/**
 * 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, OnInit, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { MAT_DIALOG_DATA, MatDialogRef, MatDialogModule } from '@angular/material/dialog';
import { MatButtonModule } from '@angular/material/button';
import { MatIconModule } from '@angular/material/icon';
import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
import { catchError } from 'rxjs/operators';
import { of } from 'rxjs';
import { CashierService } from 'app/cashier/cashier.service';
import { SharesService } from 'app/shares/shares.service';
import { SettingsService } from 'app/settings/settings.service';

/**
 * Full detail for one additional-share request, opened from the Approval Center list.
 *
 * Everything a checker needs to decide without leaving the queue: the board resolution, the tranche
 * value, and — the piece a bare list row cannot show — the actual proof of funding. A cash tranche
 * shows every receipt behind it (a member paying in instalments has more than one), a savings
 * tranche shows the account already debited and its balance, so the approval is never a guess about
 * where the money came from.
 */
@Component({
  selector: 'mifosx-share-addition-request-detail-dialog',
  templateUrl: './share-addition-request-detail-dialog.component.html',
  styleUrls: ['./share-addition-request-detail-dialog.component.scss'],
  standalone: true,
  imports: [
    CommonModule,
    MatDialogModule,
    MatButtonModule,
    MatIconModule,
    MatProgressSpinnerModule
  ]
})
export class ShareAdditionRequestDetailDialogComponent implements OnInit {
  private cashierService = inject(CashierService);
  private sharesService = inject(SharesService);
  private settingsService = inject(SettingsService);

  loading = true;
  errorMsg = '';
  actioning = false;
  detail: any = null;

  public dialogRef = inject(MatDialogRef<ShareAdditionRequestDetailDialogComponent>);
  public data = inject<{ transactionId: number }>(MAT_DIALOG_DATA);

  ngOnInit(): void {
    this.cashierService
      .getShareAdditionRequest(this.data.transactionId)
      .pipe(
        catchError((err) => {
          this.errorMsg = this.readError(err, 'Could not load this request.');
          this.loading = false;
          return of(null);
        })
      )
      .subscribe((res: any) => {
        if (res) {
          this.detail = res;
        }
        this.loading = false;
      });
  }

  /** How many receipts fund this tranche — the lead one plus any further instalments. */
  get voucherCount(): number {
    return this.detail?.vouchers?.length || 0;
  }

  approve(): void {
    this.act('approveadditionalshares');
  }

  reject(): void {
    this.act('rejectadditionalshares');
  }

  private act(command: string): void {
    if (this.actioning || !this.detail) {
      return;
    }
    this.actioning = true;
    this.errorMsg = '';
    const data = {
      requestedShares: [{ id: this.detail.transactionId }],
      dateFormat: this.settingsService.dateFormat,
      locale: this.settingsService.language.code
    };
    this.sharesService
      .executeSharesAccountCommand(this.detail.shareAccountId, command, data)
      .pipe(
        catchError((err) => {
          this.errorMsg = this.readError(err, 'The request could not be actioned.');
          this.actioning = false;
          return of(null);
        })
      )
      .subscribe((res: any) => {
        if (res) {
          this.dialogRef.close(true);
        } else {
          this.actioning = false;
        }
      });
  }

  cancel(): void {
    this.dialogRef.close(false);
  }

  private readError(err: any, fallback: string): string {
    return (
      err?.error?.errors?.[0]?.defaultUserMessage ||
      err?.error?.defaultUserMessage ||
      err?.error?.developerMessage ||
      fallback
    );
  }
}