import { calculateNutritionSummary, deleteDietRecord, DietRecord, getDietRecords, NutritionSummary } from '@/services/dietRecords';
import { fetchBasalEnergyBurned, fetchHealthDataForDate, TodayHealthData } from '@/utils/health';
import { createAsyncThunk, createSlice, PayloadAction } from '@reduxjs/toolkit';
import dayjs from 'dayjs';

// 营养数据状态类型定义
export interface NutritionState {
  // 按日期存储的营养记录
  recordsByDate: Record<string, DietRecord[]>;

  // 按日期存储的营养摘要
  summaryByDate: Record<string, NutritionSummary>;

  // 按日期存储的健康数据（基础代谢、运动消耗等）
  healthDataByDate: Record<string, TodayHealthData>;

  // 按日期存储的基础代谢数据
  basalMetabolismByDate: Record<string, number>;

  // 加载状态
  loading: {
    records: boolean;
    delete: boolean;
    healthData: boolean;
    basalMetabolism: boolean;
  };

  // 错误信息
  error: string | null;

  // 分页信息
  pagination: {
    page: number;
    limit: number;
    total: number;
    hasMore: boolean;
  };

  // 最后更新时间
  lastUpdateTime: string | null;
}

// 初始状态
const initialState: NutritionState = {
  recordsByDate: {},
  summaryByDate: {},
  healthDataByDate: {},
  basalMetabolismByDate: {},
  loading: {
    records: false,
    delete: false,
    healthData: false,
    basalMetabolism: false,
  },
  error: null,
  pagination: {
    page: 1,
    limit: 10,
    total: 0,
    hasMore: true,
  },
  lastUpdateTime: null,
};

// 异步操作：获取营养记录
export const fetchNutritionRecords = createAsyncThunk(
  'nutrition/fetchRecords',
  async (params: {
    startDate?: string;
    endDate?: string;
    page?: number;
    limit?: number;
    append?: boolean;
  }, { rejectWithValue }) => {
    try {
      const { startDate, endDate, page = 1, limit = 10, append = false } = params;

      const response = await getDietRecords({
        startDate,
        endDate,
        page,
        limit,
      });

      return {
        ...response,
        append,
        dateKey: startDate ? dayjs(startDate).format('YYYY-MM-DD') : null,
      };
    } catch (error: any) {
      return rejectWithValue(error.message || '获取营养记录失败');
    }
  }
);

// 异步操作：删除营养记录
export const deleteNutritionRecord = createAsyncThunk(
  'nutrition/deleteRecord',
  async (params: { recordId: number; dateKey: string }, { rejectWithValue }) => {
    try {
      await deleteDietRecord(params.recordId);
      return params;
    } catch (error: any) {
      return rejectWithValue(error.message || '删除营养记录失败');
    }
  }
);

// 异步操作：获取指定日期的营养数据
export const fetchDailyNutritionData = createAsyncThunk(
  'nutrition/fetchDailyData',
  async (date: Date, { rejectWithValue }) => {
    try {
      const dateString = dayjs(date).format('YYYY-MM-DD');
      const startDate = dayjs(date).startOf('day').toISOString();
      const endDate = dayjs(date).endOf('day').toISOString();

      const response = await getDietRecords({
        startDate,
        endDate,
        limit: 100, // 获取当天所有记录
      });

      // 计算营养摘要
      let summary: NutritionSummary | null = null;
      if (response.records.length > 0) {
        summary = calculateNutritionSummary(response.records);
        summary.updatedAt = response.records[0].updatedAt;
      }

      return {
        dateKey: dateString,
        records: response.records,
        summary,
      };
    } catch (error: any) {
      return rejectWithValue(error.message || '获取营养数据失败');
    }
  }
);

// 异步操作：获取指定日期的健康数据
export const fetchDailyHealthData = createAsyncThunk(
  'nutrition/fetchHealthData',
  async (date: Date, { rejectWithValue }) => {
    try {
      const dateString = dayjs(date).format('YYYY-MM-DD');
      const healthData = await fetchHealthDataForDate(date);

      return {
        dateKey: dateString,
        healthData,
      };
    } catch (error: any) {
      return rejectWithValue(error.message || '获取健康数据失败');
    }
  }
);

// 异步操作：获取指定日期的基础代谢数据
export const fetchDailyBasalMetabolism = createAsyncThunk(
  'nutrition/fetchBasalMetabolism',
  async (date: Date, { rejectWithValue }) => {
    try {
      const dateString = dayjs(date).format('YYYY-MM-DD');
      const startDate = dayjs(date).startOf('day').toISOString();
      const endDate = dayjs(date).endOf('day').toISOString();

      const basalMetabolism = await fetchBasalEnergyBurned({
        startDate,
        endDate,
      });

      return {
        dateKey: dateString,
        basalMetabolism,
      };
    } catch (error: any) {
      return rejectWithValue(error.message || '获取基础代谢数据失败');
    }
  }
);

// 异步操作：获取指定日期的完整营养卡片数据（营养数据 + 健康数据）
export const fetchCompleteNutritionCardData = createAsyncThunk(
  'nutrition/fetchCompleteCardData',
  async (date: Date, { rejectWithValue, dispatch }) => {
    try {
      const dateString = dayjs(date).format('YYYY-MM-DD');

      // 并行获取营养数据和健康数据
      const [nutritionResult, healthResult, basalResult] = await Promise.allSettled([
        dispatch(fetchDailyNutritionData(date)).unwrap(),
        dispatch(fetchDailyHealthData(date)).unwrap(),
        dispatch(fetchDailyBasalMetabolism(date)).unwrap(),
      ]);

      return {
        dateKey: dateString,
        nutritionSuccess: nutritionResult.status === 'fulfilled',
        healthSuccess: healthResult.status === 'fulfilled',
        basalSuccess: basalResult.status === 'fulfilled',
      };
    } catch (error: any) {
      return rejectWithValue(error.message || '获取完整营养卡片数据失败');
    }
  }
);

const nutritionSlice = createSlice({
  name: 'nutrition',
  initialState,
  reducers: {
    // 清除错误
    clearError: (state) => {
      state.error = null;
    },

    // 清除指定日期的数据
    clearDataForDate: (state, action: PayloadAction<string>) => {
      const dateKey = action.payload;
      delete state.recordsByDate[dateKey];
      delete state.summaryByDate[dateKey];
      delete state.healthDataByDate[dateKey];
      delete state.basalMetabolismByDate[dateKey];
    },

    // 清除所有数据
    clearAllData: (state) => {
      state.recordsByDate = {};
      state.summaryByDate = {};
      state.healthDataByDate = {};
      state.basalMetabolismByDate = {};
      state.error = null;
      state.lastUpdateTime = null;
      state.pagination = initialState.pagination;
    },

    // 重置分页
    resetPagination: (state) => {
      state.pagination = initialState.pagination;
    },
  },
  extraReducers: (builder) => {
    // fetchNutritionRecords
    builder
      .addCase(fetchNutritionRecords.pending, (state) => {
        state.loading.records = true;
        state.error = null;
      })
      .addCase(fetchNutritionRecords.fulfilled, (state, action) => {
        state.loading.records = false;
        const { records, total, page, limit, append, dateKey } = action.payload;

        // 更新分页信息
        state.pagination = {
          page,
          limit,
          total,
          hasMore: records.length === limit,
        };

        if (dateKey) {
          // 按日期存储记录
          if (append && state.recordsByDate[dateKey]) {
            state.recordsByDate[dateKey] = [...state.recordsByDate[dateKey], ...records];
          } else {
            state.recordsByDate[dateKey] = records;
          }

          // 计算并存储营养摘要
          if (records.length > 0) {
            const summary = calculateNutritionSummary(records);
            summary.updatedAt = records[0].updatedAt;
            state.summaryByDate[dateKey] = summary;
          } else {
            delete state.summaryByDate[dateKey];
          }
        }

        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(fetchNutritionRecords.rejected, (state, action) => {
        state.loading.records = false;
        state.error = action.payload as string;
      });

    // deleteNutritionRecord
    builder
      .addCase(deleteNutritionRecord.pending, (state) => {
        state.loading.delete = true;
        state.error = null;
      })
      .addCase(deleteNutritionRecord.fulfilled, (state, action) => {
        state.loading.delete = false;
        const { recordId, dateKey } = action.payload;

        // 从记录中移除已删除的项
        if (state.recordsByDate[dateKey]) {
          state.recordsByDate[dateKey] = state.recordsByDate[dateKey].filter(
            record => record.id !== recordId
          );

          // 重新计算营养摘要
          const remainingRecords = state.recordsByDate[dateKey];
          if (remainingRecords.length > 0) {
            const summary = calculateNutritionSummary(remainingRecords);
            summary.updatedAt = remainingRecords[0].updatedAt;
            state.summaryByDate[dateKey] = summary;
          } else {
            delete state.summaryByDate[dateKey];
          }
        }

        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(deleteNutritionRecord.rejected, (state, action) => {
        state.loading.delete = false;
        state.error = action.payload as string;
      });

    // fetchDailyNutritionData
    builder
      .addCase(fetchDailyNutritionData.pending, (state) => {
        state.loading.records = true;
        state.error = null;
      })
      .addCase(fetchDailyNutritionData.fulfilled, (state, action) => {
        state.loading.records = false;
        const { dateKey, records, summary } = action.payload;

        // 存储记录和摘要
        state.recordsByDate[dateKey] = records;
        if (summary) {
          state.summaryByDate[dateKey] = summary;
        } else {
          delete state.summaryByDate[dateKey];
        }

        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(fetchDailyNutritionData.rejected, (state, action) => {
        state.loading.records = false;
        state.error = action.payload as string;
      });

    // fetchDailyHealthData
    builder
      .addCase(fetchDailyHealthData.pending, (state) => {
        state.loading.healthData = true;
        state.error = null;
      })
      .addCase(fetchDailyHealthData.fulfilled, (state, action) => {
        state.loading.healthData = false;
        const { dateKey, healthData } = action.payload;
        state.healthDataByDate[dateKey] = healthData;
        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(fetchDailyHealthData.rejected, (state, action) => {
        state.loading.healthData = false;
        state.error = action.payload as string;
      });

    // fetchDailyBasalMetabolism
    builder
      .addCase(fetchDailyBasalMetabolism.pending, (state) => {
        state.loading.basalMetabolism = true;
        state.error = null;
      })
      .addCase(fetchDailyBasalMetabolism.fulfilled, (state, action) => {
        state.loading.basalMetabolism = false;
        const { dateKey, basalMetabolism } = action.payload;
        state.basalMetabolismByDate[dateKey] = basalMetabolism;
        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(fetchDailyBasalMetabolism.rejected, (state, action) => {
        state.loading.basalMetabolism = false;
        state.error = action.payload as string;
      });

    // fetchCompleteNutritionCardData
    builder
      .addCase(fetchCompleteNutritionCardData.pending, (state) => {
        state.loading.records = true;
        state.loading.healthData = true;
        state.loading.basalMetabolism = true;
        state.error = null;
      })
      .addCase(fetchCompleteNutritionCardData.fulfilled, (state, action) => {
        state.loading.records = false;
        state.loading.healthData = false;
        state.loading.basalMetabolism = false;
        state.lastUpdateTime = new Date().toISOString();
      })
      .addCase(fetchCompleteNutritionCardData.rejected, (state, action) => {
        state.loading.records = false;
        state.loading.healthData = false;
        state.loading.basalMetabolism = false;
        state.error = action.payload as string;
      });
  },
});

// Action creators
export const {
  clearError,
  clearDataForDate,
  clearAllData,
  resetPagination,
} = nutritionSlice.actions;

// Selectors
export const selectNutritionRecordsByDate = (dateKey: string) => (state: { nutrition: NutritionState }) =>
  state.nutrition.recordsByDate[dateKey] || [];

export const selectNutritionSummaryByDate = (dateKey: string) => (state: { nutrition: NutritionState }) =>
  state.nutrition.summaryByDate[dateKey] || null;

export const selectHealthDataByDate = (dateKey: string) => (state: { nutrition: NutritionState }) =>
  state.nutrition.healthDataByDate[dateKey] || null;

export const selectBasalMetabolismByDate = (dateKey: string) => (state: { nutrition: NutritionState }) =>
  state.nutrition.basalMetabolismByDate[dateKey] || 0;

export const selectNutritionLoading = (state: { nutrition: NutritionState }) =>
  state.nutrition.loading;

export const selectNutritionError = (state: { nutrition: NutritionState }) =>
  state.nutrition.error;

export const selectNutritionPagination = (state: { nutrition: NutritionState }) =>
  state.nutrition.pagination;

// 复合选择器：获取指定日期的完整营养卡片数据
export const selectNutritionCardDataByDate = (dateKey: string) => (state: { nutrition: NutritionState }) => ({
  nutritionSummary: state.nutrition.summaryByDate[dateKey] || null,
  healthData: state.nutrition.healthDataByDate[dateKey] || null,
  basalMetabolism: state.nutrition.basalMetabolismByDate[dateKey] || 0,
  loading: state.nutrition.loading,
  error: state.nutrition.error,
});

export default nutritionSlice.reducer;