using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

public class DragChip : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
    public GameObject chipPrefab;
    public Image rouletteBoardImage;

    private RectTransform canvasRect;
    private RectTransform chipRect;
    private Vector2 originalPosition;
    private GameObject currentChip;
    private Canvas canvas;

    void Start()
    {
        // Get the RectTransform component of the canvas
        canvasRect = GetComponentInParent<Canvas>().GetComponent<RectTransform>();
        // Get the Canvas component of the parent object
        canvas = GetComponentInParent<Canvas>();
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        // Create a clone of the chip image at the current position
        currentChip = Instantiate(chipPrefab, transform.position, Quaternion.identity, canvas.transform);
        // Get the RectTransform component of the clone
        chipRect = currentChip.GetComponent<RectTransform>();
        // Store the original position of the clone before dragging
        originalPosition = chipRect.anchoredPosition;
        // Bring the clone to the front
        chipRect.SetAsLastSibling();
    }

    public void OnDrag(PointerEventData eventData)
    {
        // Move the clone with the mouse drag movement
        chipRect.anchoredPosition += eventData.delta / canvas.scaleFactor;
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        // If the clone exists, check if it's dropped onto the roulette board image
        if (currentChip != null)
        {
            RectTransform boardRect = rouletteBoardImage.GetComponent<RectTransform>();
            Vector2 localMousePos;
            // Check if the mouse position is within the bounds of the roulette board image
            if (RectTransformUtility.ScreenPointToLocalPointInRectangle(boardRect, Input.mousePosition, canvas.worldCamera, out localMousePos))
            {
                if (boardRect.rect.Contains(localMousePos))
                {
                    // If the chip is dropped onto the roulette board image, set its parent to the image and position it at the mouse cursor
                    chipRect.SetParent(rouletteBoardImage.transform);
                    chipRect.anchoredPosition = localMousePos;
                }
                else
                {
                    // If the chip is dropped outside of the roulette board image, destroy it
                    Destroy(currentChip);
                }
            }
            else
            {
                // If the mouse position is not within the bounds of the canvas, destroy the clone
                Destroy(currentChip);
            }

            // Set the clone to null to indicate that it no longer exists
            currentChip = null;
        }
    }
}