/* Copyright 2012 Yu-Jie Lin
 * MIT License */

function GAWR(options) {
  var self = this;
  // -----
  this.report = function(entry) {
    // Google Analytics
    function _report() {
      var _gaq = window._gaq || [];
      _gaq.push(['_setAccount', self.model.UA]);
      if (!self.model.page_tracked) {
        _gaq.push(['_trackPageview']);
        self.model.page_tracked = true;
      }
      _gaq.push(['_trackEvent', 'report', entry.issue, entry.info])
      if (!window._gaq)
        window._gaq = _gaq;
      }
    if (window._gaq) {
      _report();
      }
    else {
      $.ajaxSetup({cache: true});
      $.getScript(('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js', _report);
      $.ajaxSetup({cache: false});
      }
    self.view.report_sent();
  }
  // -----
  this.model = new GAWRModel(options);
  this.view = new GAWRView(options.target, this.model, this);
}

function GAWRModel(options) {
  var self = this;
  // -----
  // -----
  this.UA = options.UA;
  this.report_options = options.report_options;
  this.page_tracked = false;
}

function GAWRView(target, model, control) {
  var self = this;
  // -----
  this.create_form = function() {
    var $target = $('#' + self.target).empty();

    var $div = $('<div/>');
    $('<label/>').text('Issue')
                 .attr('for', 'ga-wr-options')
                 .appendTo($div);
    $div.appendTo($target);
    
    $div = $('<div/>');
    var $select = $('<select/>').attr('id', 'ga-wr-options');
    $.each(self.model.report_options, function(idx, opt) {
      $('<option/>').text(opt.title)
                    .appendTo($select);
    });
    $select.appendTo($div);
    $div.appendTo($target);

    $div = $('<div/>');
    $('<label/>').text('Additional information')
                 .attr('for', 'ga-wr-info')
                 .appendTo($div);
    $div.appendTo($target);

    $div = $('<div/>');
    $('<input/>').attr('id', 'ga-wr-info')
                 .attr('placeholder', 'Link or any helpful message')
                 .appendTo($div);
    $div.appendTo($target);

    $div = $('<div/>');
    $('<button/>').text('Report')
                  .click(self.report)
                  .appendTo($div);
    $div.appendTo($target);

    $div = $('<div/>');
    $('<span/>').text('This page URL will be logged automatically when reporting')
                .attr('id', 'ga-wr-message')
                .appendTo($div);
    $div.appendTo($target);
  }

  this.report = function() {
    self.control.report({
      issue: $('#ga-wr-options option:selected').text(),
      info: $('#ga-wr-info').val()
    });
  }

  this.report_sent = function() {
    $('#ga-wr-message').hide()
                       .text('Thanks for reporting!')
                       .fadeIn('slow');
  }
  // -----
  this.target = target;
  this.model = model;
  this.control = control;
  this.create_form();
}