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/models/requests/radar.dart';
import 'package:didvan/providers/core.dart';
import 'package:didvan/services/content/content_service.dart';
import 'package:didvan/services/network/request.dart';
import 'package:didvan/services/network/request_helper.dart';

class RadarState extends CoreProvier {
  String search = '';
  String lastSearch = '';
  String? startDate;
  String? endDate;
  int page = 1;
  int lastPage = 1;
  int visibleCount = 4;

  bool isScrolled = false;
  bool shouldColapse = false;
  final List<CategoryData> selectedCats = [];
  List<CategoryData> categories = [];
  final List<OverviewData> radars = [];

  bool get filtering =>
      selectedCats.length > 1 || startDate != null || endDate != null;

  bool get searching => search.isNotEmpty;

  bool get isColapsed =>
      (selectedCats.length == 1 && !filtering && isScrolled) || isScrolled;

  bool get isCategorySelected => selectedCats.length == 1 && !filtering;

  void resetFilters(bool isInit) {
    startDate = null;
    endDate = null;
    selectedCats.clear();
    search = '';
    lastSearch = '';
    isScrolled = false;
    visibleCount = 4;
    if (!isInit) {
      getRadars(page: 1);
    }
  }

  void loadMore() {
    visibleCount += 4;
    if (visibleCount >= radars.length && page < lastPage) {
      getRadars(page: page + 1);
    }
    notifyListeners();
  }

  /// شناسه‌ی دسته‌ی «پویش افق» در content-service جدید.
  static const String _radarCategoryId =
      'f97fbe3f-5712-4e27-81d4-b309cf58e91c';

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

  /// نگاشتِ CategoryData.id (1..6) به کلیدِ انگلیسیِ `metadata.category`
  /// که در content-service ذخیره می‌شود.
  String _metaKeyForCatId(CategoryData c) {
    switch (c.id) {
      case 1:
        return 'economical';
      case 2:
        return 'political';
      case 3:
        return 'technology';
      case 4:
        return 'business';
      case 5:
        return 'environmental';
      case 6:
        return 'social';
      default:
        return c.label.toLowerCase();
    }
  }

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

    // مسیر جدید: از content-service با دسته‌ی «پویش افق».
    if (!AuthConfig.useLegacyApi) {
      // برای فیلتر کلاینت‌سایدِ زیر-دسته، limit را بزرگ‌تر می‌گیریم.
      final res = await ContentService.instance.getContents(
        page: page,
        limit: selectedCats.isEmpty ? 15 : 100,
        search: search.isEmpty ? null : search,
        filterStatus: _visibleStatusFilter,
        categoryId: _radarCategoryId,
        sortBy: const [MapEntry('createdAt', 'DESC')],
      );
      if (res.isSuccess && res.data != null) {
        lastPage = res.data!.totalPages;
        // فیلتر زیر-دسته (client-side):
        //  - metadata.category (legacy، تک‌ارزشی)
        //  - metadata.categories (multi-select از پنل، آرایه)
        final selectedKeys = selectedCats.map(_metaKeyForCatId).toSet();
        final filtered = selectedKeys.isEmpty
            ? res.data!.data
            : res.data!.data.where((c) {
                final mc = c.metaCategory?.toLowerCase();
                if (mc != null && selectedKeys.contains(mc)) return true;
                for (final cat in c.metaCategories) {
                  if (selectedKeys.contains(cat.toLowerCase())) return true;
                }
                return false;
              }).toList();
        radars.addAll(filtered.map(OverviewData.fromContentItem));
        if ((searching || filtering || isColapsed || isCategorySelected) &&
            page == 1) {
          shouldColapse = true;
        }
        appState = AppState.idle;
      } else {
        appState = AppState.failed;
      }
      return;
    }

    final RequestService service = RequestService(
      RequestHelper.radarOverviews(
        args: RadarRequestArgs(
          page: page,
          startDate: startDate?.split(' ').first,
          endDate: endDate?.split(' ').first,
          search: search == '' ? null : search,
          categories: selectedCats.map((e) => e.id).toList(),
        ),
      ),
    );
    await service.httpGet();
    if (service.isSuccess) {
      lastPage = service.result['lastPage'];
      final radarsList = service.result['radars'];
      for (var i = 0; i < radarsList.length; i++) {
        radars.add(OverviewData.fromJson(radarsList[i]));
      }
      if ((searching || filtering || isColapsed || isCategorySelected) &&
          page == 1) {
        shouldColapse = true;
      }
      appState = AppState.idle;
      return;
    }

    appState = AppState.failed;
  }

  Future<void> changeMark(int id, bool value, bool shouldUpdate) async {
    radars.firstWhere((element) => element.id == id).marked = value;
    if (shouldUpdate) {
      notifyListeners();
    }
  }

  Future<void> changeLike(int id, bool value, bool shouldUpdate) async {
    radars.firstWhere((element) => element.id == id).liked = value;
    if (shouldUpdate) {
      notifyListeners();
    }
  }

  void onCommentsChanged(int id, int count) {
    radars.firstWhere((radar) => radar.id == id).comments = count;
    notifyListeners();
  }

  void init() {
    resetFilters(true);
    Future.delayed(Duration.zero, () {
      getRadars(page: 1);
    });
    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,
      ),
    ];
  }
}