using SIGCM.Application.Interfaces;
using SIGCM.Domain.Interfaces;

namespace SIGCM.Infrastructure.Services;

public class AuthService : IAuthService
{
    private readonly IUserRepository _userRepo;
    private readonly ITokenService _tokenService;

    public AuthService(IUserRepository userRepo, ITokenService tokenService)
    {
         _userRepo = userRepo;
         _tokenService = tokenService;
    }

    public async Task<string?> LoginAsync(string username, string password)
    {
        var user = await _userRepo.GetByUsernameAsync(username);
        if (user == null) return null;
        
        bool valid = BCrypt.Net.BCrypt.Verify(password, user.PasswordHash);
        if (!valid) return null;

        return _tokenService.GenerateToken(user);
    }
}