Object.extend(Date.prototype,{
    tomorrow:function() {
        var date = new Date();
        date.setMonth(this.getMonth());
        date.setYear(this.getFullYear());
        date.setDate(this.getDate() + 1);
        return date;
    },
    
    format: function(dateTimeFormatString){
        var dateTimeFormat = new Template(dateTimeFormatString ? dateTimeFormatString: '#{date}/#{month}/#{year}');    
	    var yearPart = padDatePart(this.getFullYear()%100);
	    var datePart = padDatePart(this.getDate());
	    var monthPart = padDatePart(this.getMonth()+1);
	    return dateTimeFormat.evaluate({date:datePart,month:monthPart,year:yearPart});
    }
   });


var DateSelector = Class.create({
    _returnDate:    function()   {
        return this.options.returnDateTextField;
    },
    _outwardDate:   function()  {
        return this.options.outwardDateTextField;
    },
    _returnHour: function() {
		return this.options.returnHourDropDown;	
	},
	_returnMinute: function() {
		return this.options.returnMinuteDropDown;	
	},
    initialize:     function(options){
        this.options = options;
        Object.extend(this._outwardDate(),{
            today: function(){
                this.setValue(new Date().format());
            },
            tomorrow: function(){
                this.setValue(new Date().tomorrow().format());
            },
            nextDay: function(){        
                var dateShown = this._dateShown();
                return dateShown ? dateShown.tomorrow() : null;
            },
            selectedDate: function(){
                return this._dateShown();
            },
            _dateShown: function(){
                return this._unformattedDate(this.getValue());
            },
            _unformattedDate: function(currentDate){
                var array = currentDate.split("/");
                var date = new Date();
                date.setDate(padDatePart(array[0]));
                date.setMonth(padDatePart(array[1])-1);
                date.setYear(padDatePart(array[2]));
                if (!this._isValidDate(date)) return null; 
                return date;
            },
            _isValidDate: function(date){
                return date.toString() !="Invalid Date" && date.toString() != "NaN"; 
            }        
          });
            


        Object.extend(this._returnDate(),{
            sameDay: function(){
                var outwardDate = this.outwardDate().selectedDate();
				this.removeClassName('textFieldBlur');
                this.setValue(outwardDate? outwardDate.format():this.getValue());
            },
            
            nextDay: function(){
                var nextDay = this.outwardDate().nextDay();
				this.removeClassName('textFieldBlur');
                this.setValue(nextDay ? nextDay.format():this.getValue());
            },
            
            outwardDate: function(){
                return $('outwardDate');
            }
        });

		Object.extend(this._returnHour(),{
            setDefault: function(){
				if(this.getValue() != "") return;
                this.setValue("9");
            }
        });

		Object.extend(this._returnMinute(),{
            setDefault: function(){
				if(this.getValue() != "") return;
                this.setValue("0");
            }
        });
    }
});

document.observe("dom:loaded", function() {
	$('returnDate').setValue = $('returnDate').setValue.wrap(function(proceed, value){
                                      $('ReturnHour').setDefault();
                                      $('ReturnMinute').setDefault();;
                                      return proceed(value);
                                   });                                    
});