using System;
using System.Threading.Tasks;
using Volo.Abp;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Localization;
using Volo.Abp.Settings;

namespace Sozsoft.Notifications.Domain;

/// <summary>
/// Bildirim metninin (tarih, sayi, dil anahtari) uretildigi kultur. Istek disinda (worker) is
/// parcaciginin kulturu surec varsayilanidir; alicinin kendi dil tercihi platformda saklanmaz
/// (dil istekte <c>Accept-Language</c> ile gelir), bu yuzden ulasilabilen en yakin deger
/// kiracinin <c>Abp.Localization.DefaultLanguage</c> ayaridir (kiraci → global → varsayilan).
/// </summary>
public interface INotificationCulture
{
    Task<IDisposable> UseAsync();
}

public class NotificationCulture(ISettingProvider settingProvider) : INotificationCulture, ITransientDependency
{
    public async Task<IDisposable> UseAsync()
    {
        var culture = await settingProvider.GetOrNullAsync(LocalizationSettingNames.DefaultLanguage);
        return culture.IsNullOrWhiteSpace() || !CultureHelper.IsValidCultureCode(culture!)
            ? NullDisposable.Instance
            : CultureHelper.Use(culture!);
    }
}