;(function($, undefined){

  var tracker = null;

  OATHSurveyTracker = {

    init: function(slideLabel) {
      tracker = this;
      tracker.obj = {};
      tracker.optionLabel = '';
      tracker.savedData = '';

      tracker.slide = slideLabel;
      tracker.slideLabel = 'OATH Slide',
      tracker.userLabel = 'OATH User',
      tracker.$options = $('.slide-object.shown.cursor-hover');
      tracker.$options.click(tracker.track);
      console.log('Tracker is initialized');
    },

    cleanResults: function(allUsers) {
      var acceptableVals = [
            'Upset', 'Fine', 'Frustrated', 'Good', 'Confused', 'Skip this question',
            'Yes', 'No, I already knew most of it', 'A little, but I still have questions',
          ];

      for (var user in allUsers) {
        for (var slide in allUsers[user]) {
          if (acceptableVals.indexOf(allUsers[user][slide]) < 0) {
            delete allUsers[user][slide];
          }
        }
      }

      return allUsers;
    },

    clearStorage: function() {
      if (localStorage) {
        var i = 0;

        while (i < localStorage.length) {
          key = localStorage.key(i);

          if (key.indexOf(tracker.userLabel) > -1) {
            localStorage.removeItem(key);
          } else {
            i++;
          }
        }
      }
      console.log('OATH survey results have been reset.');
    },

    getResults: function() {
      var allUsers = {},
          results;

      allUsers = tracker.fetchUsers(allUsers);
      results = tracker.cleanResults(allUsers);
      return results;
    },

    displayResults: function() {
      console.log(tracker.getResults());
    },

    downloadResults: function() {
      results = tracker.getResults();
      var headerRow = ["User", "First Question", "Second to Last Question", "Last Question"],
          csvContent = "data:text/csv;charset=utf-8,";

      csvContent += headerRow + "\r\n"; // add carriage return

      for (var user in results) {
        var row = [user];
        for (var slide in results[user]) {
          row.push('"' + results[user][slide] + '"');
        }
        row = row.join(',');
        csvContent += row + "\r\n";
      }

      var encodedUri = encodeURI(csvContent);
      window.open(encodedUri);
    },

    fetchUsers: function(allUsers) {
      var key;

      if (localStorage) {
        for (var i = 0; i < localStorage.length; i++) {
          key = localStorage.key(i);

          if (key.indexOf(tracker.userLabel) > -1) {
            var slideResults = localStorage.getItem(key);
            allUsers[key] = JSON.parse(slideResults);
          }

        }
      }

      return allUsers;
    },

    resetResults: function() {
      var yesReset = confirm("Are you sure you want to reset all the survey results for this computer? This can't be undone.");
      if (yesReset) tracker.clearStorage();
    },

    setUser: function() {
      var key,
          user,
          users = [];

      if (localStorage) {
        for (var i = 0; i < localStorage.length; i++) {
          key = localStorage.key(i);

          if (key.indexOf(tracker.userLabel) > -1) {
            users.push(key);
          }
        }
      }

      tracker.user = tracker.userLabel + ' ' + (users.length + 1);
    },

    track: function(e) {
      tracker.optionLabel = $(this).attr('aria-label');
      console.log('User clicked: ' + tracker.optionLabel);

      if (localStorage) {
        tracker.savedData = localStorage.getItem(tracker.user);

        if (tracker.savedData) {
          tracker.obj = JSON.parse(tracker.savedData);
        }

        tracker.obj[tracker.slide] = tracker.optionLabel;
        localStorage.setItem(tracker.user, JSON.stringify(tracker.obj));
      }

    },

  }

  // One file load, init once and then set this session's user
  OATHSurveyTracker.init();
  OATHSurveyTracker.setUser();

})(jQuery);