using Godot;

namespace AceField.Scripts.Effects;

public partial class OffScreenMarker : Node2D
{
	public override void _Process(double delta)
	{
		var canvas = GetCanvasTransform();
		var topLeft = -canvas.Origin / canvas.Scale;
		var size = GetViewportRect().Size / canvas.Scale;
		SetMarkerPosition(new Rect2(topLeft, size));
		SetMarkerRotation();
	}

	private void SetMarkerPosition(Rect2 bounds)
	{
		var sprite = GetNode<Sprite2D>("Sprite2D");
		sprite.GlobalPosition = new Vector2(
			Mathf.Clamp(GlobalPosition.X, bounds.Position.X, bounds.End.X),
			Mathf.Clamp(GlobalPosition.Y, bounds.Position.Y, bounds.End.Y)
		);

		if (bounds.HasPoint(GlobalPosition)) Hide();
		else Show();
	}

	private void SetMarkerRotation()
	{
		var sprite = GetNode<Sprite2D>("Sprite2D");
		var angle = (GlobalPosition - sprite.GlobalPosition).Angle();
		sprite.GlobalRotation = angle;
		sprite.GetNode<Sprite2D>("Arrow").GlobalRotation = 0;
	}
}