/**
 * 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 { MatIconModule } from '@angular/material/icon';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { of } from 'rxjs';
import { catchError } from 'rxjs/operators';
import { CashierService } from '../cashier.service';
import { businessToday } from 'app/core/utils/business-today';

interface BranchDenomRow {
  denominationId: number;
  denominationValue: number;
  kind: string;
  vaultCount: number;
  cashierCount: number;
  totalCount: number;
  totalAmount: number;
  /** Notes taken in less notes given out by exchanges on the day. */
  exchangeNet: number;
}

interface BranchPosition {
  officeId: number;
  officeName: string;
  asOfDate: string;
  vaultHasBreakdown: boolean;
  vaultAmount: number;
  cashiersAmount: number;
  totalAmount: number;
  denominations: BranchDenomRow[];
}

/**
 * What the branch holds, denomination by denomination: the vault plus every cashier's drawer. An exchange
 * (a customer hands in 10 x ₹500 and leaves with 50 x ₹100) leaves the vault alone and changes a drawer, so
 * it only shows up in this total -- +10 on ₹500, -50 on ₹100.
 */
@Component({
  selector: 'mifosx-branch-cash-position',
  templateUrl: './branch-cash-position.component.html',
  styleUrls: [
    '../cashier-shared.scss',
    '../cashier-position/cashier-position.component.scss',
    './branch-cash-position.component.scss'
  ],
  standalone: true,
  imports: [
    CommonModule,
    MatIconModule,
    MatFormFieldModule,
    MatInputModule
  ]
})
export class BranchCashPositionComponent implements OnInit {
  private service = inject(CashierService);

  asOfDate = '';
  loading = false;
  errorMsg = '';
  position: BranchPosition | null = null;

  ngOnInit(): void {
    const d = businessToday();
    this.asOfDate = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
    this.load();
  }

  load(): void {
    this.loading = true;
    this.errorMsg = '';
    this.position = null;
    this.service
      .branchCashPosition(this.asOfDate)
      .pipe(catchError(() => of(null)))
      .subscribe((data: BranchPosition | null) => {
        this.loading = false;
        if (!data) {
          this.errorMsg = 'Could not load the branch cash position.';
          return;
        }
        this.position = data;
      });
  }

  onDateChange(value: string): void {
    this.asOfDate = value;
    this.load();
  }

  notes(): BranchDenomRow[] {
    return (this.position?.denominations || []).filter((d) => d.kind !== 'coin');
  }

  coins(): BranchDenomRow[] {
    return (this.position?.denominations || []).filter((d) => d.kind === 'coin');
  }

  /** "+10", "-50", or a dash when the day's exchanges did not touch the denomination. */
  movement(net: number): string {
    if (!net) return '—';
    return net > 0 ? `+${net}` : `${net}`;
  }
}