using System;

using Engine.Core;

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

namespace Engine.Serializers.Yaml;

public class Line3DConverter : EngineTypeYamlSerializerBase<Line3D>
{
    public override Line3D Read(IParser parser, Type type, ObjectDeserializer rootDeserializer)
    {
        parser.Consume<MappingStart>();

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Line3D.From)) != 0)
            throw new ArgumentException($"{nameof(Line3D)} mapping must start with {nameof(Line3D.From)}");
        Vector3D from = (Vector3D)rootDeserializer(typeof(Vector3D))!;

        if (parser.Consume<Scalar>().Value.CompareTo(nameof(Line3D.To)) != 0)
            throw new ArgumentException($"{nameof(Line3D)} mapping must end with {nameof(Line3D.To)}");
        Vector3D to = (Vector3D)rootDeserializer(typeof(Vector3D))!;

        parser.Consume<MappingEnd>();

        return new Line3D(from, to);
    }

    public override void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
    {
        Line3D line3D = (Line3D)value!;

        emitter.Emit(new MappingStart());
        emitter.Emit(new Scalar(nameof(Line3D.From)));
        serializer(line3D.From, typeof(Vector3D));
        emitter.Emit(new Scalar(nameof(Line3D.To)));
        serializer(line3D.To, typeof(Vector3D));
        emitter.Emit(new MappingEnd());
    }
}