using UnityEngine;

public class loadtopandbottomPrefab: MonoBehaviour
{
    [Header("father obj")]
    public GameObject top_and_bottom_Panel;
    public GameObject gameobject_to_Instantiate_below;
    [SerializeField] bool notify_Main_Panel = true;

    void Start()
    {
        if (top_and_bottom_Panel != null && gameobject_to_Instantiate_below != null)
        {
            GameObject instantiated = FindExistingPanelInstance();
            if (instantiated == null)
            {
                instantiated = Instantiate(top_and_bottom_Panel, gameobject_to_Instantiate_below.transform);
            }

            Canvas canvas = instantiated.GetComponent<Canvas>();
            if (canvas != null)
            {
                Camera cam = Camera.main;
                if (cam == null)
                {
                    cam = SceneObjectLookupCache.FindAny<Camera>();
                }
                canvas.worldCamera = cam;
                cam = null;
            }
            if (notify_Main_Panel)
            {
                Bind_Main_Panel(instantiated);
            }
        }
    }

    GameObject FindExistingPanelInstance()
    {
        if (gameobject_to_Instantiate_below == null || top_and_bottom_Panel == null)
        {
            return null;
        }

        string prefabName = top_and_bottom_Panel.name;
        Transform parent = gameobject_to_Instantiate_below.transform;
        for (int i = 0; i < parent.childCount; i++)
        {
            Transform child = parent.GetChild(i);
            if (child == null)
            {
                continue;
            }

            bool nameMatches = child.name == prefabName || child.name == prefabName + "(Clone)";
            bool hasBars = child.Find("TOP") != null || child.Find("BTM") != null;
            if (nameMatches && hasBars)
            {
                return child.gameObject;
            }
        }

        return null;
    }

    void Bind_Main_Panel(GameObject instantiated)
    {
        if (instantiated == null)
        {
            return;
        }
        UI_Panel_Main main = SceneObjectLookupCache.FindAny<UI_Panel_Main>();
        if (main == null)
        {
            return;
        }
        RectTransform top = instantiated.transform.Find("TOP") as RectTransform;
        RectTransform bottom = instantiated.transform.Find("BTM") as RectTransform;
        if (top != null || bottom != null)
        {
            main.Bind_Top_Bottom(top, bottom);
        }
    }
}