var inline_editing = (function() {

/********************************************************************************************/
/* Global vars */
var prevElement = false;
var actionMarkerVisible = true;
var actionMarkerArray;
var rememberBackgroundColor;
var rememberZoom;
var editMarkerDefinitions;
var parentWindow = parent;

/********************************************************************************************/
/* Global Functions */

var findInfoFromClassName = function(element, regexp) {
  var info;
  var matches = (jQuery(element).attr("class") || "").match(regexp);
  if (matches && matches.length > 1) {
    return matches[1];
  }
};

/****************************************/
/* Hilfsfunktionen für die Hervorhebung */

var stashStyle = function(element)
{
  var nps_style_stash = {};
  jQuery.each(['backgroundColor', 'zoom', 'color'], function(i, property) {
    nps_style_stash[property] = element.css(property);
  });
  element.data('nps_style_stash', nps_style_stash);
};

var highlight = function(element)
{
  // setting the zoom works around incomplete redraws on ie6
  element.css({
    backgroundColor: '#ffffaa',
    zoom: 1,
    color: '#000000'
  });
};

var unstashStyle = function(element)
{
  if (element.data('nps_style_stash')) {
    element.css(element.data('nps_style_stash'));
    element.removeData('nps_style_stash');
  }
};

/********************************************************************************************/
/* Marker Definitions */

/********************************************************************************************/
/* Marker Permission Checking */

var that = {
  setParentWindow: function(new_parent) {
    parentWindow = new_parent;
  },

  attachMarkerMenu: function(marker_menu_target){
    var id = findInfoFromClassName(marker_menu_target, /nps_marker_menu_target_([0-9]+)/);
    var marker_menu = jQuery("#nps_marker_menu_"+id);
    if (marker_menu.length) {
      var definition = that.findMarkerDefinitionForElement(marker_menu);
      var target_pos = marker_menu_target.offset();
      var parent_pos = marker_menu.offsetParent().offset();

      marker_menu.css({
        position: 'absolute',
        left: target_pos.left + definition.offset_left - parent_pos.left,
        top: target_pos.top + definition.offset_top - parent_pos.top
      });

      jQuery(marker_menu).unbind('mouseenter');
      jQuery(marker_menu).mouseenter(function(){
        stashStyle(marker_menu_target);
        highlight(marker_menu_target);
      });
      jQuery(marker_menu).unbind('mouseleave');
      jQuery(marker_menu).mouseleave(function(){
        unstashStyle(marker_menu_target);
      });
    }
  },

  initMarkerMenus: function() {
    var visible = false;
    jQuery('.nps_marker_menu_button').click(function() {
      if (visible) {
        jQuery(this).next().slideUp(200);
        visible = false;
      } else {
        jQuery(this).next().slideDown(200);
        visible = true;
      }
      return false;
    });
  },

  attachMarkerMenus: function() {
    jQuery('.nps_marker_menu_target').each(function() {
      that.attachMarkerMenu(jQuery(this));
    });
  },

  initActionMarker: function() {
    jQuery('.nps_action_marker').each(function(ignore, marker_element) {
      if (!that.hasRequiredPermissionsForMarkerElement(marker_element)) {
         jQuery(marker_element).hide();
      }
    });
  },

  bindEditMarkerEvents: function(marker, target){
    marker.unbind();
    marker.mouseenter(function() {
      target.find("*").each(function() { stashStyle(jQuery(this)); });
      target.find("*").each(function() { highlight(jQuery(this)); });
      stashStyle(target);
      highlight(target);
    });
    marker.mouseleave(function() {
      target.find("*").each(function() { unstashStyle(jQuery(this)); });
      unstashStyle(target);
    });
    marker.click(function() { return that.startEditing(this); });
  },

  initEditMarker: function() {
    // add functions and behaviour to all edit marker elements
    jQuery(".nps_edit_marker").each(function(i, marker) {
      marker = jQuery(marker);
      if (that.hasRequiredPermissionsForMarkerElement(marker)) {
        var id = findInfoFromClassName(marker, /nps_marker_id_([0-9]+)/);
        var target = jQuery("#nps_marker_id_" + id);
        if (target.length) {
          var pos = target.offset();
          var parent_pos = marker.offsetParent().offset();
          that.bindEditMarkerEvents(marker, target);
          marker.css({
            left: pos.left - parent_pos.left,
            top: pos.top - parent_pos.top,
            position: "absolute",
            display: "inline"
          });
        } else {
          marker.hide();
        }
      }
      else {
        marker.hide();
      }
    });
  },

  openEditDialog: function(obj_id, attribute, context_id, size, target) {
    // pass control to Fiona GUI
    parentWindow.openEditDialog(obj_id, attribute, context_id, size, target);
  },

  initMarker: function() {
    that.initEditMarker();
    that.initActionMarker();
    that.initMarkerMenus();
    that.attachMarkerMenus();
  },

  init: function() {
    jQuery(document).ready(that.initMarker);
    jQuery(window).load(that.initMarker);
    jQuery(window).resize(that.initMarker);
  },

  storeMarkerDefinitions: function(definitions) {
    editMarkerDefinitions = editMarkerDefinitions || {};
    jQuery.extend(editMarkerDefinitions, definitions);
  },

  markerDefinition: function(id) {
    return editMarkerDefinitions[id];
  },

  findMarkerDefinitionForElement: function(element) {
    return that.markerDefinition(findInfoFromClassName(element, /nps_marker_id_([0-9]+)/));
  },

  currentUserHasGlobalPermission: function(perm) {
    if (parentWindow.currentUserIsMemberOf) {
      return parentWindow.currentUserHasGlobalPermission(perm);
    }
    else {
      return true;
    }
  },

  currentUserIsMemberOf: function(groups) {
    if (parentWindow.currentUserIsMemberOf) {
      return parentWindow.currentUserIsMemberOf(groups);
    }
    else {
      return true;
    }
  },

  hasRequiredPermissionsForMarkerElement: function(element) {
    if (that.currentUserHasGlobalPermission("permissionGlobalRoot")) { return true; }

    var definition = that.findMarkerDefinitionForElement(element);
    var member_in_group = 0;
    jQuery.each(definition.memberships, function() {
      if (that.currentUserIsMemberOf(this)) {
        member_in_group += 1;
        return true;
      }
      return false;
    });
    return member_in_group === definition.memberships.length;
  },

  startEditing: function(element) {
    var definition = that.findMarkerDefinitionForElement(element);

    // pass control to Fiona GUI
    that.openEditDialog(
      definition.obj_id, definition.attribute, definition.context_id,
      definition.size, definition.target
    );
    return false;
  }

};

return that;

}());