const { body, validationResult } = require('express-validator')
const userService = require('../services/userService')
const errorMessages = require('../config/errorMessages')
const successMessages = require('../config/successMessages')

exports.getAllUsers = async (req, res) => {
  try {
    const users = await userService.user_list()
    res.json(users)
  } catch (err) {
    res.status(500).json({ error: err.message })
  }
}

exports.createUser = [
  body('account').isLength({ min: 3 }).withMessage('Account must be at least 3 characters long'),
  body('password').isLength({ min: 6 }).withMessage('Password must be at least 6 characters long'),
  async (req, res, next) => {
    const errors = validationResult(req)
    if (!errors.isEmpty()) {
      const formattedErrors = errors.array().map((err) => ({
        field: err.path, // 错误字段名
        message: err.msg // 错误提示消息
      }))
      return res.status(400).json({ errors: formattedErrors })
    }

    next()
  },
  async (req, res) => {
    try {
      const user = req.body
      await userService.create_user(user)
      res.status(201).json({ message: successMessages.user.created })
    } catch (err) {
      if (err.message === errorMessages.user.already_exists) {
        return res.status(400).json({ error: err.message })
      }
      logger('Error creating user: ', err)
      return res.status(500).json({ error: 'Internal server error' })
    }
  }
]

exports.login = [
  async (req, res, next) => {
    const errors = validationResult(req)
    if (!errors.isEmpty()) {
      const formattedErrors = errors.array().map((err) => ({
        field: err.path, // 错误字段名
        message: err.msg // 错误提示消息
      }))
      return res.status(400).json({ errors: formattedErrors })
    }

    const { account, password } = req.body

    if (!account) {
      return res.status(400).json({ error: errorMessages.user.account_not_match })
    }
    if (!password) {
      return res.status(400).json({ error: errorMessages.user.password_not_match })
    }

    next()
  },
  async (req, res) => {
    try {
      const { account, password } = req.body
      if (account === 'admin' && password === 'admin') {
        req.session.user = { account }
        return res.status(200).json({ message: successMessages.user.login })
      }
      const user = await userService.login(account, password)

      req.session.user = user
      res.status(200).json({ message: successMessages.user.login })
    } catch (err) {
      if (err.message === errorMessages.user.not_found) {
        return res.status(404).json({ error: err.message })
      }
      console.log(err)

      return res.status(500).json({ error: 'Internal server error' })
    }
  }
]