using FirstVillain.Singleton;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.Pool;
using UnityEngine.ResourceManagement.AsyncOperations;

public class AddressableManager : UnitySingleton<AddressableManager>
{
    private bool _collectionCheck = false;
    private int _maxPoolSize = 100;
    private Dictionary<string, ObjectPool<GameObject>> _objectPoolDict = new();
    protected override void AwakeSingleton()
    {
        base.AwakeSingleton();
        Addressables.InitializeAsync();
    }
    public void LoadAssetAsync<T>(string name, Action<T> onComplete) where T : UnityEngine.Object
    {
        var handle = Addressables.LoadAssetAsync<T>(name);
        handle.Completed += handler => 
        {
            if(handler.Status == UnityEngine.ResourceManagement.AsyncOperations.AsyncOperationStatus.Succeeded)
            {
                onComplete(handler.Result);
                Addressables.Release(handle);
            }
        };
    }

    public AsyncOperationHandle LoadTableAssetAsync<T>(string name, Action<T> onComplete) where T : UnityEngine.Object
    {
        var handle = Addressables.LoadAssetAsync<T>(name);
        handle.Completed += handler =>
        {
            if (handler.Status == UnityEngine.ResourceManagement.AsyncOperations.AsyncOperationStatus.Succeeded)
            {
                onComplete(handler.Result);
            }
        };

        return handle;
    }
    //public void InstantiateAsync(string name, Transform parent, Action<GameObject> onComplete)
    //{
    //    var handle = Addressables.InstantiateAsync(name, parent);
    //    handle.Completed += handler =>
    //    {
    //        onComplete(handle.Result);
    //        Addressables.Release(handle);
    //    };
    //}

    public void Spawn(string name, Transform parent, Action<GameObject> complete)
    {
        if(_objectPoolDict.ContainsKey(name))
        {
            var obj = _objectPoolDict[name].Get();
            obj.transform.parent = parent;
            complete(obj);
            return;
        }

        LoadAssetAsync<GameObject>(name, OnComplete => 
        {
            _objectPoolDict.Add(name, CreateNewObjectPool(OnComplete, name));
            var obj = _objectPoolDict[name].Get();
            obj.transform.parent = parent;
            complete(obj);
        });

    }
    public void Release(GameObject obj)
    {
        if (_objectPoolDict.ContainsKey(obj.name))
        {
            try
            {
                obj.transform.parent = null;
                obj.transform.position = Vector3.zero;
                obj.transform.rotation = Quaternion.identity;
                try
                {
                    _objectPoolDict[obj.name].Release(obj);
                }
                catch
                {
                    obj.SetActive(false);
                }
            }
            catch (Exception ex)
            {
                Debug.LogError($"Exception has occured!!! Object : {obj.name} === {ex.Message}");
            }
        }
        else
        {
            Debug.LogWarning($"Object[{obj.name}] does not exist in pool dictionary. But it's been destroyed anyway :D");
            Destroy(obj);
        }
    }
    private ObjectPool<GameObject> CreateNewObjectPool(GameObject prefab, string resourceName)
    {
        return new ObjectPool<GameObject>(
                    () =>
                    {
                        GameObject obj = Instantiate(prefab);
                        obj.name = resourceName;
                        return obj;
                    },
                    OnGetFromPoolActive,
                    OnReleasedToPool,
                    OnDestroyPoolObject,
                    _collectionCheck /* Collection checks will throw errors if we try to release an item that is already in the pool.*/,
                    10/*defalut capacity*/,
                    _maxPoolSize
        );
    }

    private void OnGetFromPoolInActive(GameObject obj)
    {
        obj.SetActive(false);
    }

    private void OnGetFromPoolActive(GameObject obj)
    {
        obj.SetActive(true);
    }

    private void OnReleasedToPool(GameObject obj)
    {
        obj.SetActive(false);
    }

    private void OnDestroyPoolObject(GameObject obj)
    {
        Destroy(obj);
    }
}