const { Rental, Room, Apartment } = 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];
};

// 格式化租房数据
const formatRentalData = (rental) => {
  const formattedRental = {
    ...rental.toJSON(),
    startDate: formatDate(rental.startDate),
    endDate: formatDate(rental.endDate),
    createTime: formatDate(rental.createTime),
    updateTime: formatDate(rental.updateTime)
  };

  return formattedRental;
};

// 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5天后的日期
    const fiveDaysLater = new Date();
    fiveDaysLater.setDate(currentDate.getDate() + 5);

    // 查找所有活跃的租房记录
    const rentals = await Rental.findAll({
      where: { status: 'active', isDeleted: 0 },
      include: [
        {
          model: Room,
          where: { isDeleted: 0 }
        }
      ]
    });

    // 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) {
        // 更新房间附属状态为已到期
        const room = await Room.findByPk(rental.roomId);
        if (room && room.status === 'rented') {
          await room.update({ subStatus: 'expired' });
        }
      } else if (endDate <= fiveDaysLater) {
        // 更新房间附属状态为即将到期
        const room = await Room.findByPk(rental.roomId);
        if (room && room.status === 'rented') {
          await room.update({ subStatus: 'soon_expire' });
        }
      } else {
        // 更新房间附属状态为正常
        const room = await Room.findByPk(rental.roomId);
        if (room && room.status === 'rented') {
          await room.update({ subStatus: 'normal' });
        }
      }
    }

    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);
  }
};

// 获取所有租房（支持搜索和分页）
const getAllRentals = async (req, res) => {
  try {
    // 先检查并更新租房状态
    await checkAndUpdateRentalStatus();

    const {
      apartmentId,
      roomId,
      tenantName,
      status,
      startDateFrom,
      startDateTo,
      endDateFrom,
      endDateTo,
      page = 1,
      pageSize = 10
    } = req.query;

    // 构建查询条件
    const where = { isDeleted: 0 };
    if (status) {
      where.status = status;
    }
    if (roomId) {
      where.roomId = roomId;
    }
    if (tenantName) {
      where.tenantName = { [Op.like]: `%${tenantName}%` };
    }
    if (startDateFrom && startDateTo) {
      where.startDate = { [Op.between]: [new Date(startDateFrom), new Date(startDateTo)] };
    }
    if (endDateFrom && endDateTo) {
      where.endDate = { [Op.between]: [new Date(endDateFrom), new Date(endDateTo)] };
    }

    // 构建包含关系
    const include = [
      {
        model: Room,
        where: {
          isDeleted: 0,
          ...(apartmentId ? { apartmentId } : {})
        },
        include: [
          {
            model: Apartment,
            where: { isDeleted: 0 }
          }
        ]
      }
    ];

    // 计算偏移量
    const offset = (page - 1) * pageSize;

    // 查询租房数据
    const { count, rows } = await Rental.findAndCountAll({
      where,
      include,
      limit: parseInt(pageSize),
      offset: parseInt(offset),
      order: [['createTime', 'DESC']] // 按创建时间倒序排序
    });

    // 格式化数据
    const formattedRentals = rows.map(formatRentalData);

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

// 获取单个租房
const getRentalById = async (req, res) => {
  try {
    const { id } = req.params;
    const rental = await Rental.findOne({
      where: { id, isDeleted: 0 },
      include: [
        {
          model: Room,
          where: { isDeleted: 0 },
          include: [
            {
              model: Apartment,
              where: { isDeleted: 0 }
            }
          ]
        }
      ]
    });
    if (!rental) {
      return res.status(404).json({ error: '租房记录不存在' });
    }
    const formattedRental = formatRentalData(rental);
    res.status(200).json(formattedRental);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 创建租房
const createRental = async (req, res) => {
  try {
    console.log('接收到的请求数据:', req.body);

    // 直接使用req.body中的数据
    const body = req.body;

    // 检查请求体是否存在
    if (!body) {
      return res.status(400).json({ error: '请求体不能为空' });
    }

    // 检查所有必要参数
    if (!body.roomId) {
      return res.status(400).json({ error: '缺少房间ID' });
    }
    if (!body.tenantName) {
      return res.status(400).json({ error: '缺少租客姓名' });
    }
    if (!body.startDate) {
      return res.status(400).json({ error: '缺少开始日期' });
    }
    if (!body.endDate) {
      return res.status(400).json({ error: '缺少结束日期' });
    }
    if (!body.rent) {
      return res.status(400).json({ error: '缺少租金' });
    }

    // 转换roomId为整数类型
    const parsedRoomId = parseInt(body.roomId);
    if (isNaN(parsedRoomId)) {
      return res.status(400).json({ error: '无效的房间ID' });
    }

    // 处理押金，为空时设置为0
    const deposit = body.deposit || 0;
    // 处理已退押金，为空时设置为0
    const refundedDeposit = body.refundedDeposit || 0;

    // 创建租房记录
    console.log('创建租房记录:', {
      roomId: parsedRoomId,
      tenantName: body.tenantName,
      startDate: body.startDate,
      endDate: body.endDate,
      rent: body.rent,
      deposit: deposit,
      refundedDeposit: refundedDeposit,
      status: body.status || 'active',
      remark: body.remark
    });

    const rental = await Rental.create({
      roomId: parsedRoomId,
      tenantName: body.tenantName,
      startDate: body.startDate,
      endDate: body.endDate,
      rent: body.rent,
      deposit: deposit,
      refundedDeposit: refundedDeposit,
      status: body.status || 'active',
      remark: body.remark,
      createBy: req.user.id,
      updateBy: req.user.id
    });

    console.log('租房记录:', rental);

    // 更新房间状态为已租
    await Room.update({ status: 'rented' }, { where: { id: parsedRoomId } });

    res.status(201).json(rental);
  } catch (error) {
    console.error('创建租房记录时出错:', error);
    res.status(500).json({ error: error.message });
  }
};

// 更新租房
const updateRental = async (req, res) => {
  try {
    const { id } = req.params;
    const { roomId, tenantName, startDate, endDate, rent, deposit, refundedDeposit, status, remark } = req.body;
    const rental = await Rental.findOne({
      where: { id, isDeleted: 0 }
    });
    if (!rental) {
      return res.status(404).json({ error: '租房记录不存在' });
    }
    // 处理押金，为空时设置为0
    const updateDeposit = deposit || 0;
    // 处理已退押金，为空时设置为0
    const updateRefundedDeposit = refundedDeposit || 0;
    await rental.update({
      roomId,
      tenantName,
      startDate,
      endDate,
      rent,
      deposit: updateDeposit,
      refundedDeposit: updateRefundedDeposit,
      status,
      remark,
      updateBy: req.user.id
    });
    res.status(200).json(rental);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 删除租房（软删除）
const deleteRental = async (req, res) => {
  try {
    const { id } = req.params;
    const rental = await Rental.findOne({
      where: { id, isDeleted: 0 }
    });
    if (!rental) {
      return res.status(404).json({ error: '租房记录不存在' });
    }
    await rental.update({
      isDeleted: 1,
      updateBy: req.user.id
    });
    res.status(200).json({ message: '租房记录删除成功' });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

// 获取所有租房（不分页）
const listRentals = async (req, res) => {
  try {
    // 先检查并更新租房状态
    await checkAndUpdateRentalStatus();

    const {
      apartmentId,
      roomId,
      tenantName,
      status,
      startDateFrom,
      startDateTo,
      endDateFrom,
      endDateTo
    } = req.query;

    // 构建查询条件
    const where = { isDeleted: 0 };
    if (status) {
      where.status = status;
    }
    if (roomId) {
      where.roomId = roomId;
    }
    if (tenantName) {
      where.tenantName = { [Op.like]: `%${tenantName}%` };
    }
    if (startDateFrom && startDateTo) {
      where.startDate = { [Op.between]: [new Date(startDateFrom), new Date(startDateTo)] };
    }
    if (endDateFrom && endDateTo) {
      where.endDate = { [Op.between]: [new Date(endDateFrom), new Date(endDateTo)] };
    }

    // 构建包含关系
    const include = [
      {
        model: Room,
        where: {
          isDeleted: 0,
          ...(apartmentId ? { apartmentId } : {})
        },
        include: [
          {
            model: Apartment,
            where: { isDeleted: 0 }
          }
        ]
      }
    ];

    // 查询租房数据
    const rentals = await Rental.findAll({
      where,
      include,
      order: [['createTime', 'DESC']] // 按创建时间倒序排序
    });

    // 格式化数据
    const formattedRentals = rentals.map(formatRentalData);

    // 返回结果
    res.status(200).json(formattedRentals);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
};

module.exports = {
  getAllRentals,
  listRentals,
  getRentalById,
  createRental,
  updateRental,
  deleteRental
};