"use strict";

//
//  hmd.js
//  scripts/system/
//
//  Created by Howard Stearns on 2 Jun 2016
//  Copyright 2016 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

(function() { // BEGIN LOCAL_SCOPE

var headset; // The preferred headset. Default to the first one found in the following list.
var displayMenuName = "Display";
var desktopMenuItemName = "Desktop";
['OpenVR (Vive)', 'Oculus Rift'].forEach(function (name) {
    if (!headset && Menu.menuItemExists(displayMenuName, name)) {
        headset = name;
    }
});

var controllerDisplay = false;
function updateControllerDisplay() {
    if (HMD.active && Menu.isOptionChecked("Third Person")) {
        if (!controllerDisplay) {
            HMD.requestShowHandControllers();
            controllerDisplay = true;
        }
    } else if (controllerDisplay) {
        HMD.requestHideHandControllers();
        controllerDisplay = false;
    }
}

var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");
var button;
// Independent and Entity mode make people sick. Third Person and Mirror have traps that we need to work through.
// Disable them in hmd.
var desktopOnlyViews = ['Mirror', 'Independent Mode', 'Entity Mode'];
function onHmdChanged(isHmd) {
    //TODO change button icon when the hmd changes
    desktopOnlyViews.forEach(function (view) {
        Menu.setMenuEnabled("View>" + view, !isHmd);
    });
    updateControllerDisplay();
}
function onClicked(){
    var isDesktop = Menu.isOptionChecked(desktopMenuItemName);
    Menu.setIsOptionChecked(isDesktop ? headset : desktopMenuItemName, true);
}
if (headset) {
    button = tablet.addButton({
        text: "SWITCH"
    });
    onHmdChanged(HMD.active);

    button.clicked.connect(onClicked);
    HMD.displayModeChanged.connect(onHmdChanged);
    Camera.modeUpdated.connect(updateControllerDisplay);

    Script.scriptEnding.connect(function () {
        button.clicked.disconnect(onClicked);
        tablet.removeButton(button);
        HMD.displayModeChanged.disconnect(onHmdChanged);
        Camera.modeUpdated.disconnect(updateControllerDisplay);
    });
}

}()); // END LOCAL_SCOPE