using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using UnityEngine.UI;
using Oculus.Platform;

public class Screenshot : MonoBehaviour
{
    [SerializeField]
    RawImage _previewImg;

    GameObject XRCamera; //the XR Player Camera, named "Main Camera"
    GameObject XRHoloVideoCamera; //the XR Player Camera, named "Main Camera no-post-processing"
    GameObject SmartphoneCaptureCamera; //the GameObject, named "SmartphoneCaptureCamera" is a Camera with a CullingMask where the Layer "hands" is excluded ("_HANDMENU" and "XR Interactions Hands Setup" are on the "hands" layer)

    // Update is called once per frame
    void Update()
    {
        //StartCoroutine(TakeScreenshot());

        /*       if (Input.GetKeyDown(KeyCode.P))
               {
                   StartCoroutine(TakeScreenshot());
               }
        */
    }

    public void OnClickTakeScreenshot()
    {
        StartCoroutine(TakeScreenshot());
    }

    public void OnClickPreview()
    {
        StartCoroutine(CreatePreview());
    }

    public void DestroyPreviewTexture()
    {
        if (_previewImg.texture == true)
        {
            Destroy(_previewImg.texture);
        }
    }

    IEnumerator TakeScreenshot()
    {
        yield return new WaitForEndOfFrame();
        string timpStamp = DateTime.Now.ToString("ddMMyyyyHHmmssffff");
        ScreenCapture.CaptureScreenshot("snapshot_" + timpStamp + ".png");
    }

    IEnumerator CreatePreview()
    {
        yield return new WaitForEndOfFrame();

        // find all Cameras:
        XRCamera = GameObject.Find("Main Camera");
        XRHoloVideoCamera = GameObject.Find("Main Camera no-post-processing");
        SmartphoneCaptureCamera = GameObject.Find("SmartphoneCaptureCamera");

        // get the Camera components:
        Camera vrcam = XRCamera.GetComponent<Camera>();
        Camera vrcamnopost = XRHoloVideoCamera.GetComponent<Camera>();
        Camera capturecam = SmartphoneCaptureCamera.GetComponent<Camera>();

        // switch active Cameras
        vrcam.enabled = false;
        vrcamnopost.enabled = false;
        capturecam.enabled = true;

        // call the function to take actual screenshot
        _previewImg.texture = ScreenCapture.CaptureScreenshotAsTexture();

        // switch active Cameras back
        vrcam.enabled = true;
        vrcamnopost.enabled = true;
        capturecam.enabled = false;
    }
}