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

namespace TimePasses.Model;

public interface IWhen {
    string Text { get; }
    bool Slowly { get; }

    bool IsValid(Plugin plugin);
}

public class WhenConverter : IYamlTypeConverter {
    public bool Accepts(Type type) {
        // FIXME? typeof(IWhen).IsAssignableFrom(type)
        return typeof(IWhen) == type;
    }

    public object? ReadYaml(IParser parser, Type type) {
        parser.Consume<MappingStart>();
        var name = parser.Consume<Scalar>();
        if (!name.IsKey) {
            throw new YamlException("invalid when: missing key");
        }

        IWhen when;
        switch (name.Value) {
            case "quest": {
                when = Plugin.Deserializer.Deserialize<WhenQuest>(parser);
                break;
            }
            default: {
                throw new YamlException($"invalid when: unknown type {name.Value}");
            }
        }

        parser.Consume<MappingEnd>();
        return when;
    }

    public void WriteYaml(IEmitter emitter, object? value, Type type) {
        throw new NotImplementedException();
    }
}