// Javascript for user_relationships_ui.module

// Creating our own namespace for the module
Drupal.user_relationships_ui = {};

if (Drupal.jsEnabled) {
  $(document).ready(function() {
    // Any links that we have created in the ui module are
    // Given a click handler so you can display the popup correctly
    $('a.user_relationships_popup_link').click(function(e) {
      var buttoncode = e.which ? e.which : e.button; // msie specific checks does not support e.which
      // If position is fixed, allow for %'s.
      position = Drupal.settings.user_relationships_ui.position.position;
      left = Drupal.settings.user_relationships_ui.position.left;
      xtop = Drupal.settings.user_relationships_ui.position.top;
      
      if(position == "fixed") {
        // If left is defined in a % (.5) calculate left requirement
        if(left <= 1) {
          // Window width * desired - UI width
          left = Math.round(($(window).width()*left) - ($("#user_relationships_popup_form").width()/2));
        }
        // If top is define in a % (.33) calculate top requirement
        if(xtop <= 1) {
          // Window height * desired - UI height (which is an unknown)
          xtop = Math.round(($(window).height()*xtop));// - ($("#user_relationships_popup_form").height()/2));
        }
      } else {
      left = (e.pageX ? e.pageX : e.clientX) + Number(left); // msie specific checks does not support e.page
      if (left + $("#user_relationships_popup_form").width() > $(window).width()) {
        left = (e.pageX ? e.pageX : e.clientX) - $("#user_relationships_popup_form").width();
      }
        xtop = (e.pageY ? e.pageY : e.clientY) + Number(xtop); // msie specific checks does not support e.page
      }
      var href = $(this).attr('href'); // Where we send the ajax request.
      Drupal.user_relationships_ui.showForm(href, position, left, xtop);
      return false;
    });
  });
}

/**
 * Function to display the pertinent form for the user
 *
 * @param href
 *      Ajax url where we will retrieve the form
 * @param pageX
 *      Left value for the event
 * @param pageY
 *      Top value for the event
 */
Drupal.user_relationships_ui.showForm = function(href, position, left, top) {
  // Making sure that any currently open popups will be hidden.
  Drupal.user_relationships_ui.hidePopup();
  // Putting the animation into this

  $('#user_relationships_popup_form')
    .css({top: top + 'px', left: left + 'px', position: position})
    .html(Drupal.user_relationships_ui.loadingAnimation())
    .slideDown();
  // Adding ajax to the href because we need to determine between ajax and regular
  if (href.indexOf('?') == -1) {
    href += '?';
  };
  href += '&ajax=1';
  // Making the ajax request to the server to retrieve the form.
  $.get(href, function(result) {
    $('#user_relationships_popup_form').html(result).slideDown();
    // Making sure the cancel link on each form in the popup closes the popup.
    $('#user_relationships_popup_form a').click(function() {
      Drupal.user_relationships_ui.hidePopup();
      return false;
    });
    //Prevent users from clicking submit button twice
    Drupal.user_relationships_ui.formCheck();
  });
};

/**
 * Function used to return the html that is used to build the.
 * Loading animation when a form is requested by the user.
 */
Drupal.user_relationships_ui.loadingAnimation = function() {
  var html = '<div>';
  html += '<div style="text-align: center; font-weight: bold;">';
  html += Drupal.t('Form Loading');
  html += '</div>';
  html += '<img src="' + Drupal.settings.user_relationships_ui['loadingimage'] + '" border="0" height="20" width="200" />';
  html += '</div>';
  return html;
}

/**
 * Helper function to hide the popup form
 */
Drupal.user_relationships_ui.hidePopup = function() {
  $('#user_relationships_popup_form').slideUp();
}

/**
 * Prevent users from clicking a submit button twice - borrowed from http://drupal.org/project/newswire - thanks, fellows :)
 */
Drupal.user_relationships_ui.formCheck = function() {
  // only apply this to node and comment and new user registration forms
  var forms = $("#user_relationships_popup_form #edit-submit");
  // insert the saving div now to cache it for better performance and to show the loading image
  $('<div id="user_relationships_popup_form_saving"><p class="user_relationships_popup_form_saving">' + Drupal.t('Saving...') + '</p></div>').insertAfter(forms);
  forms.click(function() {
    $(this).siblings("input[type=submit]").hide();
    $(this).hide();
    $("#user_relationships_popup_form_saving").show();
    var notice = function() {
      $('<p id="user_relationships_popup_form_saving_notice">' + Drupal.t('Not saving? Please wait a few seconds, reload this page, and try again.') + '</p>').appendTo("#user_relationships_popup_form_saving").fadeIn();
    };
    // append notice if form saving isn't work, perhaps a timeout issue
    setTimeout(notice, 60000);
  });
};