using Vellum;

namespace Azimuth.Vellum
{
    /// <summary>
    /// Saves a Complex as its real and imaginary parts.
    /// </summary>
    public sealed class ComplexConverter : SaveConverter<Complex>
    {
        public override SaveNode Write(Complex value, SaveSession session)
        {
            SaveNode returnMe = SaveNode.NewTable();
            returnMe.Entries["Real"] = session.ToNode(value.Real);
            returnMe.Entries["Imaginary"] = session.ToNode(value.Imaginary);
            return returnMe;
        }

        public override Complex Read(SaveNode node, SaveSession session)
        {
            return new Complex(
                session.FromNode<Scalar>(node.RequireEntry("Real")),
                session.FromNode<Scalar>(node.RequireEntry("Imaginary")));
        }
    }
}