using System;

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

namespace Syntriax.Engine.Core.Serialization;

public class Vector2DSerializer : IEngineTypeYamlSerializer
{
    private static readonly int SUBSTRING_START_LENGTH = nameof(Vector2D).Length + 1;

    public bool Accepts(Type type) => type == typeof(Vector2D);

    public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
    {
        string value = parser.Consume<Scalar>().Value;
        string insideParenthesis = value[SUBSTRING_START_LENGTH..^1];
        string[] values = insideParenthesis.Split(", ");
        return new Vector2D(float.Parse(values[0]), float.Parse(values[1]));
    }

    public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
    {
        Vector2D vector2D = (Vector2D)value!;
        emitter.Emit(new Scalar($"{nameof(Vector2D)}({vector2D.X}, {vector2D.Y})"));
    }
}