using System.Collections.Generic;
using UnityEngine;

namespace Thousandto.SkillEditor.Support
{
    public class EditorVFXPlayer
    {
        private const string VFXRootName = "[VFXRoot]";
        private Transform _root = null;
        private List<EditorVFXScript> _vfxs = new List<EditorVFXScript>();

        private static EditorVFXPlayer _instance = null;

        public static EditorVFXPlayer Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = new EditorVFXPlayer();
                    var rootGo = GameObject.Find(VFXRootName);
                    if (rootGo == null)
                    {
                        rootGo = new GameObject(VFXRootName);
                        GameObject.DontDestroyOnLoad(rootGo);
                        _instance._root = rootGo.transform;
                    }
                }
                return _instance;
            }
        }

        public EditorVFXScript PlayVFX(string path, Transform root = null)
        {
            if (root == null)
            {
                root = _root;
            }

            var vfx = EditorVFXLoader.Load(path);
            if (vfx != null)
            {
                vfx.transform.parent = root;
                vfx.transform.localPosition = Vector3.zero;
                vfx.transform.localRotation = Quaternion.identity;
                vfx.transform.localScale = Vector3.one;
                vfx.Play();
                _vfxs.Add(vfx);
            }
            return vfx;
        }

        public void StopAll()
        {
            for (int i = _vfxs.Count - 1; i >= 0; --i)
            {
                var vfx = _vfxs[i];
                vfx.Stop();
            }
        }

        public void Update()
        {
            for (int i = _vfxs.Count - 1; i >= 0; --i)
            {
                var vfx = _vfxs[i];
                vfx.UpdateVFX();
                if (vfx.IsEnd)
                {
                    _vfxs.RemoveAt(i);
                    GameObject.DestroyImmediate(vfx.gameObject);
                }
            }
        }
    }
}