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

// 获取租客列表（分页）
const getRenters = async (req, res) => {
  try {
    const { page = 1, pageSize = 10, keyword, status } = req.query;
    const tenantId = req.tenantId;

    const where = { tenantId, isDeleted: 0 };

    if (keyword) {
      where[Op.or] = [
        { name: { [Op.like]: `%${keyword}%` } },
        { phone: { [Op.like]: `%${keyword}%` } },
        { idCard: { [Op.like]: `%${keyword}%` } }
      ];
    }

    if (status) {
      where.status = status;
    }

    const { count, rows } = await Renter.findAndCountAll({
      where,
      order: [['createTime', 'DESC']],
      offset: (page - 1) * pageSize,
      limit: parseInt(pageSize)
    });

    res.json({
      code: 200,
      data: {
        list: rows,
        pagination: {
          total: count,
          page: parseInt(page),
          pageSize: parseInt(pageSize)
        }
      }
    });
  } catch (error) {
    console.error('获取租客列表失败:', error);
    res.status(500).json({
      code: 500,
      message: '获取租客列表失败'
    });
  }
};

// 获取租客列表（不分页）
const getRenterList = async (req, res) => {
  try {
    const { keyword, status } = req.query;
    const tenantId = req.tenantId;

    const where = { tenantId, isDeleted: 0 };

    if (keyword) {
      where[Op.or] = [
        { name: { [Op.like]: `%${keyword}%` } },
        { phone: { [Op.like]: `%${keyword}%` } },
        { idCard: { [Op.like]: `%${keyword}%` } }
      ];
    }

    if (status) {
      where.status = status;
    }

    const rows = await Renter.findAll({
      where,
      order: [['createTime', 'DESC']]
    });

    res.json({
      code: 200,
      data: rows
    });
  } catch (error) {
    console.error('获取租客列表失败:', error);
    res.status(500).json({
      code: 500,
      message: '获取租客列表失败'
    });
  }
};

// 获取租客详情
const getRenterById = async (req, res) => {
  try {
    const { id } = req.params;
    const tenantId = req.tenantId;

    const renter = await Renter.findOne({
      where: { id, tenantId, isDeleted: 0 }
    });

    if (!renter) {
      return res.status(404).json({
        code: 404,
        message: '租客不存在'
      });
    }

    // 获取租客的租赁记录
    const rentals = await Rental.findAll({
      where: { renterId: id, tenantId },
      include: [
        {
          model: Room,
          attributes: ['id', 'roomNumber'],
          include: [
            {
              model: Apartment,
              attributes: ['id', 'name']
            }
          ]
        }
      ],
      order: [['createTime', 'DESC']]
    });

    res.json({
      code: 200,
      data: {
        ...renter.toJSON(),
        rentals
      }
    });
  } catch (error) {
    console.error('获取租客详情失败:', error);
    res.status(500).json({
      code: 500,
      message: '获取租客详情失败',
      error: error.message
    });
  }
};

// 创建租客
const createRenter = async (req, res) => {
  try {
    const tenantId = req.tenantId;
    const createBy = req.user.id;

    const {
      name,
      phone,
      email,
      idCard,
      gender,
      birthday,
      emergencyContact,
      emergencyPhone,
      address,
      workUnit,
      remark
    } = req.body;

    // 验证必填字段
    if (!name) {
      return res.status(400).json({
        code: 400,
        message: '租客姓名不能为空'
      });
    }

    // 检查手机号是否已存在
    if (phone) {
      const existingRenter = await Renter.findOne({
        where: { phone, tenantId, isDeleted: 0 }
      });
      if (existingRenter) {
        return res.status(400).json({
          code: 400,
          message: '该手机号已存在'
        });
      }
    }

    const renter = await Renter.create({
      name,
      phone,
      email,
      idCard,
      gender,
      birthday,
      emergencyContact,
      emergencyPhone,
      address,
      workUnit,
      remark,
      tenantId,
      createBy,
      status: 'active'
    });

    res.json({
      code: 200,
      message: '创建成功',
      data: renter
    });
  } catch (error) {
    console.error('创建租客失败:', error);
    res.status(500).json({
      code: 500,
      message: '创建租客失败'
    });
  }
};

// 更新租客
const updateRenter = async (req, res) => {
  try {
    const { id } = req.params;
    const tenantId = req.tenantId;
    const updateBy = req.user.id;

    const renter = await Renter.findOne({
      where: { id, tenantId, isDeleted: 0 }
    });

    if (!renter) {
      return res.status(404).json({
        code: 404,
        message: '租客不存在'
      });
    }

    const {
      name,
      phone,
      email,
      idCard,
      gender,
      birthday,
      emergencyContact,
      emergencyPhone,
      address,
      workUnit,
      remark,
      status
    } = req.body;

    // 检查手机号是否被其他租客使用
    if (phone && phone !== renter.phone) {
      const existingRenter = await Renter.findOne({
        where: { phone, tenantId, isDeleted: 0, id: { [Op.ne]: id } }
      });
      if (existingRenter) {
        return res.status(400).json({
          code: 400,
          message: '该手机号已被其他租客使用'
        });
      }
    }

    await renter.update({
      name,
      phone,
      email,
      idCard,
      gender,
      birthday,
      emergencyContact,
      emergencyPhone,
      address,
      workUnit,
      remark,
      status,
      updateBy
    });

    res.json({
      code: 200,
      message: '更新成功',
      data: renter
    });
  } catch (error) {
    console.error('更新租客失败:', error);
    res.status(500).json({
      code: 500,
      message: '更新租客失败'
    });
  }
};

// 删除租客
const deleteRenter = async (req, res) => {
  try {
    const { id } = req.params;
    const tenantId = req.tenantId;

    const renter = await Renter.findOne({
      where: { id, tenantId, isDeleted: 0 }
    });

    if (!renter) {
      return res.status(404).json({
        code: 404,
        message: '租客不存在'
      });
    }

    // 检查是否有进行中的租赁
    const activeRentals = await Rental.count({
      where: {
        tenantName: renter.name,
        tenantId,
        status: 'active'
      }
    });

    if (activeRentals > 0) {
      return res.status(400).json({
        code: 400,
        message: '该租客有进行中的租赁，无法删除'
      });
    }

    await renter.update({ isDeleted: 1 });

    res.json({
      code: 200,
      message: '删除成功'
    });
  } catch (error) {
    console.error('删除租客失败:', error);
    res.status(500).json({
      code: 500,
      message: '删除租客失败'
    });
  }
};

// 获取租客下拉列表（用于租赁表单）
const getRenterOptions = async (req, res) => {
  try {
    const tenantId = req.tenantId;
    const { keyword } = req.query;

    const where = { tenantId, isDeleted: 0, status: 'active' };

    if (keyword) {
      where[Op.or] = [
        { name: { [Op.like]: `%${keyword}%` } },
        { phone: { [Op.like]: `%${keyword}%` } }
      ];
    }

    const renters = await Renter.findAll({
      where,
      attributes: ['id', 'name', 'phone'],
      order: [['name', 'ASC']],
      limit: 50
    });

    res.json({
      code: 200,
      data: renters.map(r => ({
        value: r.id,
        label: `${r.name} ${r.phone ? '(' + r.phone + ')' : ''}`
      }))
    });
  } catch (error) {
    console.error('获取租客选项失败:', error);
    res.status(500).json({
      code: 500,
      message: '获取租客选项失败'
    });
  }
};

module.exports = {
  getRenters,
  getRenterList,
  getRenterById,
  createRenter,
  updateRenter,
  deleteRenter,
  getRenterOptions
};