(function($) {

	/**
	 * @class Base edit form, provides ajaxified saving
	 * and reloading itself through the ajax return values.
	 * Takes care of resizing tabsets within the layout container.
	 * @name ss.Form_EditForm
	 */
	$('#Form_EditForm').concrete('ss',function($){
		return/** @lends ss.Form_EditForm */{	
	
			/**
			 * @type String HTML text to show when the form has been deleted.
			 */
			RemoveHtml: null,
	
			/**
			 * Suppress submission unless it is handled through ajaxSubmit()
			 */
			onsubmit: function(e) {
				return false;
			},
	
			/**
			 * @param {DOMElement} button The pressed button (optional)
			 */
			ajaxSubmit: function(button) {
				// default to first button if none given - simulates browser behaviour
				if(!button) button = this.find(':submit:first');
		
				var self = this;
		
				this.trigger('ajaxsubmit', {button: button});
		
				// set button to "submitting" state
				$(button).addClass('loading');
		
				// @todo TinyMCE coupling
				if(typeof tinyMCE != 'undefined') tinyMCE.triggerSave();
		
				// validate if required
				if(!this.validate()) {
					// TODO Automatically switch to the tab/position of the first error
					statusMessage("Validation failed.", "bad");

					$(button).removeClass('loading');

					return false;
				}

				// get all data from the form
				var data = this.serializeArray();
				// add button action
				data.push({name: $(button).attr('name'), value:'1'});
				$.post(
					this.attr('action'), 
					data,
					function(response) {
						$(button).removeClass('loading');
				
						self._loadResponse(response);
					}, 
					// @todo Currently all responses are assumed to be evaluated
					'script'
				);
		
				return false;
			},
	
			/**
			 * Hook in (optional) validation routines.
			 * Currently clientside validation is not supported out of the box in the CMS.
			 * 
			 * @todo Placeholder implementation
			 * 
			 * @return {boolean}
			 */
			validate: function() {
				var isValid = true;
				this.trigger('validate', {isValid: isValid});
		
				return isValid;
			},
	
			/**
			 * @param String url
			 * @param Function callback (Optional)
			 */
			load: function(url, callback) {
				var self = this;
				$.get(
					url, 
					function(response) {
						self._loadResponse(response);
						if(callback) callback.apply(self, [response]);
					}, 
					// @todo Currently all responses are assumed to be evaluated
					'script'
				);
			},
	
			/**
			 * Remove everying inside the <form> tag
			 * with a custom HTML fragment. Useful e.g. for deleting a page in the CMS.
			 * 
			 * @param {String} removeText
			 */
			remove: function(removeHTML) {
		
			},
	
			/**
			 * Remove all the currently active TinyMCE editors.
			 * Note: Everything that calls this externally has an inappropriate coupling to TinyMCE.
			 */
			cleanup: function() {
				if((typeof tinymce != 'undefined') && tinymce.EditorManager) {
					var id;
					for(id in tinymce.EditorManager.editors) {
						tinymce.EditorManager.editors[id].remove();
					}
					tinymce.EditorManager.editors = {};
				}
			},
	
			/**
			 * @param {String} result Either HTML for straight insertion, or eval'ed JavaScript.
			 *  If passed as HTML, it is assumed that everying inside the <form> tag is replaced,
			 *  but the old <form> tag itself stays intact.
			 */
			_loadResponse: function(response) {
				this.cleanup();
		
				var html = response;

				// Rewrite # links
				html = html.replace(/(<a[^>]+href *= *")#/g, '$1' + window.location.href.replace(/#.*$/,'') + '#');

				// Rewrite iframe links (for IE)
				html = html.replace(/(<iframe[^>]*src=")([^"]+)("[^>]*>)/g, '$1' + $('base').attr('href') + '$2$3');

				// Prepare iframes for removal, otherwise we get loading bugs
				this.find('iframe').each(function() {
					this.contentWindow.location.href = 'about:blank';
					this.remove();
				});

				this.html(html);

				if(this.hasClass('validationerror')) {
					statusMessage(ss.i18n._t('ModelAdmin.VALIDATIONERROR', 'Validation Error'), 'bad');
				} else {
					statusMessage(ss.i18n._t('ModelAdmin.SAVED', 'Saved'), 'good');
				}

				Behaviour.apply(); // refreshes ComplexTableField
		
				// focus input on first form element
				this.find(':input:visible:first').focus();
		
				this.trigger('loadnewpage', {response: response});
			}
		};
	});

	/**
	 * @class All buttons in the right CMS form go through here by default.
	 * We need this onclick overloading because we can't get to the
	 * clicked button from a form.onsubmit event.
	 * @name ss.Form_EditForm.Actions.submit
	 */
	$('#Form_EditForm .Actions :submit').concrete('ss', function($){
		return/** @lends ss.Form_EditForm.Actions.submit */{
		onclick: function(e) {
			$(this[0].form).ajaxSubmit(this);
			return false;
		}
	}});
}(jQuery));