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

namespace Demo.Game
{
    public class ParticleEffect : IEffectHookObject, IAssetBundleLoader
    {
        public static ParticleEffect Make()
        {
            return new GameObject().AddComponent<ParticleEffect>();
        }

        private List<IEnumerator> AssetBundleLoadings = new();
        private List<string> AssetBundles = new();
        private List<GameObject> Prefabs = new();

        public override IEnumerator LoadScript(string script)
        {
            yield return base.LoadScript(script);
            foreach (var loading in AssetBundleLoadings)
            {
                yield return loading;
            }
        }

        public override IEnumerator UnloadScript()
        {
            yield return base.UnloadScript();
            foreach (var ab in AssetBundles)
            {
                yield return this.UnloadAssetBundle(ab);
            }
        }

        /// <summary>
        /// 加载预制体作为子物体
        /// </summary>
        /// <param name="ab"></param>
        /// <param name="prefab"></param>
        [ScriptableCall(@"
<summary>
加载预制体作为子物体
</summary>
<param name=""ab""></param>
<param name=""prefab""></param>
")]
        public void Load(string ab, string prefab)
        {
            AssetBundleLoadings.Add(this.LoadAssetBundle(ab, x =>
            {
                GameObject sub = Instantiate(x.LoadAsset<GameObject>(prefab));
                sub.SetActive(false);
                Prefabs.Add(sub);
                sub.transform.SetParent(transform);
                sub.transform.localPosition = Vector3.zero;
                AssetBundles.Add(ab);
            }));
        }

        public override void OnBegin()
        {
            foreach (var child in Prefabs)
            {
                child.SetActive(true);
            }
        }

        public override void OnEnd()
        {
            foreach (var child in Prefabs)
            {
                child.SetActive(false);
            }
        }
    }
}