/**************************************************************

	Script		: Validate
	Version		: 2.1
	Authors		: Samuel Birch
	Desc		: Form validation
	Licence		: Open Source MIT Licence

**************************************************************/

var Validate = new Class({
	
	getOptions: function(){
		return {
			validateOnBlur: true,
			errorClass: 'error',
			errorMsgClass: 'errorMessage',
			dateFormat: 'dd/MM/yy',
			onFail: Class.empty,
			onSuccess: false,
			showErrorsInline: true,
			label: 'Please wait...'
		};
	},

	initialize: function(form, options){
		this.startPagination();
		this.setOptions(this.getOptions(), options);
		
		this.form = $(form);
		this.elements = this.form.getElements('.required');
		this.hidden = this.form.getElements('.hide');
		
		this.hidden.each(function(el,i) {
			el.setStyle('display', 'none');
		});
		
		this.list = [];
		
		this.elements.each(function(el,i){
			if(this.options.validateOnBlur){
				el.addEvent('blur', this.validate.bind(this, el));
			}
			
			if(el.get('tag') == "select" && el.getParent().getNext().hasClass('hide')) {
				el.addEvent('change', function() {
					if(el.value == 'Yes') {
						el.getParent().getNext().setStyle('display', 'block');
					}else {
						el.getParent().getNext().setStyle('display', 'none');
					}
				});
			}
		}.bind(this));
		
		/*this.form.addEvent('submit', function(e){
			var event = new Event(e);
			var doSubmit = true;
			this.elements.each(function(el,i){
				if(! this.validate(el)){
					event.stop();
					doSubmit = false;
					this.list.include(el);
				}else{
					this.list.remove(el);
				}
			}.bind(this));
			
			if(doSubmit){
				if(this.options.onSuccess){
					event.stop();
					this.options.onSuccess(this.form);
				}else{
					this.form.getElement('input[type=submit]').setProperty('value',this.options.label);
				}
			}else{
				this.options.onFail(this.getList());
			}
			
		}.bind(this));*/
		
	},
	
	getList: function(){
		var list = new Element('ul');
		this.list.each(function(el,i){
			if(el.title != ''){
				var li = new Element('li').injectInside(list);
				new Element('label').setProperty('for', el.id).setText(el.title).injectInside(li);
			}
		});
		return list;
	},
	
	validate: function(el){
		var valid = true;
		this.clearMsg(el);
		
		switch(el.type){
			case 'text':
			case 'textarea':
			case 'select-one':
				if(el.value != ''){
							
					if(el.hasClass('email')){
						var regEmail = /^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/;
						if(el.value.toUpperCase().match(regEmail)){
							valid = true;
						}else{
							valid = false;
							this.setMsg(el, 'Please enter a valid email address');
						}
					}
					
					if(el.hasClass('number')){
						var regNum = /[-+]?[0-9]*\.?[0-9]+/;
						if(el.value.match(regNum)){
							valid = true;
						}else{
							valid = false;
							this.setMsg(el, 'Please enter a valid number');
						}
					}
					
					if(el.hasClass('postcode')){
						var regPC = /^([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9]?[A-Za-z])))) [0-9][A-Za-z]{2})$/
						if(el.value.match(regPC)){
							valid = true;
						}else{
							valid = false;
							this.setMsg(el, 'Please enter a valid postcode');
						}
					}
					
					if(el.hasClass('date')){
						var d = Date.parseExact(el.value, this.options.dateFormat);
						if(d != null){
							valid = true;
						}else{
							valid = false;
							this.setMsg(el, 'Please enter a valid date in the format: '+this.options.dateFormat.toLowerCase());
						}
					}
					
				}else{
					valid = false;
					this.setMsg(el);
				}
				break;
				
			case 'checkbox':
				if(!el.checked){
					valid = false;
					this.setMsg(el);
				}else{
					valid = true;
				}
				break;
				
			case 'radio':
				var rad = $A(this.form[el.name]);
				var ok = false;
				rad.each(function(e,i){
					if(e.checked){
						ok = true;
					}
				});
				if(!ok){
					valid = false;
					this.setMsg(rad.getLast(), 'Please select an option');
				}else{
					valid = true;
					this.clearMsg(rad.getLast());
				}
				break;
				
		}
		return valid;
	},
	
	setMsg: function(el, msg){
		if(msg == undefined){
			msg = el.title;
		}
		if(this.options.showErrorsInline){
			if(el.error == undefined){
				//el.error = new Element('span').addClass(this.options.errorMsgClass).setText(msg).injectBefore(el);
				el.error = new Element('span', {
					'class': this.options.errorMsgClass,
					'html': msg
				});
				el.getParent().grab(el.error, 'top');
			}else{
				el.error.setText(msg);
			}
			el.addClass(this.options.errorClass);
		}
	},
	
	clearMsg: function(el){
		el.removeClass(this.options.errorClass);
		if(el.error != undefined){
			el.error.dispose();
			el.error = undefined;
		}
	},
	
	startPagination: function() {
		var page = 0;
		
		$$('fieldset').each(function(fieldset,page) {
			page++;
			fieldset.setStyle('position', 'absolute');
			fieldset.setStyle('top', '20px');

			var nextAnchor = new Element('a', {
				'href': '#',
				'class': 'nextBtn',
				'html': 'Next'
			});
			
			nextAnchor.addEvent('click', function() {
				var allowNext = true;
				elements = fieldset.getElements('.required');
				elements.each(function(el){
					if(! this.validate(el)){
						allowNext = false;
					}
				}.bind(this));
				if(allowNext) {
					this.fadePage(page, 'out');					
					this.fadePage(page+1, 'in');
				}
				return false;
			}.bind(this));
			
			var backAnchor = new Element('a', {
				'href': '#',
				'class': 'backBtn',
				'html': 'Back'
			});
			
			backAnchor.addEvent('click', function() {
				this.fadePage(page, 'out');				
				this.fadePage(page-1, 'in');
				return false;
			}.bind(this));
			
			$$('input[type=submit]').each(function(input) {
				input.addEvent('click', function() {
					var allowNext = true;
					elements = fieldset.getElements('.required');
					
					elements.each(function(el){
						if(! this.validate(el)){
							allowNext = false;
						}
					}.bind(this));
					
					if(allowNext) {
						return true;
					}
					return false;
					
				}.bind(this));
			}.bind(this));

			fieldset.addClass('page'+page);
			if (page != 1) {
				fieldset.adopt(backAnchor);
				fieldset.fade('hide');
				fieldset.setStyle('height', '20px');
				//fieldset.setStyle('display', 'none');
			}
			if (page != $$('fieldset').length) {
				fieldset.adopt(nextAnchor);
			}
			if (page == 1) {
				//var newHeight = fieldset.getSize();
				//fieldset.getParent.setStyle('height', newHeight.y);
			}
		}, this);
	},

	fadePage: function(num, type) {
		window.scrollTo(0,0);
		$$('.page'+num).each(function(el) {
			if (type == 'in') {
				el.setStyle('height', 'auto');
			}
			el.fade(type).addEvent('onComplete', function() {
				if (type == 'out') {
					el.setStyle('height', '20px');
				}
			});
		});
	}
	
});

Validate.implement(new Options);
Validate.implement(new Events);


/*************************************************************/