/**
 * 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 { SelectionModel } from '@angular/cdk/collections';
import { switchMap } from 'rxjs/operators';
import {
  MatTableDataSource,
  MatTable,
  MatColumnDef,
  MatHeaderCellDef,
  MatHeaderCell,
  MatCellDef,
  MatCell,
  MatHeaderRowDef,
  MatHeaderRow,
  MatRowDef,
  MatRow
} from '@angular/material/table';
import { MatDialog } from '@angular/material/dialog';
import { MatIcon } from '@angular/material/icon';
import { MatCheckbox } from '@angular/material/checkbox';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';

import { TasksService } from '../../tasks.service';
import { SettingsService } from 'app/settings/settings.service';
import { Dates } from 'app/core/utils/dates';
import { FormDialogComponent } from 'app/shared/form-dialog/form-dialog.component';
import { FormfieldBase } from 'app/shared/form-dialog/formfield/model/formfield-base';
import { DatepickerBase } from 'app/shared/form-dialog/formfield/model/datepicker-base';
import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';

@Component({
  selector: 'mifosx-pending-account',
  templateUrl: './pending-account.component.html',
  styleUrls: ['./pending-account.component.scss'],
  imports: [
    ...STANDALONE_SHARED_IMPORTS,
    FaIconComponent,
    MatTable,
    MatColumnDef,
    MatHeaderCellDef,
    MatHeaderCell,
    MatCheckbox,
    MatCellDef,
    MatCell,
    MatHeaderRowDef,
    MatHeaderRow,
    MatRowDef,
    MatRow,
    MatIcon
  ]
})
export class PendingAccountComponent {
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private dialog = inject(MatDialog);
  private dateUtils = inject(Dates);
  private settingsService = inject(SettingsService);
  private tasksService = inject(TasksService);

  dataSource: MatTableDataSource<any>;
  selection: SelectionModel<any>;
  showData = false;

  displayedColumns: string[] = [
    'select',
    'accountNo',
    'clientName',
    'productName',
    'accountType',
    'officeName',
    'fieldOfficerName',
    'submittedOnDate',
    'status'
  ];

  constructor() {
    this.route.data.subscribe((data: { pendingAccountsData: any }) => {
      // status 100 = submitted and pending approval only; exclude terminated accounts
      const items = (data.pendingAccountsData?.pageItems || []).filter(
        (a: any) => a.status?.id === 100 && !a.terminateTrue
      );
      this.showData = items.length > 0;
      this.dataSource = new MatTableDataSource(items);
      this.selection = new SelectionModel(true, []);
    });
  }

  isAllSelected() {
    return this.selection.selected.length === this.dataSource.data.length;
  }

  masterToggle() {
    this.isAllSelected() ? this.selection.clear() : this.dataSource.data.forEach((row) => this.selection.select(row));
  }

  checkboxLabel(row?: any): string {
    if (!row) return `${this.isAllSelected() ? 'deselect' : 'select'} all`;
    return `${this.selection.isSelected(row) ? 'deselect' : 'select'} row`;
  }

  applyFilter(filterValue: string = '') {
    this.dataSource.filter = filterValue.trim().toLowerCase();
  }

  navigateToAccount(account: any): void {
    const clientId = account.clientId;
    const accountId = account.id;
    const depositTypeId = account.depositType?.id;
    let path: string;
    if (account.accountType === 'Current') {
      path = `/clients/${clientId}/current-accounts/${accountId}`;
    } else if (depositTypeId === 200) {
      path = `/clients/${clientId}/fixed-deposits-accounts/${accountId}`;
    } else if (depositTypeId === 300) {
      path = `/clients/${clientId}/recurring-deposits-accounts/${accountId}`;
    } else {
      path = `/clients/${clientId}/savings-accounts/${accountId}`;
    }
    this.router.navigate([path]);
  }

  approveAccounts() {
    if (!this.selection.hasValue()) return;
    const formfields: FormfieldBase[] = [
      new DatepickerBase({
        controlName: 'approvedOnDate',
        label: 'Approved On Date',
        value: new Date(),
        type: 'datetime-local',
        required: true
      })
    ];
    const dialogRef = this.dialog.open(FormDialogComponent, {
      data: {
        title: 'Enter Approval Date',
        layout: { addButtonText: 'Confirm' },
        formfields,
        pristine: false
      }
    });
    dialogRef.afterClosed().subscribe((response: any) => {
      if (response?.data) {
        this.bulkApprove(response.data);
      }
    });
  }

  rejectAccounts() {
    if (!this.selection.hasValue()) return;
    const formfields: FormfieldBase[] = [
      new DatepickerBase({
        controlName: 'rejectedOnDate',
        label: 'Rejected On Date',
        value: new Date(),
        type: 'datetime-local',
        required: true
      })
    ];
    const dialogRef = this.dialog.open(FormDialogComponent, {
      data: {
        title: 'Enter Rejection Date',
        layout: { addButtonText: 'Confirm' },
        formfields,
        pristine: false
      }
    });
    dialogRef.afterClosed().subscribe((response: any) => {
      if (response?.data) {
        this.bulkReject(response.data);
      }
    });
  }

  private bulkReject(submittedData: any) {
    const dateFormat = this.settingsService.dateFormat;
    const locale = this.settingsService.language.code;
    const rejectedOnDate = this.dateUtils.formatDate(submittedData.value.rejectedOnDate, dateFormat);
    const payload = { rejectedOnDate, dateFormat, locale };

    const selected = this.selection.selected;
    let settled = 0;
    selected.forEach((account: any) => {
      const depositTypeId = account.depositType?.id;
      let reject$;
      if (account.accountType === 'Current') {
        reject$ = this.tasksService.rejectCurrentAccount(account.id, payload);
      } else if (depositTypeId === 200) {
        reject$ = this.tasksService.rejectFDAccount(account.id, payload);
      } else if (depositTypeId === 300) {
        reject$ = this.tasksService.rejectRDAccount(account.id, payload);
      } else {
        reject$ = this.tasksService.rejectSavingsAccount(account.id, payload);
      }
      reject$.subscribe({
        next: () => {
          settled++;
          if (settled === selected.length) {
            this.reload();
          }
        },
        error: () => {
          settled++;
          if (settled === selected.length) {
            this.reload();
          }
        }
      });
    });
  }

  /**
   * Approves an account, then immediately activates it on the same date -- Approve and Activate
   * are still two separate Fineract commands underneath (each shows up in the audit trail), but
   * the checker only sees and clicks through the one bulk action, matching what happens when
   * approving from inside an individual account (see e.g. ApproveSavingsAccountComponent).
   */
  private approveAndActivate$(account: any, approvedOnDate: string, dateFormat: string, locale: string) {
    const approvePayload = { approvedOnDate, dateFormat, locale };
    const activatePayload = { activatedOnDate: approvedOnDate, dateFormat, locale };
    const depositTypeId = account.depositType?.id;

    let approve$;
    let activate$;
    if (account.accountType === 'Current') {
      approve$ = this.tasksService.approveCurrentAccount(account.id, approvePayload);
      activate$ = () => this.tasksService.activateCurrentAccount(account.id, activatePayload);
    } else if (depositTypeId === 200) {
      approve$ = this.tasksService.approveFDAccount(account.id, approvePayload);
      activate$ = () => this.tasksService.activateFDAccount(account.id, activatePayload);
    } else if (depositTypeId === 300) {
      approve$ = this.tasksService.approveRDAccount(account.id, approvePayload);
      activate$ = () => this.tasksService.activateRDAccount(account.id, activatePayload);
    } else {
      approve$ = this.tasksService.approveSavingsAccount(account.id, approvePayload);
      activate$ = () => this.tasksService.activateSavingsAccount(account.id, activatePayload);
    }
    return approve$.pipe(switchMap(activate$));
  }

  private bulkApprove(submittedData: any) {
    const dateFormat = this.settingsService.dateFormat;
    const locale = this.settingsService.language.code;
    const approvedOnDate = this.dateUtils.formatDate(submittedData.value.approvedOnDate, dateFormat);

    const selected = this.selection.selected;
    let settled = 0;
    selected.forEach((account: any) => {
      this.approveAndActivate$(account, approvedOnDate, dateFormat, locale).subscribe({
        next: () => {
          settled++;
          if (settled === selected.length) {
            this.reload();
          }
        },
        error: () => {
          settled++;
          if (settled === selected.length) {
            this.reload();
          }
        }
      });
    });
  }

  formatDate(date: any): string {
    if (!date) return '';
    if (Array.isArray(date)) {
      const d = new Date(date[0], date[1] - 1, date[2]);
      return d.toLocaleDateString('en-IN', { day: '2-digit', month: 'short', year: 'numeric' });
    }
    const d = new Date(date);
    if (!isNaN(d.getTime())) {
      return d.toLocaleDateString('en-IN', { day: '2-digit', month: 'short', year: 'numeric' });
    }
    return date;
  }

  reload() {
    const url = this.router.url;
    this.router
      .navigateByUrl('/checker-inbox-and-tasks', { skipLocationChange: true })
      .then(() => this.router.navigate([url]));
  }
}