Validator = Class.create();



Validator.prototype = {

	initialize : function(className, error, test) {

		this.test = test ? test : function(){ return true };

		this.error = error ? error : 'Validation failed.';

		this.className = className;

	}

}



var Validation = Class.create();



Validation.prototype = {

	initialize : function(form, options){

		this.options = Object.extend({stopOnFirst : true}, options || {});

		this.form = $(form);

		Event.observe(this.form,'submit',this.onSubmit.bind(this),false);

	},

	onSubmit :  function(ev){

		if(!this.validate()) Event.stop(ev);

	},

	validate : function() {

		if(this.options.stopOnFirst) {

			return Form.getElements(this.form).all($V);

		} else {

			var test = Form.getElements(this.form).collect($V);

			return test.all();

		}

	}

}



Object.extend(Validation, {

	validate : function(elm, index, options){ // index is here only because we use this function in Enumerations

		var options = Object.extend({}, options || {}); // options still under development and here as a placeholder only

		elm = $(elm);

		var cn = elm.classNames();

		return result = cn.all(Validation.test.bind(elm));

	},

	test : function(name) {

		var v = $VG(name);

		var id = 'advice-' + name + '-' + this.id;

		var prop = '__advice'+name;

		if(!v.test($F(this))) {

			if(!this[prop]) {

				var advice = document.createElement('div');

				advice.appendChild(document.createTextNode(v.error));

				advice.className = 'validation-advice';

				advice.id = id;

				advice.style.display = 'none';

				this.parentNode.insertBefore(advice, this.nextSibling);

				if(typeof Effect == 'undefined') {

					advice.style.display = 'block';

				} else {

					new Effect.Appear(advice.id, {duration : 1 });

				}

			}

			this[prop] = true;

			this.removeClassName('validation-passed');

			this.addClassName('validation-failed');

			return false;

		} else {

			try {

				$(id).remove();

			} catch(e) {}

			this[prop] = '';

			this.removeClassName('validation-failed');

			this.addClassName('validation-passed');

			return true;

		}

	},

	add : function(className, error, test, options) {

		var nv = {}

		nv[className] = new Validator(className, error, test, options);

		Object.extend(Validation.methods, nv);

	},

	get : function(name) {

		return  Validation.methods[name] ? Validation.methods[name] : new Validator();

	},

	methods : {}

});



var $V = Validation.validate;

var $VG = Validation.get;

var $VA = Validation.add;



$VA('IsEmpty', '', function(v) {

				return  ((v == null) || (v.length == 0) || /^\s+$/.test(v));

			});

$VA('required', 'This is a required field.', function(v) {

				return !$VG('IsEmpty').test(v);

			});

$VA('validate-number', 'Please use numbers only in this field.', function(v) {

				return $VG('IsEmpty').test(v) || !isNaN(v);

			});

$VA('validate-digits', 'Please use numbers only in this field.', function(v) {

				return $VG('IsEmpty').test(v) ||  !/[^\d]/.test(v);

			});

$VA('validate-alpha', 'Please use letters only (a-z) in this field.', function (v) {

				return $VG('IsEmpty').test(v) ||  /^[a-zA-Z]+$/.test(v)

			});

$VA('validate-alphanum', 'Please use only letters (a-z) or numbers (0-9) only in this field. No spaces or other characters are allowed.', function(v) {

				return $VG('IsEmpty').test(v) ||  !/\W/.test(v)

			});

$VA('validate-date', 'Please enter a valid date.', function(v) {

				var test = new Date(v);

				return $VG('IsEmpty').test(v) || !isNaN(test);

			});

$VA('validate-email', 'Please enter a valid email address. For example fred@domain.com .', function (v) {

				return $VG('IsEmpty').test(v) || /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/.test(v)

			});

$VA('validate-date-au', 'Please use this date format: dd/mm/yyyy. For example 17/03/2006 for the 17th of March, 2006.', function(v) {

				if(!$VG('IsEmpty').test(v)) {

					var upper = 31;

					if(/^(\d{2})\/(\d{2})\/(\d{4})$/.test(v)) { // dd/mm/yyy

						if(RegExp.$2 == '02') upper = 29;

						if((RegExp.$1 <= upper) && (RegExp.$2 <= 12)) {

							return true;

						} else {

							return false;

						}

					} else {

						return false;

					}

				} else {

					return true;

				}

			});

$VA('validate-currency-dollar', 'Please enter a valid $ amount. For example $100.00 .', function(v) {

				// [$]1[##][,###]+[.##]

				// [$]1###+[.##]

				// [$]0.##

				// [$].##

				return $VG('IsEmpty').test(v) ||  /^\$?\-?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}\d*(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$/.test(v)

			});