var R = require('ramda'),
  debug = require('debug')('freecc:cntr:challengeMap'), //eslint-disable-line
  User = require('../../models/User'),
  resources = require('./../resources/resources'),
  middleware = require('../resources/middleware'),
  express = require('express'),
  router = express.Router();

router.get('/map',
  middleware.userMigration,
  challengeMap
);

router.get('/learn-to-code', function(req, res) {
  res.redirect(301, '/map');
});

router.get('/about', function(req, res) {
  res.redirect(301, '/map');
});



function challengeMap(req, res, next) {
  var completedList = [];

  if (req.user) {
    completedList = req.user.completedChallenges;
  }

  var noDuplicatedChallenges = R.uniq(completedList);

  var completedChallengeList = noDuplicatedChallenges
    .map(function(challenge) {
      return challenge._id;
    });
  var challengeList = resources.
    getChallengeMapForDisplay(completedChallengeList);

  function numberWithCommas(x) {
    return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
  }

  var date1 = new Date('10/15/2014');
  var date2 = new Date();
  var timeDiff = Math.abs(date2.getTime() - date1.getTime());
  var daysRunning = Math.ceil(timeDiff / (1000 * 3600 * 24));

  User.count({}, function (err, camperCount) {
    if (err) {
      return next(err);
    }
    res.render('challengeMap/show', {
      daysRunning: daysRunning,
      camperCount: numberWithCommas(camperCount),
      title: "A map of all Free Code Camp's Challenges",
      challengeList: challengeList,
      completedChallengeList: completedChallengeList
    });
  });
}

module.exports = router;