using UnityEngine;
using Valve.VR;
using System;
using OpenVRUtil;

public class DashboardOverlay : MonoBehaviour {
    public new Camera camera;
    public RenderTexture renderTexture;
    private ulong dashboardHandle = OpenVR.k_ulOverlayHandleInvalid;
    private ulong thumbnailHandle = OpenVR.k_ulOverlayHandleInvalid;

    private void Start() {
        OpenVRUtil.System.InitOpenVR();

        (dashboardHandle, thumbnailHandle) = Overlay.CreateDashboardOverlay("f3.beamy.dash", "Beamy Panel");

        var filePath = Application.streamingAssetsPath + "/potionGroundy.png";
        Overlay.SetOverlayFromFile(thumbnailHandle, filePath);

        renderTexture = new RenderTexture(1024, 768, 16, RenderTextureFormat.ARGBFloat);
        camera.targetTexture = renderTexture;

        Overlay.SetOverlaySize(dashboardHandle, 2.5f);
        Overlay.FlipOverlayVertical(dashboardHandle);
    }

    private void Update() {
        Overlay.SetOverlayRenderTexture(dashboardHandle, renderTexture);

        var vrEvent = new VREvent_t();
        var uncbVREvent = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(VREvent_t));

        while (OpenVR.Overlay.PollNextOverlayEvent(dashboardHandle, ref vrEvent, uncbVREvent)) {
            switch ((EVREventType)vrEvent.eventType) {
                case EVREventType.VREvent_MouseButtonDown:
                    Debug.Log("MouseDown");
                    break;

                case EVREventType.VREvent_MouseButtonUp:
                    Debug.Log("MouseUp");
                    break;
            }
        }
    }

    private void OnApplicationQuit() {
        Overlay.DestroyOverlay(dashboardHandle);
    }

    private void OnDestroy() {
        OpenVRUtil.System.ShutdownOpenVR();
    }
}