using UnityEngine;
using System.Collections;

namespace AX.DevelopEngine
{
    /// <summary>
    /// 有DontDestroyOnLoad属性的单例泛型模板
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>
    {
        private static T instance = null;
        public static T Instance
        {
            get
            {
                if (instance == null)
                {
                    instance = FindObjectOfType(typeof(T)) as T;
                    if (instance == null)
                    {
                        instance = new GameObject("_" + typeof(T).Name).AddComponent<T>();
                    }
                    DontDestroyOnLoad(instance);
                }
                return instance;
            }
        }

        void OnApplicationQuit() { if (instance != null) instance = null; }

        public static T CreateInstance()
        {
            if (Instance != null) Instance.OnCreate();
            return Instance;
        }

        protected virtual void OnCreate()
        {

        }

        public static bool InstanceNull()
        {
            if (instance == null) return true;
            return false;
        }
    }
    /// <summary>
    /// 无DontDestroyOnLoad属性的单例泛型模板
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class SingletonMono<T> : MonoBehaviour where T : SingletonMono<T>
    {
        private static T instance = null;
        public static T Instance
        {
            get
            {
                if (instance == null)
                {
                    instance = FindObjectOfType(typeof(T)) as T;//只能获取激活的物体
                    if (instance == null)
                    {
                        instance = new GameObject("_" + typeof(T).Name).AddComponent<T>();
                        //DontDestroyOnLoad(instance);
                    }
                    //if (instance == null)
                    //    Console.LogError("Failed to create instance of " + typeof(T).FullName + ".");
                }
                return instance;
            }
        }

        void OnApplicationQuit() { if (instance != null) instance = null; }

        public static T CreateInstance()
        {
            if (Instance != null) Instance.OnCreate();
            return Instance;
        }

        protected virtual void OnCreate()
        {

        }
    }

    
}