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

public class Beamy : MonoBehaviour {
    public new Camera camera;
    private RenderTexture renderTexture;
    public ETrackedControllerRole targetHand = ETrackedControllerRole.RightHand;

    private ulong overlayHandle = OpenVR.k_ulOverlayHandleInvalid;

    [Range(0, 0.5f)] public float size = 0.5f;
    [Range(-0.2f, 0.2f)] public float x;
    [Range(-0.2f, 0.2f)] public float y;
    [Range(-0.2f, 0.2f)] public float z;
    [Range(0, 360)] public int rotationX;
    [Range(0, 360)] public int rotationY;
    [Range(0, 360)] public int rotationZ;

    private void Start() {
        OpenVRUtil.System.InitOpenVR();
        overlayHandle = Overlay.CreateOverlay("f3.beamy", "Beamy");

        //Vertically flip the renderTexture for non-OpenGL environments
        Overlay.FlipOverlayVertical(overlayHandle);  
        // Set camera.targetTexture to write the camera output to the render texture.
        renderTexture = new RenderTexture(512, 512, 16, RenderTextureFormat.ARGBFloat);
        camera.targetTexture = renderTexture;

        Overlay.SetOverlaySize(overlayHandle, size);
        Overlay.ShowOverlay(overlayHandle);
    }

    private void Update() {
        var position = new Vector3(x, y, z);
        var rotation = Quaternion.Euler(rotationX, rotationY, rotationZ); 
        // SetOverlaySize(overlayHandle, size);
    
        // var position = new Vector3(x, y, z);
        // var rotation = Quaternion.Euler(rotationX, rotationY, rotationZ); 
        // var rightControllerIndex = OpenVR.System.GetTrackedDeviceIndexForControllerRole(ETrackedControllerRole.RightHand);
        // if (rightControllerIndex != OpenVR.k_unTrackedDeviceIndexInvalid) {
        //     SetOverlayTransformRelative(overlayHandle, rightControllerIndex, position, rotation);
        // }

        var controllerIndex = OpenVR.System.GetTrackedDeviceIndexForControllerRole(targetHand);
        if (controllerIndex != OpenVR.k_unTrackedDeviceIndexInvalid) {
            Overlay.SetOverlayTransformRelative(overlayHandle, controllerIndex, position, rotation);
        }

        if (!renderTexture.IsCreated()) {
            return;
        }
        Overlay.SetOverlayRenderTexture(overlayHandle, renderTexture);
    }

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

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