// necessary detection (fixes for <IE9)
mejs.MediaFeatures = {
	init: function() {
		var
			t = this,
			d = document,
			nav = mejs.PluginDetector.nav,
			ua = mejs.PluginDetector.ua.toLowerCase(),
			i,
			v,
			html5Elements = ['source','track','audio','video'];

		// detect browsers (only the ones that have some kind of quirk we need to work around)
		t.isiPad = (ua.match(/ipad/i) !== null);
		t.isiPhone = (ua.match(/iphone/i) !== null);
		t.isiOS = t.isiPhone || t.isiPad;
		t.isAndroid = (ua.match(/android/i) !== null);
		t.isBustedAndroid = (ua.match(/android 2\.[12]/) !== null);
		t.isBustedNativeHTTPS = (location.protocol === 'https:' && (ua.match(/android [12]\./) !== null || ua.match(/macintosh.* version.* safari/) !== null));
		t.isIE = (nav.appName.toLowerCase().indexOf("microsoft") != -1 || nav.appName.toLowerCase().match(/trident/gi) !== null);
		t.isChrome = (ua.match(/chrome/gi) !== null);
		t.isFirefox = (ua.match(/firefox/gi) !== null);
		t.isWebkit = (ua.match(/webkit/gi) !== null);
		t.isGecko = (ua.match(/gecko/gi) !== null) && !t.isWebkit && !t.isIE;
		t.isOpera = (ua.match(/opera/gi) !== null);
		t.hasTouch = ('ontouchstart' in window); //  && window.ontouchstart != null); // this breaks iOS 7
		
		// borrowed from Modernizr
		t.svg = !! document.createElementNS &&
				!! document.createElementNS('http://www.w3.org/2000/svg','svg').createSVGRect;

		// create HTML5 media elements for IE before 9, get a <video> element for fullscreen detection
		for (i=0; i<html5Elements.length; i++) {
			v = document.createElement(html5Elements[i]);
		}
		
		t.supportsMediaTag = (typeof v.canPlayType !== 'undefined' || t.isBustedAndroid);

		// Fix for IE9 on Windows 7N / Windows 7KN (Media Player not installer)
		try{
			v.canPlayType("video/mp4");
		}catch(e){
			t.supportsMediaTag = false;
		}

		// detect native JavaScript fullscreen (Safari/Firefox only, Chrome still fails)
		
		// iOS
		t.hasSemiNativeFullScreen = (typeof v.webkitEnterFullscreen !== 'undefined');
		
		// W3C
		t.hasNativeFullscreen = (typeof v.requestFullscreen !== 'undefined');
		
		// webkit/firefox/IE11+
		t.hasWebkitNativeFullScreen = (typeof v.webkitRequestFullScreen !== 'undefined');
		t.hasMozNativeFullScreen = (typeof v.mozRequestFullScreen !== 'undefined');
		t.hasMsNativeFullScreen = (typeof v.msRequestFullscreen !== 'undefined');
		
		t.hasTrueNativeFullScreen = (t.hasWebkitNativeFullScreen || t.hasMozNativeFullScreen || t.hasMsNativeFullScreen);
		t.nativeFullScreenEnabled = t.hasTrueNativeFullScreen;
		
		// Enabled?
		if (t.hasMozNativeFullScreen) {
			t.nativeFullScreenEnabled = document.mozFullScreenEnabled;
		} else if (t.hasMsNativeFullScreen) {
			t.nativeFullScreenEnabled = document.msFullscreenEnabled;		
		}
		
		if (t.isChrome) {
			t.hasSemiNativeFullScreen = false;
		}
		
		if (t.hasTrueNativeFullScreen) {
			
			t.fullScreenEventName = '';
			if (t.hasWebkitNativeFullScreen) { 
				t.fullScreenEventName = 'webkitfullscreenchange';
				
			} else if (t.hasMozNativeFullScreen) {
				t.fullScreenEventName = 'mozfullscreenchange';
				
			} else if (t.hasMsNativeFullScreen) {
				t.fullScreenEventName = 'MSFullscreenChange';
			}
			
			t.isFullScreen = function() {
				if (v.mozRequestFullScreen) {
					return d.mozFullScreen;
				
				} else if (v.webkitRequestFullScreen) {
					return d.webkitIsFullScreen;
				
				} else if (v.hasMsNativeFullScreen) {
					return d.msFullscreenElement !== null;
				}
			}
					
			t.requestFullScreen = function(el) {
		
				if (t.hasWebkitNativeFullScreen) {
					el.webkitRequestFullScreen();
					
				} else if (t.hasMozNativeFullScreen) {
					el.mozRequestFullScreen();

				} else if (t.hasMsNativeFullScreen) {
					el.msRequestFullscreen();

				}
			}
			
			t.cancelFullScreen = function() {				
				if (t.hasWebkitNativeFullScreen) {
					document.webkitCancelFullScreen();
					
				} else if (t.hasMozNativeFullScreen) {
					document.mozCancelFullScreen();
					
				} else if (t.hasMsNativeFullScreen) {
					document.msExitFullscreen();
					
				}
			}	
			
		}
		
		
		// OS X 10.5 can't do this even if it says it can :(
		if (t.hasSemiNativeFullScreen && ua.match(/mac os x 10_5/i)) {
			t.hasNativeFullScreen = false;
			t.hasSemiNativeFullScreen = false;
		}
		
	}
};
mejs.MediaFeatures.init();
