const User = require('../models/User')
const {body, validationResult} = require('express-validator')
const bcrypt = require('bcryptjs')
const jwt = require('jsonwebtoken')
const sharp = require('sharp')
const {secretKey, getID} = require('./../authentication')
const {_sr} = require('../plugins/serverResponses')
const {res404, res500, hasWhiteSpaces, isLatinCharactersWithSymbol, generateRandomDigits, removeWhiteSpaces, checkValidations} = require('../plugins/controllersHelperFunctions')
const fs = require('fs')
const moment = require('moment-jalaali')

module.exports.create_admin = [
  [
    body('username')
       .notEmpty().withMessage(_sr['fa'].required.username)
       .bail()
       .custom((value, {req}) => {
         if (hasWhiteSpaces(value)) return Promise.reject(_sr['fa'].response.whiteSpace)
         return User.findOne({username: value}).then(user => {
           if (user) return Promise.reject(_sr['fa'].duplicated.username)
           else return true
         })
       }),

    body('password')
       .custom((value, {req}) => {
         if (hasWhiteSpaces(value)) return Promise.reject(_sr['fa'].response.whiteSpace)
         if (removeWhiteSpaces(value).length < 4) return Promise.reject(_sr['fa'].min_char.min4)
         if (value !== req.body.password_confirmation) return Promise.reject(_sr['fa'].response.passwords_not_match)
         else return true
       })
  ],
  checkValidations(validationResult),
  async (req, res) => {
    const {username, password} = req.body

    const data = {username, scope: ['admin']}

    try {
      const salt = await bcrypt.genSalt(10)
      const hash = await bcrypt.hash(password, salt)
      data.password = hash

      const admin = new User(data)
      await admin.save()
      return res.json({message: _sr['fa'].response.success_save})
    } catch (e) {
      return res500(res, e)
    }
  }
]

/////////////////////////////////////////////////////////////////////// login
module.exports.login = [
  [
    body('username')
       .isLength({min: 4}).withMessage(_sr['fa'].min_char.min4)
       .bail()
       .if((value, {req}) => {
         return req.body.password && req.body.password.length >= 4
       })
       .custom((value, {req}) => {
         return User.findOne({$or: [{email: value.toLowerCase()}, {username: value}]})
            .then(user => {
              if (!user) return Promise.reject(_sr['fa'].not_found.password)
              else return true
            })
       }),

    body('password')
       .notEmpty().withMessage(_sr['fa'].required.password)
       .bail()
       .isLength({min: 4}).withMessage(_sr['fa'].min_char.min4),

    body('remember_me')
       .exists().withMessage(_sr['fa'].required.remember_me)
       .bail()
       .isBoolean().withMessage(_sr['fa'].format.boolean)
  ],
  checkValidations(validationResult),
  (req, res) => {
    User.findOne({$or: [{email: req.body.username.toLowerCase()}, {username: req.body.username}]}, (err, user) => {
      if (err || !user) return res404(res, err)
      bcrypt.compare(req.body.password, user.password, (err, isMatch) => {
        if (err || !isMatch) return res.status(422).json({validation: {username: {msg: _sr['fa'].not_found.password}}})
        if (user.token) {
          jwt.verify(user.token.replace(/^Bearer\s/, ''), secretKey, (err, decoded) => {
            if (err) {
              let token = jwt.sign({_id: user._id}, secretKey, {expiresIn: req.body.remember_me ? '7d' : '1h'})
              user.token = token
              user.save(err => {
                if (err) console.log(err)
                return res.json({token: token})
              })
            } else return res.json({token: user.token})
          })
        } else {
          let token = jwt.sign({_id: user._id}, secretKey, {expiresIn: req.body.remember_me ? '7d' : '1h'})
          user.token = token
          user.save(err => {
            if (err) console.log(err)
            return res.json({token: token})
          })
        }
      })
    })
  }
]

/////////////////////////////////////////////////////////////////////// logout
module.exports.logout = [
  (req, res) => {
    const token = req.headers.authorization
    if (token) {
      User.findOneAndUpdate({token: token}, {token: null}, (err, oldData) => {
        if (err || !oldData) res.status(401).json({message: 'Your not logged in'})
        else return res.json({message: 'You are logged out.'})
      })
    } else {
      return res.status(401).json({message: 'Your not logged in'})
    }
  }
]

/////////////////////////////////////////////////////////////////////// get user
module.exports.getUser = [
  (req, res) => {
    const token = req.headers.authorization
    if (token) {
      jwt.verify(token, secretKey, (err, decoded) => {
        if (err) return res.status(401).json({message: 'unauthenticated'})
        User.findById(decoded._id, (err, user) => {
          if (err || !user) return res404(res, err)
          else return res.json({user: user})
        })
      })
    } else {
      return res.status(401).json({message: 'unauthenticated'})
    }
  }
]