//////////////////////////////
// VARIABLES
//////////////////////////////

var propWindow;
var survWindow;

var homeDomain = 'www.telstrabusiness.com';
var externalTarget = true;
var requestAgain = false;

var propWidth = 301;
var propHeight = 305;
var propURL = '/business/popup/surveyRequest.jsp';
var propWinProps = 'status=0,toolbar=0,location=0,menubar=0,directories=0,resizable=0,scrollbars=0';
var propWinName = 'proposalWindow';

var survWidth = 725;
var survHeight = 725;
var survURL = '';
var survWinProps = 'status=0,toolbar=0,location=0,menubar=0,directories=0,resizable=0,scrollbars=1';
var survWinName = 'surveyWindow';
var survFreq = 10;
var survDay='30';
var today = new Date(); 
var setDay = new Date();
setDay.setDate(today.getDate() + Number(survDay));

//////////////////////////////
// MAIN
//////////////////////////////

jQuery.noConflict();

function onLoad() {
	// After load we want to add js functions to all location changing elements to
	// prevent the survey request for internal location changes.
	editLinkOnClickEvent();
}

// Use this to detect an external link to enable survey popup
function editLinkOnClickEvent() {
	// attach onclick on to all internal links
	jQuery('a').click(function() {
		url = jQuery(this).attr('href');
		if (isInternal(url)) {
			externalTarget = false;
		}
	});
	// attach onsubmit on to all (internal) forms
	jQuery('form').submit(function() {
		url = jQuery(this).attr('action');
		if (isInternal(url)) {
			externalTarget = false;
		}
	});
}

// After unload we want to propose the survey but only for external links (in other
// words, when users are leaving the site)
function onUnload() {
	if (externalTarget) {
		propose();
	}
}

// Set load and unload events
jQuery(document).ready(function() { onLoad(); });
window.onbeforeunload = onUnload; 

//////////////////////////////
// UTILITY
//////////////////////////////

function isInternal(url) {
	// CALLS TO JS
	if (url.startsWith('javascript:')) {
		// all js functions called from links in our application do not leave the site
		return true;
	}
	
	// ONCLICK LINKS
	if (url.startsWith('#') || url == '') {
		// these links probably have onclick attributes - they do not leave the site
		return true;
	}
	
	// ABSOLUTE LINKS
	if (url.startsWith('http')) {
		if (url.startsWith('http://' + homeDomain) || url.startsWith('https://' + homeDomain)) {
			return true;
		} else {
			return false;
		}
	}
	
	// All remaining URLs are relative ones, which are internal.
	return true;
}

String.prototype.startsWith = function(str) 
{return (this.match("^"+str)==str)}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

//////////////////////////////
// SURVEY
//////////////////////////////

function propose() {
	previousResult = readCookie('survey');
	previousExpires = readCookie('expiryday');

	if (previousResult == 'accepted' || previousResult == 'declined') {
		//change all expire day from 2019 to current day + 30 days for old caches
		if(previousExpires == null)
		{
			if(previousResult == 'accepted')
			{
				document.cookie = 'expiryday=' + setDay + '; expires=Mon, 31-Dec-2029 23:59:59 GMT; path=/business';
				document.cookie = 'survey=accepted; expires=' + setDay + '; path=/business';
			}
			else
			{
				document.cookie = 'expiryday=' + setDay + '; expires=Mon, 31-Dec-2029 23:59:59 GMT; path=/business';
				document.cookie = 'survey=declined; expires=' + setDay + '; path=/business';
			}
		}
		
		// already offered
		//alert('alreay declined or accepted');
		
	} else {

		//because the string read from the cookie is not in Date format, therefore it can not be compared with "today"
		var tempDate;
		if(previousExpires != null)
		{
			tempDate=new Date(previousExpires);
		}
		
		// only if popup window if the current day is greater then cookie expiry day
		if(previousExpires == null || tempDate < today)
		{
			// random number [1,100]
			pick = 1 + Math.floor(Math.random()*100);
			// with freq >= 1, vote ranges from [100, 1]
			vote = 1 + Math.floor(99 / survFreq);
			if (vote >= pick) {
				//alert('yeah! (pick=' + pick + ',vote=' + vote + ')');
				
				// 1 Try a real, nice popup window
				if (!propWindow) {
					propWindow = window.open(propURL, propWinName, propWinProps + ',height=' + propHeight + ',width=' +
						propWidth + ',top=' + (screen.height-propHeight)/2 + ',left=' + (screen.width-propWidth)/2);
				} else {
					propWindow.focus();
				}
				
				// 2 If that did not work, try a JavaScript confirm dialog.
				//   (if the real popup fails to open there is probably a popup blocker present, so the survey popup will
				//   be blocked as well. We hope that because people have seen the confirm dialog, they'll allow the
				//   survey popup if the browser asks...)
				/*if (!propWindow) {
					if (window.confirm('We’re conducting a very short survey to help us improve your experience on the '
						+ 'Telstra Business website.\n\nIt shouldn’t take longer than 1 to 2 minutes to complete.\n\nWe '
						+ 'value your feedback, and would appreciate if you took a few moments to respond to some '
						+ 'questions.\n\nClick OK to participate or CANCEL to decline.\n\nIf you click OK and nothing '
						+ 'happens, make sure that you do not have your pop up blocker activated.')) {
						accept();
					} else {
						decline();
					}
				}*/
			} else {
				//alert('no! (pick=' + pick + ',vote=' + vote + ')');
			}
		}
	}
}