/**
 * 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 { DatePipe, DecimalPipe } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { ActivatedRoute, Router } from '@angular/router';
import { MatButtonModule } from '@angular/material/button';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import { MatSelectModule } from '@angular/material/select';
import { MatProgressBarModule } from '@angular/material/progress-bar';
import { MatPaginatorModule, PageEvent } from '@angular/material/paginator';
import { MatSnackBar } from '@angular/material/snack-bar';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { I4cService, i4cErrorMessage } from '../i4c.service';
import { ALL_DATES, I4cDateRange, I4cDateRangeComponent } from '../i4c-date-range/i4c-date-range.component';

/** Every complaint I4C has pushed to the bank, newest first. */
@Component({
  selector: 'mifosx-i4c-requests',
  templateUrl: './i4c-requests.component.html',
  styleUrls: ['./i4c-requests.component.scss'],
  imports: [
    DatePipe,
    DecimalPipe,
    FormsModule,
    MatButtonModule,
    MatFormFieldModule,
    MatInputModule,
    MatSelectModule,
    MatProgressBarModule,
    MatPaginatorModule,
    I4cDateRangeComponent,
    FaIconComponent
  ]
})
export class I4cRequestsComponent implements OnInit {
  private i4c = inject(I4cService);
  private route = inject(ActivatedRoute);
  private router = inject(Router);
  private snackBar = inject(MatSnackBar);

  readonly statuses = [
    'RECEIVED',
    'PROCESSING',
    'RETRY',
    'PROCESSED'
  ];
  rows: any[] = [];
  status = '';
  search = '';
  subCategory = '';
  layer = '';
  response = '';
  dates: I4cDateRange = { ...ALL_DATES };
  total = 0;
  pageIndex = 0;
  pageSize = 20;
  readonly pageSizes = [
    10,
    20,
    50,
    100
  ];
  loading = false;
  error = '';

  // Popup Window Modal state
  selectedComplaint: any = null;
  detailLoading = false;
  detailError = '';
  modalTab: 'overview' | 'incidents' | 'findings' | 'outbox' | 'payloads' = 'overview';
  openFindingJsonId: number | null = null;
  reprocessing = false;
  retryingOutboxId: number | null = null;
  copiedId = '';

  ngOnInit(): void {
    this.status = this.route.snapshot.queryParamMap.get('status') || '';
    this.load();
  }

  /** Reload the current page; a changed filter passes `fromFirstPage` so the officer lands on page one. */
  load(fromFirstPage = false): void {
    if (fromFirstPage) {
      this.pageIndex = 0;
    }
    this.loading = true;
    this.error = '';
    this.i4c
      .requests({
        status: this.status,
        search: this.search.trim(),
        subCategory: this.subCategory.trim(),
        layer: this.layer,
        response: this.response,
        fromDate: this.dates.fromDate,
        toDate: this.dates.toDate,
        offset: this.pageIndex * this.pageSize,
        limit: this.pageSize
      })
      .subscribe({
        next: (page) => {
          this.rows = page.pageItems;
          this.total = page.totalFilteredRecords;
          this.loading = false;
        },
        error: (e) => {
          this.error = i4cErrorMessage(e);
          this.loading = false;
        }
      });
  }

  setStatus(s: string): void {
    this.status = s;
    this.load(true);
  }

  onPage(e: PageEvent): void {
    this.pageIndex = e.pageIndex;
    this.pageSize = e.pageSize;
    this.load();
  }

  onDates(range: I4cDateRange): void {
    this.dates = range;
    this.load(true);
  }

  get hasFilters(): boolean {
    return !!(
      this.status ||
      this.search ||
      this.subCategory ||
      this.layer ||
      this.response ||
      this.dates.preset !== 'ALL'
    );
  }

  clearFilters(): void {
    this.status = '';
    this.search = '';
    this.subCategory = '';
    this.layer = '';
    this.response = '';
    this.dates = { ...ALL_DATES };
    this.load(true);
  }

  // Open in Modern Popup Window Modal
  openModal(row: any): void {
    this.detailLoading = true;
    this.detailError = '';
    this.modalTab = 'overview';
    this.openFindingJsonId = null;
    this.selectedComplaint = { ...row };

    this.i4c.request(row.id).subscribe({
      next: (full) => {
        // Keep the list figures (held amount, response status) if the detail lacks them.
        this.selectedComplaint = { ...row, ...full };
        this.detailLoading = false;
      },
      error: (e) => {
        this.detailError = i4cErrorMessage(e);
        this.detailLoading = false;
      }
    });
  }

  closeModal(): void {
    this.selectedComplaint = null;
  }

  toggleFindingJson(id: number): void {
    this.openFindingJsonId = this.openFindingJsonId === id ? null : id;
  }

  // Open in Full Page view
  openFullPage(id: number): void {
    this.closeModal();
    this.router.navigate([id], { relativeTo: this.route });
  }

  reprocessModal(id: number): void {
    this.reprocessing = true;
    this.i4c.reprocess(id).subscribe({
      next: () => {
        this.reprocessing = false;
        this.snackBar.open('Complaint queued for reprocessing.', 'OK', { duration: 4000 });
        this.openModal({ id });
        this.load();
      },
      error: (e) => {
        this.reprocessing = false;
        this.snackBar.open(i4cErrorMessage(e), 'Close', { duration: 6000 });
      }
    });
  }

  retryOutboxItem(id: number): void {
    this.retryingOutboxId = id;
    this.i4c.retryOutbox(id).subscribe({
      next: (r) => {
        this.retryingOutboxId = null;
        this.snackBar.open(r?.sent ? 'Delivered to I4C.' : 'Queued for retry.', 'OK', { duration: 4000 });
        if (this.selectedComplaint?.id) {
          this.openModal({ id: this.selectedComplaint.id });
        }
      },
      error: (e) => {
        this.retryingOutboxId = null;
        this.snackBar.open(i4cErrorMessage(e), 'Close', { duration: 6000 });
      }
    });
  }

  copyAck(text: string, id: string, event?: Event): void {
    if (event) {
      event.stopPropagation();
    }
    if (!text) {
      return;
    }
    navigator.clipboard.writeText(text);
    this.copiedId = id;
    this.snackBar.open(`Copied: ${text}`, 'OK', { duration: 2500 });
    setTimeout(() => {
      if (this.copiedId === id) {
        this.copiedId = '';
      }
    }, 2000);
  }

  /** What a section 6 status_code means, as I4C reads it. */
  statusCodeMeaning(code: string): string {
    switch (code) {
      case '00':
        return 'Success';
      case '01':
        return 'Record not found';
      case '02':
        return 'Invalid RRN';
      case '70010':
        return 'Not processed';
      default:
        return code ? 'Code ' + code : 'No code';
    }
  }

  statusCodeClass(code: string): string {
    return code === '00' ? 'i4c-badge--green' : code === '01' || code === '02' ? 'i4c-badge--amber' : 'i4c-badge--red';
  }

  prettyJson(val: any): string {
    if (!val) {
      return '';
    }
    try {
      const parsed = typeof val === 'string' ? JSON.parse(val) : val;
      return JSON.stringify(parsed, null, 2);
    } catch {
      return String(val);
    }
  }

  statusClass(status: string): string {
    switch (status) {
      case 'PROCESSED':
        return 'i4c-badge--green';
      case 'RETRY':
        return 'i4c-badge--red';
      case 'PROCESSING':
      case 'RECEIVED':
        return 'i4c-badge--amber';
      default:
        return '';
    }
  }

  responseClass(status: string): string {
    switch (status) {
      case 'SENT':
        return 'i4c-badge--green';
      case 'FAILED':
        return 'i4c-badge--red';
      case 'PENDING':
      case 'SENDING':
        return 'i4c-badge--amber';
      default:
        return '';
    }
  }

  outcomeClass(outcome: string): string {
    switch (outcome) {
      case 'HELD':
        return 'i4c-badge--green';
      case 'SHORT':
        return 'i4c-badge--amber';
      case 'NOT_FOUND':
      case 'FAILED':
        return 'i4c-badge--red';
      default:
        return '';
    }
  }

  holdFor(incidentId: number): any {
    return (this.selectedComplaint?.holds || []).find((h: any) => h.incident_id === incidentId);
  }
}