import 'dart:async';

import 'package:didvan/config/auth_config.dart';
import 'package:didvan/models/enums.dart';
import 'package:didvan/models/overview_data.dart';
import 'package:didvan/models/requests/studio.dart';
import 'package:didvan/models/slider_data.dart';
import 'package:didvan/providers/core.dart';
import 'package:didvan/services/app_initalizer.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:collection/collection.dart';

class PodcastsState extends CoreProvier {
  final List<OverviewData> studios = [];
  final List<SliderData> sliders = [];

  String? startDate;
  String? endDate;

  String search = '';
  String lastSearch = '';
  int page = 1;
  int lastPage = 1;

  int selectedSortTypeIndex = 0;

  bool _videosSelected = true;

  bool get videosSelected => _videosSelected;

  bool get searching => search.isNotEmpty;

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

  set videosSelected(bool value) {
    if (_videosSelected == value || appState == AppState.busy) return;
    _videosSelected = value;
    selectedSortTypeIndex = 0;
    _getSliders();
    getStudios(page: page);
  }

  String get order {
    if (selectedSortTypeIndex == 0 || selectedSortTypeIndex == 1) return 'date';
    if (selectedSortTypeIndex == 2) return 'view';
    return 'comment';
  }

  String get orderString {
    if (selectedSortTypeIndex == 0) return 'جدیدترین‌ها';
    if (selectedSortTypeIndex == 1) return 'قدیمی‌ترین‌ها';
    if (selectedSortTypeIndex == 2) return 'پربازدیدترین‌ها';
    return 'پربحث‌ترین‌ها';
  }

  String get type {
    if (videosSelected) return 'video';
    return 'podcast';
  }

  void init(bool? viewPodcasts) {
    search = '';
    lastSearch = '';
    _videosSelected =
        !(AppInitializer.clickAction?.contains('podcast') == true) &&
            viewPodcasts != true;
    selectedSortTypeIndex = 0;
    Future.delayed(Duration.zero, () {
      _getSliders();
      getStudios(page: 1);
    });
  }

  Future<void> _getSliders() async {
    if (!AuthConfig.useLegacyApi) {
      sliders.clear();
      notifyListeners();
      return;
    }
    final service = RequestService(
      RequestHelper.studioSlider(type),
    );
    await service.httpGet();
    if (service.isSuccess) {
      sliders.clear();
      final sliderItems = service.result['studios'];
      for (var i = 0; i < sliderItems.length; i++) {
        sliders.add(SliderData.fromJson(sliderItems[i]));
      }
    }
    notifyListeners();
  }

  static const String _podcastCategoryId =
      '7cbe250a-d0c4-44c2-970b-c4abbdf0d6c2';

  static const String _videocastCategoryId =
      '321a1cc9-b1e0-4787-a8db-6faa9a3477c4';

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

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

    if (type == 'podcast') {
      await _getMediaFromContentService(page, _podcastCategoryId,
          isVideo: false);
      return;
    }
    if (type == 'video') {
      await _getMediaFromContentService(page, _videocastCategoryId,
          isVideo: true);
      return;
    }

    final service = RequestService(
      RequestHelper.studioOverviews(
        args: StudioRequestArgs(
          page: page,
          type: type,
          search: search,
          order: order,
          asc: selectedSortTypeIndex == 1,
          endDate: endDate?.split(' ').first,
          startDate: startDate?.split(' ').first,
        ),
      ),
    );
    await service.httpGet();
    if (service.isSuccess) {
      if (page == 1) {
        studios.clear();
      }
      lastPage = service.result['lastPage'];
      final studioItems = service.result['studios'];
      for (var i = 0; i < studioItems.length; i++) {
        studios.add(OverviewData.fromJson(studioItems[i]));
      }
      appState = AppState.idle;
      return;
    }
    appState = AppState.failed;
  }

  Future<void> _getMediaFromContentService(
    int page,
    String categoryId, {
    required bool isVideo,
  }) async {
    final res = await ContentService.instance.getContents(
      page: page,
      limit: 100,
      search: search.isEmpty ? null : search,
      filterStatus: _visibleStatusFilter,
      categoryId: categoryId,
      sortBy: [_mediaSort()],
    );

    if (!res.isSuccess || res.data == null) {
      appState = AppState.failed;
      return;
    }

    final data = res.data!;
    if (page == 1) {
      studios.clear();
    }
    final initial = data.data
        .map((c) => isVideo
            ? OverviewData.fromVideocastContent(c)
            : OverviewData.fromPodcastContent(c))
        .toList();
    studios.addAll(initial);
    lastPage = data.totalPages;

    final fetches = <Future<void>>[];
    for (var i = 0; i < studios.length; i++) {
      final ov = studios[i];
      if (ov.keycloakId == null) continue;
      if ((ov.duration != null && ov.duration! > 0) &&
          (ov.link != null && ov.link!.isNotEmpty)) {
        continue;
      }
      fetches
          .add(ContentService.instance.getContent(ov.keycloakId!).then((res) {
        if (!res.isSuccess || res.data == null) return;
        final item = res.data!;
        final newOv = isVideo
            ? OverviewData.fromVideocastContent(item)
            : OverviewData.fromPodcastContent(item);
        final idx = studios.indexWhere((e) => e.keycloakId == ov.keycloakId);
        if (idx >= 0) studios[idx] = newOv;
      }).catchError((_) {}));
    }
    await Future.wait(fetches);

    appState = AppState.idle;
    notifyListeners();
  }

  MapEntry<String, String> _mediaSort() {
    switch (selectedSortTypeIndex) {
      case 1:
        return const MapEntry('createdAt', 'ASC');
      case 2:
        return const MapEntry('readCount', 'DESC');
      case 3:
        return const MapEntry('likeCount', 'DESC');
      default:
        return const MapEntry('createdAt', 'DESC');
    }
  }

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

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