(function() { // BEGIN LOCAL_SCOPE

	var uiQml = Script.resolvePath("slack_beta.qml");
	var toolIconUrl = Script.resolvePath("app-win10_0000.svg");
	
	var toolHeight = 50;
	var toolWidth = 50;
	var TOOLBAR_MARGIN_Y = 0;
	var slackVisible = false;
	var slackWebTablet;
	
	// We persist clientOnly data in the .ini file, and reconsistitute it on restart.
	// To keep things consistent, we pickle the tablet data in Settings, and kill any existing such on restart and domain change.
	var persistenceKey = "io.highfidelity.lastDomainTablet";

	var slackWindow = new OverlayWindow({
		title: 'Slack',
		source: uiQml,
		width: 800,
		height: 800,
		visible: false
	});

	var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");

	function shouldShowWebTablet() {
		var rightPose = Controller.getPoseValue(Controller.Standard.RightHand);
		var leftPose = Controller.getPoseValue(Controller.Standard.LeftHand);
		var hasHydra = !!Controller.Hardware.Hydra;
		return HMD.active && (leftPose.valid || rightPose.valid || hasHydra);
	}

	function showSlack() {
		slackWindow.visible = true;
		print("SHOWING");
		slackVisible = true;
	}

	function hideTablet(tablet) {
		if (!tablet) {
			return;
		}
		updateButtonState(false);
		tablet.unregister();
		tablet.destroy();
		slackWebTablet = null;
		Settings.setValue(persistenceKey, "");
	}
	function clearOldTablet() { // If there was a tablet from previous domain or session, kill it and let it be recreated

	}
	function hideSlack() {
		print("HIDING");
		if (slackWindow.visible) {
			slackWindow.visible = false;
			//slackWindow.setURL("about:blank");
		} else if (slackWebTablet) {

		}
		slackVisible = false;
	}

	function toggleSlack() {
		if (slackVisible) {
			hideSlack();
		} else {
			showSlack();
		}
	}

	var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");

	var browseExamplesButton = tablet.addButton({
		icon: toolIconUrl,
		activeIcon: toolIconUrl,
		text: "SLACK"
	});

	function updateButtonState(visible) {

	}
	function onslackWindowVisibilityChanged() {
		updateButtonState(slackWindow.visible);
		slackVisible = slackWindow.visible;
	}

	function onClick() {
		toggleSlack();
	}

	browseExamplesButton.clicked.connect(onClick);
	slackWindow.visibleChanged.connect(onslackWindowVisibilityChanged);

	clearOldTablet(); // Run once at startup, in case there's anything laying around from a crash.
	// We could also optionally do something like Window.domainChanged.connect(function () {Script.setTimeout(clearOldTablet, 2000)}),
	// but the HUD version stays around, so lets do the same.

	Script.scriptEnding.connect(function () {
		browseExamplesButton.clicked.disconnect(onClick);
		tablet.removeButton(browseExamplesButton);
		slackWindow.visibleChanged.disconnect(onslackWindowVisibilityChanged);
	});
}()); // END LOCAL_SCOPE