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/news.dart';
import 'package:didvan/providers/core.dart';
import 'package:didvan/services/network/request.dart';
import 'package:didvan/services/network/request_helper.dart';

class NewsState extends CoreProvier {
  String search = '';
  String lastSearch = '';
  String? startDate;
  String? endDate;
  int page = 1;
  int lastPage = 0;
  int visibleCount = 4;
  final List<CategoryData> selectedCats = [];
  List<CategoryData> categories = [];
  final List<OverviewData> news = [];

  void init() {
    search = '';
    lastSearch = '';
    startDate = null;
    endDate = null;
    Future.delayed(Duration.zero, () {
      getNews(page: 1);
    });
    visibleCount = 4;

    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,
      ),
    ];
  }

  void resetFilters() {
    startDate = null;
    endDate = null;
    visibleCount = 4;
    getNews(page: 1);
  }

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

  Future<void> getNews({
    required int page,
  }) async {
    this.page = page;
    if (this.page == 1) {
      news.clear();
    }
    if (search != '') {
      lastSearch = search;
    }
    lastSearch = search;
    if (page == 1) {
      appState = AppState.busy;
    }
    final service = RequestService(
      RequestHelper.newsOverviews(
        args: NewsRequestArgs(
          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 newsList = service.result['news'];
      for (var i = 0; i < newsList.length; i++) {
        news.add(OverviewData.fromJson(newsList[i]));
      }
      appState = AppState.idle;
      return;
    }
    appState = AppState.failed;
  }

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

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

  bool get isFiltering =>
      startDate != null || endDate != null || selectedCats.isNotEmpty;
}