var FormCheck = new Class({
	
	Implements: [Options, Events],

	options : {
		
		tipsClass: 'fc-tbx',				
		errorClass: 'fc-error',				
		fieldErrorClass: 'fc-field-error',	
		
		submitByAjax : false,				
		ajaxResponseDiv : false,			
		ajaxEvalScripts : false,			
		onAjaxRequest : $empty,				
		onAjaxSuccess : $empty,				
		onAjaxFailure : $empty,				
		
		display : {
			showErrors : 1,
			errorsLocation : 1,
			indicateErrors : 1,
			keepFocusOnError : 0,
			checkValueIfEmpty : 1,
			addClassErrorToField : 0,
			fixPngForIe : 1,
			replaceTipsEffect : 1,
			flashTips : 0,
			closeTipsButton : 1,
			tipsPosition : "right",
			tipsOffsetX : -45,
			tipsOffsetY : 0,
			listErrorsAtTop : false,
			scrollToFirst : true,
			fadeDuration : 300
		},
		
		alerts : {
			required: "This field is required.",
			alpha: "This field accepts alphabetic characters only.",
			alphanum: "This field accepts alphanumeric characters only.",
			nodigit: "No digits are accepted.",
			digit: "Please enter a valid integer.",
			digitltd: "The value must be between %0 and %1",
			number: "Please enter a valid number.",
			email: "Please enter a valid email.",
			phone: "Please enter a valid phone.",
			url: "Please enter a valid url.",
			
			confirm: "This field is different from %0",
			differs: "This value must be different of %0",
			length_str: "The length is incorrect, it must be between %0 and %1",
			length_fix: "The length is incorrect, it must be exactly %0 characters",
			lengthmax: "The length is incorrect, it must be at max %0",
			lengthmin: "The length is incorrect, it must be at least %0",
			checkbox: "Please check the box",
			radios: "Please select a radio",
			select: "Please choose a value"
		},
		
		regexp : {
			required : /[^.*]/,
			alpha : /^[a-z ._-]+$/i,
			alphanum : /^[a-z0-9 ._-]+$/i,
			digit : /^[-+]?[0-9]+$/,
			nodigit : /^[^0-9]+$/,
			number : /^[-+]?\d*\.?\d+$/,
			email : /^[a-z0-9._%-]+@[a-z0-9.-]+\.[a-z]{2,4}$/i,
			phone : /^[\d\s ().-]+$/,
			url : /^(http|https|ftp)\:\/\/[a-z0-9\-\.]+\.[a-z]{2,3}(:[a-z0-9]*)?\/?([a-z0-9\-\._\?\,\'\/\\\+&%\$#\=~])*$/i
		}
	},
	

	initialize : function(form, options) {
		if (this.form = $(form)) {
			this.form.isValid = true;
			this.regex = ['length'];
			this.setOptions(options);
			
			if (typeof(formcheckLanguage) != 'undefined') this.options.alerts = formcheckLanguage;
			
			this.validations = [];
			this.alreadyIndicated = false;
			this.firstError = false;
			
			var regex = new Hash(this.options.regexp);
			regex.each(function(el, key) {
				this.regex.push(key);
			}, this);
	
			this.form.getElements("*[class*=validate]").each(function(el) {
				el.validation = [];
				var classes = el.getProperty("class").split(' ');
				classes.each(function(classX) {
					if(classX.match(/^validate(\[.+\])$/)) {
						var validators = eval(classX.match(/^validate(\[.+\])$/)[1]);
						for(var i = 0; i < validators.length; i++) {
							el.validation.push(validators[i]);
						}
						this.register(el);
					}
				}, this);
			}, this);
			
			this.form.addEvents({
				"submit": this.onSubmit.bind(this)
			});
			
			if(this.options.display.fixPngForIe) this.fixIeStuffs();
			document.addEvent('mousewheel', function(){
				this.isScrolling = false;
			}.bind(this));
		}
	},
	

	register : function(el) {
		this.validations.push(el);
		el.errors = [];
		if (el.validation[0] == 'submit') {
			el.addEvent('click', function(e){
				this.onSubmit(e);
			}.bind(this));
			return true;
		}

		if (this.isChildType(el) == false) el.addEvent('blur', function(e) {
			if((el.element || this.options.display.showErrors == 1) && (this.options.display.checkValueIfEmpty || el.value)) this.manageError(el, 'blur');
		}.bind(this))
		else if (this.isChildType(el) == true) {
			var nlButtonGroup = this.form.getElements('input[name="'+ el.getProperty("name") +'"]');
			nlButtonGroup.each(function(radio){
				radio.addEvent('blur', function(){
					if((el.element || this.options.display.showErrors == 1) && (this.options.display.checkValueIfEmpty || el.value)) this.manageError(el, 'click');
				}.bind(this))
			},this);
		}
	},
	

	validate : function(el) {
		el.errors = [];
		el.isOk = true;
		el.validation.each(function(rule) {
			if(this.isChildType(el)) {
				if (this.validateGroup(el) == false) {
					el.isOk = false;
				}
			} else {
				var ruleArgs = [];
				if(rule.match(/^.+\[/)) {
					var ruleMethod = rule.split('[')[0];
					ruleArgs = eval(rule.match(/^.+(\[.+\])$/)[1].replace(/([A-Z\.]+)/i, "'$1'"));
				} else var ruleMethod = rule;
				
				if (this.regex.contains(ruleMethod) && el.get('tag') != "select") {
					if (this.validateRegex(el, ruleMethod, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				
				if (ruleMethod == 'confirm') {
					if (this.validateConfirm(el, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				if (ruleMethod == 'differs') {
					if (this.validateDiffers(el, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				if (el.get('tag') == "select" || (el.type == "checkbox" && ruleMethod == 'required')) {
					if (this.simpleValidate(el) == false) {
						el.isOk = false;
					}
				}
			}
		}, this);
		
		if (el.isOk) return true;
		else return false;
	},
	

	simpleValidate : function(el) {
		if (el.get('tag') == 'select' && (el.options[el.selectedIndex].text == el.options[0].text)) {
			el.errors.push(this.options.alerts.select);
			return false;
		} else if (el.type == "checkbox" && el.checked == false) {
			el.errors.push(this.options.alerts.checkbox);
			return false;
		}
		return true;
	},
	

	validateRegex : function(el, ruleMethod, ruleArgs) {
		var msg = "";
		if (ruleArgs[1] && ruleMethod == 'length') {
			if (ruleArgs[1] == -1) {
				this.options.regexp.length = new RegExp("^[\\s\\S]{"+ ruleArgs[0] +",}$");
				msg = this.options.alerts.lengthmin.replace("%0",ruleArgs[0]);
			} else if(ruleArgs[0] == ruleArgs[1]) {
				this.options.regexp.length = new RegExp("^[\\s\\S]{"+ ruleArgs[0] +"}$");
				msg = this.options.alerts.length_fix.replace("%0",ruleArgs[0]);
			} else {
				this.options.regexp.length = new RegExp("^[\\s\\S]{"+ ruleArgs[0] +","+ ruleArgs[1] +"}$");
				msg = this.options.alerts.length_str.replace("%0",ruleArgs[0]).replace("%1",ruleArgs[1]);
			}
		} else if (ruleArgs[0] && ruleMethod == 'length') {
			this.options.regexp.length = new RegExp("^.{0,"+ ruleArgs[0] +"}$");
			msg = this.options.alerts.lengthmax.replace("%0",ruleArgs[0]);
		} else {
			msg = this.options.alerts[ruleMethod];
		}
		if (ruleArgs[1] && ruleMethod == 'digit') {
			var regres = true;
			if (!this.options.regexp.digit.test(el.value)) {
				el.errors.push(this.options.alerts[ruleMethod]);
				regres = false;
			}
			if (ruleArgs[1] == -1) {
				if (el.value >= ruleArgs[0]) var valueres = true; else var valueres = false;
				msg = this.options.alerts.digitmin.replace("%0",ruleArgs[0]);
			} else {
				if (el.value >= ruleArgs[0] && el.value <= ruleArgs[1]) var valueres = true; else var valueres = false;
				msg = this.options.alerts.digitltd.replace("%0",ruleArgs[0]).replace("%1",ruleArgs[1]);
			}
			if (regres == false || valueres == false) {
				el.errors.push(msg);
				return false;
			}
		} else if (this.options.regexp[ruleMethod].test(el.value) == false)  {
			el.errors.push(msg);
			return false;
		}
		return true;
	},


	validateConfirm: function(el,ruleArgs) {
		if (el.validation.contains('required') == false) {
			el.validation.push('required');
		}
		var confirm = ruleArgs[0];
		if(el.value != this.form[confirm].value){
			msg = this.options.alerts.confirm.replace("%0",ruleArgs[0]);
			el.errors.push(msg);
			return false;
		}
		return true;
	},
	

	validateDiffers: function(el,ruleArgs) {
		var confirm = ruleArgs[0];
		if(el.value == this.form[confirm].value){
			msg = this.options.alerts.differs.replace("%0",ruleArgs[0]);
			el.errors.push(msg);
			return false;
		}
		return true;
	},
	

	isChildType: function(el) {
		var elType = el.type.toLowerCase();
		if((elType == "radio")) return true;
		return false;
	},
	

	validateGroup : function(el) {
		el.errors = [];
		var nlButtonGroup = this.form[el.getProperty("name")];
		el.group = nlButtonGroup;
		var cbCheckeds = false;
		
		for(var i = 0; i < nlButtonGroup.length; i++) {
			if(nlButtonGroup[i].checked) {
				cbCheckeds = true;
			}
		}
		if(cbCheckeds == false) {
			el.errors.push(this.options.alerts.radios);
			return false;
		} else {
			return true;	
		}
	},
	

	listErrorsAtTop : function(obj) {
		if(!this.form.element) {
			 this.form.element = new Element('div', {'id' : 'errorlist', 'class' : this.options.errorClass}).injectTop(this.form);
		}
		if ($type(obj) == 'collection') {
			new Element('p').set('html',"<span>" + obj[0].name + " : </span>" + obj[0].errors[0]).injectInside(this.form.element);
		} else {
			if ((obj.validation.contains('required') && obj.errors.length > 0) || (obj.errors.length > 0 && obj.value && obj.validation.contains('required') == false)) {
				obj.errors.each(function(error) {
					new Element('p').set('html',"<span>" + obj.name + " : </span>" + error).injectInside(this.form.element);
				}, this);
			}
		}
	},
	

	manageError : function(el, method) {
		var isValid = this.validate(el);
		if ((!isValid && el.validation.contains('required')) || (!el.validation.contains('required') && el.value && !isValid)) {
			if(this.options.display.listErrorsAtTop == true && method == 'submit')
				this.listErrorsAtTop(el, method);
			if (this.options.display.indicateErrors == 2 ||this.alreadyIndicated == false || el.name == this.alreadyIndicated.name)
			{
				if(!this.firstError) this.firstError = el;
				this.alreadyIndicated = el;
				if (this.options.display.keepFocusOnError && el.name == this.firstError.name) (function(){el.focus()}).delay(20);
				this.addError(el);
				return false;
			}
		} else if ((isValid || (!el.validation.contains('required') && !el.value)) && el.element) {
			this.removeError(el);
			return true;
		}
		return true;
	},
	

	addError : function(obj) {
		if(!obj.element && this.options.display.indicateErrors != 0) {
			if (this.options.display.errorsLocation == 1) {
				var pos = (this.options.display.tipsPosition == 'left') ? obj.getCoordinates().left : obj.getCoordinates().right;
				var options = {
					'opacity' : 0,
					'position' : 'absolute',
					'float' : 'left',
					'left' : pos + this.options.display.tipsOffsetX
				}
				obj.element = new Element('div', {'class' : this.options.tipsClass, 'styles' : options}).injectInside(document.body);
				this.addPositionEvent(obj);
			} else if (this.options.display.errorsLocation == 2){
				obj.element = new Element('div', {'class' : this.options.errorClass, 'styles' : {'opacity' : 0}}).injectBefore(obj);
			} else if (this.options.display.errorsLocation == 3){
				obj.element = new Element('div', {'class' : this.options.errorClass, 'styles' : {'opacity' : 0}});
				if ($type(obj.group) == 'object' || $type(obj.group) == 'collection')
					obj.element.injectAfter(obj.group[obj.group.length-1]);
				else
					obj.element.injectAfter(obj);
			}
		}					
		if (obj.element) {
			obj.element.empty();
			if (this.options.display.errorsLocation == 1) {
				var errors = [];
				obj.errors.each(function(error) {
					errors.push(new Element('p').set('html', error));
				});
				var tips = this.makeTips(errors).injectInside(obj.element);
				if(this.options.display.closeTipsButton) {
					tips.getElements('a.close').addEvent('mouseup', function(){
						this.removeError(obj);
					}.bind(this));
				}
				obj.element.setStyle('top', obj.getCoordinates().top - tips.getCoordinates().height + this.options.display.tipsOffsetY);
			} else {
				obj.errors.each(function(error) {
					new Element('p').set('html',error).injectInside(obj.element);
				});
			}
			
			if (!Browser.Engine.trident5 && obj.element.getStyle('opacity') == 0)
				new Fx.Morph(obj.element, {'duration' : this.options.display.fadeDuration}).start({'opacity':[1]});
			else
				obj.element.setStyle('opacity', 1);
		}
		if (this.options.display.addClassErrorToField && this.isChildType(obj) == false)
		{
			obj.addClass(this.options.fieldErrorClass);
		}
	},
	

	addPositionEvent : function(obj) {
		if(this.options.display.replaceTipsEffect) {
			obj.event = function(){
				new Fx.Morph(obj.element, {
					'duration' : this.options.display.fadeDuration
				}).start({ 
					'left':[obj.element.getStyle('left'), obj.getCoordinates().right + this.options.display.tipsOffsetX],
					'top':[obj.element.getStyle('top'), obj.getCoordinates().top - obj.element.getCoordinates().height + this.options.display.tipsOffsetY]
				});
			}.bind(this);
			
		} else {
			obj.event = function(){
				obj.element.setStyles({ 
					'left':obj.getCoordinates().right + this.options.display.tipsOffsetX,
					'top':obj.getCoordinates().top - obj.element.getCoordinates().height + this.options.display.tipsOffsetY
				});
			}.bind(this)
		}
		window.addEvent('resize', obj.event);
	},
	

	removeError : function(obj) {
		this.firstError = false;
		this.alreadyIndicated = false;
		obj.errors = [];
		obj.isOK = true;
		window.removeEvent('resize', obj.event);
		if (this.options.display.errorsLocation == 2)
			new Fx.Morph(obj.element, {'duration' : this.options.display.fadeDuration}).start({ 'height':[0] });
		if (!Browser.Engine.trident5) {
			new Fx.Morph(obj.element, {
				'duration' : this.options.display.fadeDuration,
				'onComplete' : function() {
					if (obj.element) {
						obj.element.destroy();
						obj.element = false;
					}
				}.bind(this)
			}).start({ 'opacity':[1,0] });
		} else {
			obj.element.destroy();
			obj.element = false;
		}
		
		if (this.options.display.addClassErrorToField && !this.isChildType(obj))
		{
			obj.removeClass(this.options.fieldErrorClass);
		}
	},
	

	focusOnError : function (obj) {
		if (this.options.display.scrollToFirst && !this.alreadyFocused && !this.isScrolling) {
			if (this.alreadyIndicated.element) {
				switch (this.options.display.errorsLocation){
					case 1 : 
						var dest = obj.element.getCoordinates().top;
						break;
					case 2 :
						var dest = obj.element.getCoordinates().top-30;
						break;
					case 3 :
						var dest = obj.getCoordinates().top-30;
						break;
				}
				this.isScrolling = true;
			} else if (!this.options.display.indicateErrors) {
				var dest = obj.getCoordinates().top-30;
			}
			if (window.getScroll.y != dest) {
				new Fx.Scroll(window, {
					onComplete : function() {
						this.isScrolling = false;
						obj.focus();
					}.bind(this)
				}).start(0,dest);
			} else {
				this.isScrolling = false;
				obj.focus();
			}
			this.alreadyFocused = true;
		}
	},
	

	fixIeStuffs : function () {
		if (Browser.Engine.trident4) {
			var rpng = new RegExp('url\\(([\.a-zA-Z0-9_/:-]+\.png)\\)');
			var search = new RegExp('(.+)formcheck\.css');
			for (var i = 0; i < document.styleSheets.length; i++){
				if (document.styleSheets[i].href.match(/formcheck\.css$/)) {
					var root = document.styleSheets[i].href.replace(search, '$1');
					var count = document.styleSheets[i].rules.length;
					for (var j = 0; j < count; j++){
						var cssstyle = document.styleSheets[i].rules[j].style;
						var bgimage = root + cssstyle.backgroundImage.replace(rpng, '$1');
						if (bgimage && bgimage.match(/\.png/i)){
							var scale = (cssstyle.backgroundRepeat == 'no-repeat') ? 'crop' : 'scale';
							cssstyle.filter =  'progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, src=\'' + bgimage + '\', sizingMethod=\''+ scale +'\')';
							cssstyle.backgroundImage = "none";
						}
					}
				}
			}
		}
	},
	

	makeTips : function(txt) {
		var table = new Element('table');
			table.cellPadding ='0';
			table.cellSpacing ='0';
			table.border ='0';
			
			var tbody = new Element('tbody').injectInside(table);
				var tr1 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'tl'}).injectInside(tr1);
					new Element('td', {'class' : 't'}).injectInside(tr1);
					new Element('td', {'class' : 'tr'}).injectInside(tr1);
				var tr2 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'l'}).injectInside(tr2);
					var cont = new Element('td', {'class' : 'c'}).injectInside(tr2);
						var errors = new Element('div', {'class' : 'err'}).injectInside(cont);
						txt.each(function(error) {
							error.injectInside(errors);
						});
						if (this.options.display.closeTipsButton) new Element('a',{'class' : 'close'}).injectInside(cont);
					new Element('td', {'class' : 'r'}).injectInside(tr2);
				var tr3 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'bl'}).injectInside(tr3);
					new Element('td', {'class' : 'b'}).injectInside(tr3);
					new Element('td', {'class' : 'br'}).injectInside(tr3);			
		return table;
	},
	

	reinitialize: function() {
		this.validations.each(function(el) {
			if (el.element) {
				el.errors = [];
				el.isOK = true;
				if(this.options.display.flashTips == 1) {
					el.element.destroy();
					el.element = false;
				}
			}
		}, this);
		if (this.form.element) this.form.element.empty();
		this.alreadyFocused = false;
		this.firstError = false;
		this.alreadyIndicated = false;
		this.form.isValid = true;
	},
	

	
	submitByAjax: function() {
		var url = this.form.getProperty('action');
		this.fireEvent('ajaxRequest');
		new Request({
			url: url,
			method: this.form.getProperty('method'),
			data : this.form.toQueryString(),
			evalScripts: this.options.ajaxEvalScripts,
			onFailure: function(instance){
				this.fireEvent('ajaxFailure', instance);
			}.bind(this),
			onSuccess: function(result){
				this.fireEvent('ajaxSuccess', result);
				if(this.options.ajaxResponseDiv) $(this.options.ajaxResponseDiv).set('html',result);
			}.bind(this)
		}).send();
	},
	
	submit: function(){
		var frm = $('frmSmt');
		if(frm){
			$('frmSmt').disabled = true;
			$('frmSmt').innerHTML = '<span>Please wait...</span>';
		}
		this.form.submit();
	},

	

	onSubmit: function(event) {
		new Event(event).stop();
		this.reinitialize();

		this.validations.each(function(el) {
			if(!this.manageError(el,'submit')) this.form.isValid = false;
		}, this);
		
		(this.form.isValid) ? (this.options.submitByAjax) ? this.submitByAjax() : this.submit() : this.focusOnError(this.firstError);
	}
});