Pong/Scripts/Managers/WallScalingManager.cs

using Godot;

namespace Pong.Scripts.Managers;

public partial class WallScalingManager : Node
{
	private Area2D _leftWall;
	private Area2D _rightWall;
	private StaticBody2D _topWall;
	private StaticBody2D _bottomWall;

	private Vector2I _gameResolution;

	private void GetNodes()
	{
		_leftWall = GetNode<Area2D>("Left");
		_rightWall = GetNode<Area2D>("Right");
		_topWall = GetNode<StaticBody2D>("Top");
		_bottomWall = GetNode<StaticBody2D>("Bottom");
	}

	public override void _EnterTree()
	{
		GetNodes();
		GetTree().Root.SizeChanged += AdaptToGameResolution;
		AdaptToGameResolution();
	}

	public override void _ExitTree()
	{
		GetTree().Root.SizeChanged -= AdaptToGameResolution;
	}

	private void AdaptToGameResolution()
	{
		_gameResolution = DisplayServer.WindowGetSize();
		SetWallPosition(CalculateEdgePosition(_gameResolution));
	}

	private static Vector2 CalculateEdgePosition(Vector2 resolution)
	{
		return new Vector2(resolution.X / 2, resolution.Y / 2);
	}

	private void SetWallPosition(Vector2 edgePosition)
	{
		var xSize = edgePosition.X - Constants.WallSizeExtents;
		var ySize = edgePosition.Y - Constants.WallSizeExtents;
		
		_leftWall.Position = new Vector2(-xSize, 0);
		_rightWall.Position = new Vector2(xSize, 0);
		_topWall.Position = new Vector2(0, -ySize);
		_bottomWall.Position = new Vector2(0, ySize);

		_leftWall.Scale = _leftWall.Scale with { Y = _gameResolution.Y };
		_rightWall.Scale = _rightWall.Scale with { Y = _gameResolution.Y };
		_topWall.Scale = _topWall.Scale with { X = _gameResolution.X - 60 };
		_bottomWall.Scale = _bottomWall.Scale with { X = _gameResolution.X - 60 };
	}
}