EnvelopeGenerator/EnvelopeGenerator.Infrastructure.Notification/DependencyInjection.cs

using DigitalData.MessagingService.Client;
using EnvelopeGenerator.Application.Common.Interfaces.Services.Notification;
using EnvelopeGenerator.Infrastructure.Notification.Configuration;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace EnvelopeGenerator.Infrastructure.Notification;

public static class DependencyInjection
{
    public static IServiceCollection AddNotificationInfrastructure(this IServiceCollection services, IConfiguration configuration, string sectionName = NotificationOptions.SectionName)
    {
        var ntfConfiguration = configuration.GetSection(sectionName);
        services.Configure<NotificationOptions>(ntfConfiguration);

        var options = ntfConfiguration.Get<NotificationOptions>()
            ?? throw new InvalidOperationException(
                $"Failed to bind configuration section '{sectionName}' to {nameof(NotificationOptions)}. Ensure the section exists and is correctly configured.");

        switch (options.ConsumerType)
        {
            case ConsumerType.API:
                if (options.ApiUrl is string apiUrl)
                    services.AddMessagingServiceHttpClient(opt =>
                    {
                        opt.BaseAddress = new Uri(apiUrl);
                        // Additional configuration for the MessagingServiceHttpClient can be added here if needed
                    });
                else
                    throw new InvalidOperationException(
                        $"MessagingServiceApiUrl must be provided when ClientType is set to Api in the '{sectionName}' configuration section.");
                break;
            case ConsumerType.RabbitMQ:
                if(options.RabbitMQ is not null)
                    services.AddMessagingServiceClient(ntfConfiguration, nameof(options.RabbitMQ));
                else
                    throw new InvalidOperationException(
                        $"Missing RabbitMQ connection configuration." +
                        $"When ClientType is set to RabbitMQ, a valid RabbitMQ configuration must be provided in the '{sectionName}' configuration section.");
                break;
            default:
                throw new InvalidOperationException(
                    $"Unsupported ConsumerType '{options.ConsumerType}' in the '{sectionName}' configuration section.");
        }

        services.AddScoped<IEnvelopeNotificationService, EnvelopeNotificationService>();
        return services;
    }
}