using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UIElements;

public class InfoBox : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
    [SerializeField]
    private VisualTreeAsset uiAsset;

    [SerializeField]
    private PanelSettings uiPanelSettings;

    public bool AlwaysVisible;

    private UIDocument uiDocument;
    private Camera mainCamera;
    private IInventoryHolder inventoryHolder;
    private Label infoBox;

    void Start()
    {
        mainCamera = Camera.main;
        inventoryHolder = GetComponent<IInventoryHolder>();

        uiDocument = gameObject.AddComponent<UIDocument>();
        uiDocument.panelSettings = uiPanelSettings;
        uiDocument.visualTreeAsset = uiAsset;

        infoBox = uiDocument.rootVisualElement.Q<Label>("InfoBox");
    }

    void Update()
    {
        // Convert world position to screen space
        Vector3 screenPos = mainCamera.WorldToScreenPoint(transform.position);

        // Update panel position (UI Toolkit uses top-left origin)
        infoBox.style.left = screenPos.x;
        infoBox.style.top = Screen.height - screenPos.y;
        infoBox.style.visibility = AlwaysVisible ? Visibility.Visible : Visibility.Hidden;

        UpdateText();
    }

    void UpdateText()
    {
        infoBox.text = inventoryHolder.Inventory.ToString();
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        infoBox.style.visibility = Visibility.Visible;
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (!AlwaysVisible)
            infoBox.style.visibility = Visibility.Hidden;
    }
}