using YamlDotNet.Serialization;
using YamlDotNet.Serialization.NamingConventions;
using Settings = VirtualDDNSRouter.Client.Models.Settings;

namespace VirtualDDNSRouter.Client.Helpers;

public class Helpers
{
    private static readonly string YamlFilePath = "settings.yaml";

    public static async Task<Settings> GetSettings()
    {
        if (!File.Exists(YamlFilePath))
            throw new FileNotFoundException($"Settings file not found: {YamlFilePath}");

        var yamlContent = await File.ReadAllTextAsync(YamlFilePath).ConfigureAwait(false);

        // Build the deserializer with explicit naming convention
        var deserializer = new StaticDeserializerBuilder(new YamlStaticContext())
            .WithNamingConvention(UnderscoredNamingConvention.Instance)
            .IgnoreUnmatchedProperties()
            .Build();

        // Deserialize into Settings
        var settings = deserializer.Deserialize<Settings>(yamlContent);

        if (settings is null || string.IsNullOrWhiteSpace(settings.Host) || string.IsNullOrWhiteSpace(settings.Path) ||
            string.IsNullOrWhiteSpace(settings.ApiKey))
            throw new Exception("Invalid settings file");

        return settings;
    }

    [YamlStaticContext]
    [YamlSerializable(typeof(Settings))]
    private partial class YamlStaticContext : StaticContext
    {
    }
}