using UnityEngine;

public class VRInputPoseDetector : MonoBehaviour
{
    [SerializeField] private Transform headTransform;
    [SerializeField] private Transform rightHandTransform;
    [SerializeField] private Transform leftHandTransform;
    [SerializeField] private float minForwardDistance = 0.15f;
    [SerializeField] private float maxForwardDistance = 0.5f; 
    [SerializeField] private float minHeightOffset = -0.35f;
    [SerializeField] private float maxHeightOffset = -0.1f;
    [SerializeField] private float requiredPoseTime = -0.3f;
    private float poseTimer = 0f;
    private bool isPoseMainTained = false;
    public bool IsPosing => isPoseMainTained;

    void Update()
    {
        if(headTransform == null || rightHandTransform == null || leftHandTransform == null) return;

        //両手の世界座標を頭を中心としたローカル座標に変換
        Vector3 localRightHand = headTransform.InverseTransformPoint(rightHandTransform.position); 
        Vector3 localLeftHand = headTransform.InverseTransformPoint(leftHandTransform.position);

        //両手が構え範囲に入っているかチェック
        bool isRightHandGuarding = CheckHandPosition(localRightHand);
        bool isLeftHandGuarding = CheckHandPosition(localLeftHand);

        //両手が構え範囲にある場合のタイマー処理
        if(isRightHandGuarding && isLeftHandGuarding)
        {
            poseTimer += Time.deltaTime;
            if(poseTimer >= requiredPoseTime && !isPoseMainTained)
            {
                isPoseMainTained = true;
                Debug.Log("kamaeseikou");
            }
        }
        else
        {
            poseTimer = 0f;
            if(isPoseMainTained)
            {
                isPoseMainTained = false;
                Debug.Log("kamaesippai");
            }
        }
    }

    //
    private bool CheckHandPosition(Vector3 localHandPos)
    {
        bool inForwardRange = localHandPos.z >= minForwardDistance && localHandPos.z <= maxForwardDistance; //Ｚ軸：頭より前に手があるか
        bool inHeightRange = localHandPos.y >= minHeightOffset && localHandPos.y <= maxHeightOffset; //Ｙ軸：手の高さが適切か

        return inForwardRange && inHeightRange;
    }
}