import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';

// 后端API基础URL
const API_BASE_URL = 'http://localhost:3005/api';

// 异步获取期货概览数据
export const fetchFuturesOverview = createAsyncThunk(
  'futures/fetchOverview',
  async () => {
    const response = await fetch(`${API_BASE_URL}/market/overview`);
    if (!response.ok) {
      throw new Error('获取市场概览失败');
    }
    const data = await response.json();
    return data.data;
  }
);

// 异步获取单个期货详情
export const fetchFutureDetail = createAsyncThunk(
  'futures/fetchDetail',
  async ({ code, name }) => {
    const response = await fetch(`${API_BASE_URL}/market/detail/${code}`);
    if (!response.ok) {
      throw new Error('获取品种详情失败');
    }
    const data = await response.json();
    return data.data;
  }
);

// 异步获取风险预警
export const fetchRiskAlerts = createAsyncThunk(
  'futures/fetchRiskAlerts',
  async () => {
    const response = await fetch(`${API_BASE_URL}/market/alerts`);
    if (!response.ok) {
      throw new Error('获取风险预警失败');
    }
    const data = await response.json();
    return data.data;
  }
);

// 异步获取AI市场分析
export const fetchAIMarketAnalysis = createAsyncThunk(
  'futures/fetchAIMarketAnalysis',
  async () => {
    // 由于后端没有专门的市场分析接口，我们使用模拟数据
    return {
      overallTrend: '震荡偏弱',
      keyFactors: ['原油价格波动', '宏观经济数据', '政策面变化'],
      recommendations: ['控制仓位', '关注原油走势', '做好止损'],
      confidence: 75
    };
  }
);

const futuresSlice = createSlice({
  name: 'futures',
  initialState: {
    overview: [],
    selectedFuture: null,
    riskAlerts: [],
    aiAnalysis: null,
    loading: false,
    error: null,
    watchlist: []
  },
  reducers: {
    selectFuture: (state, action) => {
      state.selectedFuture = action.payload;
    },
    clearSelectedFuture: (state) => {
      state.selectedFuture = null;
    },
    toggleWatchlist: (state, action) => {
      const code = action.payload;
      const index = state.watchlist.indexOf(code);
      if (index > -1) {
        state.watchlist.splice(index, 1);
      } else {
        state.watchlist.push(code);
      }
      // 更新overview中每个合约的自选状态
      state.overview = state.overview.map(item => ({
        ...item,
        isInWatchlist: state.watchlist.includes(item.code)
      }));
      // 更新selectedFuture的自选状态
      if (state.selectedFuture && state.selectedFuture.code === code) {
        state.selectedFuture.isInWatchlist = state.watchlist.includes(code);
      }
    }
  },
  extraReducers: (builder) => {
    builder
      // 处理fetchFuturesOverview
      .addCase(fetchFuturesOverview.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(fetchFuturesOverview.fulfilled, (state, action) => {
        state.loading = false;
        // 更新overview数据并添加自选状态
        state.overview = action.payload.map(item => ({
          ...item,
          isInWatchlist: state.watchlist.includes(item.code)
        }));
      })
      .addCase(fetchFuturesOverview.rejected, (state, action) => {
        state.loading = false;
        state.error = action.error.message;
      })
      
      // 处理fetchFutureDetail
      .addCase(fetchFutureDetail.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(fetchFutureDetail.fulfilled, (state, action) => {
        state.loading = false;
        // 更新selectedFuture数据并添加自选状态
        state.selectedFuture = {
          ...action.payload,
          isInWatchlist: state.watchlist.includes(action.payload.code)
        };
        console.log('fetchFutureDetail fulfilled with:', action.payload);
      })
      .addCase(fetchFutureDetail.rejected, (state, action) => {
        state.loading = false;
        state.error = action.error.message;
        console.log('fetchFutureDetail rejected with error:', action.error.message);
      })
      
      // 处理fetchRiskAlerts
      .addCase(fetchRiskAlerts.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(fetchRiskAlerts.fulfilled, (state, action) => {
        state.loading = false;
        state.riskAlerts = action.payload;
      })
      .addCase(fetchRiskAlerts.rejected, (state, action) => {
        state.loading = false;
        state.error = action.error.message;
      })
      
      // 处理fetchAIMarketAnalysis
      .addCase(fetchAIMarketAnalysis.pending, (state) => {
        state.loading = true;
        state.error = null;
      })
      .addCase(fetchAIMarketAnalysis.fulfilled, (state, action) => {
        state.loading = false;
        state.aiAnalysis = action.payload;
      })
      .addCase(fetchAIMarketAnalysis.rejected, (state, action) => {
        state.loading = false;
        state.error = action.error.message;
      });
  }
});

export const { selectFuture, clearSelectedFuture, toggleWatchlist } = futuresSlice.actions;
export default futuresSlice.reducer;