Cleanuparr/code/Infrastructure/Verticals/DownloadClient/DownloadServiceFactory.cs

using Common.Configuration;
using Common.Enums;
using Infrastructure.Verticals.DownloadClient.Deluge;
using Infrastructure.Verticals.DownloadClient.QBittorrent;
using Infrastructure.Verticals.DownloadClient.Transmission;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace Infrastructure.Verticals.DownloadClient;

/// <summary>
/// Factory responsible for creating download client service instances
/// </summary>
public sealed class DownloadServiceFactory
{
    private readonly IServiceProvider _serviceProvider;
    private readonly ILogger<DownloadServiceFactory> _logger;
    
    public DownloadServiceFactory(
        IServiceProvider serviceProvider, 
        ILogger<DownloadServiceFactory> logger)
    {
        _serviceProvider = serviceProvider;
        _logger = logger;
    }

    // /// <summary>
    // /// Creates a download service using the specified client ID
    // /// </summary>
    // /// <param name="clientId">The client ID to create a service for</param>
    // /// <returns>An implementation of IDownloadService or null if the client is not available</returns>
    // public IDownloadService? GetDownloadService(Guid clientId)
    // {
    //     var config = _configManager.GetConfiguration<DownloadClientConfig>();
    //     var clientConfig = config.GetClientConfig(clientId);
    //     
    //     if (clientConfig == null)
    //     {
    //         _logger.LogWarning("No download client configuration found for ID {clientId}", clientId);
    //         return null;
    //     }
    //     
    //     if (!clientConfig.Enabled)
    //     {
    //         _logger.LogWarning("Download client {clientId} is disabled", clientId);
    //         return null;
    //     }
    //     
    //     return GetDownloadService(clientConfig);
    // }
    
    /// <summary>
    /// Creates a download service using the specified client configuration
    /// </summary>
    /// <param name="downloadClientConfig">The client configuration to use</param>
    /// <returns>An implementation of IDownloadService or null if the client is not available</returns>
    public IDownloadService GetDownloadService(DownloadClientConfig downloadClientConfig)
    {
        if (!downloadClientConfig.Enabled)
        {
            _logger.LogWarning("Download client {clientId} is disabled, but a service was requested", downloadClientConfig.Id);
        }
        
        return downloadClientConfig.TypeName switch
        {
            DownloadClientTypeName.QBittorrent => CreateClientService<QBitService>(downloadClientConfig),
            DownloadClientTypeName.Deluge => CreateClientService<DelugeService>(downloadClientConfig),
            DownloadClientTypeName.Transmission => CreateClientService<TransmissionService>(downloadClientConfig),
            _ => throw new NotSupportedException($"Download client type {downloadClientConfig.TypeName} is not supported")
        };
    }
    
    /// <summary>
    /// Creates a download client service for a specific client type
    /// </summary>
    /// <typeparam name="T">The type of download service to create</typeparam>
    /// <param name="downloadClientConfig">The client configuration</param>
    /// <returns>An implementation of IDownloadService</returns>
    private T CreateClientService<T>(DownloadClientConfig downloadClientConfig) where T : IDownloadService
    {
        var service = _serviceProvider.GetRequiredService<T>();
        service.Initialize(downloadClientConfig);
        return service;
    }
}