using HC3.Terrain;
using System;

namespace HC3;

/// <summary>
/// The visuals for current cursor path
/// this doesn't really need to be it's own Component but I imagine we'll replace this with a nice pretty mesh at some point?
/// </summary>
class CursorPath : Component
{
	PathBuilder PathBuilder => PathBuilder.Instance;

	protected override void OnUpdate()
	{
		base.OnUpdate();

		if ( !PathBuilder.Enabled || !PathBuilder.CursorPosition.HasValue )
		{
			DestroyGameObject();
			return;
		}

		using var gizmo = Gizmo.Scope( "CursorPath" );

		Vector3 direction = (Vector3Int)PathBuilder.Direction.GetDirection();
		WorldPosition = GridManager.GridToWorldPosition( PathBuilder.CursorPosition.Value ) + GridManager.CentreOffset;
		WorldRotation = Rotation.LookAt( direction );

		var bbox = BBox.FromPositionAndSize( WorldPosition + Vector3.Up * 4, new Vector3( GridManager.GridSize, GridManager.GridSize, 0 ) );

		Gizmo.Draw.LineThickness = 4;
		Gizmo.Draw.Color = Color.White.WithAlpha( 0.2f );
		//Gizmo.Draw.LineBBox( bbox );

		Gizmo.Transform = WorldTransform;

		var start = Vector3.Up * 4;
		float offset = 18 + (MathF.Sin( RealTime.Now * 4 ) * 5);

		Gizmo.Draw.Color = Color.White;
		Gizmo.Draw.Model( "models/gameplay/arrow.vmdl", new Transform( start + Vector3.Forward * offset, Rotation.LookAt( Vector3.Up, Vector3.Left ) ) );
	}
}