import 'package:flutter/material.dart';
import 'package:flutter_common/models/common_model.dart';
import 'package:food_hub_app/apis/moment.dart';
import 'package:food_hub_app/apis/recipe.dart';
import 'package:food_hub_app/apis/stats.dart';
import 'package:food_hub_app/models/moment.dart';
import 'package:food_hub_app/models/recipe.dart';
import 'package:food_hub_app/models/stats.dart';
import 'package:food_hub_app/utils/date_util.dart';
import 'package:food_hub_app/utils/index.dart';
import 'package:food_hub_app/views/record.dart';

class FoodProvider with ChangeNotifier {
  late RecordTab currentRecordTab = RecordTab.recipe;
  late FoodRecord recordFormItem;
  late Moment momentFormItem;

  late bool isEditing;
  bool isLoading = false;
  String? error;

  String queryCategory = '全部菜系';
  late List<String> categoryList = [];
  late List<RecipeSummary> recipeSummaryList = [];

  int selectYear = DateTime.now().year;
  DateTime selectedDay = DateTime.now();
  DateTime focusedDay = DateTime.now();

  late List<FoodRecord> recordList = [];
  late List<FoodRecord> selectRecordList = [];

  late SummaryStats summaryStats = SummaryStats(
    recipeCount: 0,
    categoryCount: 0,
    workCount: 0,
  );
  late double averageRecordCount = 0;
  late List<ChartData> recordStats = [];
  late List<ChartData> categoryStats = [];
  late List<ChartData> rankStats = [];

  List<Moment> momentList = [];
  int currentPage = 1;
  final int pageSize = 5;
  bool hasMore = true;

  void resetRecordForm() {
    recordFormItem = FoodRecord.getEmpty();
    notifyListeners();
  }

  void initRecordForm(FoodRecord record) {
    recordFormItem = record;
    notifyListeners();
  }

  void updateRecordFormItem({String? name, String? date, String? imageUrl}) {
    if (name != null) recordFormItem.name = name;
    if (date != null) recordFormItem.date = date;
    if (imageUrl != null) recordFormItem.imageUrl = imageUrl;
    notifyListeners();
  }

  void updateMomentFormItem({String? content}) {
    if (content != null) momentFormItem.content = content;
    notifyListeners();
  }

  void addMomentFormImage(List<String> imageUrls) {
    momentFormItem.imageList.addAll(imageUrls);
    notifyListeners();
  }

  void removeMomentFormImage(int index) {
    momentFormItem.imageList.removeAt(index);
    notifyListeners();
  }

  void resetMomentForm() {
    momentFormItem = Moment.getEmpty();
    notifyListeners();
  }

  void initMomentForm(Moment moment) {
    momentFormItem = moment;
    notifyListeners();
  }

  Future<void> onRecordTabChange() async {
    switch (currentRecordTab) {
      case RecordTab.recipe:
        await refreshRecipeList();
        break;
      case RecordTab.calendar:
      case RecordTab.timeline:
        await refreshRecordList();
        break;
    }
  }

  Future<void> queryCategoryList() async {
    try {
      error = null;
      notifyListeners();

      final result = await queryCategoryApi();
      categoryList.clear();
      categoryList.add('全部菜系');
      categoryList.addAll(result);
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      notifyListeners();
    }
  }

  Future<void> refreshRecipeList() async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      final category = queryCategory == '全部菜系' ? '' : queryCategory;
      final result = await queryRecipeApi(RecipeQuery(category: category));
      recipeSummaryList = result;
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> refreshRecordList() async {
    if (isLoading) return;

    if (currentRecordTab == RecordTab.recipe) return;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      late String startDate;
      late String endDate;

      switch (currentRecordTab) {
        case RecordTab.calendar:
          startDate = getFirstDayOfMonth(focusedDay);
          endDate = getLastDayOfMonth(focusedDay);
          break;
        case RecordTab.timeline:
          startDate = '$selectYear-01-01';
          endDate = '$selectYear-12-31';
          break;
        case RecordTab.recipe:
          break;
      }

      final result = await queryRecordApi(startDate, endDate);

      recordList = result;

      if (recordList.isNotEmpty) {
        selectedDay = DateTime.parse(recordList.last.date);
      } else {
        selectedDay = focusedDay;
      }

      refreshSelectRecord();
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<bool> handleRecord() async {
    if (isLoading) return true;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      if (isEditing) {
        await updateRecordApi(recordFormItem.id!, recordFormItem);
      } else {
        await addRecordApi(recordFormItem);
      }
      return true;
    } catch (e) {
      error = '处理数据失败: $e';
      debugPrint('处理数据失败: $e');
      return false;
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<bool> deleteRecord() async {
    if (isLoading) return true;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      await deleteRecordApi(recordFormItem.id!);
      return true;
    } catch (e) {
      error = '处理数据失败: $e';
      debugPrint('处理数据失败: $e');
      return false;
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  void refreshSelectRecord() {
    selectRecordList =
        recordList
            .where((record) => record.date == formatDateTime(selectedDay))
            .toList();
  }

  Future<void> refreshFoodStats() async {
    if (isLoading) return;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      final statsResult = await queryStatsApi();
      final recordStatsResult = await queryRecordStatsApi();
      final categoryStatsResult = await queryCategoryStatsApi();
      final rankStatsResult = await queryRankStatsApi();

      summaryStats = statsResult;
      recordStats = recordStatsResult;
      categoryStats = categoryStatsResult;
      rankStats = rankStatsResult;

      if (recordStats.isNotEmpty) {
        double sumValue = recordStats.fold(
          0.0,
          (sum, item) => sum + item.value,
        );
        averageRecordCount = sumValue / recordStats.length;
      }
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> queryMomentByPage({bool isRefresh = true}) async {
    if (isLoading) return;

    try {
      if (currentPage == 1) {
        isLoading = true;
      }

      error = null;
      notifyListeners();

      // 如果是刷新，重置页码
      if (isRefresh) {
        currentPage = 1;
      }

      final result = await queryMomentByPageApi(currentPage, pageSize);

      // 更新数据
      if (isRefresh) {
        momentList = result.records;
      } else {
        momentList.addAll(result.records);
      }

      // 判断是否还有更多数据
      hasMore = result.current < result.pages;
      if (hasMore) {
        currentPage++;
      }
    } catch (e) {
      error = '加载数据失败: $e';
      debugPrint('加载数据失败: $e');
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<void> loadMoreMomentList() async {
    if (hasMore && !isLoading) {
      await queryMomentByPage(isRefresh: false);
    }
  }

  Future<void> refreshMomentList() async {
    await queryMomentByPage(isRefresh: true);
  }

  Future<bool> handleMoment() async {
    if (isLoading) return true;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      if (isEditing) {
        await updateMomentApi(momentFormItem.id!, momentFormItem);
      } else {
        await addMomentApi(momentFormItem);
      }
      return true;
    } catch (e) {
      error = '处理数据失败: $e';
      debugPrint('处理数据失败: $e');
      return false;
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }

  Future<bool> deleteMoment() async {
    if (isLoading) return true;

    try {
      isLoading = true;
      error = null;
      notifyListeners();

      await deleteMomentApi(momentFormItem.id!);
      return true;
    } catch (e) {
      error = '处理数据失败: $e';
      debugPrint('处理数据失败: $e');
      return false;
    } finally {
      isLoading = false;
      notifyListeners();
    }
  }
}