/**
 * Same logic as before. Have removed some detection capabilities in an effort
 * to reduce reliance on browser detection in general.
 * 
 * If there is a particualr detection you feel you need please file a ticket
 * with the request or add the detection yourself with the exact reason you
 * need said detection. Hopefully we'll be able to keep the number of
 * detection utility functions to a minimum in favor of behavioral testing.
 * 
 * This may also be the place for very common behavioral functions.
 * 
 */

function UADetector () {
	
}

Class(UADetector);

UADetector.prototype.getAgent = function () {
	return navigator.userAgent.toLowerCase();
}

// detect platform
UADetector.prototype.isMac = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/mac/i);
}

UADetector.prototype.isWin = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/win/i);
}

UADetector.prototype.isWin2k = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return this.isWin(agent) && (agent.match(/nt\s*5/i));
}

UADetector.prototype.isWinVista = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return this.isWin(agent) && (agent.match(/nt\s*6/i));
}

// detect browser
UADetector.prototype.isWebKit = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/AppleWebKit/i);
}

UADetector.prototype.isOpera = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/opera/i);
}

UADetector.prototype.isIE = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/msie/i);
}

UADetector.prototype.isIEStrict = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/msie/i) && !this.isOpera(agent);
}

UADetector.prototype.getIEVer = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return this.isIE(agent) && Number(agent.match(/\s[0-9]/i));
}

UADetector.prototype.isFirefox = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/firefox/i);
}

UADetector.prototype.isiPhone = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return agent.match(/iPhone/i);
}

// itunes compabibility
UADetector.prototype.isiTunesOK = function (userAgent) {
	var agent = userAgent || this.getAgent();
	return this.isMac(agent) || this.isWin2k(agent);
}

UADetector.prototype.isQTInstalled = function () {
	
	var qtInstalled = false;
	
	if(navigator.plugins && navigator.plugins.length) {
		
		for(var i=0; i < navigator.plugins.length; i++ ) {
			
			var plugin = navigator.plugins[i];
			
			if(plugin.name.indexOf("QuickTime") > -1) { 
				qtInstalled = true; 
			}
		}
	} else {
		qtObj = false; //global variable written to by vbscript for ie
		execScript('on error resume next: qtObj = IsObject(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1"))','VBScript');
		qtInstalled = qtObj;
	}
	
	return qtInstalled;
}

UADetector.prototype.getQTVersion = function () {
	
	var version = "0";
	
	if (navigator.plugins && navigator.plugins.length) {
		for (var i = 0; i < navigator.plugins.length; i++) {
			
			var plugin = navigator.plugins[i];
			
			//Match: QuickTime Plugin X.Y.Z
			var match = plugin.name.match(/quicktime\D*([\.\d]*)/i);
			if (match && match[1]) {
				version = match[1];
			}
		}
	} else {
		ieQTVersion = null; //global for vbscript to write to
		
		execScript('on error resume next: ieQTVersion = (Hex(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1").QuickTimeVersion)/1000000)','VBScript');

		if (ieQTVersion) {
			//only grab the major version:  7.xyz => 7
			version = (ieQTVersion +"").split(/\./)[0];
		}
	}
	
	return version;
}

UADetector.prototype.isQTCompatible = function (required, actual) {
	
	function areCompatible(required, actual) {
		
		var requiredValue = parseInt(required[0])
		if (isNaN(requiredValue)) {
			requiredValue = 0;
		}
		
		var actualValue = parseInt(actual[0])
		if (isNaN(actualValue)) {
			actualValue = 0;
		}
		
		if (requiredValue == actualValue) {
			if (required.length > 1) {
				return areCompatible(required.slice(1), actual.slice(1));
			} else {
				return true;
			}
		} else if (requiredValue < actualValue) {
			return true;
		} else {
			return false;
		}
	}

	var expectedVersion = required.split(/\./);
	var actualVersion = actual ? actual.split(/\./) : this.getQTVersion().split(/\./);
	
	return areCompatible(expectedVersion, actualVersion);
	
}

UADetector.prototype.isValidQTAvailable = function (required) {
	return this.isQTInstalled() && this.isQTCompatible(required)
}