import { useEffect, useState, useCallback } from 'react';
import { APIClient } from '@d8d-appcontainer/api';
import { useQuery, useQueryClient } from '@tanstack/react-query';
import type {
  QuizContent,
  QuizState,
  ExamSocketMessage,
  ExamSocketRoomMessage,
  Answer
} from '../types.ts';
import { useAuth } from "../../../hooks.tsx";

interface LoaderData {
  token: string;
  serverUrl: string;
}

// 工具函数：统一错误处理
const handleAsyncOperation = async <T>(
  operation: () => Promise<T>,
  errorMessage: string
): Promise<T> => {
  try {
    return await operation();
  } catch (error) {
    console.error(`${errorMessage}:`, error);
    throw error;
  }
};

// 计算收益的辅助函数
interface ProfitResult {
  profitAmount: number;  // 金额收益
  profitPercent: number; // 百分比收益
}

function calculateProfit(currentPrice: number, previousPrice: number, holdingStock: string): ProfitResult {
  if (holdingStock === '1') {
    const profitAmount = currentPrice - previousPrice;  // 金额收益
    const profitPercent = ((currentPrice - previousPrice) / previousPrice) * 100;  // 百分比收益
    return {
      profitAmount,
      profitPercent
    };
  }
  return {
    profitAmount: 0,
    profitPercent: 0
  };
}

// 使用react-query管理socket客户端
export function useSocketClient(roomId: string | null) {
  const { token } = useAuth();
  const serverUrl = '/';

  const { data: client } = useQuery({
    queryKey: ['socket-client'],
    queryFn: async () => {
      if (!token || !serverUrl) return null;

      const apiClient = new APIClient({
        scope: 'user',
        config: {
          serverUrl,
          type: 'socket',
          token,
        }
      });

      await apiClient.connect();
      return apiClient;
    },
    enabled: !!token && !!serverUrl && !!roomId,
    staleTime: Infinity,
    retry: 3,
    gcTime: 0
  });

  const joinRoom = useCallback(async (roomId: string) => {
    if (client) {
      await client.socket.joinRoom(roomId);
    }
  }, [client]);

  const leaveRoom = useCallback(async (roomId: string) => {
    if (client) {
      await client.socket.leaveRoom(roomId);
    }
  }, [client]);

  const sendRoomMessage = useCallback(async (roomId: string, message: ExamSocketMessage) => {
    if (client) {
      await client.socket.sendRoomMessage(roomId, message as any);
    }
  }, [client]);

  const onRoomMessage = useCallback((callback: (data: ExamSocketRoomMessage) => void) => {
    if (client) {
      client.socket.onRoomMessage(callback);
    }
  }, [client]);

  const getAnswers = useCallback(async (roomId: string, questionId: string): Promise<Answer[]> => {
    if (!client) return [];

    return handleAsyncOperation(async () => {
      const answersData = await client.redis.hgetall(`quiz:${roomId}:answers:${questionId}`);
      if (!answersData) return [];
      
      return Object.entries(answersData).map(([userId, data]) => ({
        ...(JSON.parse(data) as QuizContent),
        userId,
      })) as Answer[];
    }, '获取答案失败');
  }, [client]);

  const storeAnswer = useCallback(async (roomId: string, questionId: string, userId: string, answer: QuizContent) => {
    if (!client) return;

    // 获取历史价格数据
    const pricesData = await client.redis.hgetall(`quiz:${roomId}:prices`);
    if (!pricesData) {
      // 如果没有历史数据，存储初始答案
      const initialAnswer: Answer = {
        ...answer,
        userId,
        profitAmount: 0,
        profitPercent: 0,
        totalProfitAmount: 0,
        totalProfitPercent: 0
      };
      
      await client.redis.hset(
        `quiz:${roomId}:answers:${questionId}`,
        userId,
        JSON.stringify(initialAnswer)
      );
      return;
    }

    // 获取该用户的所有历史答案
    const dates = Object.keys(pricesData).sort();
    const allAnswers = await Promise.all(
      dates.map(date => getAnswers(roomId, date))
    );

    // 过滤出当前用户的答案并添加价格信息
    const userAnswers = allAnswers
      .flat()
      .filter((a: Answer) => a.userId === userId)
      .map((a: Answer) => {
        if (!a.date) return a;
        const priceData = JSON.parse(pricesData[a.date] || '{"price":"0"}');
        return {
          ...a,
          price: priceData.price
        };
      })
      .sort((a: Answer, b: Answer) => new Date(a.date || '').getTime() - new Date(b.date || '').getTime());

    // 计算收益
    let totalProfitAmount = 0;
    let totalProfitPercent = 0;
    
    if (userAnswers.length > 0) {
      const prevAnswer = userAnswers[userAnswers.length - 1];
      const { profitAmount, profitPercent } = calculateProfit(
        parseFloat(String(answer.price)),
        parseFloat(String(prevAnswer.price)),
        prevAnswer.holdingStock as string
      );
      
      totalProfitAmount = (prevAnswer.totalProfitAmount || 0) + profitAmount;
      totalProfitPercent = (prevAnswer.totalProfitPercent || 0) + profitPercent;
    }

    // 存储带有收益信息的答案
    const answerWithProfit: Answer = {
      ...answer,
      userId,
      profitAmount: userAnswers.length > 0 ? totalProfitAmount - (userAnswers[userAnswers.length - 1].totalProfitAmount || 0) : 0,
      profitPercent: userAnswers.length > 0 ? totalProfitPercent - (userAnswers[userAnswers.length - 1].totalProfitPercent || 0) : 0,
      totalProfitAmount,
      totalProfitPercent
    };

    if (client?.redis) {
      await client.redis.hset(
        `quiz:${roomId}:answers:${questionId}`,
        userId,
        JSON.stringify(answerWithProfit)
      );
    }
  }, [client, getAnswers]);

  const cleanupRoom = useCallback(async (roomId: string, questionId?: string) => {
    if (!client) return;

    await handleAsyncOperation(async () => {
      if (questionId) {
        await client.redis.del(`quiz:${roomId}:answers:${questionId}`);
      } else {
        await Promise.all([
          client.redis.delByPattern(`quiz:${roomId}:answers:*`),
          client.redis.del(`quiz:${roomId}:prices`)
        ]);
      }
    }, '清理房间数据失败');
  }, [client]);

  const sendNextQuestion = useCallback(async (roomId: string, state: QuizState) => {
    if (!client) return;

    return handleAsyncOperation(async () => {
      const message = {
        type: 'question',
        content: {
          date: state.date,
          price: state.price
        }
      };

      // 存储当前问题状态
      await storeAnswer(roomId, 'current_state', 'system', {
        date: state.date,
        price: state.price
      });

      // 存储价格历史记录
      await client.redis.hset(
        `quiz:${roomId}:prices`,
        state.date,
        JSON.stringify({ price: state.price })
      );

      await sendRoomMessage(roomId, message);
    }, '发送题目失败');
  }, [client, sendRoomMessage, storeAnswer]);

  const getCurrentQuestion = useCallback(async (roomId: string): Promise<QuizState | null> => {
    if (!client) return null;

    return handleAsyncOperation(async () => {
      const answers = await getAnswers(roomId, 'current_state');
      const currentState = answers[0];
      if (currentState) {
        return {
          date: currentState.date || '',
          price: currentState.price || '0'
        };
      }
      return null;
    }, '获取当前题目状态失败');
  }, [client, getAnswers]);

  // 添加获取历史价格的函数
  const getPriceHistory = useCallback(async (roomId: string, date: string): Promise<string> => {
    if (!client) return '0';

    return handleAsyncOperation(async () => {
      const priceData = await client.redis.hget(`quiz:${roomId}:prices`, date);
      if (!priceData) return '0';
      
      const { price } = JSON.parse(priceData);
      return String(price);
    }, '获取历史价格失败');
  }, [client]);

  return {
    client,
    joinRoom,
    leaveRoom,
    sendRoomMessage,
    onRoomMessage,
    storeAnswer,
    getAnswers,
    cleanupRoom,
    sendNextQuestion,
    getCurrentQuestion,
    getPriceHistory
  };
}

// Socket Room Hook
export function useSocketRoom(roomId: string | null) {
  const socketClient = useSocketClient(roomId);

  const { data: roomConnection } = useQuery({
    queryKey: ['socket-room', roomId],
    queryFn: async () => {
      if (!roomId || !socketClient.client) return null;
      await socketClient.joinRoom(roomId);
      console.log(`Connected to room: ${roomId}`);
      return { roomId, connected: true };
    },
    enabled: !!roomId && !!socketClient.client,
    staleTime: Infinity,
    gcTime: Infinity,
    retry: false
  });

  return {
    connected: roomConnection?.connected || false,
    socketClient
  };
}

// 使用react-query管理当前题目状态
export function useCurrentQuestion(roomId: string | null) {
  const socketClient = useSocketClient(roomId);
  
  const { data: currentQuestion, refetch } = useQuery({
    queryKey: ['current-question', roomId],
    queryFn: async () => {
      if (!roomId || !socketClient) return null;
      return socketClient.getCurrentQuestion(roomId);
    },
    enabled: !!roomId && !!socketClient,
    staleTime: 0
  });

  return {
    currentQuestion,
    refetchQuestion: refetch
  };
}

// 使用react-query管理房间消息
export function useRoomMessages(roomId: string | null) {
  const socketClient = useSocketClient(roomId);
  const queryClient = useQueryClient();
  const [lastMessage, setLastMessage] = useState<ExamSocketRoomMessage | null>(null);

  useEffect(() => {
    if (!roomId || !socketClient) return;

    const handleMessage = (data: ExamSocketRoomMessage) => {
      setLastMessage(data);
      const { type, content } = data.message;

      // 处理不同类型的消息
      switch (type) {
        case 'question':
          queryClient.invalidateQueries({ queryKey: ['current-question', roomId] });
          break;
        case 'answer':
          const { date } = content;
          queryClient.invalidateQueries({ queryKey: ['answers', roomId, date] });
          break;
        case 'settlement':
        case 'submit':
          // 刷新所有用户的答题历史
          queryClient.invalidateQueries({ 
            queryKey: ['user-answers'],
            predicate: (query) => query.queryKey[1] === roomId 
          });
          // 刷新当前答案缓存
          queryClient.invalidateQueries({ 
            queryKey: ['answers', roomId] 
          });
          break;
        case 'restart':
          // 重置所有相关查询
          queryClient.invalidateQueries({ queryKey: ['current-question', roomId] });
          queryClient.invalidateQueries({ queryKey: ['answers', roomId] });
          queryClient.invalidateQueries({ 
            queryKey: ['user-answers'],
            predicate: (query) => query.queryKey[1] === roomId 
          });
          queryClient.invalidateQueries({ queryKey: ['training-results', roomId] });
          break;
      }
    };

    socketClient.onRoomMessage(handleMessage);
  }, [roomId, socketClient, queryClient]);

  return lastMessage;
}

// 使用react-query管理答案缓存
export function useAnswerCache(roomId: string | null, date: string | null) {
  const socketClient = useSocketClient(roomId);

  const { data: answers, refetch: refetchAnswers } = useQuery({
    queryKey: ['answers', roomId, date],
    queryFn: async () => {
      if (!roomId || !date || !socketClient) return [];
      const answers = await socketClient.getAnswers(roomId, date);
      const priceData = await socketClient.client?.redis.hget(`quiz:${roomId}:prices`, date);
      if (!priceData) return answers;

      const { price } = JSON.parse(priceData);
      return answers.map((answer: Answer) => ({
        ...answer,
        price
      }));
    },
    enabled: !!roomId && !!date && !!socketClient,
    staleTime: 0
  });

  return {
    answers: answers || [],
    refetchAnswers
  };
}

// 使用react-query管理用户答案历史
export function useUserAnswerHistory(roomId: string | null, userId: string | null) {
  const socketClient = useSocketClient(roomId);

  const { data: userAnswers, refetch: refetchUserAnswers } = useQuery({
    queryKey: ['user-answers', roomId, userId],
    queryFn: async () => {
      if (!roomId || !userId || !socketClient) return [];
      
      // 先获取所有价格记录
      const pricesData = await socketClient.client?.redis.hgetall(`quiz:${roomId}:prices`);
      if (!pricesData) return [];
      
      // 获取所有日期的答案
      const allAnswers = await Promise.all(
        Object.keys(pricesData).map(date => socketClient.getAnswers(roomId, date))
      );
      
      // 过滤出当前用户的答案并添加价格信息
      const userAnswersWithPrice = allAnswers
        .flat()
        .filter((answer: Answer) => answer.userId === userId)
        .map((answer: Answer) => {
          if (!answer.date) return answer;
          const priceData = JSON.parse(pricesData[answer.date] || '{"price":"0"}');
          return {
            ...answer,
            price: priceData.price
          };
        })
        .sort((a: Answer, b: Answer) => new Date(a.date || '').getTime() - new Date(b.date || '').getTime()); // 按日期排序

      // 计算每条记录的收益
      let totalProfitAmount = 0;
      let totalProfitPercent = 0;
      const answersWithProfit = userAnswersWithPrice.map((answer: Answer, index: number) => {
        if (index === 0) {
          return { 
            ...answer, 
            profitAmount: 0,
            profitPercent: 0,
            totalProfitAmount: 0,
            totalProfitPercent: 0
          };
        }

        const prevAnswer = userAnswersWithPrice[index - 1];
        const { profitAmount, profitPercent } = calculateProfit(
          parseFloat(answer.price as string),
          parseFloat(prevAnswer.price as string),
          prevAnswer.holdingStock as string
        );
        
        totalProfitAmount += profitAmount;
        totalProfitPercent += profitPercent;

        return {
          ...answer,
          profitAmount,
          profitPercent,
          totalProfitAmount,
          totalProfitPercent
        };
      });

      return answersWithProfit;
    },
    enabled: !!roomId && !!userId && !!socketClient,
    staleTime: 0
  });

  return {
    userAnswers: userAnswers || [],
    refetchUserAnswers
  };
}

// 使用react-query管理答案提交
export function useAnswerSubmission(roomId: string | null) {
  const { client, sendRoomMessage, storeAnswer } = useSocketClient(roomId);
  const queryClient = useQueryClient();

  const submitAnswer = useCallback(async (date: string, nickname: string, answer: any) => {
    if (!client) return;

    return handleAsyncOperation(async () => {
      await storeAnswer(roomId, date, nickname, answer);
      await sendRoomMessage(roomId, {
        type: 'answer',
        content: answer
      });
      queryClient.invalidateQueries({ queryKey: ['answers', roomId, date] });
      queryClient.invalidateQueries({ queryKey: ['user-answers', roomId, nickname] });
    }, '提交答案失败');
  }, [roomId, client, storeAnswer, sendRoomMessage, queryClient]);

  return { submitAnswer };
}

// 使用react-query管理答案提交到后端
export function useAnswerManagement(roomId: string | null) {
  const socketClient = useSocketClient(roomId);
  const queryClient = useQueryClient();

  // 添加自动结算函数
  const autoSettlement = useCallback(async (date: string) => {
    if (!socketClient?.client) return;

    return handleAsyncOperation(async () => {
      // 获取当前所有答案
      const answers = await socketClient.getAnswers(roomId, date);
      const currentPrice = answers[0]?.price;  // 使用当前价格作为结算价格
      
      if (!currentPrice) return;

      // 找出所有持股的用户
      const holdingStockUsers = answers.filter((answer: Answer) => answer.holdingStock === '1');
      
      // 为每个持股用户创建一个结算记录
      await Promise.all(holdingStockUsers.map(async (answer: Answer) => {
        const settlementAnswer = {
          ...answer,
          date,
          holdingStock: '0',  // 清仓
          holdingCash: '1',   // 全部持币
          price: currentPrice,
          userId: answer.userId,
        };
        
        // 存储结算记录
        await socketClient.storeAnswer(roomId, date, answer.userId, settlementAnswer);
      }));

      // 发送结算消息通知客户端刷新
      await socketClient.sendRoomMessage(roomId, {
        type: 'settlement',
        content: {
          date,
          price: currentPrice
        }
      });

      // 刷新当前页面的数据
      queryClient.invalidateQueries({ queryKey: ['answers', roomId, date] });
    }, '自动结算失败');
  }, [roomId, socketClient, queryClient]);

  const submitAnswersToBackend = useCallback(async (date: string) => {
    if (!socketClient) return;

    return handleAsyncOperation(async () => {
      const allAnswers = await socketClient.getAnswers(roomId, date);
      
      // 检查是否还有持股的用户
      const hasHoldingStock = allAnswers.some((answer: Answer) => answer.holdingStock === '1');
      if (hasHoldingStock) {
        throw new Error('还有用户持股中，请先进行结算');
      }

      const priceData = await socketClient.client?.redis.hget(`quiz:${roomId}:prices`, date);
      const { price } = priceData ? JSON.parse(priceData) : { price: '0' };
      
      // 获取前一天的价格
      const allPrices = await socketClient.client?.redis.hgetall(`quiz:${roomId}:prices`);
      const dates = Object.keys(allPrices || {}).sort();
      const currentDateIndex = dates.indexOf(date);
      const prevPrice = currentDateIndex > 0 
        ? JSON.parse(allPrices![dates[currentDateIndex - 1]]).price 
        : price;

      // 计算每个用户的收益
      const answersWithProfit = allAnswers.map((answer: Answer) => ({
        ...answer,
        price,
        profit: calculateProfit(parseFloat(price), parseFloat(prevPrice), answer.holdingStock || '0')
      }));
      
      const response = await fetch('/api/v1/classroom-answers', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          classroom_no: roomId,
          date,
          answers: answersWithProfit
        })
      });

      const data = await response.json();
      if (!data.success) {
        throw new Error(data.message || '提交失败');
      }

      // 发送收卷消息通知客户端
      await socketClient.sendRoomMessage(roomId, {
        type: 'submit',
        content: {
          date,
          price
        }
      });

      await socketClient.cleanupRoom(roomId, date);
      return data;
    }, '提交答案到后端失败');
  }, [roomId, socketClient]);

  const { data: results, refetch: refetchResults } = useQuery({
    queryKey: ['training-results', roomId],
    queryFn: async () => {
      if (!roomId) return null;
      const response = await fetch(`/api/v1/classroom-results?classroom_no=${roomId}`);
      const data = await response.json();
      if (!data.success) {
        throw new Error(data.message || '获取结果失败');
      }
      return data.data;
    },
    enabled: false
  });

  const restartTraining = useCallback(async () => {
    if (!socketClient) return;

    return handleAsyncOperation(async () => {
      await socketClient.cleanupRoom(roomId);
      // 发送重开消息
      await socketClient.sendRoomMessage(roomId, {
        type: 'restart',
        content: {}
      });
      queryClient.invalidateQueries({ queryKey: ['current-question', roomId] });
      queryClient.invalidateQueries({ queryKey: ['answers', roomId] });
      queryClient.invalidateQueries({ queryKey: ['training-results', roomId] });
    }, '重启训练失败');
  }, [roomId, socketClient, queryClient]);

  return {
    autoSettlement,  // 暴露结算函数
    submitAnswersToBackend,
    results,
    refetchResults,
    restartTraining
  };
}

// 使用react-query管理题目发送 - 直接使用 useSocketClient 中的 sendNextQuestion
export function useQuestionManagement(roomId: string | null) {
  const socketClient = useSocketClient(roomId);
  const queryClient = useQueryClient();

  const sendNextQuestion = useCallback(async (state: QuizState) => {
    if (!socketClient) return;

    return handleAsyncOperation(async () => {
      await socketClient.sendNextQuestion(roomId, state);
      queryClient.invalidateQueries({ queryKey: ['current-question', roomId] });
    }, '发送题目失败');
  }, [roomId, socketClient, queryClient]);

  return {
    sendNextQuestion
  };
}