using System.Globalization;
using System.Text.Json.Nodes;
using Remora.Results;

namespace TeamOctolings.Octobot.Data.Options;

/// <inheritdoc />
public sealed class LanguageOption : GuildOption<CultureInfo>
{
    private static readonly Dictionary<string, CultureInfo> CultureInfoCache = new()
    {
        { "en", new CultureInfo("en-US") },
        { "ru", new CultureInfo("ru-RU") }
    };

    public LanguageOption(string name, string defaultValue) : base(name, CultureInfoCache[defaultValue]) { }

    protected override string Value(JsonNode settings)
    {
        return settings[Name]?.GetValue<string>() ?? "en";
    }

    /// <inheritdoc />
    public override CultureInfo Get(JsonNode settings)
    {
        var property = settings[Name];
        return property != null ? CultureInfoCache[property.GetValue<string>()] : DefaultValue;
    }

    /// <inheritdoc />
    public override Result Set(JsonNode settings, string from)
    {
        return CultureInfoCache.ContainsKey(from.ToLowerInvariant())
            ? base.Set(settings, from.ToLowerInvariant())
            : new ArgumentInvalidError(nameof(from), Messages.LanguageNotSupported);
    }
}