// ignore_for_file: avoid_print

import 'dart:async';

import 'package:didvan/config/auth_config.dart';
import 'package:didvan/constants/assets.dart';
import 'package:didvan/models/category.dart';
import 'package:didvan/models/enums.dart';
import 'package:didvan/models/overview_data.dart';
import 'package:didvan/providers/core.dart';
import 'package:didvan/routes/routes.dart';
import 'package:didvan/services/auth/jwt_utils.dart';
import 'package:didvan/services/auth/token_storage.dart';
import 'package:didvan/services/content/content_service.dart';
import 'package:didvan/services/network/request.dart';
import 'package:didvan/services/network/request_helper.dart';
import 'package:flutter/material.dart';

class MenuItemType {
  final String label;
  final String asset;
  final String link;

  MenuItemType({
    required this.label,
    required this.asset,
    required this.link,
  });
}

class HomeState extends CoreProvier {
  int _currentPageIndex = 0;
  String search = '';
  String lastSearch = '';
  Timer? _debounce;
  String? startDate;
  String? endDate;
  int page = 1;
  int lastPage = 1;
  final List<CategoryData> selectedCats = [];
  final List<OverviewData> results = [];
  late TabController tabController;
  int unreadCount = 0;
  final FocusNode searchFieldFocusNode = FocusNode();

  bool _canView(String type) {
    final token = TokenStorage.accessToken ?? '';
    if (token.isEmpty) return true;
    return JwtUtils.canView(token, type);
  }

  String? _accessTypeForMenuItem(MenuItemType item) {
    switch (item.link) {
      case Routes.news:
        return 'news';
      case Routes.radars:
        return 'radar';
      case Routes.videocasts:
        return 'videocast';
      case Routes.podcasts:
        return 'podcast';
      case Routes.infography:
        return 'infography';
      case Routes.aiSection:
        return 'hoshan';
    }

    if (item.link.contains('trend.didvan')) return 'trend';
    if (item.link.contains('tech.didvan')) return 'technology';
    if (item.link.contains('risk.didvan')) return 'risk';
    if (item.link.contains('startup.didvan')) return 'startup';
    if (item.link.contains('opportunity-threat.didvan')) return 'swot';
    return null;
  }

  List<MenuItemType> _filterMenuItemsByAccess(List<MenuItemType> items) {
    return items.where((item) {
      final accessType = _accessTypeForMenuItem(item);
      return accessType == null || _canView(accessType);
    }).toList();
  }

  void onSearchChanged(String query) {
    if (_debounce?.isActive ?? false) _debounce?.cancel();

    _debounce = Timer(const Duration(milliseconds: 1500), () {
      if (lastSearch != query && query.length >= 2) {
        search = query;
        searchAll(page: 1);
      }
    });
  }

  void clearSearch() {
    if (_debounce?.isActive ?? false) _debounce?.cancel();

    search = '';
    lastSearch = '';
    results.clear();
    notifyListeners();
  }

  void resetFilters(bool isInit) {
    startDate = null;
    endDate = null;
    selectedCats.clear();
    search = '';
    lastSearch = '';
    if (!isInit) {
      searchAll(page: 1);
    }
  }

  set currentPageIndex(int value) {
    _currentPageIndex = value;
    notifyListeners();
  }

  int get currentPageIndex => _currentPageIndex;

  List<MenuItemType> menuItems = [];
  List<CategoryData> categories = [];

  bool get filtering =>
      selectedCats.isNotEmpty ||
      startDate != null ||
      endDate != null ||
      search.isNotEmpty;

  /// TODO(backend-migration): endpoint قدیمی `api.didvan.app/home/mark/v2`
  /// در دسترس نیست. پس از افزوده شدن endpoint مشابه در api2.didvan.com
  /// برای bookmark filtering، این متد باید به ContentService منتقل شود
  /// (مثلا یک پارامتر `bookmarkedBy=<userId>` در `GET /contents`).
  Future<void> searchMarks({required int page}) async {
    this.page = page;
    if (page == 1) {
      results.clear();
      appState = AppState.busy;
    }
    lastSearch = search;
    final service = RequestService(
      RequestHelper.searchMarks(
        page: page,
        search: search,
        types: selectedCats.map((e) => e.id).toList(),
        startDate: startDate,
        endDate: endDate,
      ),
    );
    await service.httpGet();
    if (service.isSuccess) {
      lastPage = service.result['lastPage'];
      results.addAll(
        List<OverviewData>.from(
          service.result['contents'].map(
            (e) => OverviewData.fromJson(e),
          ),
        ),
      );
      lastPage = service.result['lastPage'];
      appState = AppState.idle;
      return;
    }
    appState = AppState.failed;
  }

  Future<void> searchAll({required int page}) async {
    this.page = page;
    if (page == 1) {
      results.clear();
      appState = AppState.busy;
    }
    lastSearch = search;

    final isSwotSelected = selectedCats.any((element) => element.id == 8);
    final hasLegacyCategory = selectedCats
        .any((element) => const [1, 2, 3, 5, 7].contains(element.id));

    if (isSwotSelected) {
      await _searchSwot(page);
      return;
    }

    if (hasLegacyCategory) {
      // TODO(backend-migration): این دسته‌بندی‌ها هنوز به api.didvan.app
      // متصلند که در دسترس نیست. پس از افزوده شدن endpoint مشابه در
      // api2.didvan.com، این شاخه را به ContentService منتقل کنید (مثلا
      // فیلتر بر اساس category یا tag).
      if (AuthConfig.useLegacyApi) {
        await _searchLegacy(page);
      } else {
        await _searchNewContents(page);
      }
      return;
    }

    await _searchNewContents(page);
  }

  Future<void> _searchNewContents(int page) async {
    final result = await ContentService.instance.getContents(
      page: page,
      limit: 15,
      search: search.isEmpty ? null : search,
      filterStatus: '\$in:accepted,published',
      // publishedAt;
      sortBy: const [MapEntry('createdAt', 'DESC')],
    );

    if (!result.isSuccess || result.data == null) {
      print('searchNewContents failed: ${result.errorMessage}');
      appState = AppState.failed;
      return;
    }

    final pageData = result.data!;
    results.addAll(pageData.data.map(OverviewData.fromContentItem));
    lastPage = pageData.totalPages;
    appState = AppState.idle;
  }

  static const String _swotCategoryId = 'f0092865-e004-4031-91c3-eca1fb0c6def';

  static const String _swotVisibleStatus = '\$in:accepted,published';

  Future<void> _searchSwot(int page) async {
    try {
      final res = await ContentService.instance.getContents(
        page: page,
        limit: 15,
        search: search.isEmpty ? null : search,
        filterStatus: _swotVisibleStatus,
        categoryId: _swotCategoryId,
        sortBy: const [MapEntry('createdAt', 'DESC')],
      );
      if (!res.isSuccess || res.data == null) {
        appState = AppState.failed;
        return;
      }
      final data = res.data!;
      results.addAll(data.data.map((c) => OverviewData(
            id: c.id.hashCode,
            keycloakId: c.id,
            title: c.title,
            image: c.coverImage ?? '',
            description: c.summary ?? '',
            createdAt: c.publishedAt?.toIso8601String() ?? '',
            type: 'swot',
            marked: c.isBookmarked,
            liked: c.isLiked,
            likes: c.likeCount,
            comments: 0,
            forManagers: false,
            link: OverviewData.webLinkForCategory(_swotCategoryId, c.id),
          )));
      lastPage = data.totalPages;
      appState = AppState.idle;
    } catch (e) {
      print('Error fetching SWOT items: $e');
      appState = AppState.failed;
    }
  }

  Future<void> _searchLegacy(int page) async {
    final service = RequestService(
      RequestHelper.searchAll(
        page: page,
        search: search,
        endDate: endDate,
        types: selectedCats.map((e) => e.id).toList(),
        startDate: startDate,
      ),
    );
    await service.httpGet();
    if (service.isSuccess) {
      lastPage = service.result['lastPage'];
      unreadCount = service.result['unread'] ?? unreadCount;
      results.addAll(
        List<OverviewData>.from(
          service.result['contents'].map(
            (e) => OverviewData.fromJson(e),
          ),
        ),
      );
      lastPage = service.result['lastPage'];
      appState = AppState.idle;
      return;
    }
    appState = AppState.failed;
  }

  final categoryFilters = [
    CategoryData(id: 1, label: 'پویش افق'),
    CategoryData(id: 2, label: 'دنیای فولاد'),
    CategoryData(id: 3, label: 'رسانه'),
    CategoryData(id: 5, label: 'رادارهای استراتژیک'),
    // CategoryData(id: 6, label: 'سها'), // حذف شده
    CategoryData(id: 8, label: 'بایدها و نبایدها'), // اضافه شده
    CategoryData(id: 7, label: 'ماهنامه تحلیلی'),
  ];

  void refresh() async {
    menuItems = _filterMenuItemsByAccess([
      MenuItemType(
        label: 'آمار و داده',
        asset: Assets.stats,
        link: 'tab-3',
      ),
      MenuItemType(
        label: 'دنیای فولاد',
        asset: Assets.fooladWorld,
        link: Routes.news,
      ),
      MenuItemType(
        label: 'پویش افق',
        asset: Assets.ofogh,
        link: Routes.radars,
      ),
      MenuItemType(
        label: 'ویدیوکست',
        asset: Assets.videocast,
        link: Routes.videocasts,
      ),
      MenuItemType(
        label: 'پادکست',
        asset: Assets.podcast,
        link: Routes.podcasts,
      ),
      MenuItemType(
        label: 'اینفوگرافی',
        asset: Assets.infography,
        link: Routes.infography,
      ),
      MenuItemType(
        label: 'رادار روند',
        asset: Assets.trend,
        link: 'https://trend.didvan.app/',
      ),
      MenuItemType(
        label: 'رادار تکنولوژی',
        asset: Assets.tech,
        link: 'https://tech.didvan.app/',
      ),
      MenuItemType(
        label: 'رادار ریسک',
        asset: Assets.risk,
        link: 'https://risk.didvan.app/',
      ),
      MenuItemType(
        label: 'رادار استارت‌آپ',
        asset: Assets.startup,
        link: 'https://startup.didvan.app/',
      ),
      MenuItemType(
        label: 'سها',
        asset: Assets.saha,
        // Points at the new "My Saha panels" landing on the panel origin.
        // The WebView already injects Keycloak auth cookies on .didvan.com,
        // so the page loads authenticated and only shows panels the user is
        // actually a member of.
        link: 'https://app.didvan.com/saha',
      ),
      MenuItemType(
        label: 'هوشان',
        asset: Assets.ai,
        link: Routes.aiSection,
      ),
      MenuItemType(
        label: 'فرصت و تهدید',
        asset: Assets.hugeideas,
        link:
            'http://opportunity-threat.didvan.com/?accessToken=${RequestService.token}',
      ),
    ]);

    categories = [
      CategoryData(
        id: 1,
        label: 'اقتصادی',
        asset: Assets.economicCategoryIcon,
      ),
      CategoryData(
        id: 2,
        label: 'سیاسی',
        asset: Assets.politicalCategoryIcon,
      ),
      CategoryData(
        id: 3,
        label: 'فناوری',
        asset: Assets.techCategoryIcon,
      ),
      CategoryData(
        id: 4,
        label: 'کسب و کار',
        asset: Assets.businessCategoryIcon,
      ),
      CategoryData(
        id: 5,
        label: 'زیست‌محیطی',
        asset: Assets.enviromentalCategoryIcon,
      ),
      CategoryData(
        id: 6,
        label: 'اجتماعی',
        asset: Assets.socialCategoryIcon,
      ),
      CategoryData(
        id: 1,
        label: 'اقتصادی',
        asset: Assets.economicCategoryIcon,
      ),
      CategoryData(
        id: 2,
        label: 'سیاسی',
        asset: Assets.politicalCategoryIcon,
      ),
      CategoryData(
        id: 3,
        label: 'فناوری',
        asset: Assets.techCategoryIcon,
      ),
      CategoryData(
        id: 4,
        label: 'کسب و کار',
        asset: Assets.businessCategoryIcon,
      ),
    ];
    Future.delayed(Duration.zero, notifyListeners);
  }

  @override
  void dispose() {
    _debounce?.cancel();
    searchFieldFocusNode.dispose();
    super.dispose();
  }
}