/**
 * 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, ElementRef, ViewChild, inject } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { UntypedFormBuilder, Validators } from '@angular/forms';
import { CurrencyPipe } from '@angular/common';
import { MatIcon } from '@angular/material/icon';
import { DateFormatPipe } from '../../../pipes/date-format.pipe';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

/**
 * Share Account Passbook — a printable, chronological (oldest-first) ledger of every
 * Purchase/Redeem entry, mirroring PassbookTabComponent (Savings) but for share holdings:
 * shares purchased/redeemed instead of amount deposited/withdrawn, plus the Board Resolution
 * Number / Date of Meeting on redeem rows.
 */
@Component({
  selector: 'mifosx-shares-passbook-tab',
  templateUrl: './passbook-tab.component.html',
  styleUrls: ['./passbook-tab.component.scss'],
  standalone: true,
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    MatIcon,
    DateFormatPipe,
    CurrencyPipe
  ]
})
export class SharesPassbookTabComponent implements OnInit {
  private route = inject(ActivatedRoute);
  private formBuilder = inject(UntypedFormBuilder);

  @ViewChild('passbookContent') passbookContent: ElementRef;

  /** Account data */
  accountNo = '';
  clientName = '';
  productName = '';
  currency: any = null;
  status = '';
  activatedOnDate: any = null;
  resolutionNumber = '';
  resolutionDate: any = null;
  savingsAccountNumber = '';
  totalApprovedShares = 0;
  currentMarketPrice = 0;

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

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

  get currentValue(): number {
    return this.totalApprovedShares * this.currentMarketPrice;
  }

  ngOnInit(): void {
    this.route.parent.data.subscribe((data: { sharesAccountData: any }) => {
      const account = data.sharesAccountData;
      this.accountNo = account.accountNo || '';
      this.clientName = account.clientName || '';
      this.productName = account.productName || '';
      this.currency = account.currency || null;
      this.status = account.status?.value || '';
      this.activatedOnDate = account.timeline?.activatedDate || null;
      this.resolutionNumber = account.resolutionNumber || '';
      this.resolutionDate = account.resolutionDate || null;
      this.savingsAccountNumber = account.savingsAccountNumber || '';
      this.totalApprovedShares = account.summary?.totalApprovedShares || 0;
      this.currentMarketPrice = account.currentMarketPrice || 0;

      const transactions = (account.purchasedShares || []).filter(
        (transaction: any) => transaction.type.value !== 'Charge Payment'
      );
      this.allTransactions = this.recalculateRunningBalances(this.sortAscending(transactions));
      this.filteredTransactions = [...this.allTransactions];
    });

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

  isRedeem(transaction: any): boolean {
    return transaction.type?.value === 'Redeem';
  }

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

    if (!fromDate || !toDate) return;

    const from = new Date(fromDate).getTime();
    const to = new Date(toDate).getTime();

    this.filteredTransactions = this.allTransactions.filter((txn: any) => {
      const txnDate = this.getTransactionDateAsTime(txn.purchasedDate);
      return txnDate >= from && txnDate <= to;
    });
    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 content = this.passbookContent?.nativeElement?.innerHTML;
    if (!content) return;

    const printWindow = window.open('', 'SharePassbook', 'height=700,width=900');
    printWindow.document.write(`
      <html>
      <head>
        <title>Share Account Passbook - ${this.accountNo}</title>
        <style>
          * { margin: 0; padding: 0; box-sizing: border-box; }
          body { font-family: 'Segoe UI', Arial, sans-serif; padding: 20px; color: #333; }
          .passbook-header { text-align: center; margin-bottom: 20px; border-bottom: 2px solid #1a3a6b; padding-bottom: 12px; }
          table { width: 100%; border-collapse: collapse; font-size: 11px; }
          th { background: #1a3a6b; color: #fff; padding: 6px 8px; text-align: left; font-weight: 600; }
          td { padding: 5px 8px; border-bottom: 1px solid #e0e0e0; }
          tr:nth-child(even) { background: #fafafa; }
          .text-right { text-align: right; }
        </style>
      </head>
      <body>
        ${content}
      </body>
      </html>
    `);
    printWindow.document.close();
    printWindow.focus();
    printWindow.print();
    printWindow.close();
  }

  private recalculateRunningBalances(transactions: any[]): any[] {
    let balance = 0;
    return transactions.map((txn) => {
      const shares = Number(txn.numberOfShares) || 0;
      balance += this.isRedeem(txn) ? -shares : shares;
      return { ...txn, runningBalance: balance };
    });
  }

  private sortAscending(transactions: any[]): any[] {
    return [...transactions].sort((a, b) => {
      const dateA = this.getTransactionDateAsTime(a.purchasedDate);
      const dateB = this.getTransactionDateAsTime(b.purchasedDate);
      if (dateA !== dateB) return dateA - dateB;
      return (a.id as number) - (b.id as number);
    });
  }
}