/*globals window,document, navigator, SA */

	if (!window.SA) {window.SA = {};}

    /*
	 * @param config containing two fields: param (parameter to be passed to avoid
	 *             mobile redirection), mobile_prefix (prefix appended to the 
	 *             hostname), cookie_hours (number of hours cookie needs to exist after
	 *			redirection to desktop site)
	*/
	SA.redirection_mobile = function(config) {

		// Helper function
		var addTimeToDate = function(msec) {

			// Get the current date
			var exdate = new Date();

			// Add time to the date
			exdate.setTime(exdate.getTime() + msec);

			//Return the new Date
			return exdate;

		};

		// Retrieve the User Agent of the browser
		
		var agent = navigator.userAgent.toLowerCase(),

			// param value or default value
			param = config.param || "isStandardSite",

			// Constant
			TRUE = "true",

			// "m" is the default mobile hostname prefix 
			mobile_prefix = config.mobile_prefix || "m",

			// URL host of incoming request
		    host = document.location.host,

			// Compose the mobile hostname
			//mobile_host = mobile_prefix + "." + 
			//				(!!host.match(/^www\./i) ?
			//					host.substring(4) : 
			//						host),
		    
		    mobile_host = "www.mdex.my/mdex/mobile"

			// Expiry hours for cookie
			cookie_hours = config.cookie_hours || 1,

			// Check if the UA is a mobile one (iphone, ipod, ipad, android, blackberry or others)
	//		isUAMobile = !!agent.matches(".*(android|avantgo|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|symbian|treo|up\\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino).*")||ua.substring(0,4).matches("1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\\-(n|u)|c55\\/|capi|ccwa|cdm\\-|cell|chtm|cldc|cmd\\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\\-s|devi|dica|dmob|do(c|p)o|ds(12|\\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\\-|_)|g1 u|g560|gene|gf\\-5|g\\-mo|go(\\.w|od)|gr(ad|un)|haie|hcit|hd\\-(m|p|t)|hei\\-|hi(pt|ta)|hp( i|ip)|hs\\-c|ht(c(\\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\\-(20|go|ma)|i230|iac( |\\-|\\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\\/)|klon|kpt |kwc\\-|kyo(c|k)|le(no|xi)|lg( g|\\/(k|l|u)|50|54|e\\-|e\\/|\\-[a-w])|libw|lynx|m1\\-w|m3ga|m50\\/|ma(te|ui|xo)|mc(01|21|ca)|m\\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\\-2|po(ck|rt|se)|prox|psio|pt\\-g|qa\\-a|qc(07|12|21|32|60|\\-[2-7]|i\\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\\-|oo|p\\-)|sdk\\/|se(c(\\-|0|1)|47|mc|nd|ri)|sgh\\-|shar|sie(\\-|m)|sk\\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\\-|v\\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\\-|tdg\\-|tel(i|m)|tim\\-|t\\-mo|to(pl|sh)|ts(70|m\\-|m3|m5)|tx\\-9|up(\\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|xda(\\-|2|g)|yas\\-|your|zeto|zte\\-")
	
			
			
			isUAMobile = !!(agent.match(/iPhone/i) || agent.match(/iPod/i) || 
			              agent.match(/iPad/i) || agent.match(/blackberry/i) || 
						   agent.match(/android/i));
			

		// Check if the referrer was a mobile page of the site
		// (in that case we need to set a variable in the sessionStorage or in the cookie)
		if (document.referrer.indexOf(mobile_host) >= 0) {
			if (window.sessionStorage) {
				window.sessionStorage.setItem(param, TRUE);
			} else {
				document.cookie = param + "=" + TRUE + ";expires="+
													addTimeToDate(3600*1000*cookie_hours).toUTCString();
			}
		}

		// Check if the sessionStorage contain the parameter
		var isSessionStorage = (window.sessionStorage) ? 
								(window.sessionStorage.getItem(param) === TRUE) :
								 false,

			// Check if the Cookie has been set up
			isCookieSet = document.cookie ? 
							(document.cookie.indexOf(param) >= 0) :
								false;

		// Check that User Agent is mobile, cookie is not set or value in the sessionStorage not present
		if (isUAMobile && !(isCookieSet || isSessionStorage)) {
		   document.location.href = document.location.protocol + "//" + mobile_host;
		} 
	};