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

public class AddressableManager : UnitySingleton<AddressableManager>
{
    [SerializeField] private Transform _objectPoolRoot;
    private bool _collectionCheck = false;
    private int _maxPoolSize = 100;
    private Dictionary<string, ObjectPool<GameObject>> _objectPoolDict = new();
    protected override void AwakeSingleton()
    {
        base.AwakeSingleton();
        Addressables.InitializeAsync();
    }
    public T LoadAssetAsync<T>(string name) where T : UnityEngine.Object
    {
        var handle = Addressables.LoadAssetAsync<T>(name);

        var result = handle.WaitForCompletion();
        Addressables.Release(handle);
        return result;
    }

    public GameObject Spawn(string name, Transform parent)
    {
        if(!_objectPoolDict.ContainsKey(name))
        {
            var loaded = LoadAssetAsync<GameObject>(name);
            _objectPoolDict.Add(name, CreateNewObjectPool(loaded, name));
        }

        GameObject obj;
        obj = _objectPoolDict[name].Get();
        obj.transform.SetParent(parent);
        return obj;
    }

    public void Release(GameObject obj)
    {
        if (_objectPoolDict.ContainsKey(obj.name))
        {
            try
            {
                obj.transform.parent = null;

                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);
        }
    }

    public void ReleaseAll()
    {
        foreach (var pool in _objectPoolDict)
        {
            pool.Value.Dispose();
        }
        _objectPoolDict.Clear();
    }
    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);
    }
}