var Validator = Class.create();

Validator.prototype = {
        initialize : function(className, error, test, options) {
                if(typeof test == 'function'){
                        this.options = $H(options);
                        this._test = test;
                } else {
                        this.options = $H(test);
                        this._test = function(){return true};
                }
                this.error = error || 'Validation failed.';
                this.className = className;
        },
        test : function(v, elm) {
                return (this._test(v,elm) && this.options.all(function(p){
                        return Validator.methods[p.key] ? Validator.methods[p.key](v,elm,p.value) : true;
                }));
        }
}
Validator.methods = {
        pattern : function(v,elm,opt) {return Validation.get('IsEmpty').test(v) || opt.test(v)},
        minLength : function(v,elm,opt) {return v.length >= opt},
        maxLength : function(v,elm,opt) {return v.length <= opt},
        min : function(v,elm,opt) {return v >= parseFloat(opt)},
        max : function(v,elm,opt) {return v <= parseFloat(opt)},
        notOneOf : function(v,elm,opt) {return $A(opt).all(function(value) {
                return v != value;
        })},
        oneOf : function(v,elm,opt) {return $A(opt).any(function(value) {
                return v == value;
        })},
        is : function(v,elm,opt) {return v == opt},
        isNot : function(v,elm,opt) {return v != opt},
        equalToField : function(v,elm,opt) {return v == $F(opt)},
        notEqualToField : function(v,elm,opt) {return v != $F(opt)},
        include : function(v,elm,opt) {return $A(opt).all(function(value) {
                return Validation.get(value).test(v,elm);
        })}
}

var Validation = Class.create();

Validation.prototype = {
        initialize : function(form, options){
                this.options = Object.extend({
                        onSubmit : true,
                        stopOnFirst : false,
                        immediate : false,
                        focusOnError : true,
                        useTitles : false,
                        onFormValidate : function(result, form) {},
                        onElementValidate : function(result, elm) {}
                }, options || {});
                this.form = $(form);
                if(this.options.onSubmit) Event.observe(this.form,'submit',this.onSubmit.bind(this),false);
                if(this.options.immediate) {
                        var useTitles = this.options.useTitles;
                        var callback = this.options.onElementValidate;
                        Form.getElements(this.form).each(function(input) { // Thanks Mike!
                                Event.observe(input, 'blur', function(ev) { Validation.validate(Event.element(ev),{useTitle : useTitles, onElementValidate : callback}); });
                        });
                }
        },
        onSubmit :  function(ev){
                if(!this.validate()) Event.stop(ev);
        },
        validate : function() {
                var result = false;
                var useTitles = this.options.useTitles;
                var callback = this.options.onElementValidate;
                if(this.options.stopOnFirst) {
                        result = Form.getElements(this.form).all(function(elm) { return Validation.validate(elm,{useTitle : useTitles, onElementValidate : callback}); });
                } else {
                        result = Form.getElements(this.form).collect(function(elm) { return Validation.validate(elm,{useTitle : useTitles, onElementValidate : callback}); }).all();
                }
                if(!result && this.options.focusOnError) {
                        Form.getElements(this.form).findAll(function(elm){return $(elm).hasClassName('validation-failed')}).first().focus()
                }
                this.options.onFormValidate(result, this.form);
                return result;
        },
        reset : function() {
                Form.getElements(this.form).each(Validation.reset);
        }
}

Object.extend(Validation, {
        validate : function(elm, options){
                options = Object.extend({
                        useTitle : false,
                        onElementValidate : function(result, elm) {}
                }, options || {});
                elm = $(elm);
                var cn = elm.classNames();
                return result = cn.all(function(value) {
                        var test = Validation.test(value,elm,options.useTitle);
                        options.onElementValidate(test, elm);
                        return test;
                });
        },
        test : function(name, elm, useTitle) {
                var v = Validation.get(name);
                var prop = '__advice'+name.camelize();
                try {
                if(Validation.isVisible(elm) && !v.test($F(elm), elm)) {
                        if(!elm[prop]) {
                                var advice = Validation.getAdvice(name, elm);
                                if(advice == null) {
                                        var errorMsg = useTitle ? ((elm && elm.title) ? elm.title : v.error) : v.error;
                                        advice = '<div class="validation-advice" id="advice-' + name + '-' + Validation.getElmID(elm) +'" style="display:none">' + errorMsg + '</div>'
                                        switch (elm.type.toLowerCase()) {
                                                case 'checkbox':
                                                case 'radio':
                                                        var p = elm.parentNode;
                                                        if(p) {
                                                                new Insertion.Bottom(p, advice);
                                                        } else {
                                                                new Insertion.After(elm, advice);
                                                        }
                                                        break;
                                                default:
                                                        new Insertion.After(elm, advice);
                                    }
                                        advice = Validation.getAdvice(name, elm);
                                }
                                if(typeof Effect == 'undefined') {
                                        advice.style.display = 'block';
                                } else {
                                        new Effect.Appear(advice, {duration : 1 });
                                }
                        }
                        elm[prop] = true;
                        elm.removeClassName('validation-passed');
                        elm.addClassName('validation-failed');
                        return false;
                } else {
                        var advice = Validation.getAdvice(name, elm);
                        if(advice != null) advice.hide();
                        elm[prop] = '';
                        elm.removeClassName('validation-failed');
                        elm.addClassName('validation-passed');
                        return true;
                }
                } catch(e) {
                        throw(e)
                }
        },
        isVisible : function(elm) {
                while(elm.tagName != 'BODY') {
                        if(!$(elm).visible()) return false;
                        elm = elm.parentNode;
                }
                return true;
        },
        getAdvice : function(name, elm) {
                return $('advice-' + name + '-' + Validation.getElmID(elm)) || $('advice-' + Validation.getElmID(elm));
        },
        getElmID : function(elm) {
                return elm.id ? elm.id : elm.name;
        },
        reset : function(elm) {
                elm = $(elm);
                var cn = elm.classNames();
                cn.each(function(value) {
                        var prop = '__advice'+value.camelize();
                        if(elm[prop]) {
                                var advice = Validation.getAdvice(value, elm);
                                advice.hide();
                                elm[prop] = '';
                        }
                        elm.removeClassName('validation-failed');
                        elm.removeClassName('validation-passed');
                });
        },
        add : function(className, error, test, options) {
                var nv = {};
                nv[className] = new Validator(className, error, test, options);
                Object.extend(Validation.methods, nv);
        },
        addAllThese : function(validators) {
                var nv = {};
                $A(validators).each(function(value) {
                                nv[value[0]] = new Validator(value[0], value[1], value[2], (value.length > 3 ? value[3] : {}));
                        });
                Object.extend(Validation.methods, nv);
        },
        get : function(name) {
                return  Validation.methods[name] ? Validation.methods[name] : Validation.methods['_LikeNoIDIEverSaw_'];
        },
        methods : {
                '_LikeNoIDIEverSaw_' : new Validator('_LikeNoIDIEverSaw_','',{})
        }
});

Validation.add('IsEmpty', '', function(v) {
                                return  ((v == null) || (v.length == 0)); // || /^\s+$/.test(v));
                        });

Validation.addAllThese([
        ['required', '<font color=#FF0000>Campo obbligatorio.</font>', function(v) {
                                return !Validation.get('IsEmpty').test(v);
                        }],
        ['validate-number', 'Inserisci un numero valido.', function(v) {
                                return Validation.get('IsEmpty').test(v) || (!isNaN(v) && !/^\s+$/.test(v));
                        }],
        ['validate-digits', 'Usa solo numeri in questo campo.non mettere spazi o altri caratteri come punti o virgole.', function(v) {
                                return Validation.get('IsEmpty').test(v) ||  !/[^\d]/.test(v);
                        }],
        ['validate-alpha', 'Usa solo lettere (a-z) in questo campo.', function (v) {
                                return Validation.get('IsEmpty').test(v) ||  /^[a-zA-Z]+$/.test(v)
                        }],
        ['validate-alphanum', 'Usa solo lettere (a-z) o numeri (0-9) in questo campo. Gli spazi non sono consentiti.', function(v) {
                                return Validation.get('IsEmpty').test(v) ||  !/\W/.test(v)
                        }],
        ['validate-date', 'Entra una data valida.', function(v) {
                                var test = new Date(v);
                                return Validation.get('IsEmpty').test(v) || !isNaN(test);
                        }],
        ['validate-email', 'Inserisci una email valida. per example fred@domain.com .', function (v) {
                                return Validation.get('IsEmpty').test(v) || /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/.test(v)
                        }],
        ['validate-url', 'Inserisci un indirizzo URL valido.', function (v) {
                                return Validation.get('IsEmpty').test(v) || /^(http|https|ftp):\/\/(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(:(\d+))?\/?/i.test(v)
                        }],
        ['validate-date-au', 'Usa questo formato di data: dd/mm/yyyy.Esempio 17/03/2006.', function(v) {
                                if(Validation.get('IsEmpty').test(v)) return true;
                                var regex = /^(\d{2})\/(\d{2})\/(\d{4})$/;
                                if(!regex.test(v)) return false;
                                var d = new Date(v.replace(regex, '$2/$1/$3'));
                                return ( parseInt(RegExp.$2, 10) == (1+d.getMonth()) ) &&
                                                        (parseInt(RegExp.$1, 10) == d.getDate()) &&
                                                        (parseInt(RegExp.$3, 10) == d.getFullYear() );
                        }],
        ['validate-currency-dollar', 'Please enter a valid $ amount. For example $100.00 .', function(v) {
                                // [$]1[##][,###]+[.##]
                                // [$]1###+[.##]
                                // [$]0.##
                                // [$].##
                                return Validation.get('IsEmpty').test(v) ||  /^\$?\-?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}\d*(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$/.test(v)
                        }],
        ['validate-selection', 'Scegli una selezione', function(v,elm){
                                return elm.options ? elm.selectedIndex > 0 : !Validation.get('IsEmpty').test(v);
                        }],
        ['validate-one-required', 'Scegli una tra le opzioni.', function (v,elm) {
                                var p = elm.parentNode;
                                var options = p.getElementsByTagName('INPUT');
                                return $A(options).any(function(elm) {
                                        return $F(elm);
                                });
                        }]
]);