/********************** Global constants ********************/
//*** NO LONGER NEEDED - SET IN HEADER.JSPF ****
//var SERVER_NAME = "localhost:8080"; //"dev.torontopubliclibrary.ca";
//var SITE_ROOT = "/endecaApp";
//var SITE_PAGES = "/endecaApp/pages";

/** ******************** Initial page load methods ******************* */

window.onload = function() {
	Common.onPageLoad();

	setTimeout("Common.allOtherPageLoads();", 100);

};

window.onunload = function() {
	// GUnload();

}

window.onresize = function() {
	// Widgets.positionEditButtons();
};

Common = {}

Common.onPageLoad = function() {

	Common.enableMerchPreviewMode();
	Common.checkJavascriptEnabled();
	Common.browserCompatibilityFixes();
	Common.displayMemberLinks();	
}

Common.allOtherPageLoads = function() {

	Widgets.onPageLoad();	
	Accessibility.onPageLoad();
	Branches.onPageLoad();
	Search.onPageLoad();
	Share.onPageLoad();
	Calendar.onPageLoad();
	Details.onPageLoad();
}

Common.goBack = function() {
	history.go(-1);
	return false;
}

// Get the current location encoded
Common.getCurrentLocationEncoded = function() {
	var currentLocation = document.URL;
	return escape(currentLocation);	
}
Common.checkJavascriptEnabled = function() {

	var enabledElems = Common.getElementsByClassName(document, "*",
			"elem_jsEnabled");
	var disabledElems = Common.getElementsByClassName(document, "*",
			"elem_jsDisabled");

	Common.setSessionCookie("jsCapable", "true", "/");

	// alert(enabledElems.length);
	for ( var i = 0; i < enabledElems.length; i++) {
		enabledElems[i].style.display = "block";
	}
	for ( var i = 0; i < disabledElems.length; i++) {
		disabledElems[i].style.display = "none";
	}

}

Common.browserCompatibilityFixes = function() {

	// Header links in IE6
	if (Common.checkIfIEVersion(6)) {
		if (document.getElementById("page-banner") != null)
			document.getElementById("page-banner").style.marginTop = "-37px";
		if (document.getElementById("find-your-way") != null)
			document.getElementById("find-your-way").style.paddingBottom = "0px";
	}

}

// If Nmrf param exists in querystring (merch preview mode), append it to all
// links also
Common.enableMerchPreviewMode = function() {
	var filter = Common.getQueryParameter("Nmrf");
	if (filter != '') {
		var links = document.getElementsByTagName("A");
		for ( var i = 0; i < links.length; i++) {
			var url = links[i].href;
			if (url.indexOf("Nmrf") == -1) {
				if (url.indexOf("?") == -1)
					links[i].href = url + '?Nmrf=' + filter;
				else
					links[i].href = url + '&Nmrf=' + filter;
			}
		}
	}
}

/** ************************ Browser / DOM methods *********************** */

Common.getElementsByClassName = function(oElm, strTagName, strClassName) {
	if (oElm != null) {
		if (oElm.getElementsByClassName)
			return oElm.getElementsByClassName(strClassName);
		else {
			var arrElements = (strTagName == "*" && document.all) ? document.all
					: oElm.getElementsByTagName(strTagName);
			var arrReturnElements = new Array();
			strClassName = strClassName.replace(/\-/g, "\\-");
			var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
			var elementClass;
			for ( var i = 0; i < arrElements.length; i++) {
				elementClass = arrElements[i].getAttribute("className");
				if (elementClass == null)
					elementClass = arrElements[i].attributes["className"];
				if (oRegExp.test(elementClass)) {
					arrReturnElements.push(arrElements[i]);
				}
			}
			return (arrReturnElements);
		}
	}
}

Common.getQueryParameter = function(name) {
	return Common.getKeyValue(window.location.href, name);

}

// Returns the value for a specific key in the passed in keyvalue pair string
Common.getKeyValue = function(pairs, key) {
	if (pairs != null) {
		if (pairs.substring(0, 1) != "?")
			pairs = "?" + pairs;

		var regkey = key.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
		var regexS = "[\\?&]" + regkey + "=([^&#]*)";
		var regex = new RegExp(regexS);
		var results = regex.exec(pairs);
		if (results != null)
			return results[1];

	}
	return "";
}

// This function compiles a keyvalue string from all form elements using their
// name as key.
// Makes checkbox values of same name space separated.
Common.getFormKeyValuePairs = function(form) {
	var returnstring = "";
	var currName = "";
	for ( var i = 0; i < form.elements.length; i++) {

		if (form.elements[i].type == "text"
				|| form.elements[i].type == "textarea") {
			returnstring += form.elements[i].name + "="
					+ form.elements[i].value + ","
		} else if (form.elements[i].type == "radio") {
			if (form.elements[i].checked)
				returnstring += form.elements[i].name + "="
						+ form.elements[i].value + ","
		} else if (form.elements[i].type == "checkbox") {
			if (form.elements[i].checked) {
				if (form.elements[i].name = currName) {
					returnstring += returnstring.substring(0,
							returnstring.length - 1)
							+ " " + form.elements[i].value + ","
				} else {
					returnstring += form.elements[i].value + "=1,"
				}
				currName = form.elements[i].name;
			}
		} else if (form.elements[i].type == "select-one") {
			returnstring += form.elements[i].name
					+ "="
					+ form.elements[i].options[form.elements[i].selectedIndex].text
					+ ","
		}
	}
	if (returnstring.length > 0)
		returnstring = returnstring.substring(0, returnstring.length - 1);

	return returnstring;
}

// This function sets all form elements by name(key) based on the keyvalue pair
// string passed in.
// Assumes checkbox values are space separated.
Common.setFormKeyValuePairs = function(form, pairstring) {

	if (pairstring != null && form != null) {

		var pairs = pairstring.split(",");
		for ( var i = 0; i < pairs.length; i++) {
			var key = pairs[i].split("=")[0];
			var value = pairs[i].split("=")[1];

			var elems = form.elements[key];
			if (elems[0] == undefined)
				break;

			if (elems[0].type == "radio") {
				for ( var n = 0; n < elems.length; n++) {
					if (elems[n].value == value)
						elems[n].checked = true;
				}
			} else if (elems[0].type == "checkbox" || elems.type == "checkbox") {
				for ( var n = 0; n < elems.length; n++) {
					var values = value.split(" ");
					for ( var x = 0; x < values.length; x++) {
						if (elems[n].value == values[x]) {
							elems[n].checked = true;
							break;
						}
					}
				}
			} else if (elems.type == "select-one") {
				for ( var n = 0; n < elems.options.length; n++) {
					if (elems.options[n].value == value) {
						elems.selectedIndex = n;
						break;
					}
				}
			} else if (elems.type == "text" || elems.type == "textarea") {
				elems.value = value;
			}
		}
	}
}

Common.getQueryString = function() {

	var url = window.location.toString();
	if (url.indexOf("?") > -1) {
		url.match(/\?(.+)$/);
		var params = RegExp.$1;
		return (params == "$super" ? "" : "?" + params);
	} else {
		return "";
	}

}

/** ************ Get an elements absolute positioning ************** */

Common.getAbsoluteY = function(oElement) {
	var iReturnValue = 0;
	while (oElement != null) {
		iReturnValue += oElement.offsetTop;
		oElement = oElement.offsetParent;
	}
	// alert("Y: " + iReturnValue);
	return iReturnValue;
}

Common.getAbsoluteX = function(oElement) {
	var iReturnValue = 0;
	while (oElement != null) {
		iReturnValue += oElement.offsetLeft;
		oElement = oElement.offsetParent;
	}
	// alert("X: " + iReturnValue);
	return iReturnValue;
}

Common.togglePopup = function(oTarget, oPopup, offsetX, offsetY) {
	if (oPopup.style.display == 'block')
		Common.hidePopup(oPopup);
	else
		Common.showPopup(oTarget, oPopup, offsetX, offsetY);
}

Common.showPopup = function(oTarget, oPopup, offsetX, offsetY) {

	oPopup.style.left = Common.getAbsoluteX(oTarget) + offsetX + "px";
	oPopup.style.top = Common.getAbsoluteY(oTarget) + offsetY + "px";
	oPopup.style.display = 'block';
}

Common.hidePopup = function(oPopup) {

	oPopup.style.display = 'none';
}

Common.checkIfIE = function() {

	var ver = navigator.appVersion;
	if (ver.indexOf("MSIE") != -1)
		return true;
	else
		return false;

}

Common.checkIfIEVersion = function(isVersion) {
	if (Common.checkIfIE()) {
		var version = parseFloat(navigator.appVersion.split("MSIE")[1])
		if (version == isVersion)
			return true;
		else
			return false;
	} else {
		return false;
	}
}

Common.toggleDisplay = function(sPanel) {

	var oPanel = document.getElementById(sPanel);
	if (oPanel.style.display == 'block')
		Common.hideBlock(sPanel);
	else
		Common.showBlock(sPanel);
}

Common.showBlock = function(sPanel) {

	var oPanel = document.getElementById(sPanel);
	oPanel.style.display = 'block';

}

Common.hideBlock = function(sPanel) {

	var oPanel = document.getElementById(sPanel);
	oPanel.style.display = 'none';

}

/** ************ Read, write and clear user cookies ************ */

Common.getCookie = function(name) {

	var cookies = document.cookie.split(/[; ]+/);
	for ( var i = 0; i < cookies.length; i++) {
		var aName = cookies[i].substring(0, cookies[i].indexOf('='));
		if (aName == name) {
			var cookie = cookies[i].substring(cookies[i].indexOf('=') + 1);
			return unescape(cookie);
		}
	}
	return null;
}

Common.setCookie = function(name, value, context) {

	var expires = new Date();
	expires.setDate(expires.getDate() + 365);

	var newCookie = name + "=" + escape(value) + ";expires=" + expires
			+ ";path=" + context;
	document.cookie = newCookie;

}
Common.setSessionCookie = function(name, value, context) {

	var newCookie = name + "=" + escape(value) + ";path=" + context; //IE (6, 7, 8 and 9) do not accept Expire=0 when setting a session cookie so that parameter is skipped
	document.cookie = newCookie;

}
Common.setCookieExp = function(name, value, context, hours) {

	var now = new Date();
	expires = hours * 60 * 60 * 1000;
	expires = new Date(now.getTime() + expires);
	var newCookie = name + "=" + escape(value) + ";expires="
			+ expires.toGMTString() + ";path=" + context;
	document.cookie = newCookie;

}

Common.setDomainCookieExp = function (name, value, context, domain, hours) {
	var now = new Date();
	expires = hours * 60 * 60 * 1000;
	expires = new Date(now.getTime() + expires);
	var newCookie = name + "=" + escape(value) + ";expires="
			+ expires.toGMTString() + ";domain=" + domain + ";path=" + context;
	document.cookie = newCookie;
}

Common.clearCookies = function(context) {
	var res = 1;
	if (context == '/') {
		res = confirm(
				"This will clear any content and accessibility preferences you may have set on the site. Do you want to continue?",
				"Reset");
	}
	if (res) {
		var c = document.cookie.split(";");
		for ( var i = 0; i < c.length; i++) {
			var e = c[i].indexOf("=");
			var n = e > -1 ? c[i].substr(0, e) : c[i];
			document.cookie = n
					+ "=;expires=Thu, 01 Jan 1970 00:00:00 GMT;path=" + context;
		}
		location.reload(true);
	}
}

Common.deleteCookie = function(name) {
	var cookies = document.cookie.split(/[; ]+/);
	for ( var i = 0; i < cookies.length; i++) {
		var aName = cookies[i].substring(0, cookies[i].indexOf('='));
		if (aName == name) {
			document.cookie = aName
					+ "=;expires=Thu, 01 Jan 1970 00:00:00 GMT;path=/";
		}
	}
	// location.reload(true);
}

/** ********* Loads the specified page content using Ajax *************** */

Common.loadAjaxComponent = function(filename, params, targetid) {
	var ajaxData = params;
	var ajaxResponse = jQuery
			.ajax( {
				url :SITE_ROOT + "/components/" + filename,
				data :ajaxData,
				dataType :"html",
				async :true,
				timeout :120000,
				success : function(data, textStatus, XMLHttpRequest) {
					Common.replaceWithAjax(data, targetid);
				},
				error : function() {
					Common
							.replaceWithAjax(
									"Sorry--could not load branch holdings.  Please try again.",
									targetid);
				}
			})

	return ajaxResponse;

}

/** ********* Function for Ajax-based loader above *************** */

Common.replaceWithAjax = function(data, targetid) {
	if (targetid != '' && targetid != null) {
		var element = document.getElementById(targetid);
		if (element != null)
			element.innerHTML = data;
	}
}
/**
 * ***********clears out an input box with
 * 
 * @id **********************
 */
Common.clearInputBox = function(id) {
	var element = document.getElementById(id);
	element.value = "";
}

/** ************ Member login display for header ***************** */

Common.displayMemberLinks = function() {
	var account_url = "http://catalogue.torontopubliclibrary.ca/uhtbin/cgisirsi/x/TPL/0/57/30?";
	var login_url = "http://ezproxy.torontopubliclibrary.ca/login?url=http://ezproxy.torontopubliclibrary.ca/sso/myacct";
	var user_id = Common.getCookie('user_id');
	var password = Common.getCookie('password');

	var oLinks = document.getElementById("member-links");
	if (oLinks != null) {
		var msg = '';
		if (Common.getCookie('user_id') != "") {
			msg = +'You are logged in | ';
			var full_url = account_url + "user_id=" + user_id + "&password="
					+ password;
			msg = +'<a href="javascript:void(0)" onclick="window.open(full_url,\'Sana\',\'height=500,width=800,toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0\')">Your Account</a>';
		} else {
			msg = +'<a href="javascript:void(0)" onclick="window.open(login_url,\'Sana\',\'height=500,width=800,toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0\')">Sign In / Register</a>';
		}
		oLinks.innerHtml = msg;
	}
}

/**
 * ************ Cookie incrementer & functions for Place Hold history manipulation
 * *****************
 */

Common.getStepsSinceHold = function() {
	return Common.getCookie("stepsSinceHold");
}

Common.incrementStepsSinceHold = function() {
	currentSteps = Common.getCookie("stepsSinceHold");
	Common.setCookie("stepsSinceHold", parseInt(currentSteps) + 1, "/");

}

Common.returnFromHold = function() {
	historyLength = history.length;
	currentSteps = Common.getCookie("stepsSinceHold");	
	// If their currentSteps is greater than their history length, they've opened a new tab, so we should let the link function instead of returning them via history
	debugMessage = "Current Steps: " + currentSteps + " | History length: " + historyLength;	
	if(currentSteps > historyLength) {
		return true;
	} else {		
		Common.setCookie("returnFromHold", "true", "/");	
		history.go(-currentSteps);
		return false;
	}	
}

Common.processSignOutURL = function(url) {	
	var signOutLink = document.getElementById('sign-out-link');	
	var signOutURL = url+Common.getCurrentLocationEncoded();	
	signOutLink.href = signOutURL;
}

Common.processSignInURL = function(url) {	
	var signInLink = document.getElementById('sign-in-link');			
	var signInURL = url+Common.getCurrentLocationEncoded();	
	var isSignedIn = Common.getCookie("returnFromHold");		
	if( isSignedIn == "true") {
		var serverName = (SERVER_NAME.split(":"))[0];
		if(SERVER_NAME.indexOf("localhost") != -1) {
			serverName = serverName+":7001"; // include port only if on local install
		}
		signOutURL = "http://"+serverName+"/signout?returnTo="+Common.getCurrentLocationEncoded();				
		signInLink.href = signOutURL;	
		signInLink.innerHTML = "You are signed in. <u>Sign out</u>";
		Common.deleteCookie("returnFromHold");
	} else {				
		signInLink.href = signInURL;	
	}
}