/*
 * Copyright 2004-2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
dojo.declare("Spring.DefaultEquals", null, {
	equals : function(/*Object*/other){
		if (other.declaredClass && other.declaredClass == this.declaredClass) {
			return true;
		}else{
			return false;
		}
	}			
});

dojo.declare("Spring.ElementDecoration", [Spring.AbstractElementDecoration, Spring.DefaultEquals], {
	constructor : function(config) {
		this.copyFields = new Array('name', 'value', 'type', 'checked', 'selected', 'readOnly', 'disabled', 'alt', 'maxLength');
		dojo.mixin(this, config);
		if(this.widgetModule == "") {
			this.widgetModule = this.widgetType;
		}
	},
	
	apply : function(){
		if (dijit.byId(this.elementId)) {
			dijit.byId(this.elementId).destroyRecursive(false);
		}
		var element = dojo.byId(this.elementId);
		if (!element) {
			console.error("Could not apply " + this.widgetType + " decoration.  Element with id '" + this.elementId + "' not found in the DOM.");
		}
		else {
			for (var copyField in this.copyFields) {
				copyField = this.copyFields[copyField];
				if (!this.widgetAttrs[copyField] && element[copyField] &&
				(typeof element[copyField] != 'number' ||
				(typeof element[copyField] == 'number' && element[copyField] >= 0))) {
					this.widgetAttrs[copyField] = element[copyField];
				}
			}
			dojo.require(this.widgetModule);
			var widgetConstructor = dojo.eval(this.widgetType);
			this.widget = new widgetConstructor(this.widgetAttrs, element);
			this.widget.startup();
		}
   		//return this to support method chaining
   		return this;
	},
	
	validate : function(){
		if (!this.widget.isValid) {
			// some widgets cannot be validated
			return true;
		}
		var isValid = this.widget.isValid(false);
		if (!isValid) {
			this.widget.state = "Error";
			this.widget._setStateClass();
		}
		return isValid;
	}
});

dojo.declare("Spring.ValidateAllDecoration", [Spring.AbstractValidateAllDecoration, Spring.DefaultEquals], {
	constructor : function(config) {
		this.originalHandler = null;
		this.connection = null;
		dojo.mixin(this, config);
	},
	
	apply : function() {
		var element = dojo.byId(this.elementId);
		this.originalHandler = element[this.event];
		var context = this;
		element[this.event] = function(event){
			context.handleEvent(event, context);
		};
		return this;
	},
	
	cleanup : function(){
		dojo.disconnect(this.connection);
	},
	
	handleEvent : function(event, context){
		if (!Spring.validateAll()) {
			dojo.stopEvent(event);
		} else if(dojo.isFunction(context.originalHandler)) {
			var result = context.originalHandler(event);
			if (result == false) {
				dojo.stopEvent(event);
			}
		}
	}
});

dojo.declare("Spring.AjaxEventDecoration", [Spring.AbstractAjaxEventDecoration, Spring.DefaultEquals], {
	constructor : function(config){
		this.connection = null;
		dojo.mixin(this, config);
	},
	
	apply : function() {
		this.connection = dojo.connect(dojo.byId(this.elementId), this.event, this, "submit");
		return this;	
	},
	
	cleanup : function(){
		dojo.disconnect(this.connection);
	},
	
	submit : function(event){
		if (this.sourceId == ""){
			this.sourceId = this.elementId;
		}
		if(this.formId == ""){
			Spring.remoting.getLinkedResource(this.sourceId, this.params, this.popup);
		} else {
			Spring.remoting.submitForm(this.sourceId, this.formId, this.params);
		}
		dojo.stopEvent(event);
	}
});

dojo.declare("Spring.RemotingHandler", Spring.AbstractRemotingHandler, {
	constructor : function(){},
	
	submitForm : function(/*String */ sourceId, /*String*/formId, /*Object*/ params) {
		var content = new Object();
		for (var key in params) {
			content[key] = params[key];
		}
		
		var sourceComponent = dojo.byId(sourceId);
	
	    if (sourceComponent != null){
	    	if(sourceComponent.value != undefined && sourceComponent.type && ("button,submit,reset").indexOf(sourceComponent.type) < 0) {
				content[sourceId] = sourceComponent.value;
			}
			else if(sourceComponent.name != undefined) {
	    		content[sourceComponent.name] = sourceComponent.name;
	    	} else {
	    		content[sourceId] = sourceId;
	    	}
	    }
	    
		if (!content['ajaxSource']) {
			content['ajaxSource'] = sourceId;
		}
	    
		dojo.xhrPost({
			
			content: content,
			
			form: formId,
			
			handleAs: "text",
			
			headers: {"Accept" : "text/html;type=ajax"},
			
			// The LOAD function will be called on a successful response.
	        load: this.handleResponse,
	
	        // The ERROR function will be called in an error case.
	        error: this.handleError
        });	

	},
	
	getLinkedResource: function(/*String */ linkId, /*Object*/params, /*boolean*/ modal) {
		this.getResource(dojo.byId(linkId).href, params, modal);
	},
	
	getResource: function(/*String */ resourceUri, /*Object*/params, /*boolean*/ modal) {
		
		dojo.xhrGet({
			
			url: resourceUri,
			
			content: params,
			
			handleAs: "text",
			
			headers: {"Accept" : "text/html;type=ajax"},
			
			load: this.handleResponse,
			
			error: this.handleError,
			
			modal: modal
		});
	},
	
	handleResponse: function(response, ioArgs) {
		
		//First check if this response should redirect
		var redirectURL = ioArgs.xhr.getResponseHeader('Spring-Redirect-URL');
		var modalViewHeader = ioArgs.xhr.getResponseHeader('Spring-Modal-View');
		var modalView = ((dojo.isString(modalViewHeader) && modalViewHeader.length > 0) || ioArgs.args.modal);
		
		if (dojo.isString(redirectURL) && redirectURL.length > 0) {
			if (modalView) {
				//render a popup with the new URL
				Spring.remoting.renderURLToModalDialog(redirectURL, ioArgs);
				return response;
			}
			else {
				if (redirectURL.indexOf("/") >= 0) {
					window.location = window.location.protocol + "//" + window.location.host + redirectURL;
				} else {
					var location = window.location.protocol + "//" + window.location.host + window.location.pathname;
					var appendIndex = location.lastIndexOf("/");
					location = location.substr(0,appendIndex+1) + redirectURL;
					if (location == window.location) {
						Spring.remoting.getResource(location, ioArgs.args.content, false);
					}
					else {
						window.location = location;
					}
				}
				return response;
			}
		}
		
		//Extract and store all <script> elements from the response
		var scriptPattern = '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)';
		var extractedScriptNodes = [];
		var matchAll = new RegExp(scriptPattern, 'img');
		var matchOne = new RegExp(scriptPattern, 'im');
	
		var scriptNodes = response.match(matchAll);
		if (scriptNodes != null)
		{
			for (var i=0; i<scriptNodes.length; i++)
			{
				var script = (scriptNodes[i].match(matchOne) || ['',''])[1];
				script = script.replace(/<!--/mg,'').replace(/\/\/-->/mg,'');
				extractedScriptNodes.push(script);
			}
		}
		response = response.replace(matchAll, '');

		//Extract the new DOM nodes from the response
		var tempDiv = dojo.doc.createElement("div");
		tempDiv.id="ajaxResponse";
		tempDiv.style.visibility= "hidden";
		document.body.appendChild(tempDiv);
		var tempContainer = new dojo.NodeList(tempDiv);
		var newNodes = tempContainer.addContent(response, "first").query("#ajaxResponse > *").orphan();
		tempContainer.orphan();
	
		//For a modal view, just dump the new nodes into a modal dialog
		if (modalView) {
			Spring.remoting.renderNodeListToModalDialog(newNodes);
		}
		else {
		
			//Insert the new DOM nodes and update the Form's action URL
			newNodes.forEach(function(item){
				if (item.id != null && item.id != "") {
					var target = dojo.byId(item.id);
					if (!target) {
						console.error("An existing DOM elment with id '" + item.id + "' could not be found for replacement.");
					} else {
						target.parentNode.replaceChild(item, target);
					}
				}
			});
		}
		
		//Evaluate any script code
		dojo.forEach(extractedScriptNodes, function(script){
			dojo.eval(script);
		});
		
		return response;
	},
	
	handleError: function(response, ioArgs) {
		console.error("HTTP status code: ", ioArgs.xhr.status);
		return response;
	},
	
	renderURLToModalDialog: function(url, ioArgs) {
		url = url + "&"+dojo.objectToQuery(ioArgs.args.content);
		
		Spring.remoting.getResource(url, {}, true);
	},
	
	renderNodeListToModalDialog: function(nodes) {
		dojo.require("dijit.Dialog");
		
		var dialog = new dijit.Dialog({});
		dialog.setContent(nodes);
		dojo.connect(dialog, "hide", dialog, function(){
			this.destroyRecursive(false);
		});
		dialog.show();
	}
});

dojo.declare("Spring.CommandLinkDecoration", [Spring.AbstractCommandLinkDecoration, Spring.DefaultEquals], {
	constructor : function(config){
		dojo.mixin(this, config);
	},
	
	apply : function(){
		var advisedNode = dojo.byId(this.elementId);
		if (!dojo.hasClass(advisedNode, "progressiveLink")) {
			//Node must be replaced
			var nodeToReplace = new dojo.NodeList(advisedNode);
			nodeToReplace.addContent(this.linkHtml, "after").orphan("*");
			//Get the new node
			advisedNode = dojo.byId(this.elementId);
		}
		advisedNode.submitFormFromLink = this.submitFormFromLink;
		//return this to support method chaining
   		return this;
	},
	
	submitFormFromLink : function(/*String*/ formId, /*String*/ sourceId, /*Array of name,value params*/ params){
		var addedNodes = [];
		var formNode = dojo.byId(formId);
		var linkNode = document.createElement("input");
		linkNode.name = sourceId;
		linkNode.value = "submitted";
		addedNodes.push(linkNode);
		
		dojo.forEach(params, function(param){
			var paramNode = document.createElement("input");
			paramNode.name=param.name;
			paramNode.value=param.value;
			addedNodes.push(paramNode);
		});
		
		dojo.forEach(addedNodes, function(nodeToAdd){
			dojo.addClass(nodeToAdd, "SpringLinkInput");
			dojo.place(nodeToAdd, formNode, "last");
		});		
		
		if ((formNode.onsubmit ? !formNode.onsubmit() : false) || !formNode.submit()) {
			dojo.forEach(addedNodes, function(hiddenNode){
				formNode.removeChild(hiddenNode);
			});
		}
	}
});

dojo.addOnLoad(Spring.initialize);