if(typeof SiteTreeHandlers == 'undefined') SiteTreeHandlers = {};
SiteTreeHandlers.parentChanged_url = 'admin/ajaxupdateparent';
SiteTreeHandlers.orderChanged_url = 'admin/ajaxupdatesort';
SiteTreeHandlers.loadPage_url = 'admin/getitem';
SiteTreeHandlers.loadTree_url = 'admin/getsubtree';

SiteTreeFilter = Class.create();
SiteTreeFilter.applyTo('#siteTreeFilterList');
SiteTreeFilter.prototype = {
	initialize: function () {
	},
	onchange : function() {
		var value = this.options[this.selectedIndex].value;
		
		if(value != 'all') { 
			$('sitetree').setCustomURL(SiteTreeHandlers.controller_url+'/getfilteredsubtree?filter='+escape(value));
		} else {
			$('sitetree').clearCustomURL();
		}

		// We can't update the tree while it's draggable; it gets b0rked.
		var __makeDraggableAfterUpdate = false;
		if($('sitetree').isDraggable) {
			$('sitetree').stopBeingDraggable();
			__makeDraggableAfterUpdate = true;
		}
	
		var indicator = $('siteTreeFilterActionIndicator');
		indicator.style.display = 'inline';
	
		$('sitetree').reload({
			onSuccess: function() {
				indicator.style.display = 'none';
				if(__makeDraggableAfterUpdate) $('sitetree').makeDraggable();
			},
			onFailure: function(response) {
				errorMessage('Could not update tree', response);
			}
		});
	}
}


/**
 * Batch Actions button click action
 */
batchactionsclass = Class.create();
batchactionsclass.applyTo('#batchactions');
batchactionsclass.prototype = {
	
	initialize : function() {
		Observable.applyTo($(_HANDLER_FORMS.batchactions));
	},
	onclick : function() {
		if(treeactions.toggleSelection(this)) {
			this.multiselectTransform();
		}
		return false;
	},
	
	actionChanged: function() {
		var urlSegment = $('choose_batch_action').value.split('/').pop()
		if ($('BatchActionParameters_'+urlSegment)) {
			jQuery('#actionParams').empty();
			jQuery('#BatchActionParameters_'+urlSegment).appendTo('#actionParams');
			$('actionParams').style.display = 'block';
			$('actionParams').style.padding = '4px';
		} else {
			$('actionParams').innerHTML = '';
			$('actionParams').style.display = 'none';
		}
	},
	
	multiselectTransform : function() {
		batchActionGlobals.o1 = $('sitetree').observeMethod('SelectionChanged', batchActionGlobals.treeSelectionChanged);
		batchActionGlobals.o2 = $(_HANDLER_FORMS.batchactions).observeMethod('Close', batchActionGlobals.popupClosed);
	
		jQuery('#sitetree').addClass('multiselect');

		batchActionGlobals.selectedNodes = { };

		var selectedNode = $('sitetree').firstSelected();
		if(selectedNode && selectedNode.className.indexOf('nodelete') == -1) {
			var selIdx = $('sitetree').getIdxOf(selectedNode);
			batchActionGlobals.selectedNodes[selIdx] = true;
			selectedNode.removeNodeClass('current');
			selectedNode.addNodeClass('selected');	
			selectedNode.open();	
			
			// Open all existing children, which might trigger further
			// ajaxExansion calls to ensure all nodes are selectable
			var children = selectedNode.getElementsByTagName('li');
			for(var i=0; i<children.length; i++) {
				children[i].open();
			}
		}
	}
}

// batchActionGlobals is needed because calls to observeMethod doesn't seem to preserve instance variables so a Prototype can't be used
batchActionGlobals = {
	selectedNodes: { },
	// count Int - The number of nodes selected
	count: { },
	// TODO: Remove 'new-' code http://open.silverstripe.com/ticket/875
	newNodes: { },
	treeSelectionChanged : function(selectedNode) {
		var idx = $('sitetree').getIdxOf(selectedNode);
		if(selectedNode.className.indexOf('nodelete') == -1) {
			if(selectedNode.selected) {
				selectedNode.removeNodeClass('selected');
				selectedNode.selected = false;
				batchActionGlobals.selectedNodes[idx] = false;
	
			} else {
				// Open node in order to allow proper selection of children
				if(Element.hasClassName(selectedNode, 'unexpanded')) {
					selectedNode.open();
				}
				
				// Select node
				selectedNode.addNodeClass('selected');
				selectedNode.selected = true;
				batchActionGlobals.selectedNodes[idx] = true;
				
				// Open all existing children, which might trigger further
				// ajaxExansion calls to ensure all nodes are selectable
				var children = selectedNode.getElementsByTagName('li');
				for(var i=0; i<children.length; i++) {
					children[i].open();
				}
			}
		}
		
		return false;
	},
	
	popupClosed : function() {
		jQuery('#sitetree').removeClass('multiselect');
		$('sitetree').stopObserving(batchActionGlobals.o1);
		$(_HANDLER_FORMS.batchactions).stopObserving(batchActionGlobals.o2);

		for(var idx in batchActionGlobals.selectedNodes) {
			if(batchActionGlobals.selectedNodes[idx]) {
				node = $('sitetree').getTreeNodeByIdx(idx);
				if(node) {
					node.removeNodeClass('selected');
					node.selected = false;
				}
			}
		}
		batchActionGlobals.selectedNodes = { };
	},

	getCsvIds : function() {
		var csvIDs = new Array();
		var st = $('sitetree');
		batchActionGlobals.newNodes = new Array();
		for(var idx in batchActionGlobals.selectedNodes) {
			if(batchActionGlobals.selectedNodes[idx]) {
				
				// Delete/Publish new nodes? (Leftover from delete code?) TODO: Remove 'new-' code http://open.silverstripe.com/ticket/875
				if( idx.match(/^new-[a-z0-9A-Z\-]+$/) ) {
					batchActionGlobals.newNodes.push( idx );
				} else {
					var i, item, childrenTopublish = st.getTreeNodeByIdx(idx).getElementsByTagName('li');
					for(i=0;item=childrenTopublish[i];i++) {
						if(csvIDs.indexOf(st.getIdxOf(childrenTopublish[i])) == -1) {
							csvIDs.push(st.getIdxOf(childrenTopublish[i]));
						}
					}
					if(csvIDs.indexOf(idx) == -1) {
						csvIDs.push(idx);
					}
				}
			}
		}
		batchActionGlobals.count=csvIDs.length;	
		return (csvIDs.toString());
	},
	unfilterSiteTree : function() {
		// Reload the site tree if it has been filtered
		if ($('SiteTreeIsFiltered').value == 1) {
			// Show all items in Site Tree again
			new Ajax.Request( 'admin/SiteTreeAsUL' + '&ajax=1', {
				onSuccess: function( response ) {
					$('sitetree_ul').innerHTML = response.responseText;
					Behaviour.apply($('sitetree_ul'));
					$('SiteTreeIsFiltered').value = 0;
					$('batchactions').multiselectTransform();
					statusMessage(ss.i18n._t('CMSMAIN.SUCCESSUNFILTER'),'good');
				},
				onFailure : function(response) {
					errorMessage(ss.i18n.sprintf(
						ss.i18n._t('CMSMAIN.ERRORUNFILTER'),
						response.responseText
					));
				}
			});
		}
	}
}


Behaviour.register({
	'#choose_batch_action' : {
		onchange : function() {
			$('batchactions').actionChanged();
		}
	}
});



/**
 * Publish selected pages action
 */
publishpage = Class.create();
publishpage.applyTo('#batchactions_options');
publishpage.prototype = {
	onsubmit : function() {
		csvIDs = batchActionGlobals.getCsvIds();
		if(csvIDs) {		
			var optionEl = $('choose_batch_action').options[$('choose_batch_action').selectedIndex];
			var actionText = optionEl.text;
			var optionParams = eval(optionEl.className);
			var ingText = optionParams.doingText;

			// Confirmation
			if(!confirm("You have " + batchActionGlobals.count + " pages selected.\n\nDo your really want to " + actionText.toLowerCase() + "?")) {
				return false;
			}

			this.elements.csvIDs.value = csvIDs;

			// Select form submission URL
			this.action = $('choose_batch_action').value;
			
			// Loading indicator
			statusMessage(ingText);
			$('batchactions_go').className = 'loading';
			
			// Submit form
			Ajax.SubmitForm(this, null, {
				onSuccess :  function(response) {
					Ajax.Evaluator(response);
					$('batchactions_go').className = '';
					treeactions.closeSelection($('batchactions'));
				},
				onFailure : function(response) {
					errorMessage('Error ' + ingText, response);
				}
			});
		} else {
			alert(ss.i18n._t('CMSMAIN.SELECTONEPAGE'));
		}

		return false;
	}
}


/**
 * Delete selected pages action
 */
deletepage = Class.create();
deletepage.applyTo('#Form_DeleteItemsForm');
deletepage.prototype = {
	onsubmit : function() {
		csvIDs = batchActionGlobals.getCsvIds();
		if(csvIDs || batchActionGlobals.newNodes.length > 0) {
			batchActionGlobals.count += batchActionGlobals.newNodes.length;
			
			if(confirm(ss.i18n.sprintf(
				ss.i18n._t('CMSMAIN.REALLYDELETEPAGES'),
				batchActionGlobals.count
			))) {
				this.elements.csvIDs.value = csvIDs;
				
				statusMessage(ss.i18n._t('CMSMAIN.DELETINGPAGES'));
				// TODO: Remove 'new-' code http://open.silverstripe.com/ticket/875	
				for( var idx = 0; idx < batchActionGlobals.newNodes.length; idx++ ) {
					var newNode = $('sitetree').getTreeNodeByIdx( batchActionGlobals.newNodes[idx] );
					
					if( newNode.parentTreeNode )
						newNode.parentTreeNode.removeTreeNode( newNode );
					else
						alert( newNode.id + ' has no parent node');
						
					$('Form_EditForm').reloadIfSetTo(idx);
				}
				
				batchActionGlobals.newNodes = new Array();
				// Put an AJAXY loading icon on the button
				$('Form_DeleteItemsForm_action_deleteitems').className = 'loading';
				Ajax.SubmitForm(this, null, {
					onSuccess : function(response) {
						Ajax.Evaluator(response);
						$('Form_DeleteItemsForm_action_deleteitems').className = '';
						treeactions.closeSelection($('batchactions'));
					},
					onFailure : function(response) {
						errorMessage(ss.i18n._t('CMSMAIN.ERRORDELETINGPAGES'), response);
					}
				});
			}
			
		} else {
			alert(ss.i18n._t('CMSMAIN.SELECTONEPAGE'));
		}

		return false;
	}
}

/**
 * Tree context menu
 */
TreeContextMenu = {
	'Edit this page' : function(treeNode) {
		treeNode.selectTreeNode();
	},
	'Duplicate page and children' : function(treeNode) {
		// First save the page silently (without confirmation) and then duplicate the page.
		jQuery('#Form_EditForm').concrete('ss').ajaxSubmit(null, treeNode.duplicatePageWithChildren.bind(treeNode)); 
	},
	'Duplicate just this page' : function(treeNode) {
		// First save the page silently (without confirmation) and then duplicate the page.
		jQuery('#Form_EditForm').concrete('ss').ajaxSubmit(null, treeNode.duplicatePageWithChildren.bind(treeNode)); 
	},
	'Sort sub-pages' : function(treeNode) {
		var children = treeNode.treeNodeHolder().childTreeNodes();
		var sortedChildren = children.sort(function(a, b) {
			var titleA = a.aTag.innerHTML.replace(/<[^>]*>/g,'');
			var titleB = b.aTag.innerHTML.replace(/<[^>]*>/g,'');
			return titleA < titleB ? -1 : (titleA > titleB ? 1 : 0);
		});
		
		var i,child;
		for(i=0;child=sortedChildren[i];i++) {
			treeNode.appendTreeNode(child);
		}
		
		treeNode.onOrderChanged(sortedChildren,treeNode);
	}
};