const userMapper = require('../repositories/userRepository')
const logger = require('morgan')
const messages = require('../config/messages')
const { comparePassword } = require('../utils/hashUtils')

/**
 * 用户登录
 * @param {string} account - 用户账号
 * @param {string} password - 用户密码
 * @returns {Promise<Object>} - 登录成功返回用户信息
 * @throws {Error} - 如果用户不存在或密码不正确
 */
exports.login = async (account, password) => {
  const user = await userMapper.selectUserByAccount(account)

  // 用户不存在
  if (!user) {
    throw new Error(messages.user.not_found)
  }

  // 密码不匹配
  const isMatch = await comparePassword(password, user.password)
  if (!isMatch) {
    throw new Error(messages.user.password_incorrect)
  }

  // 更新用户的最后登录时间
  user.last_login_date = new Date()
  await userMapper.updateUserByLoginDate(user.id, user.last_login_date)

  return user
}

/**
 *
 * @param {string} account
 * @returns {Promise<boolean>}
 */
exports.get_user_exist = async (account) => {
  return userMapper.selectUserByAccountExist(account)
}

// Removed the unnecessary try-catch block and simplified the function
exports.user_list = async () => {
  return await userMapper.selectAllUser()
}

exports.getUserList = async (searchQuery) => {
  return userMapper.selectUserList(searchQuery)
}

/**
 * 创建用户
 * @param {Object} user - 用户对象
 * @returns {Promise<Object>} - 创建成功的用户信息
 * @throws {Error} - 如果用户已存在或事务失败
 */
exports.createUser = async (user) => {
  const { account } = user
  const session = await userMapper.startTransaction()

  try {
    // 检查用户是否已存在
    const existingUser = await userMapper.selectUserByAccount(account)
    if (existingUser) {
      return new Error(messages.user.already_exists)
    }

    // 创建新用户
    const result = await userMapper.createUser(user)

    // 提交事务
    await userMapper.commitTransaction(session)
    return result
  } catch (err) {
    // 回滚事务
    await userMapper.rollbackTransaction(session).catch((rollbackErr) => {
      logger('Error rolling back transaction: ', rollbackErr)
    })
    throw err // 将错误抛给调用方（Controller 层）
  }
}