const express = require('express');
const router = express.Router();
const passport = require('passport');
const fs = require('fs');
const { checkUserExistsAD } = require('../Middlewares/UserIDMiddlewareAD');
const { checkUserExistsDiscord } = require('../Middlewares/UserIDMiddlewareDiscord');
const path = require('path');
const { getUserData, getSetupData } = require('../Middlewares/watcherMiddleware');

let setupData = getSetupData();
let userData = getUserData();

let adStrategy;
if (setupData.ldap !== undefined) {
  adStrategy = require('../models/Passport-ActiveDirectory');
}

let DiscordStrategy;
if (setupData.discord !== undefined) {
  DiscordStrategy = require('../models/Passport-Discord');
}

let user = userData;
if (user.identifyURL) {
    app.get("/auth/discord", (req, res) => {
        res.redirect(user.identifyURL);
    });
} else {
}

router.use(passport.initialize());
router.use(passport.session());

router.get('/login', function(req, res) {
  const setupFilePath = path.join('setup.json');
  const setupData = JSON.parse(fs.readFileSync(setupFilePath, 'utf-8'));
  res.render('AuthLogin', { setupData, isAuthenticated: false, errorMessage: '', showActiveDirectoryForm: true, currentUrl: req.originalUrl });
});

passport.deserializeUser((user, done) => {
  done(null, user);
});

router.get('/logout', (req, res) => {
  req.logout(function(err) {
    if (err) {
      return next(err);
    }
    res.redirect('/auth/login');
  });
});

var opts = { failWithError: true }

router.post('/activedirectory', (req, res, next) => {
  passport.authenticate('ActiveDirectory', opts, (err, user, info) => {
    if (err) {
      return res.render('AuthLogin', { isAuthenticated: false, errorMessage: err.message, setupData: {}, showActiveDirectoryForm: true, currentUrl: req.originalUrl });
    }
    if (!user) { 
      return res.render('AuthLogin', { isAuthenticated: false, errorMessage: 'L\'utilisateur n\'est pas autorisé.', setupData: {}, showActiveDirectoryForm: true, currentUrl: req.originalUrl });
    }
    req.user = {
      ...user._json,
      name: user._json.sAMAccountName,
      id: user._json.sAMAccountName,
    };
    req.logIn(req.user, function(err) {
      if (err) { return next(err); }
      return next();
    });
  })(req, res, next);
}, checkUserExistsAD);

router.get("/discord", (req, res) => {
  res.redirect(setupData.discord.identifyURL);
});

router.get('/discord/callback', (req, res, next) => {
  passport.authenticate('discord', (err, user, info) => {
    if (err) {
      return next(err);
    }

    if (!user) {
      return res.redirect('/auth/login');
    }

    req.logIn(user, (loginErr) => {
      if (loginErr) {
        return next(loginErr);
      }

      checkUserExistsDiscord(req, res, () => {
        if (req.userExists) {
          return res.redirect('/dpanel/dashboard');
        } else {
          createUser(req.user, (createErr) => {
            if (createErr) {
              return next(createErr);
            }
            return res.redirect('/dpanel/dashboard');
          });
        }
      });
    });
  })(req, res, next);
});

module.exports = router;