using UnityEngine;

namespace Plugins.CxShine.Singleton
{
    public class UnitySingleton<T> : MonoBehaviour
        where T : Component
    {
        private static T _instance;

        public static T Instance
        {
            get
            {
                if (_instance == null)
                {
                    // 利用反射创建 Unity 物体
                    _instance = FindObjectOfType(typeof(T)) as T;
                    if (_instance == null)
                    {
                        var obj = new GameObject();
                        // 利用反射创建 Unity 组件
                        _instance = obj.AddComponent(typeof(T)) as T;
                    }
                }

                return _instance;
            }
        }

        public virtual void Awake()
        {
            DontDestroyOnLoad(gameObject);
            if (_instance == null)
                _instance = this as T;
            else
            {
                Destroy(gameObject);
            }
        }


        public static void RemoveTransformAllChild(Transform tr)
        {
            for (int i = 0; i < tr.childCount; i++)
            {
                tr.GetChild(i).gameObject.SetActive(false);
                Destroy(tr.GetChild(i).gameObject);
            }
        }
    }
}