webshims.register('form-number-date-api', function($, webshims, window, document, undefined, options){
	"use strict";
	if(!webshims.addInputType){
		webshims.error("you can not call forms-ext feature after calling forms feature. call both at once instead: $.webshims.polyfill('forms forms-ext')");
	}
	
	if(!webshims.getStep){
		webshims.getStep = function(elem, type){
			var step = $.attr(elem, 'step');
			if(step === 'any'){
				return step;
			}
			type = type || getType(elem);
			if(!typeModels[type] || !typeModels[type].step){
				return step;
			}
			step = typeProtos.number.asNumber(step);
			return ((!isNaN(step) && step > 0) ? step : typeModels[type].step) * (typeModels[type].stepScaleFactor || 1);
		};
	}
	if(!webshims.addMinMaxNumberToCache){
		webshims.addMinMaxNumberToCache = function(attr, elem, cache){
			if (!(attr+'AsNumber' in cache)) {
				cache[attr+'AsNumber'] = typeModels[cache.type].asNumber(elem.attr(attr));
				if(isNaN(cache[attr+'AsNumber']) && (attr+'Default' in typeModels[cache.type])){
					cache[attr+'AsNumber'] = typeModels[cache.type][attr+'Default'];
				}
			}
		};
	}
	
	var nan = parseInt('NaN', 10),
		doc = document,
		typeModels = webshims.inputTypes,
		isNumber = function(string){
			return (typeof string == 'number' || (string && string == string * 1));
		},
		supportsType = function(type){
			return ($('<input type="'+type+'" />').prop('type') === type);
		},
		getType = function(elem){
			return (elem.getAttribute('type') || '').toLowerCase();
		},
		isDateTimePart = function(string){
			return (string && !(isNaN(string * 1)));
		},
		addMinMaxNumberToCache = webshims.addMinMaxNumberToCache,
		addleadingZero = function(val, len){
			val = ''+val;
			len = len - val.length;
			for(var i = 0; i < len; i++){
				val = '0'+val;
			}
			return val;
		},
		EPS = 1e-7,
		typeBugs = webshims.bugs.bustedValidity
	;
	
	webshims.addValidityRule('stepMismatch', function(input, val, cache, validityState){
		if(val === ''){return false;}
		if(!('type' in cache)){
			cache.type = getType(input[0]);
		}
		if(cache.type == 'week'){return false;}
		var ret = (validityState || {}).stepMismatch || false, base;
		if(typeModels[cache.type] && typeModels[cache.type].step){
			if( !('step' in cache) ){
				cache.step = webshims.getStep(input[0], cache.type);
			}
			
			if(cache.step == 'any'){return false;}
			
			if(!('valueAsNumber' in cache)){
				cache.valueAsNumber = typeModels[cache.type].asNumber( val );
			}
			if(isNaN(cache.valueAsNumber)){return false;}
			
			addMinMaxNumberToCache('min', input, cache);
			base = cache.minAsNumber;
			if(isNaN(base)){
				base = typeModels[cache.type].stepBase || 0;
			}
			
			ret =  Math.abs((cache.valueAsNumber - base) % cache.step);
							
			ret = !(  ret <= EPS || Math.abs(ret - cache.step) <= EPS  );
		}
		return ret;
	});
	
	
	
	[{name: 'rangeOverflow', attr: 'max', factor: 1}, {name: 'rangeUnderflow', attr: 'min', factor: -1}].forEach(function(data, i){
		webshims.addValidityRule(data.name, function(input, val, cache, validityState) {
			var ret = (validityState || {})[data.name] || false;
			if(val === ''){return ret;}
			if (!('type' in cache)) {
				cache.type = getType(input[0]);
			}
			if (typeModels[cache.type] && typeModels[cache.type].asNumber) {
				if(!('valueAsNumber' in cache)){
					cache.valueAsNumber = typeModels[cache.type].asNumber( val );
				}
				if(isNaN(cache.valueAsNumber)){
					return false;
				}
				
				addMinMaxNumberToCache(data.attr, input, cache);
				
				if(isNaN(cache[data.attr+'AsNumber'])){
					return ret;
				}
				ret = ( cache[data.attr+'AsNumber'] * data.factor <  cache.valueAsNumber * data.factor - EPS );
			}
			return ret;
		});
	});
	
	webshims.reflectProperties(['input'], ['max', 'min', 'step']);
	
	
	//IDLs and methods, that aren't part of constrain validation, but strongly tight to it
	var valueAsNumberDescriptor = webshims.defineNodeNameProperty('input', 'valueAsNumber', {
		prop: {
			get: function(){
				var elem = this;
				var type = getType(elem);
				var ret = (typeModels[type] && typeModels[type].asNumber) ? 
					typeModels[type].asNumber($.prop(elem, 'value')) :
					(valueAsNumberDescriptor.prop._supget && valueAsNumberDescriptor.prop._supget.apply(elem, arguments));
				if(ret == null){
					ret = nan;
				}
				return ret;
			},
			set: function(val){
				var elem = this;
				var type = getType(elem);
				if(typeModels[type] && typeModels[type].numberToString){
					//is NaN a number?
					if(isNaN(val)){
						$.prop(elem, 'value', '');
						return;
					}
					var set = typeModels[type].numberToString(val);
					if(set !==  false){
						$.prop(elem, 'value', set);
					} else {
						webshims.error('INVALID_STATE_ERR: DOM Exception 11');
					}
				} else if(valueAsNumberDescriptor.prop._supset) {
					 valueAsNumberDescriptor.prop._supset.apply(elem, arguments);
				}
			}
		}
	});
	
	var valueAsDateDescriptor = webshims.defineNodeNameProperty('input', 'valueAsDate', {
		prop: {
			get: function(){
				var elem = this;
				var type = getType(elem);
				return (typeModels[type] && typeModels[type].asDate && !typeModels[type].noAsDate) ? 
					typeModels[type].asDate($.prop(elem, 'value')) :
					valueAsDateDescriptor.prop._supget && valueAsDateDescriptor.prop._supget.call(elem) || null;
			},
			set: function(value){
				var elem = this;
				var type = getType(elem);
				if(typeModels[type] && typeModels[type].dateToString && !typeModels[type].noAsDate){
					
					if(value === null){
						$.prop(elem, 'value', '');
						return '';
					}
					var set = typeModels[type].dateToString(value);
					if(set !== false){
						$.prop(elem, 'value', set);
						return set;
					} else {
						webshims.error('INVALID_STATE_ERR: DOM Exception 11');
					}
				} else {
					return valueAsDateDescriptor.prop._supset && valueAsDateDescriptor.prop._supset.apply(elem, arguments) || null;
				}
			}
		}
	});
	
	$.each({stepUp: 1, stepDown: -1}, function(name, stepFactor){
		var stepDescriptor = webshims.defineNodeNameProperty('input', name, {
			prop: {
				value: function(factor){
					var step, val, dateVal, valModStep, alignValue, cache;
					var type = getType(this);
					if(typeModels[type] && typeModels[type].asNumber){
						cache = {type: type};
						if(!factor){
							factor = 1;
							webshims.info("you should always use a factor for stepUp/stepDown");
						}
						factor *= stepFactor;
						
						val = $.prop(this, 'valueAsNumber');
						
						if(isNaN(val)){
							webshims.info("valueAsNumber is NaN can't apply stepUp/stepDown ");
							throw('invalid state error');
						}
						
						step = webshims.getStep(this, type);
						
						if(step == 'any'){
							webshims.info("step is 'any' can't apply stepUp/stepDown");
							throw('invalid state error');
						}
						
						webshims.addMinMaxNumberToCache('min', $(this), cache);
						webshims.addMinMaxNumberToCache('max', $(this), cache);
						
						step *= factor;
						
						val = (val + step).toFixed(5) * 1;
						valModStep = (val - (cache.minAsNumber || 0)) % step;
						
						if ( valModStep && (Math.abs(valModStep) > EPS) ) {
							alignValue = val - valModStep;
							alignValue += ( valModStep > 0 ) ? step : ( -step );
							val = alignValue.toFixed(5) * 1;
						}
						
						if( (!isNaN(cache.maxAsNumber) && val > cache.maxAsNumber) || (!isNaN(cache.minAsNumber) && val < cache.minAsNumber) ){
							webshims.info("max/min overflow can't apply stepUp/stepDown");
							throw('invalid state error');
						}
						if(dateVal){
							$.prop(this, 'valueAsDate', dateVal);
						} else {
							$.prop(this, 'valueAsNumber', val);
						}
					} else if(stepDescriptor.prop && stepDescriptor.prop.value){
						return stepDescriptor.prop.value.apply(this, arguments);
					} else {
						webshims.info("no step method for type: "+ type);
						throw('invalid state error');
					}
				}
			}
		});
	});
	
	/*
	 * ToDO: WEEK
	 */
//	var getWeek = function(date){
//		var time;
//		var checkDate = new Date(date.getTime());
//
//		checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
//
//		time = checkDate.getTime();
//		checkDate.setMonth(0);
//		checkDate.setDate(1);
//		return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
//	};
//	
//	var setWeek = function(year, week){
//		var date = new Date(year, 0, 1);
//		
//		week = (week - 1) * 86400000 * 7;
//		date = new Date(date.getTime() + week);
//		date.setDate(date.getDate() + 1 - (date.getDay() || 7));
//		return date;
//	};
	
	var typeProtos = {
		
		number: {
			bad: function(val){
				return !(isNumber(val));
			},
			step: 1,
			//stepBase: 0, 0 = default
			stepScaleFactor: 1,
			asNumber: function(str){
				return (isNumber(str)) ? str * 1 : nan;
			},
			numberToString: function(num){
				return (isNumber(num)) ? num : false;
			}
		},
		
		range: {
			minDefault: 0,
			maxDefault: 100
		},
		color: {
			bad: (function(){
				var cReg = /^\u0023[a-f0-9]{6}$/;
				return function(val){
					return (!val || val.length != 7 || !(cReg.test(val)));
				};
			})()
		},
		date: {
			bad: function(val){
				if(!val || !val.split || !(/\d$/.test(val))){return true;}
				var i;
				var valA = val.split(/\u002D/);
				if(valA.length !== 3){return true;}
				var ret = false;
				
				
				if(valA[0].length < 4 || valA[1].length != 2 || valA[1] > 12 || valA[2].length != 2 || valA[2] > 33){
					ret = true;
				} else {
					for(i = 0; i < 3; i++){
						if(!isDateTimePart(valA[i])){
							ret = true;
							break;
						}
					}
				}
				
				return ret || (val !== this.dateToString( this.asDate(val, true) ) );
			},
			step: 1,
			//stepBase: 0, 0 = default
			stepScaleFactor:  86400000,
			asDate: function(val, _noMismatch){
				if(!_noMismatch && this.bad(val)){
					return null;
				}
				return new Date(this.asNumber(val, true));
			},
			asNumber: function(str, _noMismatch){
				var ret = nan;
				if(_noMismatch || !this.bad(str)){
					str = str.split(/\u002D/);
					ret = Date.UTC(str[0], str[1] - 1, str[2]);
				}
				return ret;
			},
			numberToString: function(num){
				return (isNumber(num)) ? this.dateToString(new Date( num * 1)) : false;
			},
			dateToString: function(date){
				return (date && date.getFullYear) ? addleadingZero(date.getUTCFullYear(), 4) +'-'+ addleadingZero(date.getUTCMonth()+1, 2) +'-'+ addleadingZero(date.getUTCDate(), 2) : false;
			}
		},
		/*
		 * ToDO: WEEK
		 */
//		week: {
//			bad: function(val){
//				if(!val || !val.split){return true;}
//				var valA = val.split('-W');
//				var ret = true;
//				if(valA.length == 2 && valA[0].length > 3 && valA.length == 2){
//					ret = this.dateToString(setWeek(valA[0], valA[1])) != val;
//				}
//				return ret;
//			},
//			step: 1,
//			stepScaleFactor: 604800000,
//			stepBase: -259200000,
//			asDate: function(str, _noMismatch){
//				var ret = null;
//				if(_noMismatch || !this.bad(str)){
//					ret = str.split('-W');
//					ret = setWeek(ret[0], ret[1]);
//				}
//				return ret;
//			},
//			asNumber: function(str, _noMismatch){
//				var ret = nan;
//				var date = this.asDate(str, _noMismatch);
//				if(date && date.getUTCFullYear){
//					ret = date.getTime();
//				}
//				return ret;
//			},
//			dateToString: function(date){
//				var week, checkDate;
//				var ret = false;
//				if(date && date.getFullYear){
//					week = getWeek(date);
//					if(week == 1){
//						checkDate = new Date(date.getTime());
//						checkDate.setDate(checkDate.getDate() + 7);
//						date.setUTCFullYear(checkDate.getUTCFullYear());
//					}
//					ret = addleadingZero(date.getUTCFullYear(), 4) +'-W'+addleadingZero(week, 2);
//				}
//				return ret;
//			},
//			numberToString: function(num){
//				return (isNumber(num)) ? this.dateToString(new Date( num * 1)) : false;
//			}
//		},
		time: {
			bad: function(val, _getParsed){
				if(!val || !val.split || !(/\d$/.test(val))){return true;}
				val = val.split(/\u003A/);
				if(val.length < 2 || val.length > 3){return true;}
				var ret = false,
					sFraction;
				if(val[2]){
					val[2] = val[2].split(/\u002E/);
					sFraction = parseInt(val[2][1], 10);
					val[2] = val[2][0];
				}
				$.each(val, function(i, part){
					if(!isDateTimePart(part) || part.length !== 2){
						ret = true;
						return false;
					}
				});
				if(ret){return true;}
				if(val[0] > 23 || val[0] < 0 || val[1] > 59 || val[1] < 0){
					return true;
				}
				if(val[2] && (val[2] > 59 || val[2] < 0 )){
					return true;
				}
				if(sFraction && isNaN(sFraction)){
					return true;
				}
				if(sFraction){
					if(sFraction < 100){
						sFraction *= 100;
					} else if(sFraction < 10){
						sFraction *= 10;
					}
				}
				return (_getParsed === true) ? [val, sFraction] : false;
			},
			step: 60,
			stepBase: 0,
			stepScaleFactor:  1000,
			asDate: function(val){
				val = new Date(this.asNumber(val));
				return (isNaN(val)) ? null : val;
			},
			asNumber: function(val){
				var ret = nan;
				val = this.bad(val, true);
				if(val !== true){
					ret = Date.UTC('1970', 0, 1, val[0][0], val[0][1], val[0][2] || 0);
					if(val[1]){
						ret += val[1];
					}
				}
				return ret;
			},
			dateToString: function(date){
				if(date && date.getUTCHours){
					var str = addleadingZero(date.getUTCHours(), 2) +':'+ addleadingZero(date.getUTCMinutes(), 2),
						tmp = date.getSeconds()
					;
					if(tmp != "0"){
						str += ':'+ addleadingZero(tmp, 2);
					}
					tmp = date.getUTCMilliseconds();
					if(tmp != "0"){
						str += '.'+ addleadingZero(tmp, 3);
					}
					return str;
				} else {
					return false;
				}
			}
		},
		month: {
			bad: function(val){
				return typeProtos.date.bad(val+'-01');
			},
			step: 1,
			stepScaleFactor:  false,
			//stepBase: 0, 0 = default
			asDate: function(val){
				return new Date(typeProtos.date.asNumber(val+'-01'));
			},
			asNumber: function(val){
				//1970-01
				var ret = nan;
				if(val && !this.bad(val)){
					val = val.split(/\u002D/);
					val[0] = (val[0] * 1) - 1970;
					val[1] = (val[1] * 1) - 1;
					ret = (val[0] * 12) + val[1];
				}
				return ret;
			},
			numberToString: function(num){
				var mod;
				var ret = false;
				if(isNumber(num)){
					mod = (num % 12);
					num = ((num - mod) / 12) + 1970;
					mod += 1;
					if(mod < 1){
						num -= 1;
						mod += 12;
					}
					ret = addleadingZero(num, 4)+'-'+addleadingZero(mod, 2);
					
				}
				
				return ret;
			},
			dateToString: function(date){
				if(date && date.getUTCHours){
					var str = typeProtos.date.dateToString(date);
					return (str.split && (str = str.split(/\u002D/))) ? str[0]+'-'+str[1] : false;
				} else {
					return false;
				}
			}
		}
		,'datetime-local': {
			bad: function(val, _getParsed){
				if(!val || !val.split || (val+'special').split(/\u0054/).length !== 2){return true;}
				val = val.split(/\u0054/);
				return ( typeProtos.date.bad(val[0]) || typeProtos.time.bad(val[1], _getParsed) );
			},
			noAsDate: true,
			asDate: function(val){
				val = new Date(this.asNumber(val));
				
				return (isNaN(val)) ? null : val;
			},
			asNumber: function(val){
				var ret = nan;
				var time = this.bad(val, true);
				if(time !== true){
					val = val.split(/\u0054/)[0].split(/\u002D/);
					
					ret = Date.UTC(val[0], val[1] - 1, val[2], time[0][0], time[0][1], time[0][2] || 0);
					if(time[1]){
						ret += time[1];
					}
				}
				return ret;
			},
			dateToString: function(date, _getParsed){
				return typeProtos.date.dateToString(date) +'T'+ typeProtos.time.dateToString(date, _getParsed);
			}
		}
	};
	
	if(typeBugs || !supportsType('range') || !supportsType('time') || !supportsType('month') || !supportsType('datetime-local')){
		typeProtos.range = $.extend({}, typeProtos.number, typeProtos.range);
		typeProtos.time = $.extend({}, typeProtos.date, typeProtos.time);
		typeProtos.month = $.extend({}, typeProtos.date, typeProtos.month);
		typeProtos['datetime-local'] = $.extend({}, typeProtos.date, typeProtos.time, typeProtos['datetime-local']);
	}
	
	//
	['number', 'month', 'range', 'date', 'time', 'color', 'datetime-local'].forEach(function(type){
		if(typeBugs || !supportsType(type)){
			webshims.addInputType(type, typeProtos[type]);
		}
	});
	
	if($('<input />').prop('labels') == null){
		webshims.defineNodeNamesProperty('button, input, keygen, meter, output, progress, select, textarea', 'labels', {
			prop: {
				get: function(){
					if(this.type == 'hidden'){return null;}
					var id = this.id;
					var labels = $(this)
						.closest('label')
						.filter(function(){
							var hFor = (this.attributes['for'] || {});
							return (!hFor.specified || hFor.value == id);
						})
					;
					
					if(id) {
						labels = labels.add('label[for="'+ id +'"]');
					}
					return labels.get();
				},
				writeable: false
			}
		});
	}
	
});