package fr.tiogars.domaintemplate.domains.auth.services;
   
   import org.springframework.security.authentication.AuthenticationManager;
   import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
   import org.springframework.security.core.userdetails.UserDetails;
   import org.springframework.stereotype.Service;
   
   import fr.tiogars.domaintemplate.domains.auth.models.LoginRequest;
   import fr.tiogars.domaintemplate.domains.auth.models.LoginResponse;
  import fr.tiogars.domaintemplate.domains.auth.user.entities.User;
  import fr.tiogars.domaintemplate.domains.auth.user.services.UserService;
  
  /** Authenticates credentials and issues JWT access tokens. */
  @Service
  public class AuthService {
  
      private final AuthenticationManager authenticationManager;
      private final JwtTokenService jwtTokenService;
      private final UserService userService;
  
      AuthService(AuthenticationManager authenticationManager, JwtTokenService jwtTokenService, UserService userService) {
          this.authenticationManager = authenticationManager;
          this.jwtTokenService = jwtTokenService;
          this.userService = userService;
      }
  
      public LoginResponse login(LoginRequest request) {
          UserDetails principal = (UserDetails) authenticationManager.authenticate(
                  new UsernamePasswordAuthenticationToken(request.username(), request.password())).getPrincipal();
          User user = userService.findByUsername(principal.getUsername()).orElseThrow();
          return new LoginResponse(
                  jwtTokenService.generateToken(principal),
                  "Bearer",
                  jwtTokenService.expiresAt(),
                  user);
      }
  }