package com.mydreamjob.auth;

import com.mydreamjob.audit.AuditContext;
import com.mydreamjob.audit.AuditService;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
import com.mydreamjob.deletion.AccountDeletion;
import com.mydreamjob.deletion.AccountDeletionPhoneHasher;
import com.mydreamjob.deletion.AccountDeletionRepository;
import com.mydreamjob.deletion.DeletionStatus;
import org.junit.jupiter.api.BeforeEach;
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 java.time.Clock;
import java.time.Instant;
import java.time.LocalDateTime;
import java.util.Map;
import java.util.Optional;

import static org.junit.jupiter.api.Assertions.*;
import static org.mockito.ArgumentMatchers.*;
import static org.mockito.Mockito.*;

/**
 * S02 {@link AuthService} 单元测试。
 *
 * <p>登录链路改为「验证码校验 → 用户解析 → 创建服务端会话」，因此 Mockito 目标
 * 由旧的 {@code JwtTokenProvider} 换成 {@link AuthSessionService}；
 * 原有断言语义（响应字段、自动建号、注销墓碑、验证码用途透传）保持不变。</p>
 */
@ExtendWith(MockitoExtension.class)
class AuthServiceTest {

    private static final Instant FIXED_NOW = Instant.parse("2026-09-14T02:00:00Z");

    @Mock
    private UserRepository userRepository;

    @Mock
    private AuthSessionService authSessionService;

    @Mock
    private SmsVerificationService smsVerificationService;

    @Mock
    private AuditService auditService;

    @Mock
    private AccountDeletionRepository accountDeletionRepository;

    @Mock
    private AccountDeletionPhoneHasher accountDeletionPhoneHasher;

    @Mock
    private Clock clock;

    @InjectMocks
    private AuthService authService;

    private void stubSessionIssuance() {
        when(clock.instant()).thenReturn(FIXED_NOW);
        when(authSessionService.createSession(any(), any(), any()))
                .thenReturn(new AuthSessionService.SessionTokens("access-token", "refresh-token", "sid-1"));
    }

    @Test
    void mockLogin_shouldReturnTokenWhenCodeValid() {
        User user = User.builder()
                .id(1L).phone("13800000001").nickname("测试用户")
                .role(User.Role.STUDENT).active(true).verified(true).build();

        when(smsVerificationService.verifyCode("13800000001", "123456", "login")).thenReturn(true);
        when(userRepository.findByPhone("13800000001")).thenReturn(Optional.of(user));
        stubSessionIssuance();

        Map<String, Object> result = authService.mockLogin("13800000001", "123456", "login", "req-1", "10.0.0.1", "JUnit");

        assertEquals("access-token", result.get("accessToken"));
        assertEquals("refresh-token", result.get("refreshToken"));
        assertEquals(1L, result.get("userId"));
        // expiresIn 契约保持不变（设计 D04）
        assertEquals(86400L, result.get("expiresIn"));
        // 登录审计仍写入，且时间来自入口单次捕获的 capturedNow
        verify(auditService, times(1)).log(eq(1L), eq("LOGIN"), eq("USER"), eq(1L),
                eq("User logged in"), any(AuditContext.class),
                eq(LocalDateTime.ofInstant(FIXED_NOW, AuthSessionService.BUSINESS_ZONE)));
    }

    @Test
    void mockLogin_shouldCreateUserWhenNotFound() {
        when(smsVerificationService.verifyCode("13800000099", "123456", "login")).thenReturn(true);
        when(userRepository.findByPhone("13800000099")).thenReturn(Optional.empty());
        when(userRepository.save(any())).thenAnswer(invocation -> {
            User u = invocation.getArgument(0);
            u.setId(99L);
            return u;
        });
        stubSessionIssuance();

        Map<String, Object> result = authService.mockLogin("13800000099", "123456", "login", null, null, null);

        assertEquals(99L, result.get("userId"));
        assertEquals(User.Role.STUDENT, result.get("role"));
    }

    @Test
    void mockLogin_shouldPropagatePurposeToVerifyCode() {
        when(smsVerificationService.verifyCode("13800000001", "123456", "password-reset"))
                .thenReturn(true);
        User user = User.builder().id(1L).phone("13800000001").role(User.Role.STUDENT).active(true).verified(true).build();
        when(userRepository.findByPhone("13800000001")).thenReturn(Optional.of(user));
        stubSessionIssuance();

        authService.mockLogin("13800000001", "123456", "password-reset", null, null, null);
        verify(smsVerificationService, times(1)).verifyCode("13800000001", "123456", "password-reset");
    }

    @Test
    void mockLogin_shouldThrowWhenCodeInvalid() {
        when(smsVerificationService.verifyCode(any(), any(), any()))
                .thenThrow(new BusinessException(ErrorCode.SMS_CODE_INVALID));

        assertThrows(BusinessException.class,
                () -> authService.mockLogin("13800000001", "000000", "login", null, null, null));
        // 验证码失败不得创建任何会话
        verify(authSessionService, never()).createSession(any(), any(), any());
    }

    @Test
    void mockLogin_shouldBlockReRegistrationOfDeletedPhone() {
        when(smsVerificationService.verifyCode("13800000001", "123456", "login")).thenReturn(true);
        when(accountDeletionPhoneHasher.hash("13800000001")).thenReturn("deadbeef");
        AccountDeletion tomb = AccountDeletion.builder()
                .userId(1L).status(DeletionStatus.COMPLETED).deletedPhoneHash("deadbeef").build();
        when(accountDeletionRepository.findByDeletedPhoneHash("deadbeef")).thenReturn(Optional.of(tomb));

        BusinessException ex = assertThrows(BusinessException.class,
                () -> authService.mockLogin("13800000001", "123456", "login", null, null, null));
        assertEquals(ErrorCode.ACCOUNT_DELETED.getCode(), ex.getErrorCodeInt());
        // 不得自动创建新用户
        verify(userRepository, never()).save(any());
        verify(authSessionService, never()).createSession(any(), any(), any());
    }

    @Test
    void getCurrentUser_shouldThrowWhenUserNotFound() {
        when(userRepository.findById(999L)).thenReturn(Optional.empty());

        BusinessException ex = assertThrows(BusinessException.class,
                () -> authService.getCurrentUser(999L));
        assertEquals(ErrorCode.USER_NOT_FOUND.getCode(), ex.getErrorCodeInt());
    }
}