using System.Numerics;

namespace OnekoOnline;

static class MathExtensions
{
    public static Vector2 LimitLength(this Vector2 toLimit, float lengthLimit)
    {
        float length = toLimit.Length();
        if (toLimit == Vector2.Zero) return Vector2.Zero;
        return Vector2.Normalize(toLimit) * MathF.Min(length, lengthLimit);
    }

    public static Vector2 Round(this Vector2 toRound)
    {
        return new(MathF.Round(toRound.X), MathF.Round(toRound.Y));
    }
}

public static class Directions
{
    public static readonly Vector2 Up = new(0,-1);
    public static readonly Vector2 Down = new(0,1);
    public static readonly Vector2 Left = new(-1,0);
    public static readonly Vector2 Right = new(1,0);

    public static readonly Vector2 UpLeft = Vector2.Normalize(Up+Left);
    public static readonly Vector2 UpRight = Vector2.Normalize(Up+Right);
    public static readonly Vector2 DownLeft = Vector2.Normalize(Down+Left);
    public static readonly Vector2 DownRight = Vector2.Normalize(Down+Right);

    public static readonly Vector2[] AllDirections = [Up,Down,Left,Right,UpLeft,UpRight,DownLeft,DownRight];
}