using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class WorldSpaceSlideshow : MonoBehaviour
{
    public Texture[] images;             // Assign your 5 images here
    public float fadeDuration = 1.5f;    // Duration of fade
    public float displayDuration = 3f;   // How long each image is shown

    private RawImage rawImage;
    private int currentIndex = 0;
    private int nextIndex = 1;
    private float alpha = 0f;

    private void Start()
    {
        rawImage = GetComponent<RawImage>();
        rawImage.color = new Color(1, 1, 1, 0);
        StartCoroutine(Slideshow());
    }

    IEnumerator Slideshow()
    {
        while (true)
        {
            Texture currentTex = images[currentIndex];
            Texture nextTex = images[nextIndex];

            // Fade in current image
            rawImage.texture = currentTex;
            yield return Fade(0, 1);

            // Wait while image is fully visible
            yield return new WaitForSeconds(displayDuration);

            // Fade out current image
            yield return Fade(1, 0);

            // Prepare next indices
            currentIndex = nextIndex;
            nextIndex = (nextIndex + 1) % images.Length;
        }
    }

    IEnumerator Fade(float from, float to)
    {
        float t = 0;
        while (t < fadeDuration)
        {
            t += Time.deltaTime;
            float normalized = t / fadeDuration;
            alpha = Mathf.Lerp(from, to, normalized);
            rawImage.color = new Color(1, 1, 1, alpha);
            yield return null;
        }
        rawImage.color = new Color(1, 1, 1, to);
    }
}