namespace Pong.Scripts.Data;

/// <summary>
/// a record class that represents the game area.
/// </summary>
public record GameArea
{
	/// <summary>
	/// the X coordinate of the GameArea wrapped in a struct that makes operating on it easier. this is divided
	/// by 2 in the constructor to represent both sides of the screen by either negative or positive of the number.
	/// </summary>
	public GameCoordinate X { get; }

	/// <summary>
	/// the Y coordinate of the GameArea wrapped in a struct that makes operating on it easier. this is divided
	/// by 2 in the constructor to represent both sides of the screen by either negative or positive of the number.
	/// </summary>
	public GameCoordinate Y { get; }

	/// <summary>
	/// take a global position inside the game area and normalize it to a value between 0 and 1 which represents the game area.
	/// </summary>
	/// <param name="globalPosition">a Vector2 containing a global position inside the game area.</param>
	public Vector2 NormalizePosition(Vector2 globalPosition)
	{
		float normalizedX = (float)Mathf.InverseLerp(-X.ByWallSizeExtents, X.ByWallSizeExtents, globalPosition.X);
		float normalizedY = (float)Mathf.InverseLerp(-Y.ByWallSizeExtents, Y.ByWallSizeExtents, globalPosition.Y);
		return new Vector2(normalizedX, normalizedY);
	}

	/// <summary>
	/// take a normalized position and convert it back into a globalized position.
	/// </summary>
	/// <param name="normalizedPosition">a Vector2 containing a normalized position.</param>
	public Vector2 GlobalizePosition(Vector2 normalizedPosition)
	{
		float globalizedX = (float)Mathf.Lerp(-X.ByWallSizeExtents, X.ByWallSizeExtents, normalizedPosition.X);
		float globalizedY = (float)Mathf.Lerp(-Y.ByWallSizeExtents, Y.ByWallSizeExtents, normalizedPosition.Y);
		return new Vector2(globalizedX, globalizedY);
	}

	public GameArea(Vector2 area)
	{
		X = new GameCoordinate(area.X / 2);
		Y = new GameCoordinate(area.Y / 2);
	}
}