using UnityEngine;
using System.Collections.Generic;

public class GameObjectPool : MonoBehaviour
{
    [Tooltip("预制体")] public GameObject prefab;
    [Tooltip("初始预加载数量")] public int preload = 10;

    private Stack<GameObject> _pool = new();
    public Transform parent;

    private void Start()
    {
        for (var i = 0; i < preload; i++)
        {
            var go = Instantiate(prefab, transform);
            go.SetActive(false);
            _pool.Push(go);
        }
    }

    public GameObject Get()
    {
        var go = _pool.Count > 0 ? _pool.Pop() : Instantiate(prefab, parent);
        go.transform.parent = parent;
        go.SetActive(true);
        return go;
    }

    public void Release(GameObject go)
    {
        if (go == null) return;
        go.SetActive(false);
        go.transform.SetParent(transform, false);
        _pool.Push(go);
    }
}