/**
 * Change location jquery plugin. To see supported html structure please go to apps/dunkindonuts/components/changelocation/changelocation.jsp
 * @see apps/dunkindonuts/components/changelocation/changelocation.jsp
 * @author Ilya Mestnikov
 * @version 1.0
 * @param <code>options</code> contains the following fields:
 * - url: url to submit request.
 * - ... 
 */
(function($){
	
	/**
	 * US zip validator
	 */
	function isValidUSZip(sZip) {
	   return /^\d{5}(-\d{4})?$/.test(sZip);
	}
	
	$.fn.extend({
		changelocation: function(options) {
			var o = $.extend({
				view: "#locationView",
				edit: "#locationEdit",
				loginLink: "#changingLocation .logout",
				changeBtn: "#changeLocation",
				changeInput: "input[name=locationInput]",
				cancelBtn: "#locationUpdateCancel",
				updateBtn: "#locationUpdate",
				locationText: ".locationText",
				locationError: "#locationError",
				suggestionMessage: "Enter Your Zip Code",
				errorMessage: "Enter Valid Zip Code"
			}, options);
			
			return $(this).each(function() {
				var view = $(o.view); //view block
				var edit = $(o.edit); // edit block
				var loginLink = $(o.loginLink); //login link
				var changeBtn = $(o.changeBtn, view); // button to change from view to edit
				var cancelBtn = $(o.cancelBtn, edit); // button to cancel 
				var updateBtn = $(o.updateBtn, edit);
				var changeInput = $(o.changeInput, edit); // location input field
				var locationText = $(o.locationText, view); //block containing formatted location text
				var form = $(this).parent("form");
				changeBtn.click(function(){
					view.hide();
					loginLink.hide();
					edit.show();
					changeInput.val(o.suggestionMessage);
					return false;
				});
				
				changeInput.blur(function() {
					if ($(this).val() == "") {
						$(this).val(o.suggestionMessage);
					}
				});
				
				changeInput.focus(function() {
					if ($(this).val() == o.suggestionMessage) {
						$(this).val("");
					}
				});
				
				cancelBtn.click(function() {
					view.show();
					loginLink.show();
					edit.hide();
					return false;
				});
				
				updateBtn.click(function() {
					form.submit();
					return false;
				});
				
				form.submit(function(){
					var val = changeInput.val();
					if (!isValidUSZip(val)) {
						$(o.locationError, edit).text(o.errorMessage);
						return false;
					}
				});
			});
		}
	});
	
})(jQuery);