/**
 * @desc: Browser checkup
 *
 * @author: Kevin Van Den Haute
 */

var $my_agent		= navigator.userAgent.toLowerCase();
var $my_version	= parseInt(navigator.appVersion);
var $is_ie			= (($my_agent.indexOf('msie') != -1) && ($my_agent.indexOf('opera') == -1));
var $is_ie7			= ($is_ie && $my_agent.indexOf('msie 7.0') != -1);
var $is_nav			= (($my_agent.indexOf('mozilla') != -1)
	&& ($my_agent.indexOf('spoofer') == -1)
	&& ($my_agent.indexOf('compatible') == -1)
	&& ($my_agent.indexOf('opera') == -1)
	&& ($my_agent.indexOf('webtv') == -1)
	&& ($my_agent.indexOf('hotjava') == -1));
var $is_opera		= (navigator.userAgent.indexOf('Opera' ) != -1);
var $is_win			= (($my_agent.indexOf('win') != -1) || ($my_agent.indexOf('16bit') != -1));
var $is_mac			= ($my_agent.indexOf('mac') != -1);

//more advanced
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent) || this.searchVersion(navigator.appVersion) || "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
		this.browserSupported = this.checkBrowserSupported();
		this.versionSupported = this.browserSupported && this.checkVersionSupported();
		
		if(!this.browserSupported || !this.versionSupported){
			this.showMessage();
		}
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	checkBrowserSupported: function(){
		var supported = false;
		for (var i=0;i<this.supportedBrowsers.length;i++){
			var browser_identity = this.supportedBrowsers[i].identity;
			if(browser_identity == this.browser){
				supported = true;
			}
		}
		return supported;
	},
	checkVersionSupported: function(){
		var supported = false;
		for (var i=0;i<this.supportedBrowsers.length;i++){
			var browser_identity = this.supportedBrowsers[i].identity;
			if(browser_identity == this.browser){
				var browser_version = this.supportedBrowsers[i].version;
				if(this.version >= browser_version){
					supported = true;
				}
			}
		}
		return supported;
	},
	showMessage: function(){
		var template = new Template(lang_text('browser_info'));
		var msg = template.evaluate(this);
		var div = Builder.node('div', {id: "browser_info"}).update(msg).setStyle({padding: "10px", margin:"10px 0px 10px 0px", display: "none"});
		div.className = "msg info";
		$$('#content_column_2 .column div')[0].parentNode.insertBefore(div,$$('#content_column_2 .column div')[0]);
		Effect.BlindDown('browser_info', {duration: 0.6});
		Effect.Fade('browser_info', {from: 0, to: 1, duration: 0.9});
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			   string: navigator.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	],
	supportedBrowsers : [
		{
			identity : "Chrome",
			version : 4.0
		},
		{
			identity : "Firefox",
			version : 3.0
		},
		{
			identity : "Explorer",
			version : 7.0
		},
		{
			identity : "Safari",
			version : 3.0
		},
		{
			identity : "Opera",
			version : 9.0
		},
		{
			identity : "OmniWeb",
			version : 5.0
		}
	]

};
Event.observe(window,'load', function(){BrowserDetect.init()});