/**
 * Fire openDialog() and prevent links from opening
 *
 * @see openDialog()
 */
function handleDialogEvent(event) {
  openDialog(event.data.element);
  event.preventDefault();
}

/**
 * Display modal dialogs, populate dialog with trigger link's title and href
 *
 * @requires ui.core
 * @requires ui.draggable
 * @requires ui.resizable
 * @requires ui.dialog
 * @see handleDialogEvent()
 *
 * @todo Set ui-dialog-buttonpane button values equal to the original form button value
 * @todo Display loading animation on form submit
 */
function openDialog(element) {
  var sHref = $(element).attr("href");
  var sTitle = $(element).attr("title");
  var eDialog = '<div id="gDialog"></div>';

  $("body").append(eDialog);
  var buttons = {};
  buttons["Submit"] = function() {
    $("#gDialog form").ajaxForm({
      dataType: "json",
      success: function(data) {
        if (data.form) {
          $("#gDialog form").replaceWith(data.form);
        }
        if (data.result == "success") {
          $("#gDialog").dialog("close");
          if (data.location) {
            window.location = data.location;
          } else {
            window.location.reload();
          }
        }
      }
    }).submit();
  };
  buttons["Reset"] = function() {
    $("#gDialog form").resetForm();
  };

  $("#gDialog").dialog({
    autoResize: false,
    draggable: true,
    height: $(window).height() - 40,
    modal: true,
    overlay: {
      opacity: 0.7,
      background: "black"
    },
    resizable: true,
    title: sTitle,
    width: 600,
    buttons: buttons,
    close: function (event, ui) {
      $("#gDialog").dialog('destroy').remove();
    }
  });
  loading("#gDialog");
  $(".ui-dialog-content").height(400);
  $("#gDialog").html(sHref);
  $.get(sHref, function(data) {
    loading("#gDialog");
    $("#gDialog").html(data).hide().fadeIn();
    // Get dialog and it's contents' height
    var contentHt =  $(".ui-dialog-titlebar").height()
        + $(".ui-dialog-content form").height()
        + $(".ui-dialog-buttonpane").height()
        + 60;
    // Resize height if content's shorter than dialog
    if (contentHt < $("#gDialog").data("height.dialog")) {
      $(".ui-dialog").animate({height: contentHt});
    };
  });
  return false;
}

/**
 * Toggle the processing indicator, both large and small
 *
 * @param element ID to which to apply the loading class, including #
 */
function loading(element) {
  var size;
  switch (element) {
    case "#gDialog":
      size = "Large";
      break;
    default:
      size = "Small";
      break;
  }
  $(element).toggleClass("gLoading" + size);
}