using UnityEngine;
using System.Collections;
using Vuforia;

public enum AtomType
{
    H, O, C, N, S, Na, Cl
}

public class Atom : MonoBehaviour
{
    public AtomType atomType;
    public GameObject visual; 

    [HideInInspector] public bool isTracked;

    ObserverBehaviour observer;
    Coroutine popCoroutine;

    void Awake()
    {
        observer = GetComponent<ObserverBehaviour>();
    }

    void OnEnable()
    {
        if (observer != null)
            observer.OnTargetStatusChanged += OnStatusChanged;
    }

    void OnDisable()
    {
        if (observer != null)
            observer.OnTargetStatusChanged -= OnStatusChanged;
    }

    void OnStatusChanged(ObserverBehaviour behaviour, TargetStatus status)
    {
        bool newStatus = status.Status == Status.TRACKED;

        if (newStatus && !isTracked)
        {
            isTracked = true;
            if (visual != null)
            {
                visual.SetActive(true);
                if (popCoroutine != null) StopCoroutine(popCoroutine);
                popCoroutine = StartCoroutine(AnimatePop(visual.transform));
            }
        }
        else if (!newStatus && isTracked)
        {
            isTracked = false;
            if (visual != null) visual.SetActive(false);
        }
    }

    // --- ANIMASI EASE OUT BACK (PREMIUM FEEL) ---
    IEnumerator AnimatePop(Transform target)
    {
        float timer = 0;
        float duration = 0.6f; // Sedikit dipelanin biar curve-nya kerasa
        
        target.localScale = Vector3.zero;

        while (timer < duration)
        {
            timer += Time.deltaTime;
            float x = timer / duration; // Nilai 0 sampai 1

            // RUMUS EASE OUT BACK
            // c1 adalah seberapa jauh dia "kebablasan" (overshoot).
            // 1.70158 adalah standar industri. Kalau mau lebih "mentul", naikkan jadi 2.5f.
            float c1 = 1.70158f; 
            float c3 = c1 + 1;
            
            // Rumus Matematika: 1 + c3 * (x-1)^3 + c1 * (x-1)^2
            float scale = 1 + c3 * Mathf.Pow(x - 1, 3) + c1 * Mathf.Pow(x - 1, 2);

            target.localScale = Vector3.one * scale;
            yield return null;
        }

        target.localScale = Vector3.one;
    }
}