using System;
using System.Globalization;
using System.Threading.Tasks;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Settings;
using Volo.Abp.Timing;
using Volo.Abp.MultiTenancy;
using Microsoft.Extensions.Options;

namespace Kurs.Platform.Localization
{
    public class TenantLocalizationInitializer : ITransientDependency
    {
        private readonly ISettingProvider _settingProvider;
        private readonly ICurrentTenant _currentTenant;
        private readonly IOptions<AbpClockOptions> _clockOptions;

        public TenantLocalizationInitializer(
            ISettingProvider settingProvider,
            ICurrentTenant currentTenant,
            IOptions<AbpClockOptions> clockOptions)
        {
            _settingProvider = settingProvider;
            _currentTenant = currentTenant;
            _clockOptions = clockOptions;
        }

        public async Task ApplyTenantSettingsAsync()
        {
            // Dil ayarı
            var lang = await _settingProvider.GetOrNullAsync("Abp.Localization.DefaultLanguage") ?? "en";
            try
            {
                var culture = new CultureInfo(lang);
                CultureInfo.DefaultThreadCurrentCulture = culture;
                CultureInfo.DefaultThreadCurrentUICulture = culture;
            }
            catch
            {
                CultureInfo.DefaultThreadCurrentCulture = CultureInfo.InvariantCulture;
                CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.InvariantCulture;
            }

            // Saat tipi (UTC / Local)
            var timeZoneId = await _settingProvider.GetOrNullAsync("Abp.Timing.TimeZone") ?? "UTC";
            try
            {
                var tz = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
                _clockOptions.Value.Kind = tz.Id.Contains("UTC", StringComparison.OrdinalIgnoreCase)
                    ? DateTimeKind.Utc
                    : DateTimeKind.Local;
            }
            catch
            {
                _clockOptions.Value.Kind = DateTimeKind.Utc;
            }
        }
    }
}