',
      accountName: 'Kiran Bhosale',
      particulars: 'Cash Deposit - RD Installment',
      debit: 0,
      credit: 130000
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0149',
      accountNo: 'ATM-0001',
      accountName: 'ATM 1 Cash Loading',
      particulars: 'Vault to ATM Cash Transfer',
      debit: 700000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0150',
      accountNo: 'ATM-0002',
      accountName: 'ATM 2 Cash Loading',
      particulars: 'Vault to ATM Cash Transfer',
      debit: 500000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0151',
      accountNo: '015010154321',
      accountName: 'Sunita Devi',
      particulars: 'Cash Withdrawal - Savings Account',
      debit: 12000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0152',
      accountNo: '015010167890',
      accountName: 'Mohan Lal Verma',
      particulars: 'Cash Withdrawal - Term Deposit Closure',
      debit: 75000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0153',
      accountNo: 'CCH-0001',
      accountName: 'Currency Chest Remittance',
      particulars: 'Surplus Cash Remitted to Currency Chest',
      debit: 400000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0154',
      accountNo: '015020278899',
      accountName: 'Prakash Jadhav',
      particulars: 'Cash Withdrawal - Current Account',
      debit: 210000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0155',
      accountNo: '015010289900',
      accountName: 'Snehal Kulkarni',
      particulars: 'Cash Withdrawal - Savings Account',
      debit: 18000,
      credit: 0
    },
    {
      glCode: '100001',
      voucherNo: 'CSH/2607/0156',
      accountNo: 'VLT-0001',
      accountName: 'Vault Denomination Exchange Adjustment',
      particulars: 'Shortage Adjustment - Denomination Exchange',
      debit: 205000,
      credit: 0
    }
  ];

  transferTxns: TxnRow[] = [
    // 250101 - Suspense Account - Transfer (credit 420000 / debit 398000)
    {
      glCode: '250101',
      voucherNo: 'TRF/2607/0101',
      accountNo: '015020145678',
      accountName: 'Vikram Traders',
      particulars: 'Suspense Recovered - Vikram Traders',
      debit: 0,
      credit: 250000
    },
    {
      glCode: '250101',
      voucherNo: 'TRF/2607/0102',
      accountNo: '015020145991',
      accountName: 'Rohit Sharma',
      particulars: 'Suspense Recovered - Rohit Sharma',
      debit: 0,
      credit: 170000
    },
    {
      glCode: '250101',
      voucherNo: 'TRF/2607/0103',
      accountNo: '015020156432',
      accountName: 'Meena Enterprises',
      particulars: 'Suspense Adjustment - Meena Enterprises',
      debit: 230000,
      credit: 0
    },
    {
      glCode: '250101',
      voucherNo: 'TRF/2607/0104',
      accountNo: '015020156877',
      accountName: 'Kavita Singh',
      particulars: 'Suspense Adjustment - Kavita Singh',
      debit: 168000,
      credit: 0
    },
    // 250102 - Sundry Deposit Account (credit 96000 / debit 110000)
    {
      glCode: '250102',
      voucherNo: 'TRF/2607/0105',
      accountNo: '015020167531',
      accountName: 'Ashok Furnitures',
      particulars: 'Sundry Deposit Received - Ashok Furnitures',
      debit: 0,
      credit: 60000
    },
    {
      glCode: '250102',
      voucherNo: 'TRF/2607/0106',
      accountNo: '015020167998',
      accountName: 'Ganesh Traders',
      particulars: 'Sundry Deposit Received - Ganesh Traders',
      debit: 0,
      credit: 36000
    },
    {
      glCode: '250102',
      voucherNo: 'TRF/2607/0107',
      accountNo: '015020178654',
      accountName: 'Geeta Boutique',
      particulars: 'Sundry Deposit Refunded - Geeta Boutique',
      debit: 70000,
      credit: 0
    },
    {
      glCode: '250102',
      voucherNo: 'TRF/2607/0108',
      accountNo: '015020178901',
      accountName: 'Manisha Enterprises',
      particulars: 'Sundry Deposit Refunded - Manisha Enterprises',
      debit: 40000,
      credit: 0
    },
    // 250103 - Inter Branch Account, Head Office (credit 1250000 / debit 1180000)
    {
      glCode: '250103',
      voucherNo: 'TRF/2607/0109',
      accountNo: 'BR-0007',
      accountName: 'Andheri Branch (Branch Code 0007)',
      particulars: 'Funds Received from Andheri Branch',
      debit: 0,
      credit: 750000
    },
    {
      glCode: '250103',
      voucherNo: 'TRF/2607/0110',
      accountNo: 'BR-0015',
      accountName: 'Dadar Branch (Branch Code 0015)',
      particulars: 'Funds Received from Dadar Branch',
      debit: 0,
      credit: 500000
    },
    {
      glCode: '250103',
      voucherNo: 'TRF/2607/0111',
      accountNo: 'BR-0012',
      accountName: 'Powai Branch (Branch Code 0012)',
      particulars: 'Fund Transfer to Powai Branch',
      debit: 680000,
      credit: 0
    },
    {
      glCode: '250103',
      voucherNo: 'TRF/2607/0112',
      accountNo: 'BR-0019',
      accountName: 'Thane Branch (Branch Code 0019)',
      particulars: 'Fund Transfer to Thane Branch',
      debit: 500000,
      credit: 0
    },
    // 250104 - Inward Remittance Suspense (credit 315000 / debit 300000)
    {
      glCode: '250104',
      voucherNo: 'TRF/2607/0113',
      accountNo: '015020189712',
      accountName: 'Suresh Patil',
      particulars: 'Inward Remittance Received - Suresh Patil',
      debit: 0,
      credit: 190000
    },
    {
      glCode: '250104',
      voucherNo: 'TRF/2607/0114',
      accountNo: '015020189834',
      accountName: 'Rahul Deshmukh',
      particulars: 'Inward Remittance Received - Rahul Deshmukh',
      debit: 0,
      credit: 125000
    },
    {
      glCode: '250104',
      voucherNo: 'TRF/2607/0115',
      accountNo: '015020190845',
      accountName: 'Lata Joshi',
      particulars: 'Inward Remittance Credited - Lata Joshi',
      debit: 175000,
      credit: 0
    },
    {
      glCode: '250104',
      voucherNo: 'TRF/2607/0116',
      accountNo: '015020190956',
      accountName: 'Farhan Sheikh',
      particulars: 'Inward Remittance Credited - Farhan Sheikh',
      debit: 125000,
      credit: 0
    },
    // 250105 - Outward Remittance Suspense (credit 275000 / debit 260000)
    {
      glCode: '250105',
      voucherNo: 'TRF/2607/0117',
      accountNo: '015020201456',
      accountName: 'Anil Kapoor Traders',
      particulars: 'Outward Remittance Booked - Anil Kapoor Traders',
      debit: 0,
      credit: 160000
    },
    {
      glCode: '250105',
      voucherNo: 'TRF/2607/0118',
      accountNo: '015020201567',
      accountName: 'Sameer Qureshi',
      particulars: 'Outward Remittance Booked - Sameer Qureshi',
      debit: 0,
      credit: 115000
    },
    {
      glCode: '250105',
      voucherNo: 'TRF/2607/0119',
      accountNo: '015020212789',
      accountName: 'Deepa Enterprises',
      particulars: 'Outward Remittance Settled - Deepa Enterprises',
      debit: 150000,
      credit: 0
    },
    {
      glCode: '250105',
      voucherNo: 'TRF/2607/0120',
      accountNo: '015020212890',
      accountName: 'Yogesh Pawar',
      particulars: 'Outward Remittance Settled - Yogesh Pawar',
      debit: 110000,
      credit: 0
    },
    // 251001 - Bank GL - SBI Current Account (credit 3250000 / debit 2980000)
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0121',
      accountNo: 'SBIN0001234',
      accountName: 'SBI Mumbai Main Branch',
      particulars: 'Inward Settlement via SBI Current A/c',
      debit: 0,
      credit: 1500000
    },
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0122',
      accountNo: 'SBIN0002211',
      accountName: 'SBI Andheri Branch',
      particulars: 'Inward Settlement via SBI Current A/c',
      debit: 0,
      credit: 1000000
    },
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0123',
      accountNo: 'SBIN0003322',
      accountName: 'SBI Thane Branch',
      particulars: 'Inward Settlement via SBI Current A/c',
      debit: 0,
      credit: 750000
    },
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0124',
      accountNo: 'SBIN0005678',
      accountName: 'SBI Pune Branch',
      particulars: 'Outward Settlement via SBI Current A/c',
      debit: 1400000,
      credit: 0
    },
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0125',
      accountNo: 'SBIN0006689',
      accountName: 'SBI Nashik Branch',
      particulars: 'Outward Settlement via SBI Current A/c',
      debit: 900000,
      credit: 0
    },
    {
      glCode: '251001',
      voucherNo: 'TRF/2607/0126',
      accountNo: 'SBIN0007790',
      accountName: 'SBI Nagpur Branch',
      particulars: 'Outward Settlement via SBI Current A/c',
      debit: 680000,
      credit: 0
    },
    // 251002 - Bank GL - HDFC Bank Current Account (credit 1840000 / debit 1725000)
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0127',
      accountNo: 'HDFC0002345',
      accountName: 'HDFC Bank Andheri Branch',
      particulars: 'Inward Settlement via HDFC Current A/c',
      debit: 0,
      credit: 900000
    },
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0128',
      accountNo: 'HDFC0003456',
      accountName: 'HDFC Bank Bandra Branch',
      particulars: 'Inward Settlement via HDFC Current A/c',
      debit: 0,
      credit: 600000
    },
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0129',
      accountNo: 'HDFC0004567',
      accountName: 'HDFC Bank Malad Branch',
      particulars: 'Inward Settlement via HDFC Current A/c',
      debit: 0,
      credit: 340000
    },
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0130',
      accountNo: 'HDFC0006789',
      accountName: 'HDFC Bank Borivali Branch',
      particulars: 'Outward Settlement via HDFC Current A/c',
      debit: 800000,
      credit: 0
    },
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0131',
      accountNo: 'HDFC0007890',
      accountName: 'HDFC Bank Goregaon Branch',
      particulars: 'Outward Settlement via HDFC Current A/c',
      debit: 600000,
      credit: 0
    },
    {
      glCode: '251002',
      voucherNo: 'TRF/2607/0132',
      accountNo: 'HDFC0008901',
      accountName: 'HDFC Bank Kandivali Branch',
      particulars: 'Outward Settlement via HDFC Current A/c',
      debit: 325000,
      credit: 0
    },
    // 251003 - Bank GL - ICICI Bank Current Account (credit 1420000 / debit 1360000)
    {
      glCode: '251003',
      voucherNo: 'TRF/2607/0133',
      accountNo: 'ICIC0003456',
      accountName: 'ICICI Bank Thane Branch',
      particulars: 'Inward Settlement via ICICI Current A/c',
      debit: 0,
      credit: 820000
    },
    {
      glCode: '251003',
      voucherNo: 'TRF/2607/0134',
      accountNo: 'ICIC0004567',
      accountName: 'ICICI Bank Ghatkopar Branch',
      particulars: 'Inward Settlement via ICICI Current A/c',
      debit: 0,
      credit: 600000
    },
    {
      glCode: '251003',
      voucherNo: 'TRF/2607/0135',
      accountNo: 'ICIC0007890',
      accountName: 'ICICI Bank Vashi Branch',
      particulars: 'Outward Settlement via ICICI Current A/c',
      debit: 760000,
      credit: 0
    },
    {
      glCode: '251003',
      voucherNo: 'TRF/2607/0136',
      accountNo: 'ICIC0008901',
      accountName: 'ICICI Bank Chembur Branch',
      particulars: 'Outward Settlement via ICICI Current A/c',
      debit: 600000,
      credit: 0
    },
    // 251004 - Bank GL - Axis Bank Current Account (credit 980000 / debit 905000)
    {
      glCode: '251004',
      voucherNo: 'TRF/2607/0137',
      accountNo: 'UTIB0004567',
      accountName: 'Axis Bank Dadar Branch',
      particulars: 'Inward Settlement via Axis Current A/c',
      debit: 0,
      credit: 560000
    },
    {
      glCode: '251004',
      voucherNo: 'TRF/2607/0138',
      accountNo: 'UTIB0005678',
      accountName: 'Axis Bank Sion Branch',
      particulars: 'Inward Settlement via Axis Current A/c',
      debit: 0,
      credit: 420000
    },
    {
      glCode: '251004',
      voucherNo: 'TRF/2607/0139',
      accountNo: 'UTIB0008901',
      accountName: 'Axis Bank Kurla Branch',
      particulars: 'Outward Settlement via Axis Current A/c',
      debit: 505000,
      credit: 0
    },
    {
      glCode: '251004',
      voucherNo: 'TRF/2607/0140',
      accountNo: 'UTIB0009012',
      accountName: 'Axis Bank Ghansoli Branch',
      particulars: 'Outward Settlement via Axis Current A/c',
      debit: 400000,
      credit: 0
    },
    // 252001 - DD Payable Account (credit 240000 / debit 218000)
    {
      glCode: '252001',
      voucherNo: 'TRF/2607/0141',
      accountNo: 'DD/2607/5541',
      accountName: 'Sanjay Mehta',
      particulars: 'Demand Draft Issued - Sanjay Mehta',
      debit: 0,
      credit: 140000
    },
    {
      glCode: '252001',
      voucherNo: 'TRF/2607/0142',
      accountNo: 'DD/2607/5556',
      accountName: 'Farida Sheikh',
      particulars: 'Demand Draft Issued - Farida Sheikh',
      debit: 0,
      credit: 100000
    },
    {
      glCode: '252001',
      voucherNo: 'TRF/2607/0143',
      accountNo: 'DD/2607/5498',
      accountName: 'Rekha Nair',
      particulars: 'Demand Draft Paid - Rekha Nair',
      debit: 128000,
      credit: 0
    },
    {
      glCode: '252001',
      voucherNo: 'TRF/2607/0144',
      accountNo: 'DD/2607/5487',
      accountName: 'Girish Rao',
      particulars: 'Demand Draft Paid - Girish Rao',
      debit: 90000,
      credit: 0
    },
    // 252002 - Pay Order Payable Account (credit 175000 / debit 160000)
    {
      glCode: '252002',
      voucherNo: 'TRF/2607/0145',
      accountNo: 'PO/2607/1187',
      accountName: 'Arvind Traders',
      particulars: 'Pay Order Issued - Arvind Traders',
      debit: 0,
      credit: 100000
    },
    {
      glCode: '252002',
      voucherNo: 'TRF/2607/0146',
      accountNo: 'PO/2607/1192',
      accountName: 'Neelam Gupta',
      particulars: 'Pay Order Issued - Neelam Gupta',
      debit: 0,
      credit: 75000
    },
    {
      glCode: '252002',
      voucherNo: 'TRF/2607/0147',
      accountNo: 'PO/2607/1145',
      accountName: 'Vandana Enterprises',
      particulars: 'Pay Order Paid - Vandana Enterprises',
      debit: 95000,
      credit: 0
    },
    {
      glCode: '252002',
      voucherNo: 'TRF/2607/0148',
      accountNo: 'PO/2607/1138',
      accountName: 'Tushar Bhatt',
      particulars: 'Pay Order Paid - Tushar Bhatt',
      debit: 65000,
      credit: 0
    },
    // 253001 - Sundry Creditors (credit 92000 / debit 85000)
    {
      glCode: '253001',
      voucherNo: 'TRF/2607/0149',
      accountNo: '015020223412',
      accountName: 'Om Stationery Suppliers',
      particulars: 'Vendor Bill Provided For - Om Stationery Suppliers',
      debit: 0,
      credit: 52000
    },
    {
      glCode: '253001',
      voucherNo: 'TRF/2607/0150',
      accountNo: '015020223567',
      accountName: 'Shubham Printers',
      particulars: 'Vendor Bill Provided For - Shubham Printers',
      debit: 0,
      credit: 40000
    },
    {
      glCode: '253001',
      voucherNo: 'TRF/2607/0151',
      accountNo: '015020234598',
      accountName: 'Shree Balaji AMC Services',
      particulars: 'Vendor Payment - AMC Charges',
      debit: 50000,
      credit: 0
    },
    {
      glCode: '253001',
      voucherNo: 'TRF/2607/0152',
      accountNo: '015020234678',
      accountName: 'Metro Security Services',
      particulars: 'Vendor Payment - Security Services',
      debit: 35000,
      credit: 0
    },
    // 253002 - Sundry Debtors (credit 68000 / debit 74000)
    {
      glCode: '253002',
      voucherNo: 'TRF/2607/0153',
      accountNo: '015020245671',
      accountName: 'Kiran Hardware',
      particulars: 'Recovery from Sundry Debtor - Kiran Hardware',
      debit: 0,
      credit: 40000
    },
    {
      glCode: '253002',
      voucherNo: 'TRF/2607/0154',
      accountNo: '015020245789',
      accountName: 'Vishal Electronics',
      particulars: 'Recovery from Sundry Debtor - Vishal Electronics',
      debit: 0,
      credit: 28000
    },
    {
      glCode: '253002',
      voucherNo: 'TRF/2607/0155',
      accountNo: '015020256784',
      accountName: 'Nilesh Electricals',
      particulars: 'Advance Given to Sundry Debtor - Nilesh Electricals',
      debit: 44000,
      credit: 0
    },
    {
      glCode: '253002',
      voucherNo: 'TRF/2607/0156',
      accountNo: '015020256890',
      accountName: 'Ramdas Plumbing Works',
      particulars: 'Advance Given to Sundry Debtor - Ramdas Plumbing Works',
      debit: 30000,
      credit: 0
    },
    // 254001 - TDS Payable Account (credit 46000 / debit 40000)
    {
      glCode: '254001',
      voucherNo: 'TRF/2607/0157',
      accountNo: 'TDS/2607/9911',
      accountName: 'TDS on FD Interest Payouts',
      particulars: 'TDS Deducted on FD Interest Payouts',
      debit: 0,
      credit: 28000
    },
    {
      glCode: '254001',
      voucherNo: 'TRF/2607/0158',
      accountNo: 'TDS/2607/9917',
      accountName: 'TDS on RD Interest Payouts',
      particulars: 'TDS Deducted on RD Interest Payouts',
      debit: 0,
      credit: 18000
    },
    {
      glCode: '254001',
      voucherNo: 'TRF/2607/0159',
      accountNo: 'TDS/2607/9902',
      accountName: 'Income Tax Department',
      particulars: 'TDS Remitted to Government - Quarterly Challan',
      debit: 24000,
      credit: 0
    },
    {
      glCode: '254001',
      voucherNo: 'TRF/2607/0160',
      accountNo: 'TDS/2607/9903',
      accountName: 'Income Tax Department',
      particulars: 'TDS Remitted to Government - Adjustment Challan',
      debit: 16000,
      credit: 0
    },
    // 254002 - GST Payable Account (credit 38000 / debit 32000)
    {
      glCode: '254002',
      voucherNo: 'TRF/2607/0161',
      accountNo: 'GST/2607/7731',
      accountName: 'GST on Service Charges',
      particulars: 'GST Collected on Service Charges',
      debit: 0,
      credit: 22000
    },
    {
      glCode: '254002',
      voucherNo: 'TRF/2607/0162',
      accountNo: 'GST/2607/7736',
      accountName: 'GST on Locker Rent',
      particulars: 'GST Collected on Locker Rent',
      debit: 0,
      credit: 16000
    },
    {
      glCode: '254002',
      voucherNo: 'TRF/2607/0163',
      accountNo: 'GST/2607/7702',
      accountName: 'GST Department',
      particulars: 'GST Remitted to Government - Monthly Return',
      debit: 19000,
      credit: 0
    },
    {
      glCode: '254002',
      voucherNo: 'TRF/2607/0164',
      accountNo: 'GST/2607/7703',
      accountName: 'GST Department',
      particulars: 'GST Remitted to Government - Late Fee Adjustment',
      debit: 13000,
      credit: 0
    }
  ];

  clearingTxns: TxnRow[] = [
    // 300201 - Outward Clearing, Cheques Sent (credit 980000 / debit 910000)
    {
      glCode: '300201',
      voucherNo: 'CLR/2607/0031',
      accountNo: 'CHQ-000123',
      accountName: 'Rajesh Kumar Singh',
      particulars: 'Cheque No 000123 Sent - Rajesh Kumar Singh',
      debit: 0,
      credit: 550000
    },
    {
      glCode: '300201',
      voucherNo: 'CLR/2607/0032',
      accountNo: 'CHQ-000129',
      accountName: 'Manoj Tiwari',
      particulars: 'Cheque No 000129 Sent - Manoj Tiwari',
      debit: 0,
      credit: 430000
    },
    {
      glCode: '300201',
      voucherNo: 'CLR/2607/0033',
      accountNo: 'CHQ-000145',
      accountName: 'Nisha Agarwal',
      particulars: 'Outward Clearing Realised - Nisha Agarwal',
      debit: 520000,
      credit: 0
    },
    {
      glCode: '300201',
      voucherNo: 'CLR/2607/0034',
      accountNo: 'CHQ-000151',
      accountName: 'Devendra Kale',
      particulars: 'Outward Clearing Realised - Devendra Kale',
      debit: 390000,
      credit: 0
    },
    // 300202 - Inward Clearing, Cheques Received (credit 875000 / debit 820000)
    {
      glCode: '300202',
      voucherNo: 'CLR/2607/0035',
      accountNo: 'CHQ-000456',
      accountName: 'Sameer Joshi',
      particulars: 'Cheque No 000456 Received - Sameer Joshi',
      debit: 0,
      credit: 500000
    },
    {
      glCode: '300202',
      voucherNo: 'CLR/2607/0036',
      accountNo: 'CHQ-000461',
      accountName: 'Ritu Bansal',
      particulars: 'Cheque No 000461 Received - Ritu Bansal',
      debit: 0,
      credit: 375000
    },
    {
      glCode: '300202',
      voucherNo: 'CLR/2607/0037',
      accountNo: 'CHQ-000478',
      accountName: 'Pooja Malhotra',
      particulars: 'Inward Clearing Passed for Payment - Pooja Malhotra',
      debit: 470000,
      credit: 0
    },
    {
      glCode: '300202',
      voucherNo: 'CLR/2607/0038',
      accountNo: 'CHQ-000483',
      accountName: 'Ajit Naik',
      particulars: 'Inward Clearing Passed for Payment - Ajit Naik',
      debit: 350000,
      credit: 0
    },
    // 300203 - Clearing Suspense Account (credit 60000 / debit 58000)
    {
      glCode: '300203',
      voucherNo: 'CLR/2607/0039',
      accountNo: 'CHQ-000512',
      accountName: 'ABC Enterprises',
      particulars: 'Clearing Difference Booked - ABC Enterprises',
      debit: 0,
      credit: 35000
    },
    {
      glCode: '300203',
      voucherNo: 'CLR/2607/0040',
      accountNo: 'CHQ-000519',
      accountName: 'Global Traders',
      particulars: 'Clearing Difference Booked - Global Traders',
      debit: 0,
      credit: 25000
    },
    {
      glCode: '300203',
      voucherNo: 'CLR/2607/0041',
      accountNo: 'CHQ-000534',
      accountName: 'XYZ Traders',
      particulars: 'Cheque Return - Insufficient Funds - XYZ Traders',
      debit: 33000,
      credit: 0
    },
    {
      glCode: '300203',
      voucherNo: 'CLR/2607/0042',
      accountNo: 'CHQ-000541',
      accountName: 'Om Textiles',
      particulars: 'Cheque Return - Insufficient Funds - Om Textiles',
      debit: 25000,
      credit: 0
    },
    // 300204 - CTS Clearing Difference Account (credit 12500 / debit 11000)
    {
      glCode: '300204',
      voucherNo: 'CLR/2607/0043',
      accountNo: 'CTS-GRID-01A',
      accountName: 'CTS Grid Rounding Adjustment - Batch 1 (Cr)',
      particulars: 'CTS Grid Rounding Adjustment - Batch 1',
      debit: 0,
      credit: 7500
    },
    {
      glCode: '300204',
      voucherNo: 'CLR/2607/0044',
      accountNo: 'CTS-GRID-01B',
      accountName: 'CTS Grid Rounding Adjustment - Batch 2 (Cr)',
      particulars: 'CTS Grid Rounding Adjustment - Batch 2',
      debit: 0,
      credit: 5000
    },
    {
      glCode: '300204',
      voucherNo: 'CLR/2607/0045',
      accountNo: 'CTS-GRID-02A',
      accountName: 'CTS Grid Rounding Adjustment - Batch 1 (Dr)',
      particulars: 'CTS Grid Rounding Adjustment - Batch 1',
      debit: 6500,
      credit: 0
    },
    {
      glCode: '300204',
      voucherNo: 'CLR/2607/0046',
      accountNo: 'CTS-GRID-02B',
      accountName: 'CTS Grid Rounding Adjustment - Batch 2 (Dr)',
      particulars: 'CTS Grid Rounding Adjustment - Batch 2',
      debit: 4500,
      credit: 0
    },
    // 300205 - Local Clearing House Account (credit 310000 / debit 292000)
    {
      glCode: '300205',
      voucherNo: 'CLR/2607/0047',
      accountNo: 'MUM-CH-S1',
      accountName: 'Mumbai Clearing House - Session I',
      particulars: 'CTS Grid Settlement - Session I (Cr)',
      debit: 0,
      credit: 180000
    },
    {
      glCode: '300205',
      voucherNo: 'CLR/2607/0048',
      accountNo: 'MUM-CH-S2',
      accountName: 'Mumbai Clearing House - Session II',
      particulars: 'CTS Grid Settlement - Session II (Cr)',
      debit: 0,
      credit: 130000
    },
    {
      glCode: '300205',
      voucherNo: 'CLR/2607/0049',
      accountNo: 'MUM-CH-S1D',
      accountName: 'Mumbai Clearing House - Session I',
      particulars: 'CTS Grid Settlement - Session I (Dr)',
      debit: 165000,
      credit: 0
    },
    {
      glCode: '300205',
      voucherNo: 'CLR/2607/0050',
      accountNo: 'MUM-CH-S2D',
      accountName: 'Mumbai Clearing House - Session II',
      particulars: 'CTS Grid Settlement - Session II (Dr)',
      debit: 127000,
      credit: 0
    }
  ];

  digitalTxns: TxnRow[] = [
    // RTGS - Overall (credit 4850000 / debit 4620000)
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8891',
      accountNo: 'UTR-RTGS26073100234',
      accountName: 'Deepak Enterprises',
      particulars: 'RTGS Inward - Remitting Bank HDFC',
      debit: 0,
      credit: 2200000
    },
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8892',
      accountNo: 'UTR-RTGS26073100256',
      accountName: 'Reliance Distributors Pvt Ltd',
      particulars: 'RTGS Inward - Remitting Bank ICICI',
      debit: 0,
      credit: 1650000
    },
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8893',
      accountNo: 'UTR-RTGS26073100278',
      accountName: 'Wadia Constructions',
      particulars: 'RTGS Inward - Remitting Bank Axis',
      debit: 0,
      credit: 1000000
    },
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8894',
      accountNo: 'UTR-RTGS26073100891',
      accountName: 'Kunal Manufacturing Co.',
      particulars: 'RTGS Outward - Beneficiary Bank HDFC',
      debit: 2000000,
      credit: 0
    },
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8895',
      accountNo: 'UTR-RTGS26073100904',
      accountName: 'Bansal Steel Traders',
      particulars: 'RTGS Outward - Beneficiary Bank SBI',
      debit: 1600000,
      credit: 0
    },
    {
      glCode: 'RTGS',
      voucherNo: 'RTGS/2607/8896',
      accountNo: 'UTR-RTGS26073100918',
      accountName: 'Mehta Exports',
      particulars: 'RTGS Outward - Beneficiary Bank ICICI',
      debit: 1020000,
      credit: 0
    },
    // NEFT - Overall (credit 3260000 / debit 3105000)
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6712',
      accountNo: 'UTR-NEFT26073100589',
      accountName: 'Priya Sharma',
      particulars: 'NEFT Inward - Remitting Bank SBI',
      debit: 0,
      credit: 1500000
    },
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6713',
      accountNo: 'UTR-NEFT26073100601',
      accountName: 'Kunal Oberoi',
      particulars: 'NEFT Inward - Remitting Bank HDFC',
      debit: 0,
      credit: 1100000
    },
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6714',
      accountNo: 'UTR-NEFT26073100617',
      accountName: 'Sanya Kapoor',
      particulars: 'NEFT Inward - Remitting Bank ICICI',
      debit: 0,
      credit: 660000
    },
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6715',
      accountNo: 'UTR-NEFT26073100742',
      accountName: 'Sanjay Wholesale Traders',
      particulars: 'NEFT Outward - Beneficiary Bank SBI',
      debit: 1400000,
      credit: 0
    },
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6716',
      accountNo: 'UTR-NEFT26073100758',
      accountName: 'Rakesh Chandok',
      particulars: 'NEFT Outward - Beneficiary Bank Axis',
      debit: 1000000,
      credit: 0
    },
    {
      glCode: 'NEFT',
      voucherNo: 'NEFT/2607/6717',
      accountNo: 'UTR-NEFT26073100763',
      accountName: 'Meera Iyer',
      particulars: 'NEFT Outward - Beneficiary Bank HDFC',
      debit: 705000,
      credit: 0
    },
    // UPI - Overall (credit 5480000 / debit 5390000) - NPCI settlement batched by time slot
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44521',
      accountNo: 'RRN-UPI26073100145',
      accountName: 'UPI Inward Settlement - Morning Batch (00:00-12:00)',
      particulars: 'UPI Collect - Merchant/P2P Inward (Aggregated)',
      debit: 0,
      credit: 1980000
    },
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44522',
      accountNo: 'RRN-UPI26073100289',
      accountName: 'UPI Inward Settlement - Afternoon Batch (12:00-18:00)',
      particulars: 'UPI Collect - Merchant/P2P Inward (Aggregated)',
      debit: 0,
      credit: 2100000
    },
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44523',
      accountNo: 'RRN-UPI26073100356',
      accountName: 'UPI Inward Settlement - Evening Batch (18:00-24:00)',
      particulars: 'UPI Collect - Merchant/P2P Inward (Aggregated)',
      debit: 0,
      credit: 1400000
    },
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44524',
      accountNo: 'RRN-UPI26073100478',
      accountName: 'UPI Outward Settlement - Morning Batch (00:00-12:00)',
      particulars: 'UPI Pay - Merchant/P2P Outward (Aggregated)',
      debit: 1850000,
      credit: 0
    },
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44525',
      accountNo: 'RRN-UPI26073100512',
      accountName: 'UPI Outward Settlement - Afternoon Batch (12:00-18:00)',
      particulars: 'UPI Pay - Merchant/P2P Outward (Aggregated)',
      debit: 2050000,
      credit: 0
    },
    {
      glCode: 'UPI',
      voucherNo: 'UPI/2607/44526',
      accountNo: 'RRN-UPI26073100634',
      accountName: 'UPI Outward Settlement - Evening Batch (18:00-24:00)',
      particulars: 'UPI Pay - Merchant/P2P Outward (Aggregated)',
      debit: 1490000,
      credit: 0
    },
    // ATM - Overall (credit 210000 / debit 685000)
    {
      glCode: 'ATM',
      voucherNo: 'ATM/2607/9081',
      accountNo: 'RRN-ATM26073100118',
      accountName: 'ATM Cash Deposits - Own Branch ATM (Aggregated)',
      particulars: 'ATM Cash Deposit - Own Branch ATM',
      debit: 0,
      credit: 150000
    },
    {
      glCode: 'ATM',
      voucherNo: 'ATM/2607/9082',
      accountNo: 'RRN-ATM26073100224',
      accountName: 'ATM Cash Deposits - Extension Counter ATM (Aggregated)',
      particulars: 'ATM Cash Deposit - Extension Counter ATM',
      debit: 0,
      credit: 60000
    },
    {
      glCode: 'ATM',
      voucherNo: 'ATM/2607/9083',
      accountNo: 'RRN-ATM26073100337',
      accountName: 'ATM Cash Withdrawals - Own Branch ATM (Aggregated)',
      particulars: 'ATM Cash Withdrawal - Own Branch ATM',
      debit: 420000,
      credit: 0
    },
    {
      glCode: 'ATM',
      voucherNo: 'ATM/2607/9084',
      accountNo: 'RRN-ATM26073100449',
      accountName: 'ATM Cash Withdrawals - Other Bank ATM, NFS Switch (Aggregated)',
      particulars: 'ATM Cash Withdrawal - Other Bank ATM (NFS)',
      debit: 265000,
      credit: 0
    },
    // NACH - Overall (credit 940000 / debit 865000)
    {
      glCode: 'NACH',
      voucherNo: 'NACH/2607/3304',
      accountNo: 'UMRN-NACH26073100112',
      accountName: 'NACH Credits - Corporate Payroll Disbursement (Aggregated)',
      particulars: 'NACH Credit - Salary Disbursement Batch',
      debit: 0,
      credit: 650000
    },
    {
      glCode: 'NACH',
      voucherNo: 'NACH/2607/3305',
      accountNo: 'UMRN-NACH26073100156',
      accountName: 'NACH Credits - Government Subsidy (DBT) Disbursement (Aggregated)',
      particulars: 'NACH Credit - Subsidy Disbursement Batch',
      debit: 0,
      credit: 290000
    },
    {
      glCode: 'NACH',
      voucherNo: 'NACH/2607/3306',
      accountNo: 'UMRN-NACH26073100198',
      accountName: 'NACH Debits - Retail Loan EMI Collection (Aggregated)',
      particulars: 'NACH Debit - Loan EMI Collection Batch',
      debit: 560000,
      credit: 0
    },
    {
      glCode: 'NACH',
      voucherNo: 'NACH/2607/3307',
      accountNo: 'UMRN-NACH26073100233',
      accountName: 'NACH Debits - Gold Loan EMI Collection (Aggregated)',
      particulars: 'NACH Debit - Gold Loan EMI Collection Batch',
      debit: 305000,
      credit: 0
    }
  ];

  /** YYMM tag baked into every dummy voucher/reference number (e.g. "2607" for Jul 2026) — kept
   *  in sync with the real current date so it never goes stale in a future month. */
  private dateTag = '2607';

  constructor() {
    const d = new Date();
    this.asOnDate = `${String(d.getDate()).padStart(2, '0')}-${String(d.getMonth() + 1).padStart(2, '0')}-${d.getFullYear()}`;
    this.dateTag = `${String(d.getFullYear()).slice(-2)}${String(d.getMonth() + 1).padStart(2, '0')}`;

    const creds = this.auth.getCredentials();
    this.isHeadOffice = this.auth.isHeadOfficeUser();
    this.currentOfficeName = creds?.officeName || 'Branch Office';
    if (this.isHeadOffice) {
      // Head Office starts on the consolidated view and can drill into either branch.
      this.selectedBranchCode = 'ALL';
    } else {
      // Match the logged-in office's real name to one of the two dummy branches, so each
      // branch's login shows its own figures. Falls back to the unscaled base dataset
      // (still labelled with the user's real office name) if no branch name matches.
      this.ownBranch =
        this.branches.find((b) => this.currentOfficeName.toLowerCase().includes(b.name.toLowerCase())) || null;
      this.selectedBranchCode = this.ownBranch?.code || 'OWN';
    }
  }

  /** Renders a voucher/reference number with the baked-in "2607" swapped for today's real YYMM tag. */
  display(value: string): string {
    return (value || '').replace(/2607/g, this.dateTag);
  }

  private baseRowsFor(tab: TabKey): SummaryRow[] {
    switch (tab) {
      case 'cash':
        return this.cashRows;
      case 'transfer':
        return this.transferRows;
      case 'clearing':
        return this.clearingRows;
      case 'digital':
        return this.digitalRows;
    }
  }

  private baseTxnsFor(tab: TabKey): TxnRow[] {
    switch (tab) {
      case 'cash':
        return this.cashTxns;
      case 'transfer':
        return this.transferTxns;
      case 'clearing':
        return this.clearingTxns;
      case 'digital':
        return this.digitalTxns;
    }
  }

  private roundAmt(v: number): number {
    return Math.round(v / 100) * 100;
  }

  private scaleRows(rows: SummaryRow[], factor: number): SummaryRow[] {
    if (factor === 1) {
      return rows;
    }
    return rows.map((r) => ({ ...r, opening: this.roundAmt(r.opening * factor) }));
  }

  /**
   * Re-derives a customer account number or bank IFSC code for a different branch by shifting
   * its numeric segment — NOT by tagging a prefix onto Branch 1's value, since real account
   * numbers and IFSC codes have a fixed, standard shape and a "BR2-" prefix would look fake.
   * Everything else (UTR/RRN/UMRN/DD/PO/TDS/GST/cheque/branch/settlement references) keeps the
   * simpler branch-tag prefix, since those are already free-form internal reference formats.
   */
  private scaleAccountNo(accountNo: string, branch: Branch): string {
    if (/^\d{12}$/.test(accountNo)) {
      const branchSeg = (parseInt(accountNo.slice(0, 3), 10) + branch.acctShift) % 1000;
      return String(branchSeg).padStart(3, '0') + accountNo.slice(3);
    }
    const ifsc = accountNo.match(/^([A-Z]{4}0)(\d{6})$/);
    if (ifsc) {
      const serial = (parseInt(ifsc[2], 10) + branch.acctShift) % 1000000;
      return ifsc[1] + String(serial).padStart(6, '0');
    }
    return `${branch.code}-${accountNo}`;
  }

  private scaleTxns(txns: TxnRow[], branch: Branch | null): TxnRow[] {
    if (!branch || branch.scale === 1) {
      return txns;
    }
    return txns.map((t) => ({
      ...t,
      voucherNo: `${branch.code}-${t.voucherNo}`,
      accountNo: this.scaleAccountNo(t.accountNo, branch),
      debit: this.roundAmt(t.debit * branch.scale),
      credit: this.roundAmt(t.credit * branch.scale)
    }));
  }

  /** Rows for a given tab, scoped to the currently selected branch (or consolidated across both, for Head Office). */
  private effectiveRows(tab: TabKey): SummaryRow[] {
    const base = this.baseRowsFor(tab);
    if (!this.isHeadOffice) {
      return this.ownBranch ? this.scaleRows(base, this.ownBranch.scale) : base;
    }
    if (this.selectedBranchCode === 'ALL') {
      return base.map((r) => ({
        ...r,
        opening: this.branches.reduce((sum, b) => sum + this.roundAmt(r.opening * b.scale), 0)
      }));
    }
    const branch = this.branches.find((b) => b.code === this.selectedBranchCode);
    return this.scaleRows(base, branch ? branch.scale : 1);
  }

  /** Transactions for a given tab, scoped to the currently selected branch (or merged across both, for Head Office). */
  private effectiveTxns(tab: TabKey): TxnRow[] {
    const base = this.baseTxnsFor(tab);
    if (!this.isHeadOffice) {
      return this.scaleTxns(base, this.ownBranch);
    }
    if (this.selectedBranchCode === 'ALL') {
      return this.branches.flatMap((b) => this.scaleTxns(base, b));
    }
    const branch = this.branches.find((b) => b.code === this.selectedBranchCode);
    return this.scaleTxns(base, branch ?? null);
  }

  get rowsForActiveTab(): SummaryRow[] {
    return this.effectiveRows(this.activeTab);
  }

  get txnsForActiveTab(): TxnRow[] {
    return this.effectiveTxns(this.activeTab);
  }

  /** Name of the branch/scope currently being viewed, for display in the header. */
  get scopeName(): string {
    if (!this.isHeadOffice) {
      return this.currentOfficeName;
    }
    if (this.selectedBranchCode === 'ALL') {
      return 'All Branches (Consolidated)';
    }
    return this.branches.find((b) => b.code === this.selectedBranchCode)?.name || '';
  }

  setBranch(code: string): void {
    this.selectedBranchCode = code;
    this.glFilter = null;
  }

  setTab(tab: TabKey): void {
    this.activeTab = tab;
    this.glFilter = null;
  }

  toggleDetails(): void {
    this.showDetails = !this.showDetails;
    this.glFilter = null;
  }

  setGlFilter(code: string | null): void {
    this.glFilter = code;
  }

  /** Transactions for the Transaction Details view, narrowed to the selected GL/channel filter (or all, when null). */
  get filteredTxns(): TxnRow[] {
    if (!this.glFilter) {
      return this.txnsForActiveTab;
    }
    return this.txnsForActiveTab.filter((t) => t.glCode === this.glFilter);
  }

  /** Short label for a GL filter chip — the channel code for Digital (RTGS/NEFT/...), the GL name otherwise. */
  filterLabel(row: SummaryRow): string {
    return this.activeTab === 'digital' ? row.code : row.name;
  }

  /** GL name for the code tracked on this txn row, so the Transaction Details journal can show
   *  "which GL" alongside the account, not just a bare code. */
  glName(code: string): string {
    return this.rowsForActiveTab.find((r) => r.code === code)?.name || code;
  }

  /**
   * Every transaction here is only ever recorded as ONE leg (whichever GL this Cash/Clearing/
   * Transfer/Digital screen tracks) — the offsetting leg (the customer's own account, a
   * settlement/clearing-house account, etc.) was never modelled as a separate GL row. Rather
   * than leaving that side blank, this derives a sensible label for it so the Transaction
   * Details view can show the FULL double entry (Dr leg + Cr leg, always equal amounts) —
   * exactly what a real CBS "Day Book"/Journal Register shows, and what makes it possible to
   * see at a glance that a transaction is complete and ready for reconciliation.
   *
   * For internal cash-movement postings (ATM cash-in-transit, currency chest, denomination
   * shortages, CTS grid rounding) the account name already describes the SAME leg rather than a
   * distinct counter-party, so those get a purpose-built contra label. Everything else already
   * has a descriptive counter-party name (customer, vendor, bank branch, government department)
   * that IS the natural contra account, so it's used as-is — WITHOUT repeating the account/
   * reference number, since that number is already shown against the tracked GL leg on the
   * other line; showing it a second time here would make both lines look like the same account,
   * defeating the point of a "Balanced" two-sided entry.
   */
  contraLabel(t: TxnRow): string {
    const p = t.particulars.toLowerCase();
    if (p.includes('atm') && (p.includes('vault') || p.includes('loading') || p.includes('surrendered'))) {
      return 'ATM Cash-in-Transit Account';
    }
    if (p.includes('currency chest')) {
      return 'Currency Chest Account (Sponsor Bank)';
    }
    if (p.includes('denomination') || p.includes('shortage adjustment')) {
      return 'Cash Difference / Shortage Suspense Account';
    }
    if (p.includes('cts grid rounding')) {
      return 'CTS Grid Rounding Suspense Account';
    }
    return t.accountName;
  }

  /** The single non-zero amount on this leg — always what the derived contra leg mirrors. */
  legAmount(t: TxnRow): number {
    return t.debit > 0 ? t.debit : t.credit;
  }

  /** Credit total for a GL row — always summed from its own txn lines, never a separate hand-entered number. */
  rowCredit(row: SummaryRow, txns: TxnRow[]): number {
    return txns.filter((t) => t.glCode === row.code).reduce((sum, t) => sum + t.credit, 0);
  }

  /** Debit total for a GL row — always summed from its own txn lines, never a separate hand-entered number. */
  rowDebit(row: SummaryRow, txns: TxnRow[]): number {
    return txns.filter((t) => t.glCode === row.code).reduce((sum, t) => sum + t.debit, 0);
  }

  closing(row: SummaryRow, txns: TxnRow[]): number {
    return row.opening + this.rowCredit(row, txns) - this.rowDebit(row, txns);
  }

  total(rows: SummaryRow[], txns: TxnRow[], key: 'opening' | 'credit' | 'debit'): number {
    if (key === 'opening') {
      return rows.reduce((sum, r) => sum + r.opening, 0);
    }
    if (key === 'credit') {
      return rows.reduce((sum, r) => sum + this.rowCredit(r, txns), 0);
    }
    return rows.reduce((sum, r) => sum + this.rowDebit(r, txns), 0);
  }

  totalClosing(rows: SummaryRow[], txns: TxnRow[]): number {
    return this.total(rows, txns, 'opening') + this.total(rows, txns, 'credit') - this.total(rows, txns, 'debit');
  }

  txnTotal(rows: TxnRow[], key: 'debit' | 'credit'): number {
    return rows.reduce((sum, r) => sum + r[key], 0);
  }

  private readonly allTabs: TabKey[] = [
    'cash',
    'transfer',
    'clearing',
    'digital'
  ];

  /** Cash/Transfer/Clearing/Digital category pairs, scoped to the currently selected branch. */
  private get categories(): Array<{ rows: SummaryRow[]; txns: TxnRow[] }> {
    return this.allTabs.map((tab) => ({ rows: this.effectiveRows(tab), txns: this.effectiveTxns(tab) }));
  }

  get grandOpening(): number {
    return this.categories.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'opening'), 0);
  }

  get grandCredit(): number {
    return this.categories.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'credit'), 0);
  }

  get grandDebit(): number {
    return this.categories.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'debit'), 0);
  }

  get grandClosing(): number {
    return this.grandOpening + this.grandCredit - this.grandDebit;
  }

  /**
   * Branch-wise contribution to the day's overall position — shown only to Head Office
   * users while viewing "All Branches". Each branch's figures are derived the same way
   * (opening scaled, credit/debit summed from that branch's own scaled txns), so this
   * table can never drift from what you'd see by drilling into that branch individually.
   */
  get branchBreakup(): Array<{
    code: string;
    name: string;
    opening: number;
    credit: number;
    debit: number;
    closing: number;
  }> {
    return this.branches.map((b) => {
      const pairs = this.allTabs.map((tab) => ({
        rows: this.scaleRows(this.baseRowsFor(tab), b.scale),
        txns: this.scaleTxns(this.baseTxnsFor(tab), b)
      }));
      const opening = pairs.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'opening'), 0);
      const credit = pairs.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'credit'), 0);
      const debit = pairs.reduce((sum, c) => sum + this.total(c.rows, c.txns, 'debit'), 0);
      return { code: b.code, name: b.name, opening, credit, debit, closing: opening + credit - debit };
    });
  }

  /**
   * Exports the full report for the currently viewed scope (own branch, a drilled-into branch,
   * or "All Branches" consolidated) — every category (Cash/Transfer/Clearing/Digital), not just
   * the tab on screen, so the workbook is a complete record. "Summary" mirrors the Opening/
   * Credit/Debit/Closing view; "Transaction Details" mirrors the full double-entry journal view
   * (same glName/contraLabel/legAmount derivations, so the export can never disagree with what's
   * on screen); "Branch Breakup" is added only when Head Office is viewing the consolidated view.
   */
  async exportExcel(): Promise<void> {
    this.generating = true;
    try {
      const summaryRows: (string | number | null)[][] = [];
      const journalRows: (string | number | null)[][] = [];

      for (const tab of this.allTabs) {
        const label = this.tabLabels[tab];
        const rows = this.effectiveRows(tab);
        const txns = this.effectiveTxns(tab);

        rows.forEach((r) => {
          summaryRows.push([
            label,
            r.code,
            r.name,
            r.opening,
            this.rowCredit(r, txns),
            this.rowDebit(r, txns),
            this.closing(r, txns)
          ]);
        });
        summaryRows.push([
          `${label} Total`,
          '',
          '',
          this.total(rows, txns, 'opening'),
          this.total(rows, txns, 'credit'),
          this.total(rows, txns, 'debit'),
          this.totalClosing(rows, txns)
        ]);

        txns.forEach((t) => {
          const glText = rows.find((r) => r.code === t.glCode)?.name || t.glCode;
          journalRows.push([
            label,
            this.asOnDate,
            this.display(t.voucherNo),
            'Dr',
            t.debit > 0 ? t.glCode : '',
            t.debit > 0 ? `${glText} — ${this.display(t.accountNo)} (${t.accountName})` : this.contraLabel(t),
            this.legAmount(t),
            null,
            'Balanced'
          ]);
          journalRows.push([
            label,
            this.asOnDate,
            this.display(t.voucherNo),
            'Cr',
            t.credit > 0 ? t.glCode : '',
            t.credit > 0 ? `${glText} — ${this.display(t.accountNo)} (${t.accountName})` : this.contraLabel(t),
            null,
            this.legAmount(t),
            'Balanced'
          ]);
        });
      }
      summaryRows.push([
        'Grand Total',
        '',
        '',
        this.grandOpening,
        this.grandCredit,
        this.grandDebit,
        this.grandClosing
      ]);

      const sheets: ExportSheetSpec[] = [
        {
          sheetName: 'Summary',
          title: 'Cash / Clearing / Transfer - Summary Report',
          subtitle: `Scope: ${this.scopeName}   ·   As On: ${this.asOnDate}`,
          headers: [
            'Category',
            'GL Code',
            'Particulars',
            'Opening',
            'Credit',
            'Debit',
            'Closing'
          ],
          widths: [
            12,
            12,
            34,
            16,
            16,
            16,
            16
          ],
          rows: summaryRows
        },
        {
          sheetName: 'Transaction Details',
          title: 'Transaction Details — Full Double Entry',
          subtitle: `Scope: ${this.scopeName}   ·   As On: ${this.asOnDate}`,
          headers: [
            'Category',
            'Date',
            'Voucher / Ref No',
            'Dr / Cr',
            'GL Code',
            'GL / Account',
            'Debit',
            'Credit',
            'Status'
          ],
          widths: [
            12,
            12,
            20,
            8,
            10,
            46,
            16,
            16,
            12
          ],
          rows: journalRows
        }
      ];

      if (this.isHeadOffice && this.selectedBranchCode === 'ALL') {
        sheets.push({
          sheetName: 'Branch Breakup',
          title: 'Branch-wise Break-up',
          subtitle: `As On: ${this.asOnDate}`,
          headers: [
            'Branch',
            'Opening',
            'Credit',
            'Debit',
            'Closing'
          ],
          widths: [
            22,
            16,
            16,
            16,
            16
          ],
          rows: [
            ...this.branchBreakup.map((b) => [
              b.name,
              b.opening,
              b.credit,
              b.debit,
              b.closing
            ]),
            [
              'All Branches',
              this.grandOpening,
              this.grandCredit,
              this.grandDebit,
              this.grandClosing
            ]
          ]
        });
      }

      await exportWorkbook(sheets, `Cash-Clearing-Transfer-Summary-${this.scopeName}-${this.asOnDate}`);
    } catch (err) {
      console.error('Cash/Clearing/Transfer export failed', err);
    } finally {
      this.generating = false;
    }
  }
}