using ComplianceNFs.Core.Entities;
using ComplianceNFs.Core.Application;
using ComplianceNFs.Core.Application.Services;

namespace ComplianceNFs.Service;

public class Worker(ILogger<Worker> logger,
    IInvoiceIngestionService ingestionService,
    IMatchingService matchingService,
    IComplianceService complianceService,
    INotificationService notificationService,
    IArchivingService archivingService) : BackgroundService
{
    private readonly ILogger<Worker> _logger = logger;
    private readonly IInvoiceIngestionService _ingestionService = ingestionService;
    private readonly IMatchingService _matchingService = matchingService;
    private readonly IComplianceService _complianceService = complianceService;
    private readonly INotificationService _notificationService = notificationService;
    private readonly IArchivingService _archivingService = archivingService;

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _logger.LogInformation("Worker starting at: {time}", DateTimeOffset.Now);
        // Start mail ingestion (starts listening for new mail)
        await _ingestionService.IngestAsync();
        // Subscribe to new invoice events and orchestrate workflow
        if (_ingestionService is InvoiceIngestionService ingestionImpl)
        {
            ingestionImpl.InvoiceProcessed += async invoice =>
            {
                // 1. Match invoice
                await _matchingService.MatchAsync(invoice);
                // 2. Compliance validation
                await _complianceService.ValidateAsync(invoice);
                // 3. Notify if needed
                if (invoice.Status == InvoiceStatus.TaxMismatch || invoice.Status == InvoiceStatus.VolumeMismatch || invoice.Status == InvoiceStatus.PriceMismatch)
                {
                    await _notificationService.NotifyAsync(invoice, invoice.DiscrepancyNotes ?? "Discrepancy detected");
                }
                // 4. Archive
                // (Assume raw file is available or can be loaded if needed)
                // await _archivingService.ArchiveAsync(invoice, rawFile);
                _logger.LogInformation("Invoice {NumeroNF} processed with status: {Status}", invoice.NumeroNF, invoice.Status);
            };
        }
        // Keep the worker alive
        while (!stoppingToken.IsCancellationRequested)
        {
            await Task.Delay(1000, stoppingToken);
        }
    }
}