using Pong.Scripts.Data;
using Pong.Scripts.Managers;

namespace Pong.Scripts.Objects;

public partial class Paddle : BasePaddle
{
	private double _verticalInput;
	private readonly StringName _paddleUp = "paddle_up";
	private readonly StringName _paddleDown = "paddle_down";

	private bool _canMove = true;
	private Vector2 _originalPosition;

	public override void _EnterTree()
	{
		base._EnterTree();
		ScalingManager.NewPaddlePosition += SetNewPosition;
	}

	public override void _Process(double delta)
	{
		_verticalInput = GetVerticalInput();
	}

	public override void _IntegrateForces(PhysicsDirectBodyState2D state)
	{
		if (NewPosition.HasValue)
		{
			state.Transform = new Transform2D(0, NewPosition.Value);
			NewPosition = null;
		}

		state.LinearVelocity = Vector2.Up * MoveSpeed.ByMeter() * _verticalInput;
	}

	/// <summary>
	/// a method that returns a number that represents input on the vertical axis.
	/// </summary>
	/// <returns>1 for up, -1 for down, 0 for nothing.</returns>
	private double GetVerticalInput()
	{
		if (Input.IsActionPressed(_paddleUp))
		{
			return 1;
		}

		if (Input.IsActionPressed(_paddleDown))
		{
			return -1;
		}

		return 0;
	}
}