using DigitalData.MessagingService.Application.Common.Interfaces;
using DigitalData.MessagingService.Infrastructure.Queue;
using DigitalData.MessagingService.Infrastructure.Services;
using DigitalData.MessagingService.Infrastructure.Services.Background;
using DigitalData.MessagingService.Publisher;
using DigitalData.MessagingService.RabbitMQ;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace DigitalData.MessagingService.Infrastructure;

/// <summary>
/// Dependency injection configuration for Infrastructure layer
/// </summary>
public static class DependencyInjection
{
    /// <summary>
    /// Adds Infrastructure layer services to the DI container
    /// </summary>
    public static IServiceCollection AddInfrastructure(
        this IServiceCollection services,
        IConfiguration configuration)
    {
        // --- External Services ---
        // Email Service (using Limilabs Mail.dll - Singleton for use in EmailSenderWorker)
        services.AddSingleton<IEmailService, LimilabsEmailService>();
        
        // PDF Processing Service (using DevExpress.Pdf)
        services.AddScoped<IPdfProcessingService, DevExpressPdfProcessingService>();
        
        // Encryption Service (using Data Protection API - Singleton, thread-safe)
        services.AddSingleton<IEncryptionService, DataProtectionEncryptionService>();

        // --- Email Queue (RabbitMQ) ---
        services.AddSingleton<SendingEmailConsumer>();
        services.AddMessagingServicePublisher();

        // --- RabbitMQ Configuration ---
        services.AddRabbitMqConnectionFactory(configuration);

        // --- Data Protection (for encryption) ---
        services.AddDataProtection()
            .PersistKeysToFileSystem(new DirectoryInfo(@"C:\ProgramData\EmailService\Keys"))
            .SetApplicationName("MessagingService");

        // Register Background Workers
        services.AddHostedService<AsyncInitWorker>();

        return services;
    }
}