using System.Threading.Tasks;
using Jellyfin.Plugin.WatchedTogether.Configuration;

namespace Jellyfin.Plugin.WatchedTogether.Services;

/// <summary>
/// Creates shared accounts on demand from a separator-joined username typed at the login screen.
/// </summary>
public interface IDynamicGroupService
{
    /// <summary>
    /// Attempts to authenticate a not-yet-existing shared account named like "alice+bob", creating
    /// it if the submitted password belongs to one of the named members.
    /// </summary>
    /// <param name="enteredUsername">The username typed at the login screen.</param>
    /// <param name="password">The submitted password.</param>
    /// <returns>
    /// The created group and the shared account's username, or <c>null</c> if the name is not a
    /// valid member combination or no named member's password matched.
    /// </returns>
    Task<DynamicGroupResult?> TryCreateFromLoginAsync(string enteredUsername, string password);
}

/// <summary>
/// The outcome of a successful on-demand group creation.
/// </summary>
/// <param name="Group">The group that was created.</param>
/// <param name="SharedUsername">The username of the shared account.</param>
public record DynamicGroupResult(SharedGroup Group, string SharedUsername);