using UnityEngine;
public class RaycastDisplayer : MonoBehaviour
{
    public static void DebugPhysicsRaycast(Ray ray, float distance, int layerMask)
    {
#if UNITY_EDITOR
        distance = Mathf.Max(distance, 1000f);
        GetDisplayer().PhysicsRaycast(ray.origin, ray.direction.normalized * distance, layerMask);
#else
        Module.Log.LogModule.ErrorLog("不允许在发布游戏中，使用射线Debug用的RaycastDisplayer！");
#endif
    }

    public static void DebugNavMeshRaycast(Ray ray, float distance, int areaMask)
    {
#if UNITY_EDITOR
        distance = Mathf.Max(distance, 1000f);
        GetDisplayer().NavMeshRaycast(ray.origin, ray.direction.normalized * distance, areaMask);
#else
        Module.Log.LogModule.ErrorLog("不允许在发布游戏中，使用射线Debug用的RaycastDisplayer！");
#endif
    }


#if UNITY_EDITOR
    private static RaycastDisplayer _displayer;
    private Vector3 _start;
    private Vector3 _end;
    private Vector3? _hitPoint;

    private static RaycastDisplayer GetDisplayer()
    {
        if (_displayer == null)
        {
            var displayObj = new GameObject("RaycastDisplayer");
            _displayer = displayObj.EnsureComponent<RaycastDisplayer>();
        }
        return _displayer;
    }

    private void PhysicsRaycast(Vector3 start, Vector3 end, int layerMask)
    {
        _start = start;
        _end = end;
        RaycastHit hit;
        if (Physics.Raycast(start, end - start, out hit, Vector3.Distance(start, end), layerMask))
            _hitPoint = hit.point;
        else
            _hitPoint = null;
    }

    private void NavMeshRaycast(Vector3 start, Vector3 end, int areaMask)
    {
        _start = start;
        _end = end;
        UnityEngine.AI.NavMeshHit hit;
        if (UnityEngine.AI.NavMesh.Raycast(start, end, out hit, areaMask))
            _hitPoint = hit.position;
        else
            _hitPoint = null;
    }

    private void OnDrawGizmos()
    {
        Gizmos.color = Color.blue;
        Gizmos.DrawLine(_start, _end);
        if (_hitPoint != null)
        {
            Gizmos.color = Color.red;
            Gizmos.DrawSphere(_hitPoint.Value, 0.1f);
        }
    }
#endif
}