/**
 * 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/.
 */

/** Angular Imports */
import { Component, OnInit, OnDestroy, inject, ElementRef, ViewChild } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { UntypedFormBuilder } from '@angular/forms';
import { CurrencyPipe } from '@angular/common';
import { Subject, takeUntil } from 'rxjs';

/** Custom Services */
import { SettingsService } from 'app/settings/settings.service';
import { Dates } from 'app/core/utils/dates';
import { Currency } from 'app/shared/models/general.model';
import {
  CurrentAccountTransaction,
  CurrentAccountTransactionType
} from 'app/current-accounts/models/current-account-transaction.model';
import { MatIcon } from '@angular/material/icon';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { DateFormatPipe } from '../../../pipes/date-format.pipe';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

@Component({
  selector: 'mifosx-passbook-tab',
  templateUrl: './passbook-tab.component.html',
  styleUrls: ['./passbook-tab.component.scss'],
  standalone: true,
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatIcon,
    FaIconComponent,
    DateFormatPipe,
    CurrencyPipe
  ]
})
export class PassbookTabComponent implements OnInit, OnDestroy {
  private route = inject(ActivatedRoute);
  private formBuilder = inject(UntypedFormBuilder);
  private settingsService = inject(SettingsService);
  private dateUtils = inject(Dates);

  private destroy$ = new Subject<void>();

  @ViewChild('passbookContent') passbookContent: ElementRef;

  /** Account data */
  accountNo: string = '';
  clientName: string = '';
  productName: string = '';
  currency: Currency | null = null;
  status: string = '';
  interestRate: number = 0;
  accountBalance: number = 0;
  availableBalance: number = 0;
  activatedOnDate: any = null;

  /** Transactions */
  allTransactions: CurrentAccountTransaction[] = [];
  filteredTransactions: CurrentAccountTransaction[] = [];

  /** Date range form */
  minDate = new Date(2000, 0, 1);
  maxDate = new Date();
  dateRangeForm: any;
  isFiltered = false;

  ngOnInit(): void {
    this.maxDate = this.settingsService.businessDate;

    this.route.parent.data.pipe(takeUntil(this.destroy$)).subscribe((data: { currentAccountData: any }) => {
      const account = data.currentAccountData;
      this.accountNo = account.accountNo || '';
      this.clientName = account.clientName || account.groupName || '';
      this.productName = account.currentAccountProductName || '';
      this.currency = account.currency || null;
      this.status = account.status?.value || '';
      this.interestRate = account.nominalAnnualInterestRate || 0;
      this.accountBalance = account.summary?.accountBalance || 0;
      this.availableBalance = account.summary?.availableBalance || 0;
      this.activatedOnDate = account.timeline?.activatedOnDate || null;
      this.allTransactions = this.computeRunningBalances(account.transactions || []);
      this.filteredTransactions = [...this.allTransactions];
    });

    this.dateRangeForm = this.formBuilder.group({
      fromDate: [''],
      toDate: ['']
    });
  }

  private computeRunningBalances(transactions: CurrentAccountTransaction[]): CurrentAccountTransaction[] {
    let balance = 0;
    return transactions.map((txn) => {
      if (txn.runningBalance != null) {
        balance = txn.runningBalance;
      } else {
        const amount = txn.amount || 0;
        if (this.isDebit(txn.transactionType)) {
          balance = balance - amount;
        } else {
          balance = balance + amount;
        }
        txn = { ...txn, runningBalance: balance };
      }
      return txn;
    });
  }

  isDebit(transactionType: CurrentAccountTransactionType): boolean {
    return (
      transactionType.withdrawal === true ||
      transactionType.feeDeduction === true ||
      transactionType.overdraftInterest === true ||
      transactionType.withholdTax === true
    );
  }

  filterTransactions(): void {
    const fromDate = this.dateRangeForm.value.fromDate;
    const toDate = this.dateRangeForm.value.toDate;

    this.filteredTransactions = this.allTransactions.filter((txn: CurrentAccountTransaction) => {
      const txnDate = this.getTransactionDateAsTime(txn.date);
      if (fromDate && new Date(fromDate).getTime() > txnDate) return false;
      if (toDate) {
        const toEnd = new Date(toDate);
        toEnd.setHours(23, 59, 59, 999);
        if (toEnd.getTime() < txnDate) return false;
      }
      return true;
    });
    this.isFiltered = true;
  }

  clearFilter(): void {
    this.dateRangeForm.reset();
    this.filteredTransactions = [...this.allTransactions];
    this.isFiltered = false;
  }

  private getTransactionDateAsTime(date: any): number {
    if (Array.isArray(date) && date.length >= 3) {
      return new Date(date[0], date[1] - 1, date[2]).getTime();
    }
    return new Date(date).getTime();
  }

  printPassbook(): void {
    const source = this.passbookContent?.nativeElement as HTMLElement;
    if (!source) return;

    /** Work on a copy so the on-screen statement is untouched */
    const clone = source.cloneNode(true) as HTMLElement;
    clone.querySelectorAll('.no-print').forEach((el: Element) => el.remove());

    /** Material icon fonts are not available in the popup, so swap them for inline SVG */
    clone.querySelectorAll('mat-icon, .mat-icon').forEach((el: Element) => {
      const insideLogo = !!el.closest('.bank-logo-circle');
      if (insideLogo) {
        el.outerHTML = PassbookTabComponent.BANK_LOGO_SVG;
      } else {
        el.remove();
      }
    });

    const printWindow = window.open('', 'Passbook', 'height=800,width=1100');
    if (!printWindow) return;

    printWindow.document.write(`
      <html>
      <head>
        <meta charset="utf-8" />
        <title>Current Account Passbook - ${this.accountNo}</title>
        <style>${PassbookTabComponent.PRINT_STYLES}</style>
      </head>
      <body>
        <div class="statement-print-page">${clone.outerHTML}</div>
        <script>
          window.onafterprint = function () { window.close(); };
          window.addEventListener('load', function () { window.focus(); window.print(); });
        </script>
      </body>
      </html>
    `);
    printWindow.document.close();
    printWindow.focus();
  }

  /** Material "account_balance" glyph, inlined so the print window needs no icon font */
  private static readonly BANK_LOGO_SVG = `
    <svg class="bank-logo-svg" viewBox="0 0 24 24" width="26" height="26" aria-hidden="true">
      <path d="M4 10h3v7H4zM10.5 10h3v7h-3zM2 19h20v3H2zM17 10h3v7h-3zM12 1L2 6v2h20V6z" />
    </svg>`;

  /**
   * Mirrors passbook-tab.component.scss so the printed statement looks like the
   * on-screen one. Kept in sync manually - component styles are scoped and are
   * not reachable from the popup window.
   */
  private static readonly PRINT_STYLES = `
    @page { size: A4 portrait; margin: 10mm; }

    * { margin: 0; padding: 0; box-sizing: border-box; -webkit-print-color-adjust: exact; print-color-adjust: exact; }

    body {
      font-family: 'Segoe UI', Arial, sans-serif;
      color: #333;
      background: #fff;
    }

    .statement-print-page { padding: 0; }

    .statement-wrapper {
      background: #fff;
      border: 1px solid #d0d7e3;
      border-radius: 6px;
      overflow: hidden;
    }

    /* Bank header */
    .bank-header {
      background: #1a3a6b;
      padding: 14px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 4px solid #c8a951;
    }

    .bank-logo-area { display: flex; align-items: center; gap: 12px; }

    .bank-logo-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #c8a951;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .bank-logo-svg { fill: #1a3a6b; display: block; }

    .bank-name-block .bank-title {
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      letter-spacing: 0.3px;
    }

    .bank-name-block .bank-subtitle {
      color: #c8a951;
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-top: 2px;
    }

    .statement-label { text-align: right; }

    .statement-label .stmt-label-text {
      color: #c8a951;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
    }

    .statement-label .stmt-period {
      color: rgba(255, 255, 255, 0.75);
      font-size: 10px;
      margin-top: 3px;
    }

    /* Account details band */
    .account-details-band {
      background: #f0f3f9;
      border-bottom: 1px solid #d0d7e3;
      padding: 12px 20px;
    }

    .account-details-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px 24px;
    }

    .detail-block .detail-label {
      font-size: 8.5px;
      font-weight: 700;
      color: #7a8aaa;
      text-transform: uppercase;
      letter-spacing: 0.8px;
      margin-bottom: 2px;
    }

    .detail-block .detail-value { font-size: 12px; color: #222; }
    .detail-block .detail-value.bold { font-weight: 600; }
    .detail-block .detail-value.mono { font-family: 'Courier New', monospace; letter-spacing: 1px; }

    .detail-block .detail-value.status-badge {
      display: inline-block;
      padding: 1px 8px;
      border-radius: 10px;
      font-size: 10px;
      font-weight: 600;
      background: #eee;
      color: #555;
    }

    .detail-block .detail-value.status-badge.active { background: #d4edda; color: #155724; }

    /* Balance summary strip */
    .balance-summary-strip {
      display: flex;
      align-items: stretch;
      background: #1a3a6b;
    }

    .balance-box { flex: 1; padding: 10px 18px; text-align: center; }

    .balance-box .balance-box-label {
      font-size: 9px;
      font-weight: 600;
      color: rgba(255, 255, 255, 0.65);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 3px;
    }

    .balance-box .balance-box-value { font-size: 15px; font-weight: 700; color: #c8a951; }

    .balance-divider { width: 1px; background: rgba(255, 255, 255, 0.15); margin: 6px 0; }

    /* Transactions table */
    .statement-table { width: 100%; border-collapse: collapse; font-size: 11px; }

    .statement-table thead { display: table-header-group; }
    .statement-table tfoot { display: table-row-group; }
    .statement-table tr { page-break-inside: avoid; break-inside: avoid; }

    .statement-table thead tr {
      background: #e8edf5;
      border-top: 1px solid #d0d7e3;
      border-bottom: 2px solid #1a3a6b;
    }

    .statement-table thead th {
      padding: 8px 9px;
      font-size: 10px;
      font-weight: 700;
      color: #1a3a6b;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      white-space: nowrap;
      text-align: left;
    }

    .statement-table tbody tr { border-bottom: 1px solid #e8ecf3; }
    .statement-table tbody tr:nth-child(even) { background: #f4f7fb; }
    .statement-table tbody tr.reversed-row { opacity: 0.55; text-decoration: line-through; }
    .statement-table tbody td { padding: 6px 9px; vertical-align: middle; color: #333; }

    .statement-table tfoot .total-row { background: #e8edf5; border-top: 2px solid #1a3a6b; }
    .statement-table tfoot .total-row td { padding: 8px 9px; }

    /* Column widths */
    .col-sr { width: 34px; }
    .col-date { width: 100px; white-space: nowrap; }
    .col-desc { min-width: 150px; }
    .col-ref { width: 74px; }
    .col-amount { width: 100px; }
    .col-balance { width: 110px; }

    /* Amount colors */
    .debit-amount { color: #c0392b; font-weight: 500; }
    .credit-amount { color: #1a7a3f; font-weight: 500; }
    .balance-amount { color: #1a3a6b; font-weight: 600; font-family: 'Courier New', monospace; }

    .total-label {
      font-size: 11px;
      font-weight: 700;
      color: #1a3a6b;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .closing-balance {
      font-size: 13px;
      font-weight: 700;
      color: #1a3a6b;
      font-family: 'Courier New', monospace;
    }

    /* Badges & misc */
    .txn-desc { font-weight: 500; }

    .reversed-badge {
      display: inline-block;
      margin-left: 6px;
      font-size: 8px;
      font-weight: 700;
      color: #fff;
      background: #e74c3c;
      padding: 1px 5px;
      border-radius: 3px;
      letter-spacing: 0.5px;
    }

    .text-right { text-align: right; }
    .text-center { text-align: center; }
    .text-muted { color: #999; }
    .mono { font-family: 'Courier New', monospace; font-size: 10px; }

    /* No data */
    .no-data-block { padding: 40px; text-align: center; color: #aaa; font-size: 13px; }

    /* Footer */
    .statement-footer {
      background: #f0f3f9;
      border-top: 1px solid #d0d7e3;
      padding: 10px 20px;
      text-align: center;
    }

    .statement-footer .footer-note {
      font-size: 9px;
      color: #888;
      margin-bottom: 3px;
      font-style: italic;
    }

    .statement-footer .footer-meta { font-size: 9px; color: #aaa; letter-spacing: 0.3px; }
  `;

  ngOnDestroy(): void {
    this.destroy$.next();
    this.destroy$.complete();
  }
}