using System;
using System.Collections.Generic;
using Framework;
namespace Gameplay.Common
{
    public class GameUnitMapper
    {

        private static GameUnitMapper _instance;

        public static GameUnitMapper Inst
        {
            get
            {
                return _instance;
            }
        }

        public static GameUnitMapper CreateInstance()
        {
            if (_instance != null)
            {
                DebugUtil.LogError("请勿重复创建: GameUnitMapper");
                return _instance;
            }
            _instance = new GameUnitMapper();
            return _instance;
        }

        private readonly Dictionary<uint, GameUnit> _gameUnitDict;
        private readonly List<GameUnit> _unitList;
        public List<GameUnit> unitList
        {
            get
            {
                return _unitList;
            }
        }

        private GameUnitMapper()
        {
            _unitList = new List<GameUnit>();
            _gameUnitDict = new Dictionary<uint, GameUnit>();
        }

        public GameUnit GetUnitById(uint uId)
        {
            if (_gameUnitDict.TryGetValue(uId, out var unit))
            {
                return unit;
            }
            DebugUtil.Log("不存在的UnitId: {0}", uId);
            return null;
        }
        
        public void RemoveUnitById(uint uId)
        {
            if (_gameUnitDict.TryGetValue(uId, out var unit))
            {
                _gameUnitDict.Remove(uId);
                _unitList.Remove(unit);
            } 
            else
            {
                DebugUtil.Log("不存在的UnitId: {0}", uId);
            }
        }

        public void Init()
        {
            EventManager.Instance.Register(EventManager.EventName.UnitCreate, (Action<GameUnit>)_AddUnit);
            EventManager.Instance.Register(EventManager.EventName.UnitDispose, (Action<uint>)_RemoveUnit);
        }
        
        public void Dispose()
        {
            EventManager.Instance.Unregister(EventManager.EventName.UnitCreate, (Action<GameUnit>)_AddUnit);
            EventManager.Instance.Unregister(EventManager.EventName.UnitDispose, (Action<uint>)_RemoveUnit);
            
            _gameUnitDict.Clear();
            _unitList.Clear();
            _instance = null;
        }
        
        private void _AddUnit(GameUnit unit)
        {
            if (_gameUnitDict.ContainsKey(unit.GetID()))
            {
                DebugUtil.LogError("重复的UnitId: {0}",unit.GetID());
                return;
            }
            _unitList.Add(unit);
            _gameUnitDict.Add(unit.GetID(), unit);
        }
        
        private void _RemoveUnit(uint id)
        {
            if (!_gameUnitDict.ContainsKey(id))
            {
                DebugUtil.LogError("不存在的UnitId: {0}", id);
                return;
            }
            _unitList.Remove(_gameUnitDict[id]);
            _gameUnitDict.Remove(id);
        }
        
    }
}