const { Room, Apartment, Rental } = require('../models');
const { Op } = require('sequelize');

// 格式化时间（考虑时区，转换为北京时间）
const formatDate = (date) => {
  if (!date) return null;
  // 创建一个新的Date对象，加上8小时的时区偏移
  const beijingDate = new Date(date.getTime() + 8 * 60 * 60 * 1000);
  return beijingDate.toISOString().split('T')[0];
};

// 格式化房间数据
const formatRoomData = (room) => {
  const formattedRoom = {
    ...room.toJSON(),
    createTime: formatDate(room.createTime)
  };
  
  // 格式化关联数据
  if (formattedRoom.Apartment) {
    formattedRoom.Apartment = {
      ...formattedRoom.Apartment,
      createTime: formatDate(formattedRoom.Apartment.createTime)
    };
  }
  
  // 格式化租房信息
  if (formattedRoom.Rentals && formattedRoom.Rentals.length > 0) {
    formattedRoom.Rentals = formattedRoom.Rentals.map(rental => {
      const formattedRental = {
        ...rental,
        startDate: formatDate(rental.startDate),
        endDate: formatDate(rental.endDate),
        createTime: formatDate(rental.createTime)
      };
      
      // 格式化租客信息
      if (formattedRental.Tenant) {
        formattedRental.Tenant = {
          ...formattedRental.Tenant,
          createTime: formatDate(formattedRental.Tenant.createTime)
        };
      }
      
      return formattedRental;
    });
  }
  
  return formattedRoom;
};

// 检查并更新租房状态
const checkAndUpdateRentalStatus = async () => {
  try {
    // 获取当前日期
    const currentDate = new Date();
    // 计算10天后的日期
    const tenDaysLater = new Date();
    tenDaysLater.setDate(currentDate.getDate() + 10);
    
    // 查找所有活跃的租房记录
    const rentals = await Rental.findAll({
      where: { status: 'active' }
    });
    
    // 检查每个租房记录的状态
    for (const rental of rentals) {
      const endDate = new Date(rental.endDate);
      
      // 检查是否已到期
      if (endDate < currentDate) {
        // 更新租房状态为已到期
        await rental.update({ status: 'expired' });
        // 更新房间状态为空房
        const room = await Room.findByPk(rental.roomId);
        if (room) {
          await room.update({ status: 'empty' });
        }
      } else if (endDate <= tenDaysLater) {
        // 更新房间状态为即将到期
        const room = await Room.findByPk(rental.roomId);
        if (room && room.status === 'rented') {
          await room.update({ status: 'soon_expire' });
        }
      }
    }
    
    console.log('租房状态检查和更新完成');
  } catch (error) {
    console.error('检查和更新租房状态时出错:', error);
  }
};

// 获取所有房间（支持搜索和分页）
const getAllRooms = async (req, res) => {
  try {
    // 先检查并更新租房状态
    await checkAndUpdateRentalStatus();
    
    const { apartmentId, roomNumber, status, page = 1, pageSize = 10 } = req.query;
    
    // 构建查询条件
    const where = {};
    if (apartmentId) {
      where.apartmentId = apartmentId;
    }
    if (roomNumber) {
      where.roomNumber = {
        [Op.like]: `%${roomNumber}%`
      };
    }
    if (status) {
      where.status = status;
    }
    
    // 计算偏移量
    const offset = (page - 1) * pageSize;
    
    // 查询房间数据
    const { count, rows } = await Room.findAndCountAll({
      where,
      include: [
        Apartment
      ],
      limit: parseInt(pageSize),
      offset: parseInt(offset)
    });
    
    // 为每个房间获取非过期的租房信息
    const formattedRooms = await Promise.all(rows.map(async (room) => {
      const formattedRoom = formatRoomData(room);
      
      // 查询非过期的租房信息
      const rentals = await Rental.findAll({
        where: {
          roomId: room.id,
          status: { [Op.ne]: 'expired' }
        },
        include: ['Tenant']
      });
      
      // 格式化租房信息
      if (rentals.length > 0) {
        formattedRoom.Rentals = rentals.map(rental => {
          const formattedRental = {
            ...rental.toJSON(),
            startDate: formatDate(rental.startDate),
            endDate: formatDate(rental.endDate),
            createTime: formatDate(rental.createTime)
          };
          
          // 格式化租客信息
          if (formattedRental.Tenant) {
            formattedRental.Tenant = {
              ...formattedRental.Tenant,
              createTime: formatDate(formattedRental.Tenant.createTime)
            };
          }
          
          return formattedRental;
        });
      } else {
        formattedRoom.Rentals = [];
      }
      
      return formattedRoom;
    }));
    

    
    // 返回结果
    res.status(200).json({
      data: formattedRooms,
      total: count,
      page: parseInt(page),
      pageSize: parseInt(pageSize)
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 获取单个房间
const getRoomById = async (req, res) => {
  try {
    // 先检查并更新租房状态
    await checkAndUpdateRentalStatus();
    
    const { id } = req.params;
    const room = await Room.findByPk(id, {
      include: [Apartment]
    });
    if (!room) {
      return res.status(404).json({ error: '房间不存在' });
    }
    
    // 格式化房间数据
    const formattedRoom = formatRoomData(room);
    
    // 查询非过期的租房信息
    const rentals = await Rental.findAll({
      where: {
        roomId: room.id,
        status: { [Op.ne]: 'expired' }
      },
      include: ['Tenant']
    });
    
    // 格式化租房信息
    if (rentals.length > 0) {
      formattedRoom.Rentals = rentals.map(rental => {
        const formattedRental = {
          ...rental.toJSON(),
          startDate: formatDate(rental.startDate),
          endDate: formatDate(rental.endDate),
          createTime: formatDate(rental.createTime)
        };
        
        // 格式化租客信息
        if (formattedRental.Tenant) {
          formattedRental.Tenant = {
            ...formattedRental.Tenant,
            createTime: formatDate(formattedRental.Tenant.createTime)
          };
        }
        
        return formattedRental;
      });
    } else {
      formattedRoom.Rentals = [];
    }
    res.status(200).json(formattedRoom);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 创建房间
const createRoom = async (req, res) => {
  try {
    const { apartmentId, roomNumber, area, price, status } = req.body;
    const room = await Room.create({ apartmentId, roomNumber, area, price, status });
    res.status(201).json(room);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 更新房间
const updateRoom = async (req, res) => {
  try {
    const { id } = req.params;
    const { apartmentId, roomNumber, area, price, status } = req.body;
    const room = await Room.findByPk(id);
    if (!room) {
      return res.status(404).json({ error: '房间不存在' });
    }
    await room.update({ apartmentId, roomNumber, area, price, status });
    res.status(200).json(room);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 删除房间
const deleteRoom = async (req, res) => {
  try {
    const { id } = req.params;
    const room = await Room.findByPk(id);
    if (!room) {
      return res.status(404).json({ error: '房间不存在' });
    }
    await room.destroy();
    res.status(200).json({ message: '房间删除成功' });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

module.exports = {
  getAllRooms,
  getRoomById,
  createRoom,
  updateRoom,
  deleteRoom
};