var async = require('async');
var bcrypt = require('bcrypt-nodejs');
var nodemailer = require('nodemailer');
var User = require('../models/User');

/**
 * GET /reset/:token
 * Reset Password page.
 */

exports.getReset = function(req, res) {
  if (req.isAuthenticated()) {
    return res.redirect('/');
  }

  User
    .where('resetPasswordToken', req.params.token)
    .where('resetPasswordExpires').gt(Date.now())
    .exec(function(err, user) {
      if (!user) {
        req.flash('errors', { msg: 'Password reset token is invalid or has expired.' });
        return res.redirect('/forgot');
      }
      res.render('account/reset', {
        title: 'Password Reset'
      });
    });
};

/**
 * POST /reset/:token
 * Process the reset password request.
 */

exports.postReset = function(req, res, next) {
  req.assert('password', 'Password must be at least 4 characters long.').len(4);
  req.assert('confirm', 'Passwords must match.').equals(req.body.password);

  var errors = req.validationErrors();

  if (errors) {
    req.flash('errors', errors);
    return res.redirect('back');
  }

  async.waterfall([
    function(done) {
      User
        .where('resetPasswordToken', req.params.token)
        .where('resetPasswordExpires').gt(Date.now())
        .exec(function(err, user) {
          if (!user) {
            req.flash('errors', { msg: 'Password reset request is invalid.  It may have expired.' });
            return res.redirect('back');
          }
          done(err, user);
        });
    },
    function(user, done) {
      user.password = req.body.password;
      user.resetPasswordToken = undefined;
      user.resetPasswordExpires = undefined;

      user.save(function(err) {
        if (err) return next(err);
        req.logIn(user, function(err) {
          done(err, user);
        });
      });
    },
    function(user, done) {
      var smtpTransport = nodemailer.createTransport('SMTP', {
        service: 'SendGrid',
        auth: {
          user: secrets.sendgrid.user,
          pass: secrets.sendgrid.password
        }
      });
      var mailOptions = {
        to: user.profile.name + ' <' + user.email + '>',
        from: 'hackathon@starter.com',
        subject: 'Your Hackathon Starter password has been changed',
        text: 'Hello,\n\n' +
          'This is a confirmation that the password for your account ' + user.email + ' has just been changed.\n'
      };
      smtpTransport.sendMail(mailOptions, function(err) {
        done(err);
      });
    }
  ], function(err) {
    if (err) return next(err);
    res.redirect('/');
  });
};