/**
 * 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 { ActivatedRoute, Router } from '@angular/router';
import { MatDialog } from '@angular/material/dialog';
import { Currency } from 'app/shared/models/general.model';
import { CurrencyPipe } from '@angular/common';
import { ExternalIdentifierComponent } from '../../../../shared/external-identifier/external-identifier.component';
import { DateFormatPipe } from '../../../../pipes/date-format.pipe';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
import { InterestScheduleDialogComponent } from '../custom-dialogs/interest-schedule-dialog/interest-schedule-dialog.component';

@Component({
  selector: 'mifosx-general-tab',
  templateUrl: './general-tab.component.html',
  styleUrls: ['./general-tab.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    ExternalIdentifierComponent,
    FaIconComponent,
    CurrencyPipe,
    DateFormatPipe
  ]
})
export class GeneralTabComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dialog = inject(MatDialog);

  fixedDepositsAccountData: any;
  entityType: string;
  currency: Currency;

  constructor() {
    this.route.parent.data.subscribe((data: { fixedDepositsAccountData: any }) => {
      this.fixedDepositsAccountData = data.fixedDepositsAccountData;
      this.currency = this.fixedDepositsAccountData.currency;
    });
    if (this.router.url.includes('clients')) {
      this.entityType = 'Client';
    } else if (this.router.url.includes('groups')) {
      this.entityType = 'Group';
    } else if (this.router.url.includes('centers')) {
      this.entityType = 'Center';
    }
  }

  /**
   * A reinvested FD always keeps the same client/group/center as the account it came from, so the
   * counterpart account's view page sits at the same route -- only the account-id segment differs.
   */
  private siblingAccountLink(targetAccountId: number): string | null {
    const segments = this.router.url.split('?')[0].split('/').filter(Boolean);
    const idx = segments.indexOf('fixed-deposits-accounts');
    if (idx === -1) return null;
    return '/' + segments.slice(0, idx + 1).join('/') + '/' + targetAccountId + '/general';
  }

  get reinvestedFromLink(): string | null {
    const id = this.fixedDepositsAccountData?.reinvestedFromAccountId;
    return id ? this.siblingAccountLink(id) : null;
  }

  get reinvestedIntoLink(): string | null {
    const id = this.fixedDepositsAccountData?.reinvestedIntoAccountId;
    return id ? this.siblingAccountLink(id) : null;
  }

  /** FD Special never compounds -- every month's interest is transferred out to the linked savings
   * account instead of growing this account's own balance, so its "Maturity Amount" is just the
   * principal, not principal-plus-interest (see FixedDepositAccount#updateMaturityDateAndAmount).
   */
  get isSpecialFixedDeposit(): boolean {
    return this.fixedDepositsAccountData?.fdType === 'SPECIAL';
  }

  /** Real, engine-computed period-by-period interest schedule for FD Special (see FixedDepositAccountsApiResource#retrieveOne). */
  get projectedInterestSchedule(): Array<{ fromDate: any; toDate: any; interestAmount: number; paid: boolean }> {
    return this.fixedDepositsAccountData?.projectedInterestSchedule ?? [];
  }

  get paidPeriodsCount(): number {
    return this.projectedInterestSchedule.filter((period) => period.paid).length;
  }

  /** Opens the full month-wise schedule in a popup rather than always inline -- a 24+ month term makes
   * for a long table that would otherwise push every other card on this tab down the page. */
  openInterestSchedule(): void {
    this.dialog.open(InterestScheduleDialogComponent, {
      width: '680px',
      data: {
        schedule: this.projectedInterestSchedule,
        currencyCode: this.currency?.code
      }
    });
  }

  /** Backend-computed sum of the schedule (see FixedDepositAccountsApiResource#retrieveOne) -- the single
   * source of truth, not a client-side re-sum of the schedule array. */
  get totalProjectedInterest(): number | null {
    return this.fixedDepositsAccountData?.totalProjectedInterest ?? null;
  }

  /**
   * The first NOT-YET-PAID period's real amount -- not just index 0, which would keep showing an
   * already-posted-and-transferred period's amount as "next" forever once the account has any real
   * history. Deliberately has NO rate/12 fallback: that would quietly present an inaccurate money figure
   * as if it were the real one. If the schedule is missing, or every period is already paid, the row is
   * hidden instead.
   */
  get nextInterestPayout(): number | null {
    return this.projectedInterestSchedule.find((period) => !period.paid)?.interestAmount ?? null;
  }

  /** What the customer ends up with overall across the FD's whole life: the principal returned by the FD
   * itself at maturity, PLUS every month's interest already paid out to the linked savings account along
   * the way. Backend-computed (see FixedDepositAccountsApiResource#retrieveOne), same as maturityAmount
   * itself, rather than derived here from the schedule array. */
  get totalValueAtMaturity(): number | null {
    return this.fixedDepositsAccountData?.totalValueAtMaturity ?? null;
  }
}