using System.Collections;
using UnityEngine;
using BigSpace.XRCore.Event;
using BigSpace.Logic;

public class QuadCatchCtr : MonoBehaviour
{
    [Header("检测设置")]
    [SerializeField] private float rayLength = 50f;
    [SerializeField] private LayerMask detectionLayer;

    [Tooltip("张开手丢失后保持就绪的宽限时间（秒），避免手势过渡时漏判")]
    [SerializeField] private float readyGracePeriod = 0.3f;

    private bool m_isReady    = false;
    private bool m_isCatching = false;
    private Coroutine m_graceCoroutine;

    // ── 张开手 StaticHandGesture ────────────────────────────────

    public void OnOpenHandDetected()
    {
        // 取消正在倒计时的宽限期
        if (m_graceCoroutine != null)
        {
            StopCoroutine(m_graceCoroutine);
            m_graceCoroutine = null;
        }
        m_isReady = true;
    }

    public void OnOpenHandLost()
    {
        // 不立即清除，给握拳手势留过渡窗口
        m_graceCoroutine = StartCoroutine(ClearReadyAfterDelay());
    }

    private IEnumerator ClearReadyAfterDelay()
    {
        yield return new WaitForSeconds(readyGracePeriod);
        if (!m_isCatching)
            m_isReady = false;
        m_graceCoroutine = null;
    }

    // ── 握拳 StaticHandGesture ──────────────────────────────────

    public void OnFistDetected()
    {
        if (!m_isReady || m_isCatching) return;

        // 相机视线射线验证
        Camera cam = Camera.main;
        Ray ray = new Ray(cam.transform.position, cam.transform.forward);

        if (!Physics.Raycast(ray, out RaycastHit hit, rayLength, detectionLayer))
            return;

        string hitName = hit.collider.gameObject.name;
        if (hitName.Length < 5 || hitName.Substring(0, 4) != "Quad") return;
        if (!int.TryParse(hitName.Substring(4), out int fontIndex))  return;

        m_isCatching = true;
        GlobalEventMgr.Dispatch(GameEvent.EventRayQuadOk, true, 2, fontIndex);
    }

    public void OnFistLost()
    {
        if (!m_isCatching) return;
        m_isCatching = false;
        m_isReady    = false;
        GlobalEventMgr.Dispatch(GameEvent.EventHandRelease, 2);
    }
}