YAHOO.namespace("eyh");

var DatePickerObj = function(opts) {
	this.textfield = null;
	this.datepicker = null; // YAHOO.ext.DatePicker object
	this.calID = YAHOO.util.Dom.generateId(0, 'dpobj-dp-');
	this.showDatePicker = null;
	this.config = {
		textfield: null, // id/HTML Element
		showPickerOnFocus: false, // show the picker when the textfield is focused
		outputDateFmt: 'm/d/Y',
		showPicker: null,
		twoDigitYearCutoff: 1980 // null to ignore, otherwise dates before this have 100 years added to them (1904 becomes 2004).
	};

	// initialize our config
	if( typeof opts != 'undefined' ) {
		for( var c in this.config) {
			if( typeof opts[c] != "undefined" ) {
				this.config[c] = opts[c];
			}
		}
	}
}

DatePickerObj.prototype.init = function() {
	if( this.config.showPicker ) {
		this.showDatePicker = getEl(this.config.showPicker);
		// add our click handler to show the link
		this.showDatePicker.on('click', this.show, this, true);
	}
	if( this.config.textfield ) {
		this.textfield = getEl(this.config.textfield);
		if( this.config.showPickerOnFocus ) {
			this.textfield.set({autocomplete:'off'}); // work around firefox errors
			this.textfield.on('focus', this.show, this, true);
		}
	}
	this.datepicker = new YAHOO.ext.DatePicker(this.calID);
}

DatePickerObj.prototype.show = function() {
	var selectedDate = new Date();
	var _this = this; // scope our callback appropriately
	var r = { left:0, bottom:0 };
	if( this.textfield && this.config.showPickerOnFocus ) {
		r = this.textfield.getRegion();
	} else if( this.showDatePicker ) {
		r = this.showDatePicker.getRegion();
	}
	if( this.textfield && this.textfield.dom.value != '' ) {
		selectedDate = Date.parse(this.textfield.dom.value);
		if( isNaN(selectedDate) ) {
			selectedDate = new Date();
		} else {
			selectedDate = new Date(selectedDate);
			if( this.config.twoDigitYearCutoff && selectedDate.getFullYear() <= this.config.twoDigitYearCutoff ) {
				selectedDate.setFullYear(selectedDate.getFullYear()+100);
			}
		}
	}
	this.datepicker.show(r.left, r.bottom, selectedDate, function(selDate) { _this.dateSelectionHandler(selDate); } );
}

// override this to deal with other types of elements like select boxes
DatePickerObj.prototype.dateSelectionHandler = function(selDate) {
	if( this.textfield ) {
		this.textfield.dom.value = selDate.dateFormat(this.config.outputDateFmt);
	}
}
/* end */