using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using TMPro;

public class Slot : MonoBehaviour, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler
{
    public GameObject item;
    public int ID;
    public string type;
    public string description;
    public bool empty;

    public Transform slotIconGO;
    public Sprite emptySlotSprite;
    public Sprite icon;

    public int amount;
    public TextMeshProUGUI amountText;

    public GameObject tooltipBackground;
    public TextMeshProUGUI infoText;

    public void OnPointerClick(PointerEventData pointerEventData)
    {
        UseItem();
    }

    public void OnPointerEnter(PointerEventData pointerEventData)
    {
        if (!empty)
        {
            tooltipBackground.SetActive(true);
            infoText.text = type + "n" + description;
        }
    }

    public void OnPointerExit(PointerEventData pointerEventData)
    {
        tooltipBackground.SetActive(false);
    }

    private void Start()
    {
        icon = GetComponent<Sprite>();
        

        // Initialize slot with the manually added item
        if (item != null)
        {
            Item itemComponent = item.GetComponent<Item>();
            if (itemComponent != null)
            {
                UpdateSlot(itemComponent.icon);
                amountText.text = amount.ToString();
            }
        }
    }

    private void Update()
    {
        if (tooltipBackground.activeSelf)
        {
            tooltipBackground.transform.position = Input.mousePosition + new Vector3(10, -10, 0);
        }
    }

    public void UpdateSlot(Sprite newIcon)
    {
        icon = newIcon;
        if (slotIconGO != null)
        {
            Image slotImage = slotIconGO.GetComponent<Image>();
            if (slotImage != null)
            {
                slotImage.sprite = icon;
            }
        }
    }

    public void ClearSlot()
    {
        icon = null;
        if (slotIconGO != null)
        {
            Image slotImage = slotIconGO.GetComponent<Image>();
            if (slotImage != null)
            {
                slotImage.sprite = emptySlotSprite;
            }
        }
    }

    private void UseItem()
    {
        Item itemComponent = item.GetComponent<Item>();
        if (itemComponent != null)
        {
            itemComponent.ItemUsage();
        }
        
        if (!empty)
        {
            amount--;
            if (amount <= 0)
            {
                ClearSlot();
            }
            UpdateAmountText();
        }
    }

    void UpdateAmountText()
    {
        if (amountText != null)
        {
            if (amount > 1)
            {
                amountText.text = amount.ToString();
            }
            else
            {
                amountText.text = "";
            }
        }
    }

    public void increaseAmount()
    {
        amount++;
        amountText.text = amount.ToString();
    }
}