var version      = '1.1', 
    update_url   = 'http://adriankenny.com/assets/file/analytics/version.txt',
    download_url = 'http://analyticswidget.com/download/';

// Function: load()
// Called by HTML body element's onload event when the widget is ready to start
function load()
{	
	if (window.widget)
	{
	  KeyChainAccess.setAppName('Analytics');
	
	  var email      = widget.preferenceForKey(keyWithIdentifier('email')),
	      gaid       = JSON.parse(widget.preferenceForKey(keyWithIdentifier('gaid'))),
        gaid_list  = JSON.parse(widget.preferenceForKey(keyWithIdentifier('gaid-list'))),
        site_name  = widget.preferenceForKey(keyWithIdentifier('site-name')),
	      
	      password   = KeyChainAccess.loadPassword(email),

	      today      =	widget.preferenceForKey(keyWithIdentifier('visits-today')),
	      yesterday  =	widget.preferenceForKey(keyWithIdentifier('visits-yesterday')),
	      this_week  =	widget.preferenceForKey(keyWithIdentifier('visits-this-week')),
	      this_month =	widget.preferenceForKey(keyWithIdentifier('visits-this-month')),
	      this_year  =	widget.preferenceForKey(keyWithIdentifier('visits-this-year'));
	      
	  if (email && email.length > 0) {
	    $('#email').val(email);
	  }
	  
	  if (email && email.length > 0)
	  {
	    $('#password').val(password);
	  }
    
    if (today.length > 0)
    {
      $('#site-name').text(gaid.name),
      $('#visits-today').text(today),
      $('#visits-yesterday').text(yesterday),
      $('#visits-this-week').text(this_week),
      $('#visits-this-month').text(this_month),
      $('#visits-this-year').text(this_year);
    }
    
    $.each(gaid_list, function(name, value) {
      if (gaid.id === value)
      {
        $('#google-account-profiles').append('<option value="' + value + '" selected="true">' + name + '</option>');      
      }
      else
      {
        $('#google-account-profiles').append('<option value="' + value + '">' + name + '</option>');
      }
    });
    
    checkWidgetVersion();
    checkIfWeShouldEnableOrDisableDoneButton();
	}
}

function remove()
{
    // Stop any timers to prevent CPU usage and remove any preferences as needed.
    if (window.widget) {
    	widget.setPreferenceForKey(null, keyWithIdentifier('email'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('gaid'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('gaid-list'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('site-name'));
    	
    	widget.setPreferenceForKey(null, keyWithIdentifier('visits-today'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('visits-yesterday'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('visits-this-week'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('visits-this-month'));
    	widget.setPreferenceForKey(null, keyWithIdentifier('visits-this-year'));

      widget.setPreferenceForKey(null, keyWithIdentifier('successful-login'));
    }
}

function hide()
{
    // Stop any timers to prevent CPU usage.
    saveWidgetSettings();
}

function show()
{
    // Restart any timers that were stopped on hide.
    checkWidgetVersion();
}
function sync(){
    // Sync stuff here..
}

// Function: showBack(event)
// Called when the info button is clicked to show the back of the widget
//
// event: onClick event from the info button
function showBack(event)
{
    var front = document.getElementById('front');
    var back = document.getElementById('back');

    if (window.widget) {
        widget.prepareForTransition('ToBack');
    }

    front.style.display = 'none';
    back.style.display = 'block';

    if (window.widget) {
        setTimeout('widget.performTransition();', 0);
    }
}

// Function: showFront(event)
// Called when the done button is clicked from the back of the widget
//
// event: onClick event from the done button
function showFront(event)
{
    var front = document.getElementById('front');
    var back = document.getElementById('back');

    if (window.widget) {
        widget.prepareForTransition('ToFront');
    }

    front.style.display='block';
    back.style.display='none';

    if (window.widget) {
        setTimeout('widget.performTransition();', 0);
    }
}

if (window.widget) {
    widget.onremove = remove;
    widget.onhide   = hide;
    widget.onshow   = show;
    widget.onsync   = sync;
}

// Get profles
function getAccountProfiles() {
  // Disable some ui.
  $('#google-account-login').attr('disabled', true).addClass('disabled');
  
  // Clear previous data
  $('#visits-today, #visits-yesterday, #visits-this-week, #visits-this-month, #visits-this-year').text('');
  
  // If we run this a second time we should clear the previous set of options.
  $('#google-account-profiles option').remove();
  
  var filename     = 'responses/accounts-' + widget.identifier + '.json',
      email        = encodeURIComponent( $('#email').val() ), 
      password     = encodeURIComponent( $('#password').val() ), 
      accountsfeed = new String(),
      
      cmd = 'curl "https://www.google.com/analytics/feeds/accounts/default?prettyprint=false&alt=json" -s --header "Authorization: GoogleLogin $(curl https://www.google.com/accounts/ClientLogin -s -d Email=' + email + ' -d Passwd=' + password + ' -d accountType=GOOGLE -d  source=curl-accountFeed-v1 -d service=analytics | awk /Auth=.*/)" > ' + filename,
  
      command = widget.system(cmd, endHandler);
  
  $('#notice').text('Fetching accounts…').fadeIn('fast');
    
  function endHandler(command) 
  {
    $.ajax({
        type: 'GET',
        url: filename,
        dataType: 'json',
        success: function(data) {
          for (var i = 0; i < data.feed.entry.length; i++) { 
            $('#google-account-profiles').append('<option value="' + data.feed.entry[i].id.$t.replace('http://www.google.com/analytics/feeds/accounts/ga:','') + '">' + data.feed.entry[i].title.$t + '</option>');
            $('#google-account-profiles, #google-account-done, #google-account-login').attr('disabled', false).removeClass('disabled');
            $('#notice').fadeOut('fast');
          }
          widget.setPreferenceForKey('1', keyWithIdentifier('successful-login'));
        },
        error: function() {
          widget.setPreferenceForKey('0', keyWithIdentifier('successful-login'));
          $('#google-account-login').attr('disabled', false).removeClass('disabled');
          $('#notice').text('Fetching failed.').delay(2000).fadeOut('fast');
        },
        complete: function() {
          checkIfWeShouldEnableOrDisableDoneButton();
        }
    });
  }
}

// Get total visits for each timeframe.
function getData() {
  var successful_login = widget.preferenceForKey(keyWithIdentifier('successful-login'));
  
  if (successful_login == '1')
  {
    $('#refresh').addClass('disabled');
  
    // Clear previous data
    $('#site-name, #visits-today, #visits-yesterday, #visits-this-week, #visits-this-month, #visits-this-year').text('');
    
    // I'm getting total visits for each timeframe. This seems hugely inefficient. Got to refactor this at some point.
    getTotalVisitsForTimePeriod(
      'visits-today', 
      Date.today().toString('yyyy-MM-dd'), 
      Date.today().toString('yyyy-MM-dd')
    );
  
    getTotalVisitsForTimePeriod( 
      'visits-yesterday', 
      Date.today().add(-1).days().toString('yyyy-MM-dd'), 
      Date.today().add(-1).days().toString('yyyy-MM-dd')
    );
  
    getTotalVisitsForTimePeriod( 
      'visits-this-week', 
      Date.today().addWeeks(-1).toString('yyyy-MM-dd'), 
      Date.today().toString('yyyy-MM-dd')
    );
  
    getTotalVisitsForTimePeriod( 
      'visits-this-month', 
      Date.today().moveToFirstDayOfMonth().toString('yyyy-MM-dd'), 
      Date.today().toString('yyyy-MM-dd')
    );
  
    getTotalVisitsForTimePeriod( 
      'visits-this-year', 
      Date.today().set({ month: 0, day: 1 }).toString('yyyy-MM-dd'), 
      Date.today().toString('yyyy-MM-dd')
    );
  
    $('#visits-today, #visits-yesterday, #visits-this-week, #visits-this-month, #visits-this-year').each(function() {
      var id = $(this).attr('id');
  
      $.ajax({
          type: 'GET',
          url: 'responses/analyze-' + id + '-' + widget.identifier + '.json',
          dataType: 'json',
          success: function(data) {
            // Send metrics to front.
            $('#' + id).html(addCommas(data.feed.dxp$aggregates.dxp$metric[0].value));
            
            // Enable refresh button on front.
            $('#refresh').removeClass('disabled');
          }
      });
    });
    
    
    $('#site-name').text( $('#google-account-profiles :selected').text() );
    
    showFront();
  }
}

// Get total visits during specified time frame.
function getTotalVisitsForTimePeriod(timeframe, start, end) {
  if (window.widget) {
    var filename = 'responses/analyze-' + timeframe + '-' + widget.identifier + '.json', 
        email    = encodeURIComponent( $('#email').val() ), 
        gaid     = $('#google-account-profiles :selected').val(), 
        password = encodeURIComponent( $('#password').val() ), 
    
        cmd = 'curl "https://www.google.com/analytics/feeds/data?start-date=' + start + '&end-date=' + end + '&dimensions=ga:date&metrics=ga:uniquePageviews&ids=ga:' + gaid + '&prettyprint=false&alt=json&max-results=0" -s --header "Authorization: GoogleLogin $(curl https://www.google.com/accounts/ClientLogin -s -d Email=' + email + ' -d Passwd=' + password + ' -d accountType=GOOGLE -d source=curl-accountFeed-v1 -d service=analytics | awk /Auth=.*/)" --header "GData-Version: 2" > ' + filename; 
    
    widget.system(cmd, null);
  }
}
function getTotalUniqueVisitsForTimePeriod(timeframe, start, end) {
  if (window.widget) {
    var filename = 'responses/analyze-' + timeframe + '-' + widget.identifier + '.json', 
        email    = encodeURIComponent( $('#email').val() ), 
        gaid     = $('#google-account-profiles :selected').val(), 
        password = encodeURIComponent( $('#password').val() ), 
    
        cmd = 'curl "https://www.google.com/analytics/feeds/data?start-date=' + start + '&end-date=' + end + '&dimensions=ga:date&metrics=ga:visits&ids=ga:' + gaid + '&prettyprint=false&alt=json&max-results=0" -s --header "Authorization: GoogleLogin $(curl https://www.google.com/accounts/ClientLogin -s -d Email=' + email + ' -d Passwd=' + password + ' -d accountType=GOOGLE -d source=curl-accountFeed-v1 -d service=analytics | awk /Auth=.*/)" --header "GData-Version: 2" > ' + filename; 
    
    widget.system(cmd, null);
  }
}

// Save [email, password, and google profile id, visits].
function saveWidgetSettings() {
  var email      = $('#email').val(),
      gaid         = new Object(),
      gaid_list  = new Object(),
      password   = $('#password').val(),
      
      today      = $('#visits-today').text(),
      yesterday  = $('#visits-yesterday').text(),
      this_week  = $('#visits-this-week').text(),
      this_month = $('#visits-this-month').text(),
      this_year  = $('#visits-this-year').text();
      
      gaid['id']   = $('#google-account-profiles :selected').val();
      gaid['name'] = $('#google-account-profiles :selected').text();
      
      $('#google-account-profiles option').each(function() {
        var $this = $(this), name = $this.text(), val = $this.val()
        
        gaid_list[name] = val;
      });
      
      gaid      = JSON.stringify(gaid);
      gaid_list = JSON.stringify(gaid_list);
      
  if (window.widget) {
    // Save email and gaid
    widget.setPreferenceForKey(email,     keyWithIdentifier('email'));
    widget.setPreferenceForKey(gaid,      keyWithIdentifier('gaid'));
    
    widget.setPreferenceForKey(gaid_list,  keyWithIdentifier('gaid-list'));
    
    // Save the metrics to prefs.
    widget.setPreferenceForKey(today,      keyWithIdentifier('visits-today'));
    widget.setPreferenceForKey(yesterday,  keyWithIdentifier('visits-yesterday'));
    widget.setPreferenceForKey(this_week,  keyWithIdentifier('visits-this-week'));
    widget.setPreferenceForKey(this_month, keyWithIdentifier('visits-this-month'));
    widget.setPreferenceForKey(this_year,  keyWithIdentifier('visits-this-year'));
    
    if (password.length > 0) KeyChainAccess.savePassword(email, password);
  }
}

// Helper function to format numbers with commas.
function addCommas(number)
{
	number += '';
	x = number.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	
	var regex = /(\d+)(\d{3})/;
	
	while (regex.test(x1)) {
		x1 = x1.replace(regex, '$1' + ',' + '$2');
	}
	
	return x1 + x2;
}

// Helper function to save settings with a unique identifier key (so we can have multiple instaces of this widget).
function keyWithIdentifier(key) {
	return widget.identifier + '-' + key;
}

function checkIfWeShouldEnableOrDisableDoneButton() {
  if ( widget.preferenceForKey(keyWithIdentifier('successful-login')) == '1' )
  {
    $('#google-account-done').attr('disabled', false).removeClass('disabled');
    $('#refresh').removeClass('disabled');
  }
  else
  {
    $('#google-account-done').attr('disabled', true).addClass('disabled');
    $('#refresh').addClass('disabled');
  }
}

function checkWidgetVersion() {  
  $.get(update_url, function(latest) {
    if ( version < latest ) $('#new-version').show();
  });
}

function openSite (url) {
	if (window.widget) {
		widget.openURL(url); return false;
	}
	return true;
}