using System;

using Engine.Core;

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

namespace Engine.Serializers.Yaml;

public class Sphere3DConverter : EngineTypeYamlSerializerBase<Sphere3D>
{
    public override Sphere3D Read(IParser parser, Type type, ObjectDeserializer rootDeserializer)
    {
        parser.Consume<MappingStart>();

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Sphere3D.Center)) != 0)
            throw new ArgumentException($"{nameof(Sphere3D)} mapping must start with {nameof(Sphere3D.Center)}");
        Vector3D lowerBoundary = (Vector3D)rootDeserializer(typeof(Vector3D))!;

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Sphere3D.Radius)) != 0)
            throw new ArgumentException($"{nameof(Sphere3D)} mapping must end with {nameof(Sphere3D.Radius)}");
        float radius = (float)rootDeserializer(typeof(float))!;

        parser.Consume<MappingEnd>();

        return new Sphere3D(lowerBoundary, radius);
    }

    public override void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
    {
        Sphere3D sphere = (Sphere3D)value!;

        emitter.Emit(new MappingStart());
        emitter.Emit(new Scalar(nameof(Sphere3D.Center)));
        serializer(sphere.Center, typeof(Vector3D));
        emitter.Emit(new Scalar(nameof(Sphere3D.Radius)));
        serializer(sphere.Radius, typeof(float));
        emitter.Emit(new MappingEnd());
    }
}