using UnityEngine;
using UnityEngine.UI;

public class InventoryUI : MonoBehaviour
{
    [SerializeField] private Image[] slotImages;
    [SerializeField] private Image highlightImage; // Single highlight sprite
    [SerializeField] private Inventory inventory;
    [SerializeField] private Color normalColor = Color.white;

    void Start()
    {
        RefreshUI();
        highlightImage.enabled = false; // Hide highlight initially
    }

    public void RefreshUI()
    {
        for (int i = 0; i < slotImages.Length; i++)
        {
            Item itemInSlot = inventory.slots[i];
            if (itemInSlot != null && itemInSlot.itemIcon != null)
            {
                slotImages[i].sprite = itemInSlot.itemIcon;
                slotImages[i].color = normalColor;
            }
            else
            {
                slotImages[i].sprite = null;
                slotImages[i].color = new Color(1, 1, 1, 0);
            }
        }

        HighlightSlot(inventory.currentSlot);
    }

    private void HighlightSlot(int slotIndex)
    {
        if (slotIndex < 0 || slotIndex >= slotImages.Length)
        {
            // Debug.LogWarning("Slot index out of bounds: " + slotIndex);
            highlightImage.enabled = false;
            return;
        }

        // Only show highlight if the slot has an item
        // if (slotImages[slotIndex].sprite == null)
        // {
            // Debug.Log("Highlighting slot: " + slotIndex);
            highlightImage.transform.position = slotImages[slotIndex].transform.position;
            // move infront of the slot
            highlightImage.transform.SetAsLastSibling();
            highlightImage.transform.localScale = slotImages[slotIndex].transform.localScale;
            highlightImage.color = new Color(1, 1, 1, 0.8f); // Semi-transparent
            highlightImage.enabled = true;
        // }
        // else
        // {
            // highlightImage.enabled = false;
        // }
    }
}