var fs = require("fs")
var uuid = require('uuid')
var path = require("path")
var CryptoJS = require("crypto-js")

module.exports.createUser = (name, password) =>  {

    const passcrypt = CryptoJS.AES.encrypt(password, "D*G-KaPdSgVkYp3s");
    const userUUID = uuid.v4();
    const userData = {
      "username":name,
      "password": passcrypt.toString(),
      "uuid": userUUID,
      "token":{


      }
    }

    fs.writeFileSync(__dirname + path.sep + "users" + path.sep + userUUID + ".json", JSON.stringify(userData, null, 2)) 

}

module.exports.checkToken = (req, res) => {

    const tokens = this.getAllToken()
    const users = this.getUsers()
    
    if(req.cookies.tokenID == null) {
        return false;

    } else if(tokens.has(req.cookies.tokenID)) {
        const user = tokens.get(req.cookies.tokenID)
        const userData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + users.get(user) + ".json", 'utf-8'))

        if(userData.token.livableToken == true) {

            return user;
            
        } else {
            const tokenDate = new Date(userData.token.createdAt)
            const nowDate = new Date(Date.now())

            if(tokenDate.getDay() == nowDate.getDay() && tokenDate.getMonth() == nowDate.getMonth()) {

                return user;
            } else {

                res.clearCookie('tokenID');
                return false;
                
                
            }

        }

    } else {
        return false;
    }

    return false;

    
}

module.exports.getFullName = (username) => {
    const userData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + this.getUUID(username) + ".json", 'utf-8'))
    return userData.fullname

}

module.exports.generateTokenID = (username, userData, req, users) => {
    const tokenID = uuid.v4()
    const date = Date.now()
  
    var newUserData = userData;
    var livable = false;
  
    if(req.body.remindus == true) {
  
      livable = true;
    } 
  
    Object.defineProperties(newUserData, {
      token: {
        value: {
          "tokenID":tokenID,
          "livableToken": livable,
          "createdAt": date
        },
        writable: true
  
      }
  
    })
  
    fs.writeFileSync(__dirname + path.sep + "users" + path.sep + users.get(username) + ".json", JSON.stringify(newUserData, null, 2))
  
    return tokenID
  
}

module.exports.getUsers = () => {

    const users = new Map();

    fs.readdirSync(__dirname + path.sep + "users").forEach(file => {
        const fileData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + file, 'utf-8'))
        users.set(fileData.username, fileData.uuid)

    })

    return users
}

module.exports.getAllToken = () => {

    const token = new Map();

    fs.readdirSync(__dirname + path.sep + "users").forEach(file => {
        const fileData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + file, 'utf-8'))
        token.set(fileData.token.tokenID, fileData.username)

    })

    return token
}

module.exports.getUUID = (username) => {

    const users = new Map();

    fs.readdirSync(__dirname + path.sep + "users").forEach(fileD => {
        
        const fileData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + fileD, 'utf-8'))
        users.set(fileData.username, fileData.uuid)

    })
    return users.get(username);
}


module.exports.changeFullName = (username, req, res) => {

    const userData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + this.getUUID(this.checkToken(req, res)) + ".json", 'utf-8'))
   
    Object.defineProperties(userData, {
        fullname: {
          value: username,
          writable: true
    
        }
    
      })
    
    const user = this.getUUIDRequest(req);

    fs.writeFileSync(__dirname + path.sep + "users" + path.sep + user + ".json", JSON.stringify(userData, null, 2))

}

module.exports.getUUIDRequest = (req) => {

    const users = this.getUsers()
    const tokens = this.getAllToken()
    
    users.get(tokens.get(req.cookies.tokenID))

    if(req.cookies.tokenID == null) {
        
        return false;

    } else if(tokens.has(req.cookies.tokenID)) {
        
        return users.get(tokens.get(req.cookies.tokenID))

    } else {
        
        return false;
    }

   

}

module.exports.changePassword = (req, res) => {



    const userData = JSON.parse(fs.readFileSync(__dirname + path.sep + "users" + path.sep + this.getUUID(this.checkToken(req, res)) + ".json", 'utf-8'))

    const oldp = CryptoJS.AES.encrypt(req.body.additional, "D*G-KaPdSgVkYp3s")
    const newp = CryptoJS.AES.encrypt(req.body.value, "D*G-KaPdSgVkYp3s")

    if(CryptoJS.AES.decrypt(oldp, "D*G-KaPdSgVkYp3s").toString(CryptoJS.enc.Utf8) == CryptoJS.AES.decrypt(userData.password, "D*G-KaPdSgVkYp3s").toString(CryptoJS.enc.Utf8)) {

        
        Object.defineProperties(userData, {
            password: {
            value: newp.toString(),
            writable: true
        
            }
        
        })
        
        const user = this.getUUIDRequest(req);

        fs.writeFileSync(__dirname + path.sep + "users" + path.sep + user + ".json", JSON.stringify(userData, null, 2))
        res.send({"result":"success", "content": "<span style='color:rgb(130, 255, 163);'>Le mot de passe a été changé avec succès.</span>"})
    } else {

        res.send({"result":"success", "content": "Le mot de passe actuel est éronné."})
    }

   

}