using GermanApp.Application.DTOs.Auth;
using GermanApp.Domain.Entities;

namespace GermanApp.Application.Interfaces;

/// <summary>
/// Interface for authentication services.
/// Part of the Application layer.
/// </summary>
public interface IAuthService
{
    /// <summary>
    /// Registers a new user.
    /// </summary>
    /// <param name="registerDto">User registration data</param>
    /// <returns>Authentication response with token</returns>
    Task<AuthResponse> RegisterAsync(RegisterDto registerDto);

    /// <summary>
    /// Authenticates a user and returns a JWT token.
    /// </summary>
    /// <param name="loginDto">User login data</param>
    /// <returns>Authentication response with token</returns>
    Task<AuthResponse> LoginAsync(LoginDto loginDto);

    /// <summary>
    /// Gets the current authenticated user.
    /// </summary>
    /// <param name="userId">User ID from token claims</param>
    /// <returns>The user entity</returns>
    Task<User?> GetCurrentUserAsync(int userId);
}