package se.bilhalsning.security;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.Optional;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import se.bilhalsning.entity.User;
import se.bilhalsning.repository.UserRepository;

@ExtendWith(MockitoExtension.class)
class UserDetailsServiceImplTest {

    @Mock
    private UserRepository userRepository;

    @InjectMocks
    private UserDetailsServiceImpl userDetailsService;

    @Test
    void shouldReturnUserDetailsWhenUserExists() {
        User user = new User();
        user.setEmail("test@example.com");
        user.setPasswordHash("hashed-password");
        when(userRepository.findByEmail("test@example.com")).thenReturn(Optional.of(user));

        UserDetails result = userDetailsService.loadUserByUsername("test@example.com");

        assertEquals("test@example.com", result.getUsername());
        assertEquals("hashed-password", result.getPassword());
    }

    @Test
    void shouldThrowUsernameNotFoundExceptionWhenUserMissing() {
        when(userRepository.findByEmail(anyString())).thenReturn(Optional.empty());

        assertThrows(UsernameNotFoundException.class, () ->
                userDetailsService.loadUserByUsername("missing@example.com"));
    }

    @Test
    void shouldNormalizeEmailToLowercase() {
        User user = new User();
        user.setEmail("uppercase@example.com");
        user.setPasswordHash("hashed-password");
        when(userRepository.findByEmail("uppercase@example.com")).thenReturn(Optional.of(user));

        userDetailsService.loadUserByUsername("UPPERCASE@EXAMPLE.COM");

        verify(userRepository).findByEmail("uppercase@example.com");
    }
}