import { Variables } from './router_io.ts';
import type { QuizContent, QuizState, Answer } from '../client/mobile/components/Exam/types.ts';

interface ExamRoomData {
  roomId: string;
  userId?: string;
}

interface ExamQuestionData extends ExamRoomData {
  question: QuizContent;
}

interface ExamAnswerData extends ExamRoomData {
  questionId: string;
  answer: Answer;
}

interface ExamPriceData extends ExamRoomData {
  date: string;
  price: string;
}

export function setupExamEvents({ socket, apiClient }: Variables) {
  // 加入考试房间
  socket.on('exam:join', async (data: ExamRoomData) => {
    try {
      const { roomId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 加入房间
      socket.join(roomId);
      
      // 通知用户加入成功
      socket.emit('exam:joined', {
        roomId,
        message: `成功加入考试房间: ${roomId}`
      });

      // 通知房间其他用户有新成员加入
      socket.to(roomId).emit('exam:memberJoined', {
        roomId,
        userId: user.id,
        username: user.username
      });

      console.log(`用户 ${user.username} 加入考试房间 ${roomId}`);
    } catch (error) {
      console.error('加入考试房间失败:', error);
      socket.emit('error', '加入考试房间失败');
    }
  });

  // 离开考试房间
  socket.on('exam:leave', async (data: ExamRoomData) => {
    try {
      const { roomId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 离开房间
      socket.leave(roomId);
      
      // 通知用户离开成功
      socket.emit('exam:left', {
        roomId,
        message: `已离开考试房间: ${roomId}`
      });

      // 通知房间其他用户有成员离开
      socket.to(roomId).emit('exam:memberLeft', {
        roomId,
        userId: user.id,
        username: user.username
      });

      console.log(`用户 ${user.username} 离开考试房间 ${roomId}`);
    } catch (error) {
      console.error('离开考试房间失败:', error);
      socket.emit('error', '离开考试房间失败');
    }
  });

  // 发送考试房间消息
  socket.on('exam:message', async (data: {
    roomId: string;
    message: {
      type: string;
      content: any;
    }
  }) => {
    try {
      const { roomId, message } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 广播消息到房间
      socket.to(roomId).emit('exam:message', {
        roomId,
        message: {
          ...message,
          from: user.id,
          username: user.username,
          timestamp: new Date().toISOString()
        }
      });

      console.log(`用户 ${user.username} 在房间 ${roomId} 发送消息: ${message.type}`);
    } catch (error) {
      console.error('发送考试消息失败:', error);
      socket.emit('error', '发送考试消息失败');
    }
  });

  // 推送题目
  socket.on('exam:question', async (data: ExamQuestionData) => {
    try {
      const { roomId, question } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 存储当前问题状态到Redis
      const questionKey = `exam:${roomId}:current_question`;
      await apiClient.redis.hset(questionKey, 'date', String(question.date));
      await apiClient.redis.hset(questionKey, 'price', String(question.price));
      await apiClient.redis.hset(questionKey, 'updated_at', new Date().toISOString());
      // TODO: 需要Redis服务端配置自动过期或通过其他方式实现TTL

      // 广播题目到房间
      // socket.to(roomId).emit('exam:question', {
      //   roomId,
      //   question: {
      //     ...question,
      //     timestamp: new Date().toISOString()
      //   }
      // });
      // 存储价格到Redis
      const priceKey = `exam:${roomId}:prices`;
      await apiClient.redis.hset(priceKey, question.date, String(question.price));

      // console.log(`用户 ${user.username} 存储房间 ${roomId} 的价格历史: ${date} - ${price}`);
      const quizState:QuizState = {
        // id: `question-${Date.now()}`,
        id: question.date, 
        date: question.date, 
        price: question.price
      }
      socket.to(roomId).emit('exam:question', quizState);

      console.log(`用户 ${user.username} 在房间 ${roomId} 推送题目`);
    } catch (error) {
      console.error('推送题目失败:', error);
      socket.emit('error', '推送题目失败');
    }
  });

  // 存储答案
  socket.on('exam:storeAnswer', async (data: ExamAnswerData, callback: (success: boolean) => void) => {
    try {
      const { roomId, questionId, answer } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        callback(false);
        return;
      }

      // 存储答案到Redis
      // 新key格式: exam:answers:{roomId}:{userId}:{questionId}
      // 优点:
      // 1. 更清晰的命名空间划分(exam:answers开头)
      // 2. 支持两种查询模式:
      //    - 按用户查询: exam:answers:{roomId}:{userId}:*
      //    - 按题目查询: exam:answers:{roomId}:*:{questionId}
      // 3. 每个用户答案独立存储，避免大hash性能问题
      const answerKey = `exam:answers:${roomId}:${user.id}:${questionId}`;
      await apiClient.redis.hset(answerKey, 'data', JSON.stringify({
        username: user.username,
        date: answer.date,
        price: answer.price,
        holdingStock: answer.holdingStock,
        holdingCash: answer.holdingCash,
        profitAmount: answer.profitAmount,
        profitPercent: answer.profitPercent,
        totalProfitAmount: answer.totalProfitAmount,
        totalProfitPercent: answer.totalProfitPercent
      }));

      // 广播答案更新到房间
      socket.to(roomId).emit('exam:answerUpdated', {
        roomId,
        questionId,
        userId: user.id,
        username: user.username
      });

      // // 通知管理员有新答案提交
      // socket.to(`admin-${roomId}`).emit('exam:newAnswer', {
      //   roomId,
      //   questionId,
      //   userId: user.id,
      //   username: user.username,
      //   timestamp: new Date().toISOString()
      // });

      console.log(`用户 ${user.username} 在房间 ${roomId} 存储答案`);
      callback(true);
    } catch (error) {
      console.error('存储答案失败:', error);
      socket.emit('error', '存储答案失败');
      callback(false);
    }
  });

  // 获取答案
  socket.on('exam:getAnswers', async (data: {
    roomId: string;
    questionId: string;
  }, callback: (answers: Answer[]) => void) => {
    try {
      const { roomId, questionId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 从Redis获取答案
      // 支持两种查询模式:
      // 1. 查询特定问题的所有答案: exam:answers:{roomId}:{questionId}:*
      // 2. 查询房间的所有答案: exam:answers:{roomId}:*
      const pattern = questionId
        ? `exam:answers:${roomId}:*:${questionId}`
        : `exam:answers:${roomId}:*`;
      
      const keys = await apiClient.redis.keys(pattern);
      const formattedAnswers:Answer[] = [];

      // 并行获取所有答案
      await Promise.all(keys.map(async (key) => {
        try {
          const answerStr = await apiClient.redis.hget(key, 'data');
          if (answerStr) {
            const answer = JSON.parse(answerStr);
            // 从key中提取userId (第四部分)
            const userId = key.split(':')[3];
            formattedAnswers.push({
              ...answer,
              userId
            });
          }
        } catch (error) {
          console.log('获取答案失败:', error);
        }
      }));

      callback(formattedAnswers);
    } catch (error) {
      console.error('获取答案失败:', error);
      socket.emit('error', '获取答案失败');
      callback([]);
    }
  });

  // 清理房间数据
  socket.on('exam:cleanup', async (data: {
    roomId: string;
    questionId?: string;
  }) => {
    try {
      const { roomId, questionId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      if (questionId) {
        // 清理特定问题的数据
        const answerKey = `exam:${roomId}:${questionId}:answers`;
        const keys = await apiClient.redis.keys(answerKey);
        if (keys.length > 0) {
          await Promise.all(keys.map((key) => apiClient.redis.del(key)))
        }
      } else {
        // 清理整个房间的数据
        const keys = await apiClient.redis.keys(`exam:${roomId}:*`);
        if (keys.length > 0) {
          await Promise.all(keys.map((key) => apiClient.redis.del(key)))
        }
      }

      socket.emit('exam:cleaned', {
        roomId,
        message: questionId 
          ? `已清理房间 ${roomId} 的问题 ${questionId} 数据`
          : `已清理房间 ${roomId} 的所有数据`
      });

      console.log(`用户 ${user.username} 清理房间 ${roomId} 数据`);
    } catch (error) {
      console.error('清理房间数据失败:', error);
      socket.emit('error', '清理房间数据失败');
    }
  });

  // 存储价格历史
  socket.on('exam:storePrice', async (data: ExamPriceData) => {
    try {
      const { roomId, date, price } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 存储价格到Redis
      const priceKey = `exam:${roomId}:prices`;
      await apiClient.redis.hset(priceKey, date, price);

      console.log(`用户 ${user.username} 存储房间 ${roomId} 的价格历史: ${date} - ${price}`);
    } catch (error) {
      console.error('存储价格历史失败:', error);
      socket.emit('error', '存储价格历史失败');
    }
  });

  // 获取历史价格
  socket.on('exam:getPrice', async (data: {
    roomId: string;
    date: string;
  }, callback: (price: string) => void) => {
    try {
      const { roomId, date } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 从Redis获取价格
      const priceKey = `exam:${roomId}:prices`;
      const price = await apiClient.redis.hget(priceKey, date);
      callback(price || '0');
    } catch (error) {
      console.error('获取历史价格失败:', error);
      socket.emit('error', '获取历史价格失败');
      callback('0');
    }
  });

  // 获取所有价格历史
  socket.on('exam:getPrices', async (data: {
    roomId: string;
  }, callback: (prices: Record<string, number>) => void) => {
    try {
      const { roomId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        return;
      }

      // 从Redis获取所有价格
      const priceKey = `exam:${roomId}:prices`;
      const priceMap = await apiClient.redis.hgetall(priceKey);
      const entries = Object.entries(priceMap);
      const convertedEntries = entries.map(([date, price]) => [date, Number(price)]);
      const convertedMap = Object.fromEntries(convertedEntries);
      
      callback(convertedMap);
    } catch (error) {
      console.error('获取所有价格历史失败:', error);
      socket.emit('error', '获取所有价格历史失败');
      callback({});
    }
  });

  // 获取用户答案
  socket.on('exam:getUserAnswers', async (data: {
    roomId: string;
    userId: string;
  }, callback: (answers: Array<Answer>) => void) => {
    try {
      const { roomId, userId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        callback([]);
        return;
      }

      // 从Redis获取该用户的所有答案
      const pattern = `exam:answers:${roomId}:${userId}:*`;
      const keys = await apiClient.redis.keys(pattern);
      const userAnswers: Array<Answer> = [];

      // 并行获取所有答案
      await Promise.all(keys.map(async (key: string) => {
        try {
          const answerStr = await apiClient.redis.hget(key, 'data');
          if (answerStr) {
            const answer = JSON.parse(answerStr) as Answer;
            userAnswers.push(answer)
          }
        } catch (error) {
          console.log('获取用户答案失败:', error);
        }
      }));

      callback(userAnswers);
    } catch (error) {
      console.error('获取用户答案失败:', error);
      socket.emit('error', '获取用户答案失败');
      callback([]);
    }
  });

  // 获取当前问题
  socket.on('exam:currentQuestion', async (data: ExamRoomData, callback: (question: QuizState | null) => void) => {
    try {
      const { roomId } = data;
      const user = socket.user;
      
      if (!user) {
        socket.emit('error', '未授权访问');
        callback(null);
        return;
      }

      // 从Redis获取当前问题数据
      const questionKey = `exam:${roomId}:current_question`;
      const date = await apiClient.redis.hget(questionKey, 'date');
      const price = await apiClient.redis.hget(questionKey, 'price');

      if (!date || !price) {
        callback(null);
        return;
      }

      const quizState: QuizState = {
        id: date,
        date,
        price
      };

      callback(quizState);
      console.log(`用户 ${user.username} 获取房间 ${roomId} 的当前问题`);
    } catch (error) {
      console.error('获取当前问题失败:', error);
      socket.emit('error', '获取当前问题失败');
      callback(null);
    }
  });

}