using UnityEngine;

public class DoorController : MonoBehaviour
{
    [Header("Çʼö ¿¬°á")]
    public Transform player;
    public GameObject interactionCanvas;

    [Header("¼³Á¤")]
    public string targetSceneName = "NextMap";
    public float interactDistance = 2f;

    [Header("¿¬Ãâ ¼³Á¤")]
    public float fadeSpeed = 5f;
    public float floatSpeed = 2f;
    public float floatAmplitude = 0.2f;

    private CanvasGroup canvasGroup;
    private float currentAlpha = 0f;
    private Vector3 initialLocalPosition;

    void Start()
    {
        // 1. ÀνºÆåÅÍ¿¡¼­ ¼³Á¤ÇÑ UIÀÇ Ãʱâ À§Ä¡¸¦ ±â¾ïÇÕ´Ï´Ù.
        if (interactionCanvas != null)
        {
            initialLocalPosition = interactionCanvas.transform.localPosition;

            canvasGroup = interactionCanvas.GetComponent<CanvasGroup>();
            if (canvasGroup == null)
                canvasGroup = interactionCanvas.AddComponent<CanvasGroup>();

            canvasGroup.alpha = 0;
        }
    }

    void Update()
    {
        if (player == null || interactionCanvas == null) return;

        // 2. °Å¸® üũ ¹× ¾ËÆÄ(Åõ¸íµµ) Á¶Àý
        float distance = Vector3.Distance(player.position, transform.position);
        float targetAlpha = (distance <= interactDistance) ? 1f : 0f;

        currentAlpha = Mathf.MoveTowards(currentAlpha, targetAlpha, Time.deltaTime * fadeSpeed);
        canvasGroup.alpha = currentAlpha;

        if (currentAlpha > 0.01f)
        {
            // 3. [ÇÙ½É] ÀνºÆåÅÍ À§Ä¡¸¦ ±âÁØÀ¸·Î »óÇÏ Èçµé¸² È¿°ú¸¸ ÁÝ´Ï´Ù.
            // transform.positionÀ» °­Á¦·Î °íÁ¤ÇÏÁö ¾Ê°í localPositionÀ» »ç¿ëÇÕ´Ï´Ù.
            float yOffset = Mathf.Sin(Time.time * floatSpeed) * floatAmplitude;
            interactionCanvas.transform.localPosition = initialLocalPosition + new Vector3(0, yOffset, 0);

            // 4. ÀԷ üũ
            if (targetAlpha > 0.5f && Input.GetKeyDown(KeyCode.F))
            {
                Debug.Log(targetSceneName + " (À¸)·Î À̵¿ ½Ãµµ");
                // SceneLoader.Instance.LoadSceneWithFade(targetSceneName);
            }
        }
    }
}