/**
 * 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, Input, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Router } from '@angular/router';
import { ClerkUiStateService } from '../../cashier/clerk-ui-state.service';
import { ChequeBookService } from '../../chequebook/chequebook.service';

/** Read-only cheque-book view for the account currently loaded on the Clerk Dashboard —
 *  reached via the "Cheque Book" entry in the Account Facilities dropdown. */
@Component({
  selector: 'mifosx-clerk-cheque-book',
  standalone: true,
  imports: [CommonModule],
  styleUrl: './cheque-book.component.scss',
  template: `
    <div class="cb-page">
      <!-- Header -->
      <div class="cb-header">
        <div class="cb-header__left">
          <svg
            class="cb-header__icon"
            width="26"
            height="26"
            viewBox="0 0 24 24"
            fill="none"
            stroke="currentColor"
            stroke-width="1.8"
          >
            <rect x="1" y="4" width="22" height="16" rx="2" />
            <line x1="1" y1="10" x2="23" y2="10" />
          </svg>
          <div>
            <div class="cb-header__title">Cheque Book</div>
            @if (accountLoaded) {
              <div class="cb-header__sub">
                {{ accountNo }}
                @if (clientName) {
                  &nbsp;&middot;&nbsp;{{ clientName }}
                }
                @if (books.length > 0) {
                  &nbsp;&middot;&nbsp;{{ books.length }} book{{ books.length === 1 ? '' : 's' }}
                }
              </div>
            } @else {
              <div class="cb-header__sub">View cheque books issued for the loaded account.</div>
            }
          </div>
        </div>
        @if (!embedded) {
          <button type="button" class="cb-btn" (click)="goBack()">
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5">
              <polyline points="15 18 9 12 15 6" />
            </svg>
            Back to Dashboard
          </button>
        }
      </div>

      @if (!accountLoaded) {
        <div class="cb-empty">
          <div class="cb-empty__icon">
            <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="#475569" stroke-width="1.3">
              <rect x="1" y="4" width="22" height="16" rx="2" />
              <line x1="1" y1="10" x2="23" y2="10" />
            </svg>
          </div>
          <p class="cb-empty__title">No Account Loaded</p>
          <p class="cb-empty__sub">Search an account on the Clerk Dashboard first.</p>
          @if (!embedded) {
            <button class="cb-empty__btn" (click)="goBack()">Go to Dashboard</button>
          }
        </div>
      } @else {
        @if (!facilityActive) {
          <div class="cb-warn-banner">Cheque Book facility is not active for this account.</div>
        }

        @if (loading) {
          <div class="cb-status-msg">Loading cheque books&hellip;</div>
        } @else if (error) {
          <div class="cb-status-msg cb-status-msg--error">{{ error }}</div>
        } @else if (books.length === 0) {
          <div class="cb-no-books">
            <svg width="36" height="36" viewBox="0 0 24 24" fill="none" stroke="#cbd5e1" stroke-width="1.3">
              <rect x="1" y="4" width="22" height="16" rx="2" />
              <line x1="1" y1="10" x2="23" y2="10" />
            </svg>
            <span>No cheque book issued for this account</span>
          </div>
        } @else {
          <div class="cb-table-card">
            <div class="cb-table-wrap">
              <table class="cb-table">
                <thead>
                  <tr>
                    <th>Series</th>
                    <th>Books</th>
                    <th>Leaves</th>
                    <th>Status</th>
                    <th>Requested</th>
                    <th></th>
                  </tr>
                </thead>
                <tbody>
                  @for (b of books; track b.id) {
                    <tr class="cb-row" (click)="viewBook(b)">
                      <td>{{ b.seriesCode }}</td>
                      <td class="cb-cell--num">{{ b.noOfBooks }}</td>
                      <td class="cb-cell--num">{{ b.totalLeaves ?? '&#8212;' }}</td>
                      <td>
                        <span
                          class="cb-pill"
                          [class.cb-pill--ok]="b.status === 'ISSUED'"
                          [class.cb-pill--bad]="b.status === 'REJECTED' || b.status === 'WITHDRAWN'"
                          [class.cb-pill--neutral]="
                            b.status !== 'ISSUED' && b.status !== 'REJECTED' && b.status !== 'WITHDRAWN'
                          "
                          >{{ b.status }}</span
                        >
                      </td>
                      <td class="cb-cell--date">{{ b.requestedDate ?? '&#8212;' }}</td>
                      <td class="cb-cell--action">View &rsaquo;</td>
                    </tr>
                  }
                </tbody>
              </table>
            </div>
          </div>
        }
      }
    </div>
  `
})
export class ClerkChequeBookComponent implements OnInit {
  private clerkUiState = inject(ClerkUiStateService);
  private chequeBookService = inject(ChequeBookService);
  private router = inject(Router);

  @Input() embedded = false;

  accountLoaded = false;
  accountNo = '';
  clientName = '';
  facilityActive = true;
  books: any[] = [];
  loading = false;
  error = '';

  ngOnInit(): void {
    const s = this.clerkUiState.snapshot;
    this.accountLoaded = s.accountLoaded;
    if (!this.accountLoaded) {
      return;
    }

    this.accountNo = s.savedAccount?.accountDetails?.accountNo ?? s.savedRow?.acNo ?? '';
    const clientDetails = s.savedAccount?.clientDetails;
    this.clientName = clientDetails ? `${clientDetails.firstname ?? ''} ${clientDetails.lastname ?? ''}`.trim() : '';
    const facility = s.facilities.find((f) => f.label === 'Cheque Book');
    this.facilityActive = facility ? facility.active : true;

    const accountType = this.toChequeAccountType(s.savedRow?.acTyp);
    const accountId = s.savedAccount?.accountDetails?.id;
    if (accountId) {
      this.loadBooks(accountType, accountId);
    } else if (this.accountNo) {
      this.resolveAccountId(accountType, this.accountNo);
    }
  }

  /** Cheque-book series/books are only ever SAVINGS or CURRENT — CA/CB is the clerk's UI code for current accounts. */
  private toChequeAccountType(acTyp?: string): string {
    const t = (acTyp || '').toUpperCase();
    return t === 'CA' || t === 'CB' ? 'CURRENT' : 'SAVINGS';
  }

  private resolveAccountId(accountType: string, accountNo: string): void {
    this.loading = true;
    this.chequeBookService.searchAccountByNo(accountType, accountNo).subscribe({
      next: (res: any) => {
        const items = res?.pageItems ?? (Array.isArray(res) ? res : []);
        const match = items.find((i: any) => i.accountNo === accountNo) ?? (items.length === 1 ? items[0] : null);
        if (match) {
          this.loadBooks(accountType, match.id);
        } else {
          this.loading = false;
          this.error = 'Could not resolve this account for cheque book lookup';
        }
      },
      error: () => {
        this.loading = false;
        this.error = 'Could not resolve this account for cheque book lookup';
      }
    });
  }

  private loadBooks(accountType: string, accountId: string | number): void {
    this.loading = true;
    this.chequeBookService.getBooks(accountType, accountId, undefined, undefined, 0, 50).subscribe({
      next: (res: any) => {
        this.books = res?.pageItems ?? (Array.isArray(res) ? res : []);
        this.loading = false;
      },
      error: () => {
        this.loading = false;
        this.error = 'Failed to load cheque book details';
      }
    });
  }

  viewBook(book: any): void {
    this.router.navigate([
      '/clerk/account-facilities/cheque-book',
      book.id
    ]);
  }

  goBack(): void {
    this.router.navigate(['/clerk/dashboard']);
  }
}