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

namespace Gameplay
{
    /// <summary>
    /// 更新类型
    /// </summary>
    public enum EActionType
    {
        UPDATE,
        LATE_UPDATE,
        FIXED_UPDATE,
        /// <summary>
        /// 离开application
        /// </summary>
        ON_PAUSE_FALSE,
        /// <summary>
        /// 回到application
        /// </summary>
        ON_PAUSE_TRUE,
        Destory,
        SCREEN_SIZE_CHANGE,
    }

    /// <summary>
    /// 反射工程内用的update辅助类
    /// author:liutao
    /// </summary>
    [DefaultExecutionOrder(-99)]
    public class MonoHelper : MonoBehaviour
    {

        public const string TAG = "[monohelper]";

        public static MonoHelper instance
        {
            get
            {
                if (_instance == null)
                {
#if UNITY_EDITOR
                    if (!UnityEditor.EditorApplication.isPlaying)
                    {
                        return null;
                    }
#endif
                    DebugUtil.Log("{0} 自动创建MonoHelper", TAG);
                    var newObj = new GameObject("MonoHelper");
                    _instance = newObj.AddComponent<MonoHelper>();
                }
                return _instance;
            }
        }
        private static MonoHelper _instance;

        public int m_UpdateCount;
        public int m_LateUpdateCount;
        public int m_FixedUpdateCount;

        private List<Action> _onUpdate;
        private List<Action> _onLateUpdate;
        private List<Action> _onFixedUpdate;
        private List<Action> _onDestory;
        private List<Action> _onPauseFalse;
        private List<Action> _onPauseTrue;
        private List<Action> _onScreenSizeChanged;

        public float deltaTime;

        private int _xSize;
        private int _ySize;

        private void Awake()
        {
            this.deltaTime = Time.deltaTime;

            _xSize = Screen.width;
            _ySize = Screen.height;

            _onUpdate = new List<Action>();
            _onLateUpdate = new List<Action>();
            _onFixedUpdate = new List<Action>();
            _onDestory = new List<Action>();
            _onPauseFalse = new List<Action>();
            _onPauseTrue = new List<Action>();
            _onScreenSizeChanged = new List<Action>();

            DontDestroyOnLoad(this.gameObject);

            this.AddAction(EActionType.UPDATE, _ListenScreenSize);
        }



        private void _ListenScreenSize()
        {
            if (_xSize == Screen.width && _ySize == Screen.height)
            {
                return;
            }
            _xSize = Screen.width;
            _ySize = Screen.height;

            _DoFuncs(_onScreenSizeChanged);
        }

        public void AddAction(EActionType type, Action action)
        {
            switch (type)
            {
                case EActionType.UPDATE:
                    _onUpdate.Add(action);
                    m_UpdateCount = _onUpdate.Count;
                    break;
                case EActionType.LATE_UPDATE:
                    _onLateUpdate.Add(action);
                    m_LateUpdateCount = _onLateUpdate.Count;
                    break;
                case EActionType.FIXED_UPDATE:
                    _onFixedUpdate.Add(action);
                    m_FixedUpdateCount = _onFixedUpdate.Count;
                    break;
                case EActionType.Destory:
                    _onDestory.Add(action);
                    break;
                case EActionType.ON_PAUSE_FALSE:
                    _onPauseFalse.Add(action);
                    break;
                case EActionType.ON_PAUSE_TRUE:
                    _onPauseTrue.Add(action);
                    break;
                case EActionType.SCREEN_SIZE_CHANGE:
                    _onScreenSizeChanged.Add(action);
                    break;
                default:
                    DebugUtil.LogError( "{0} 暂未处理的消息类型: {1}", TAG, type);
                    break;
            }
        }

        public void RemoveAction(EActionType type, Action action)
        {
            switch (type)
            {
                case EActionType.UPDATE:
                    _onUpdate.Remove(action);
                    m_UpdateCount = _onUpdate.Count;
                    break;
                case EActionType.LATE_UPDATE:
                    _onLateUpdate.Remove(action);
                    m_LateUpdateCount = _onLateUpdate.Count;
                    break;
                case EActionType.FIXED_UPDATE:
                    _onFixedUpdate.Remove(action);
                    m_FixedUpdateCount = _onFixedUpdate.Count;
                    break;
            }
        }
        public Coroutine DoCoroutine(IEnumerator func)
        {

            return StartCoroutine(func);

        }
        public void CoroutineEnd(Coroutine cort)
        {
            if (cort != null)
                StopCoroutine(cort);
        }
        private static void _DoFuncs(List<Action> actions)
        {
            for (int i = 0; i < actions.Count; ++i)
            {
                actions[i].Invoke();
            }
        }

        void Update()
        {
            this.deltaTime = Time.deltaTime;
            m_UpdateCount = _onUpdate.Count;
            _DoFuncs(_onUpdate);
        }

        void LateUpdate()
        {
            _DoFuncs(_onLateUpdate);
        }

        void FixedUpdate()
        {
            _DoFuncs(_onFixedUpdate);
        }

        private void OnDestroy()
        {
            _DoFuncs(_onDestory);
        }

        private void OnApplicationPause(bool pause)
        {
            if (pause)
            {
                _DoFuncs(_onPauseTrue);
            }
            else
            {
                _DoFuncs(_onPauseFalse);
            }
        }

    }
}