// %BANNER_BEGIN%
// ---------------------------------------------------------------------
// %COPYRIGHT_BEGIN%
// Copyright (c) 2022-2023 Magic Leap, Inc. All Rights Reserved.
// Use of this file is governed by the Magic Leap 2 Software License Agreement, located here: https://www.magicleap.com/software-license-agreement-ml2  
// Terms and conditions applicable to third-party materials accompanying this distribution may also be found in the top-level NOTICE file appearing herein.
// %COPYRIGHT_END%
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// %BANNER_END%

using System.Collections;
using System.Linq;
using UnityEngine;

namespace MagicLeap.Spectator
{
    public class MLSpectatorMarker : MonoBehaviour
    {
        private bool destroy = false;

        public void FadeAway(float after, float over)
        {
            StartCoroutine(Fade(after, over));
        }

        private void OnDisable()
        {
            Debug.Log($"MLSpectatorMarker: OnDisable()");

            if (destroy) return;
            destroy = true;

            Destroy(gameObject);
        }

        private void OnDestroy()
        {
            Debug.Log($"MLSpectatorMarker: OnDestroy()");
        }

        private IEnumerator Fade(float after, float over)
        {
            var mrs = gameObject.GetComponentsInChildren<MeshRenderer>();

            if (mrs == null || mrs.Length == 0)
            {
                Debug.LogWarning($"MLSpectatorMarker: Fade() - No mesh renderer found");
                yield return new WaitForSeconds(after + over);
                enabled = false;
                yield break;
            }
            //else Debug.LogWarning($"MLSpectatorMarker: Fade() - Found {mrs.Length} mesh renderer(s)");

            Debug.Log($"MLSpectatorMarker: Fade() - Waiting for {after} seconds");
            yield return new WaitForSeconds(after);

            var startColors = mrs.Select(x => x.material.color).ToArray();

            Debug.Log($"MLSpectatorMarker: Fade() - Fading start");
            for (float t = 0; t < over; t += Time.deltaTime)
            {
                for (int i = 0; i < mrs.Length; ++i)
                {
                    mrs[i].material.color = Color.Lerp(startColors[i], Color.clear, t / over);
                }

                yield return null;
            }
            Debug.Log($"MLSpectatorMarker: Fade() - Fading end");
            enabled = false;
        }
    }
}