using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TextureGenerator : MonoBehaviour
{
    public float NoiseStrength;
    [SerializeField] private Renderer outputRenderer;
    private Texture2D targetTexture;
    private WebCamTexture webCamTexture;

    private Color[] previousFrame;

    private void Start()
    {

        webCamTexture = new WebCamTexture();
        webCamTexture.Play();
        targetTexture = new Texture2D(webCamTexture.width, webCamTexture.height);
        outputRenderer.material.mainTexture = targetTexture;
    }

    private void Update()
    {
        Color[] pixels = webCamTexture.GetPixels();
        Color[] output = new Color[pixels.Length];

        if(previousFrame != null)
        {
            int totalMotion = 0;
            int index = 0;
            for (int pixelY = 0; pixelY < webCamTexture.height; pixelY++)
            {
                for (int pixelX = 0; pixelX < webCamTexture.width; pixelX++)
                {
                    //int readX = Mathf.FloorToInt(pixelX + Mathf.Sin(pixelY * 0.1f) * NoiseStrength);
                    //Color color = pixels[index] - previousFrame[index]; Geke zwarte
                    float motion = Mathf.Abs(pixels[index].maxColorComponent- previousFrame[index].maxColorComponent);
                    //targetTexture.SetPixel(pixelX, pixelY, color);
                    output[index] = (motion > 0.04f)?Color.black:Color.white;
                    if((motion > 0.02f))
                    {
                        totalMotion++;
                    }
                    index++;
                }
            }
            targetTexture.SetPixels(output);
            targetTexture.Apply();
            Debug.Log("Total motion = " + totalMotion);
        }

        previousFrame = pixels;

    }

    private Texture2D GenerateTexture()
    {
        Texture2D texture = new Texture2D(512, 512);
        for (int pixelY = 0; pixelY < texture.height; pixelY++)
        {
            for (int pixelX = 0; pixelX < texture.width; pixelX++)
            {
                float v = pixelY / (float)texture.height;
                float u = pixelX / (float)texture.width;

                float c = (Mathf.Floor(v * 5) + Mathf.Floor(u * 5)) % 2;

                Color color = new Color(c, c, c);
                texture.SetPixel(pixelX, pixelY, color);
            }
        }
        texture.Apply();
        return texture;

    }

}