using System;

using YamlDotNet.Core;
using YamlDotNet.Core.Events;
using YamlDotNet.Serialization;

namespace Syntriax.Engine.Core.Serialization;

public class Projection1DSerializer : IEngineTypeYamlSerializer
{
    public bool Accepts(Type type) => type == typeof(Projection1D);

    public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
    {
        parser.Consume<MappingStart>();

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Projection1D.Min)) != 0)
            throw new ArgumentException($"{nameof(Projection1D)} mapping must start with {nameof(Projection1D.Min)}");
        float min = (float)rootDeserializer(typeof(float))!;

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Projection1D.Max)) != 0)
            throw new ArgumentException($"{nameof(Projection1D)} mapping must end with {nameof(Projection1D.Max)}");
        float max = (float)rootDeserializer(typeof(float))!;

        parser.Consume<MappingEnd>();

        return new Projection1D(min, max);
    }

    public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
    {
        Projection1D projection1D = (Projection1D)value!;

        emitter.Emit(new MappingStart());
        emitter.Emit(new Scalar(nameof(Projection1D.Min)));
        serializer(projection1D.Min, typeof(float));
        emitter.Emit(new Scalar(nameof(Projection1D.Max)));
        serializer(projection1D.Max, typeof(float));
        emitter.Emit(new MappingEnd());
    }
}