using System;
using System.Numerics;
using MoonTools.Structs;

namespace MoonTools.Bonk
{
    /// <summary>
    /// A Point is "that which has not part". All points by themselves are identical.
    /// </summary>
    public struct Point : IShape2D, IEquatable<Point>
    {
        public AABB2D AABB { get; }

        public AABB2D TransformedAABB(Transform2D transform)
        {
            return AABB2D.Transformed(AABB, transform);
        }

        public Vector2 Support(Vector2 direction, Transform2D transform)
        {
            return Vector2.Transform(Vector2.Zero, transform.TransformMatrix);
        }

        public override bool Equals(object obj)
        {
            return obj is IShape2D other && Equals(other);
        }

        public bool Equals(IShape2D other)
        {
            return other is Point otherPoint && Equals(otherPoint);
        }

        public bool Equals(Point other)
        {
            return true;
        }

        public override int GetHashCode()
        {
            return 0;
        }

        public static bool operator ==(Point a, Point b)
        {
            return true;
        }

        public static bool operator !=(Point a, Point b)
        {
            return false;
        }
    }
}