var VideoAds = function() {
	var videoAdEnd;
	var videoContent = document.getElementById('simplegameVideoContentElement');
	var adsManager;
	var adsLoader;
	var adDisplayContainer;

	this.initVideoAdArea = function(p) {
		var w, h;
		if (p == 6) {
			w = 640;
			h = 360;
		}
		else {
			w = screen.availWidth;
			h = screen.availHeight;
		}
		parent.$('#simplegameContent').hide();

		if (parent.$('#mainPageSet')[0]) {
			parent.$('#mainPageSet').width(w + 'px').height(h + 'px');
		}
		parent.$('#centerADBox').width(w + 'px').height(h + 'px');
		parent.$('#simplegameCenterAd').width(w + 'px').height(h + 'px');
		parent.$('#centerADBox').css('background', '#000');
		parent.$('#centerADBox').show();
	}

	this.init = function(adEndProc) {
		videoAdEnd = adEndProc;


		// Create the ad display container.
		createAdDisplayContainer();
		// Create ads loader.
		adsLoader = new google.ima.AdsLoader(adDisplayContainer);
		// Listen and respond to ads loaded and error events.
		adsLoader.addEventListener(google.ima.AdsManagerLoadedEvent.Type.ADS_MANAGER_LOADED, onAdsManagerLoaded, false);
		adsLoader.addEventListener(google.ima.AdErrorEvent.Type.AD_ERROR, onAdError, false);

		// Request video ads.
		var adsRequest = new google.ima.AdsRequest();
		adsRequest.adTagUrl = '';

		// Specify the linear and nonlinear slot sizes. This helps the SDK to
		// select the correct creative if multiple are returned.
		var w, h;
			w = 640;
			h = 360;
		adsRequest.linearAdSlotWidth = w;
		adsRequest.linearAdSlotHeight = h;

		adsRequest.nonLinearAdSlotWidth = w;
		adsRequest.nonLinearAdSlotHeight = h;

		adsLoader.requestAds(adsRequest);
	}
	var createAdDisplayContainer = function() {
		// We assume the adContainer is the DOM id of the element that will house
		// the ads.
		adDisplayContainer = new google.ima.AdDisplayContainer(document.getElementById('simplegameVideoAdContainer'), videoContent);
	}
	var playAds = function() {
		// Initialize the container. Must be done via a user action on mobile devices.
		videoContent.load();
		adDisplayContainer.initialize();

		try {
			var w, h;
				w = 640;
				h = 360;
			// Initialize the ads manager. Ad rules playlist will start at this time.
			adsManager.init(w, h, google.ima.ViewMode.NORMAL);
			// Call play to start showing the ad. Single video and overlay ads will
			// start at this time; the call will be ignored for ad rules.
			adsManager.start();
		} catch (adError) {
			// An error may be thrown if there was a problem with the VAST response.
			videoContent.play();
		}
	}
	var onAdsManagerLoaded = function(adsManagerLoadedEvent) {
		// Get the ads manager.
		var adsRenderingSettings = new google.ima.AdsRenderingSettings();
		adsRenderingSettings.restoreCustomPlaybackStateOnAdBreakComplete = true;
		// videoContent should be set to the content video element.
		adsManager = adsManagerLoadedEvent.getAdsManager(videoContent, adsRenderingSettings);

		// Add listeners to the required events.
		adsManager.addEventListener(google.ima.AdErrorEvent.Type.AD_ERROR, onAdError);
		adsManager.addEventListener(google.ima.AdEvent.Type.ALL_ADS_COMPLETED, onAdEvent);

		// Listen to any additional events, if necessary.
		adsManager.addEventListener(google.ima.AdEvent.Type.LOADED, onAdEvent);
		adsManager.addEventListener(google.ima.AdEvent.Type.STARTED, onAdEvent);
		adsManager.addEventListener(google.ima.AdEvent.Type.COMPLETE, onAdEvent);
		adsManager.addEventListener(google.ima.AdEvent.Type.SKIPPED, onAdEvent);
		adsManager.addEventListener(google.ima.AdEvent.Type.USER_CLOSE, onAdEvent);

		playAds();
	}
	var onAdEvent = function(adEvent) {
		// Retrieve the ad from the event. Some events (e.g. ALL_ADS_COMPLETED)
		// don't have ad object associated.
		var ad = adEvent.getAd();
		switch (adEvent.type) {
			case google.ima.AdEvent.Type.LOADED:
				// This is the first event sent for an ad - it is possible to
				// determine whether the ad is a video ad or an overlay.
				if (!ad.isLinear()) {
				// Position AdDisplayContainer correctly for overlay.
				// Use ad.width and ad.height.
					videoContent.play();
				}
				break;
			case google.ima.AdEvent.Type.COMPLETE:
			case google.ima.AdEvent.Type.SKIPPED:
			case google.ima.AdEvent.Type.USER_CLOSE:
				videoAdEnd();
				break;
		}
	}
	var onAdError = function(adErrorEvent) {
		videoAdEnd();
		// Handle the error logging.
		console.log(adErrorEvent.getError());
		if (typeof(adsManager) != "undefined") {
			adsManager.destroy();
		}
	}
}