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

public class DragItem : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
    public VegetableData vData;
    [HideInInspector] public Transform parentAfterDrag;
    private CanvasGroup canvasGroup;
    private RectTransform rectTransform;

    private void Start()
    {
        // Gunakan AddComponent jika belum ada, atau ambil yang sudah ada di prefab
        canvasGroup = GetComponent<CanvasGroup>();
        if (canvasGroup == null) canvasGroup = gameObject.AddComponent<CanvasGroup>();
        
        rectTransform = GetComponent<RectTransform>();
        
        if (vData != null) 
        {
            GetComponent<Image>().sprite = vData.fullColorSprite;
            rectTransform.localEulerAngles = new Vector3(0, 0, vData.rotasiManual);
            rectTransform.sizeDelta = vData.ukuranCustom;
        }
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        // SATPAM: Cek apakah AudioSource di GameManager lagi bunyi (VO sedang jalan)
        AudioSource audio = GameManager.instance.GetComponent<AudioSource>();
        if (audio != null && audio.isPlaying)
        {
            // Batalkan drag secara total
            eventData.pointerDrag = null; 
            return;
        }

        // Simpan parent asli (ChoiceArea) agar bisa pulang kalau salah drop
        parentAfterDrag = transform.parent;
        
        // Pindahkan ke root Canvas agar saat ditarik berada di paling depan
        transform.SetParent(transform.root);
        canvasGroup.blocksRaycasts = false;
    }

    public void OnDrag(PointerEventData eventData)
    {
        // Objek mengikuti posisi mouse/jari
        transform.position = Input.mousePosition;
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        canvasGroup.blocksRaycasts = true;
        GameObject dropObj = eventData.pointerCurrentRaycast.gameObject;

        // Cek apakah dilepas di atas objek yang punya script DropZone
        if (dropObj != null && dropObj.GetComponent<DropZone>() != null)
        {
            DropZone zone = dropObj.GetComponent<DropZone>();
            float distance = Vector2.Distance(rectTransform.position, dropObj.transform.position);

            // LOGIKA JIKA BENAR (Sayur cocok dan jarak dekat)
            if (zone.vData == vData && distance < 150f)
            {
                // 1. Tempelkan sayur ke dalam objek siluet (Target)
                transform.SetParent(dropObj.transform);
                
                // 2. Paksa posisi ke tengah siluet agar presisi
                rectTransform.anchorMin = new Vector2(0.5f, 0.5f);
                rectTransform.anchorMax = new Vector2(0.5f, 0.5f);
                rectTransform.pivot = new Vector2(0.5f, 0.5f);
                rectTransform.anchoredPosition = Vector2.zero;
                
                // Samakan rotasi dan ukuran dengan tempatnya
                rectTransform.rotation = dropObj.GetComponent<RectTransform>().rotation;
                rectTransform.sizeDelta = dropObj.GetComponent<RectTransform>().sizeDelta;

                // 3. Putar Voice Over Sayur
                if (vData.suaraVO != null)
                {
                    GameManager.instance.PutarVO(vData.suaraVO);
                }

                // 4. Tambah skor dan matikan script agar tidak bisa ditarik lagi
                GameManager.instance.TambahSkor(); 
                this.enabled = false; 
                return;
            }
            else 
            {
                // Munculkan popup salah jika siluet tidak cocok
                GameManager.instance.MunculkanWrong();
            }
        }
        else 
        {
            // Munculkan popup salah jika dilepas di area kosong
            if (dropObj != null) GameManager.instance.MunculkanWrong();
        }

        // JIKA SALAH: Kembalikan sayur ke kotak pilihan (ChoiceArea)
        transform.SetParent(parentAfterDrag);
        rectTransform.anchoredPosition = Vector2.zero;
    }
}