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

public class TarikGarisUI : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
    [Header("Identitas & Suara (Edukasi)")]
    public string idGaris;
    public AudioClip kasetNamaObjek;    // Contoh: Suara "Paus"
    public AudioClip kasetNamaTujuan;   // Contoh: Suara "Ekosistem Laut"

    [Header("Pasangan Jawaban Benar")]
    public RectTransform targetBenar; 

    private GameObject objekGaris;
    private RectTransform rectGaris;
    private bool sudahTerkoneksi = false;
    private Canvas canvasUtama;

    void Start()
    {
        canvasUtama = GetComponentInParent<Canvas>();

        objekGaris = new GameObject("Tali_" + gameObject.name);
        objekGaris.transform.SetParent(this.transform, false);
        
        Image img = objekGaris.AddComponent<Image>();
        img.color = new Color(1f, 0.5f, 0f); 
        img.raycastTarget = false; 

        rectGaris = objekGaris.GetComponent<RectTransform>();
        rectGaris.pivot = new Vector2(0, 0.5f); 
        rectGaris.sizeDelta = new Vector2(0, 15f); 
        rectGaris.anchoredPosition = Vector2.zero; 
        
        objekGaris.SetActive(false); 
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        if (sudahTerkoneksi) return; 

        // ========================================================
        // REVISI SISTEM SUARA: GANTI KASET OTOMATIS (ANTI NABRAK)
        // ========================================================
        ManagerMencocokan managerGame = FindObjectOfType<ManagerMencocokan>();
        if (managerGame != null && kasetNamaObjek != null)
        {
            // 1. Paksa berhenti suara yang sedang ngoceh (baik itu suara narator, hewan lain, atau penjelasan)
            managerGame.speakerGame.Stop();
            
            // 2. Masukkan kaset nama hewan yang baru dipencet
            managerGame.speakerGame.clip = kasetNamaObjek;
            
            // 3. Mainkan kasetnya
            managerGame.speakerGame.Play();
        }

        objekGaris.SetActive(true);
        objekGaris.transform.SetAsLastSibling();
    }

    public void OnDrag(PointerEventData eventData)
    {
        if (sudahTerkoneksi) return;
        
        Vector3 posisiAwal = transform.position;
        Vector3 posisiJari = eventData.position; 

        float jarak = Vector3.Distance(posisiAwal, posisiJari);
        Vector3 arah = posisiJari - posisiAwal;
        float sudut = Mathf.Atan2(arah.y, arah.x) * Mathf.Rad2Deg;

        float jarakAntiMelar = jarak / canvasUtama.scaleFactor;

        rectGaris.sizeDelta = new Vector2(jarakAntiMelar, 15f); 
        rectGaris.rotation = Quaternion.Euler(0, 0, sudut); 
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        if (sudahTerkoneksi) return;
        if (targetBenar == null) return;

        Vector2 posisiTargetLayar = RectTransformUtility.WorldToScreenPoint(eventData.pressEventCamera, targetBenar.position);
        float jarakKeTarget = Vector2.Distance(eventData.position, posisiTargetLayar);

        if (jarakKeTarget < 200f) 
        {
            Vector3 posisiAwal = transform.position;
            Vector3 posisiTarget = targetBenar.position;
            
            float jarakPas = Vector3.Distance(posisiAwal, posisiTarget);
            Vector3 arahPas = posisiTarget - posisiAwal;
            float sudutPas = Mathf.Atan2(arahPas.y, arahPas.x) * Mathf.Rad2Deg;

            float jarakPasAntiMelar = jarakPas / canvasUtama.scaleFactor;

            rectGaris.sizeDelta = new Vector2(jarakPasAntiMelar, 15f);
            rectGaris.rotation = Quaternion.Euler(0, 0, sudutPas);
            
            sudahTerkoneksi = true;
            
            // ========================================================
            // REVISI: LAPOR KE MANAGER SAMBIL KIRIM KASET EKOSISTEM
            // ========================================================
            ManagerMencocokan managerGame = FindObjectOfType<ManagerMencocokan>();
            if (managerGame != null) 
            {
                managerGame.GarisTersambung(kasetNamaTujuan); 
            }
        }
        else
        {
            objekGaris.SetActive(false);
            rectGaris.sizeDelta = new Vector2(0, 15f);
            
            ManagerMencocokan managerGame = FindObjectOfType<ManagerMencocokan>();
            if (managerGame != null) managerGame.JawabanSalah(); 
        }
    }
}