using UnityEngine;
using UnityEngine.Events;

/// <summary>
/// 挂载在可拖拽的 3D 物体上（如绷带、夹板）。
/// 配合 InteractionSystem 使用。
/// </summary>
public class DraggableObject : MonoBehaviour
{
    [Header("拖拽状态")]
    public bool IsDraggable = true;

    [Header("吸附目标")]
    public Transform SnapTarget;

    [Header("事件")]
    public UnityEvent OnDragStartEvent;
    public UnityEvent OnDragEndEvent;
    public UnityEvent OnSnappedEvent;    // 吸附成功

    private Vector3 _originalPosition;
    private Quaternion _originalRotation;

    private void Start()
    {
        _originalPosition = transform.position;
        _originalRotation = transform.rotation;
    }

    public void OnDragStart()
    {
        OnDragStartEvent?.Invoke();
    }

    public void OnDragEnd()
    {
        OnDragEndEvent?.Invoke();
    }

    public void OnSnapped()
    {
        Debug.Log($"DraggableObject: {name} 已吸附到目标");
        OnSnappedEvent?.Invoke();
        IsDraggable = false; // 吸附后不可再拖动
    }

    /// <summary>重置到初始位置</summary>
    public void ResetPosition()
    {
        transform.position = _originalPosition;
        transform.rotation = _originalRotation;
        IsDraggable = true;
    }
}