using System;
using Jellyfin.Plugin.WatchedTogether.Auth;
using Jellyfin.Plugin.WatchedTogether.Services;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Authentication;
using MediaBrowser.Controller.Plugins;
using Microsoft.Extensions.DependencyInjection;

namespace Jellyfin.Plugin.WatchedTogether;

/// <summary>
/// Registers the plugin's services with the host.
/// </summary>
public class ServiceRegistrator : IPluginServiceRegistrator
{
    /// <inheritdoc />
    public void RegisterServices(IServiceCollection serviceCollection, IServerApplicationHost applicationHost)
    {
        serviceCollection.AddSingleton<IGroupService, GroupService>();
        serviceCollection.AddSingleton<ILibraryAccessService, LibraryAccessService>();
        serviceCollection.AddSingleton<IProvisioningService, ProvisioningService>();
        serviceCollection.AddSingleton<IDynamicGroupService, DynamicGroupService>();

        // The auth provider takes these lazily so the container can build it while IUserManager is
        // still under construction; see SharedAccountAuthenticationProvider's constructor remarks.
        // Microsoft's container has no built-in Lazy<T> support, so the factories are explicit.
        serviceCollection.AddSingleton(
            provider => new Lazy<IGroupService>(provider.GetRequiredService<IGroupService>));
        serviceCollection.AddSingleton(
            provider => new Lazy<IDynamicGroupService>(provider.GetRequiredService<IDynamicGroupService>));

        // Discovered by Jellyfin and matched to shared accounts via User.AuthenticationProviderId.
        serviceCollection.AddSingleton<IAuthenticationProvider, SharedAccountAuthenticationProvider>();

        serviceCollection.AddHostedService<WatchedStateSyncService>();
        serviceCollection.AddHostedService<UserLifecycleService>();
    }
}