using Godot;

public partial class GameCamera : Camera2D
{
	[Export] public Player Player;
	[Export] public Vector2 CameraBounds;
	
	/// <summary>
	/// World position of the flashlight
	/// </summary>
	public Vector2 FlashlightPosition;

	public override void _PhysicsProcess(double delta)
	{
		var relativePlayerPosition = Player.Position - Position;
		var halfCameraBounds = CameraBounds / 2;
		float x = 0, y = 0;
		if (relativePlayerPosition.X > halfCameraBounds.X)
		{
			x = relativePlayerPosition.X - halfCameraBounds.X;
		}
		else if (relativePlayerPosition.X < -halfCameraBounds.X)
		{
			x = relativePlayerPosition.X + halfCameraBounds.X;
		}
		if (relativePlayerPosition.Y > halfCameraBounds.Y)
		{
			y = relativePlayerPosition.Y - halfCameraBounds.Y;
		}
		else if (relativePlayerPosition.Y < -halfCameraBounds.Y)
		{
			y = relativePlayerPosition.Y + halfCameraBounds.Y;
		}

		var difference = new Vector2(x, y);
		Position += difference;
		FlashlightPosition += difference;
	}

	public override void _Input(InputEvent @event)
	{
		base._Input(@event);

		if (@event is InputEventMouseMotion eventMouseMotion)
		{
			FlashlightPosition = eventMouseMotion.Position - Constants.HalfScreenSize + Position;
		}
	}
}