using Sandbox;

public sealed class SliceDebugInput : Component
{
	[Property] public float TraceDistance { get; set; } = 5000.0f;
	[Property] public bool IgnoreOwnerHierarchy { get; set; } = true;

	protected override void OnUpdate()
	{
		if ( !Input.Pressed( "attack1" ) )
			return;

		if ( !TryGetSlicePlaneFromTrace( out var slicer, out var worldPoint, out var worldNormal ) )
			return;

		slicer.SliceAndSpawnWorld( worldPoint, worldNormal, autoCopyPhysics: true );
	}

	private bool TryGetSlicePlaneFromTrace( out MeshSlicerComponent slicer, out Vector3 worldPoint, out Vector3 worldNormal )
	{
		slicer = default;
		worldPoint = default;
		worldNormal = default;

		var scene = Scene;
		if ( scene is null )
			return false;

		var ray = BuildTraceRay( scene );

		var trace = scene.Trace
			.Ray( ray, TraceDistance > 1.0f ? TraceDistance : 1.0f )
			.UseHitPosition( true );

		if ( IgnoreOwnerHierarchy )
		{
			trace = trace.IgnoreGameObjectHierarchy( GameObject );
		}

		foreach ( var hit in trace.RunAll() )
		{
			if ( !hit.Hit || !hit.GameObject.IsValid() )
				continue;

			var resolvedSlicer = hit.GameObject.GetComponentInParent<MeshSlicerComponent>( true, true );
			if ( resolvedSlicer is null )
				continue;

			var sourceObject = resolvedSlicer.Target?.GameObject ?? resolvedSlicer.GameObject;
			var sourceUp = sourceObject?.WorldRotation.Up ?? Vector3.Up;

			slicer = resolvedSlicer;
			worldPoint = hit.HitPosition;
			worldNormal = sourceUp;
			return true;
		}

		return false;
	}

	private Ray BuildTraceRay( Scene scene )
	{
		var camera = scene.Camera;
		if ( camera is not null )
		{
			return camera.ScreenNormalToRay( new Vector3( 0.5f, 0.5f, 0.0f ) );
		}

		return new Ray( WorldPosition, WorldRotation.Forward );
	}
}