using HealthManager.Application.Services;
using Microsoft.EntityFrameworkCore;

namespace HealthManager.WebApi.Services;

public class CleanupBackgroundService(
    IServiceScopeFactory scopeFactory) : BackgroundService
{
    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            try
            {
                using var scope = scopeFactory.CreateScope();
                var verification = scope.ServiceProvider.GetRequiredService<VerificationService>();
                var tokenBlacklist = scope.ServiceProvider.GetRequiredService<TokenBlacklistService>();

                await verification.CleanupExpiredAsync();
                await tokenBlacklist.CleanupExpiredAsync();

                var db = scope.ServiceProvider.GetRequiredService<Infrastructure.Data.AppDbContext>();
                await db.RateLimitEntries.Where(r => r.ExpiresAt < DateTime.UtcNow).ExecuteDeleteAsync(stoppingToken);
                await db.CacheEntries.Where(c => c.ExpiresAt < DateTime.UtcNow).ExecuteDeleteAsync(stoppingToken);
            }
            catch { /* skip cleanup errors */ }

            await Task.Delay(TimeSpan.FromMinutes(5), stoppingToken);
        }
    }
}