const moment = require('moment');
const Validator = require('validatorjs');
const Helper = require('../library/LibHelper');
const UsersModels = require('../models/UsersModels');
const LibPassword = require('../library/LibPassword');
const LibJwt = require('../library/LibJwt');
const response = require('../config/response');

Validator.useLang('en');

class AuthController {

  async register(req, res) {
    let apiRes = {};
    try {
      const now = moment().unix();

      // input validation
      const input = {
        first_name: req.body.first_name,
        last_name: req.body.last_name,
        email: req.body.email,
        password: req.body.password,
        crt_at: moment.unix(now).format('YYYY-MM-DD HH:mm:ss'),
        updt_at: moment.unix(now).format('YYYY-MM-DD HH:mm:ss'),
      };
      const rulesInput = {
        first_name: 'required|string|max:45',
        last_name: 'required|string|max:45',
        email: 'required|email|max:45',
        password: 'required|string|min:6|max:16',
      };
      const isInputValid = new Validator(input, rulesInput);
      if (isInputValid.fails()) {
        apiRes = JSON.parse(JSON.stringify(response[422]));
        apiRes.meta.message += Helper.setErrMsg(': ' + Object.values(isInputValid.errors.all())[0][0]); // get first message
 
        return res.status(200).json(apiRes);
      }

      // check email unique
      const getUsers = await UsersModels.findEmail(input.email);
      if (getUsers.length > 0) {
        apiRes.meta = response['email_unique'].meta;
        return res.status(200).json(apiRes);
      }

      // create account
      input.password = await LibPassword.hashPw(input.password); // hash password
      const respCreateUser = await UsersModels.create(input);

      // success response
      apiRes.meta = response[201].meta;
      apiRes.data = (await UsersModels.find(respCreateUser.insertId))[0];
      return res.status(201).json(apiRes);
    } catch (e) {
      apiRes = JSON.parse(JSON.stringify(response[500]));
      apiRes.meta.message += Helper.setErrMsg(': ' + e.message);
      return res.status(500).json(apiRes);
    }
  }

  async login(req, res) {
    let apiRes = {}
    try {
      const now = moment().unix()

      // input validation
      const input = {
        email: req.body.email,
        password: req.body.password,
      };
      const rulesInput = {
        email: 'required|email',
        password: 'required|string',
      };
      const isInputValid = new Validator(input, rulesInput);
      if (isInputValid.fails()) {
        apiRes = JSON.parse(JSON.stringify(response[422]));
        apiRes.meta.message += Helper.setErrMsg(': ' + Object.values(isInputValid.errors.all())[0][0]); // get first message
 
        return res.status(200).json(apiRes);
      }

      // login
      const getUsers = await UsersModels.findEmail(input.email);
      if (getUsers.length < 1) {
        apiRes = JSON.parse(JSON.stringify(response[404]));
        return res.status(200).json(apiRes);
      }
      const isPwValid = await LibPassword.checkPw(getUsers[0].password, input.password);
      if (!isPwValid) {
        apiRes.meta = response['wrong_password'].meta;
        return res.status(200).json(apiRes);
      }

      await UsersModels.update({is_login: 1}, getUsers[0].id);

      // success response
      const jwt = await LibJwt.createToken({
        uid: getUsers[0].id
      });
      apiRes = JSON.parse(JSON.stringify(response[200]));
      apiRes.meta.message = 'success login';
      apiRes.data = getUsers[0];
      apiRes.token = jwt.token;
      return res.status(200).json(apiRes);
    } catch (e) {
      apiRes = JSON.parse(JSON.stringify(response[500]));
      apiRes.meta.message += Helper.setErrMsg(': ' + e.message);
      return res.status(500).json(apiRes);
    }
  }

  async profile(req, res) {
    let apiRes = {}
    try {
      const now = moment().unix();
      const { uid } = req.jwt;
      
      const getUsers = await UsersModels.find(uid);
      if (getUsers.length < 1) {
        apiRes = JSON.parse(JSON.stringify(response[404]));
        return res.status(200).json(apiRes);
      }

      delete getUsers[0].password;

      apiRes = JSON.parse(JSON.stringify(response[200]));
      apiRes.data = getUsers[0];
      return res.status(200).json(apiRes);
    } catch (e) {
      apiRes = JSON.parse(JSON.stringify(response[500]));
      apiRes.meta.message += Helper.setErrMsg(': ' + e.message);
      return res.status(500).json(apiRes);
    }
  }

  async logout(req, res) {
    let apiRes = {}
    try {
      const now = moment().unix();
      const { uid } = req.jwt;
      
      const getUsers = await UsersModels.find(uid);
      if (getUsers.length < 1) {
        apiRes = JSON.parse(JSON.stringify(response[404]));
        return res.status(200).json(apiRes);
      }

      await UsersModels.update({is_login: 0}, uid);

      apiRes = JSON.parse(JSON.stringify(response[200]));
      apiRes.meta.message = 'success logout';
      return res.status(200).json(apiRes);
    } catch (e) {
      apiRes = JSON.parse(JSON.stringify(response[500]));
      apiRes.meta.message += Helper.setErrMsg(': ' + e.message);
      return res.status(500).json(apiRes);
    }
  }

}

const object = new AuthController();

module.exports = object;