/*
 * Created by Crative Core s.r.l. 
 * www.creativecore.it
 *
 */

var Forms = {
	
	init:function(){
		$$('form').addEvent('submit',function(ev){
			ev = new Event(ev);
			var valid = Forms.validateForm(this.id)
			if(!valid) ev.preventDefault();
			
			if($(this).hasClass('ajax') && valid){
				ev.preventDefault();
				
			} 
		});		
	},

	initForm:function(el){
		$(el).addEvent('submit',function(ev){
			ev = new Event(ev);
			if(!Forms.validateForm(this.id)) ev.preventDefault();
		});		
	},

 	isValidDate:function(dateStr, format){
		if (format == null) { format = "MDY"; }
   		format = format.toUpperCase();
   		if (format.length != 3) { format = "MDY"; }
   		if ( (format.indexOf("M") == -1) || (format.indexOf("D") == -1) || (format.indexOf("Y") == -1) ) { format = "MDY"; }
   		if (format.substring(0, 1) == "Y") { // If the year is first
      		var reg1 = /^\d{2}(\-|\/|\.)\d{1,2}\1\d{1,2}$/
      		var reg2 = /^\d{4}(\-|\/|\.)\d{1,2}\1\d{1,2}$/
   		}else if (format.substring(1, 2) == "Y") { // If the year is second
      		var reg1 = /^\d{1,2}(\-|\/|\.)\d{2}\1\d{1,2}$/
      		var reg2 = /^\d{1,2}(\-|\/|\.)\d{4}\1\d{1,2}$/
   		}else{ // The year must be third
      		var reg1 = /^\d{1,2}(\-|\/|\.)\d{1,2}\1\d{2}$/
      		var reg2 = /^\d{1,2}(\-|\/|\.)\d{1,2}\1\d{4}$/
   		}
   		// If it doesn't conform to the right format (with either a 2 digit year or 4 digit year), fail
   		if ( (reg1.test(dateStr) == false) && (reg2.test(dateStr) == false) ) { return false; }
   		var parts = dateStr.split(RegExp.$1); // Split into 3 parts based on what the divider was
   		// Check to see if the 3 parts end up making a valid date
   		if (format.substring(0, 1) == "M") { var mm = parts[0]; } else _
    	if (format.substring(1, 2) == "M") { var mm = parts[1]; } else { var mm = parts[2]; }
   		if (format.substring(0, 1) == "D") { var dd = parts[0]; } else _
    	if (format.substring(1, 2) == "D") { var dd = parts[1]; } else { var dd = parts[2]; }
   		if (format.substring(0, 1) == "Y") { var yy = parts[0]; } else _
    	if (format.substring(1, 2) == "Y") { var yy = parts[1]; } else { var yy = parts[2]; }
   		if (parseFloat(yy) <= 50) { yy = (parseFloat(yy) + 2000).toString(); }
   		if (parseFloat(yy) <= 99) { yy = (parseFloat(yy) + 1900).toString(); }
   		var dt = new Date(parseFloat(yy), parseFloat(mm)-1, parseFloat(dd), 0, 0, 0, 0);
   		if (parseFloat(dd) != dt.getDate()) { return false; }
   		if (parseFloat(mm)-1 != dt.getMonth()) { return false; }
   		return true;
	},

	isNumeric: function (value){
		objRegExp  =  /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/;
		return objRegExp.test(value);
	},

	checkSelect: function(obj){
		if(obj.options[obj.selectedIndex].value == '0' || obj.options[obj.selectedIndex].value == '') return false;
		return true;
	},
	
	checkMail: function(obj){
		var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		return filter.test(obj.value);
	},
	
	checkRadio: function(obj){
		var radios = document.getElementsByName(obj.name);
		var checked = false;
		for(var i =0; i<radios.length;i++){			
			var radio = $(radios[i]);
			if(radio.hasClass('req') && !radio.checked) return false;
			if(radio.checked) checked = true;
		}
		return checked;
	},
	
	checkSize: function (obj){
		var checked=false;
		var value='';
		value=obj.value;
		if (value.length == obj.getAttribute('MAXLENGTH'))
			checked=true;
		return checked; 
	},

	checkField:function(obj){
		var tag = obj.tagName.toLowerCase();
		if(obj.disabled) return true;		
		if(tag == 'fieldset') return true;
		else if(tag == 'select') return Forms.checkSelect(obj);
		var value  = obj.value.trim();		
		if(/radio|checkbox/.test(obj.type)){
			return Forms.checkRadio(obj);
		}else if(!(/button|reset|submit/.test(obj.type))){
			var empty = (value == '')
			var required = obj.hasClass('required');
			if(required && empty) return false;			
			if(obj.hasClass('date') && !empty) return Forms.isValidDate(obj.value,"DMY");
			if(obj.hasClass('numeric') && !empty) return Forms.isNumeric(obj.value);
			if(obj.hasClass('email') && !empty) return Forms.checkMail(obj);
			if(obj.hasClass('regex') && !empty) return obj.value.test(obj.regex);
			if(obj.hasClass('size')) return Forms.checkSize(obj);
		}
		return true;
	},

	validateForm:function(el){
		var form = $(el);
		var result = Forms.validate(form.elements);
		form.fireEvent('afterValidation',result);
		return result;
	},
	
	validateFieldset:function(fieldset){
		var fields = fieldset.getElements('input');
		fields.extend(fieldset.getElements('textarea'));
		fields.extend(fieldset.getElements('select'));
		return Forms.validate(fields);
	},
	
	validate:function(fields){
		var error = false;		
		for(var i=0;i<fields.length;i++){
			var field = $(fields[i]);
			if(!Forms.checkField(field) && !(/button|reset|submit/.test(field.type))){
				error = true;				
				if(!(/radio|checkbox/.test(field.type))){
					field.addClass('error');
					field.addEvent('blur',function(ev){
						ev = new Event(ev);
						if(Forms.checkField(this)){
							this.removeEvent('blur');
							this.removeClass('error');
					}
					});
				}else{
					var label = field.getParent();
					if(label.tagName.toLowerCase() == 'label') label.addClass('error');
				}
			}else{
				if(!(/radio|checkbox/.test(field.type))){
					removeEvent('blur');
					field.removeClass('error');
				}else{
					field.getParent().removeClass('error');
				}
			}
		}
		
		var msgerror = $('errormsg');
		if($chk(msgerror)) msgerror.remove();
		if(error){
			msgerror = new Element('div').setProperty('id','errormsg').injectBefore(fields[fields.length-1].form);
			msgerror.setHTML('<strong>Attenzione:</strong> I campi evidenziati non sono stati compilati correttamente!');
		}

		return !error;		
	}	
}
	
window.addEvent('domready',function(){
	Forms.init();
});