using System.Collections.Generic;
using BehaviorDesigner.Runtime;
using Cysharp.Threading.Tasks;
using Framework;
using UnityEngine;

namespace Gameplay.BT
{
    public partial class BTImplement
    {
        private Dictionary<string, ObjectPool<ExternalBehavior>> _behaviorPoolDic =
            new Dictionary<string, ObjectPool<ExternalBehavior> >();
        
        private Dictionary<string, int> _loadedRecord = new Dictionary<string, int>();
        
        public async UniTask PreLoadAI(HashSet<string> aiNames, int initCount)
        {

            foreach (var behaviorName in aiNames)
            {
                if (_behaviorPoolDic.ContainsKey(behaviorName))
                {
                    continue;
                }

                var entry = await LoadBehaviorAsset(behaviorName);
                var behaviorPool = new ObjectPool<ExternalBehavior>(
                    entry.InstanceExternalBehavior, null, null,
                    initCount);
                _behaviorPoolDic.Add(behaviorName, behaviorPool);
            }
        }
        
        public void ClearPool()
        {
            foreach (var behaviorPool in _behaviorPoolDic.Values)
            {
                behaviorPool.Destroy();
            }
            _behaviorPoolDic.Clear();
            UnloadAllRes();
        }


        private async UniTask<ExternalBehavior> GetBehavior(string behaviorName)
        {
            ObjectPool<ExternalBehavior> behaviorPool;
            if (!_behaviorPoolDic.ContainsKey(behaviorName))
            {
                var entry = await LoadBehaviorAsset(behaviorName);


                if (!_behaviorPoolDic.ContainsKey(behaviorName))
                {
                    behaviorPool = new ObjectPool<ExternalBehavior>(
                        entry.InstanceExternalBehavior);
                    _behaviorPoolDic.Add(behaviorName, behaviorPool);
                }
            }

            behaviorPool = _behaviorPoolDic[behaviorName];
            var behavior = behaviorPool.Get();
            return behavior;
        }
        
        private void ReleaseBehavior(string behaviorName, ExternalBehavior behavior)
        {
            if (!_behaviorPoolDic.ContainsKey(behaviorName))
            {
                DebugUtil.LogError("ReleaseBehavior failed, can not find behavior: {0}", behaviorName);
                return;
            }

            var behaviorPool = _behaviorPoolDic[behaviorName];
            behaviorPool.Release(behavior);
        }
    }
}