package com.mydreamjob.auth;

import com.mydreamjob.audit.AuditService;
import com.mydreamjob.auth.sms.SmsCodeSender;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
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 org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Optional;

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

@ExtendWith(MockitoExtension.class)
class SmsVerificationServiceTest {

    @Mock
    private SmsVerificationCodeRepository codeRepository;

    @Mock
    private RedisTemplate<String, Object> redisTemplate;

    @Mock
    private ValueOperations<String, Object> valueOperations;

    @Mock
    private AuditService auditService;

    @Mock
    private SmsCodeSender smsCodeSender;

    @InjectMocks
    private SmsVerificationService smsVerificationService;

    @BeforeEach
    void setUp() {
        lenient().when(redisTemplate.opsForValue()).thenReturn(valueOperations);
    }

    @Test
    void sendCode_shouldSucceed() {
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        when(codeRepository.save(any())).thenReturn(null);

        assertDoesNotThrow(() -> smsVerificationService.sendCode("13800000001", "login", null, null, null));
        verify(codeRepository, times(1)).save(any());
        verify(valueOperations, times(1)).set(anyString(), any(), anyLong(), any());
    }

    @Test
    void sendCode_shouldThrowWhenRateLimited() {
        when(redisTemplate.hasKey(eq("sms:lockout:13800000001"))).thenReturn(true);

        BusinessException ex = assertThrows(BusinessException.class,
                () -> smsVerificationService.sendCode("13800000001", "login", null, null, null));
        assertEquals(ErrorCode.SMS_RATE_LIMITED.getCode(), ex.getErrorCodeInt());
    }

    // ---- verifyCode tests ----

    @Test
    void verifyCode_success_withPurpose() {
        SmsVerificationCode code = buildCode("13800000001", "123456", "login", false);
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "login"))
                .thenReturn(java.util.stream.Stream.of(code));
        when(codeRepository.consumeIfValid(any(), any())).thenReturn(1);

        assertDoesNotThrow(() -> smsVerificationService.verifyCode("13800000001", "123456", "login"));
        verify(codeRepository, times(1)).consumeIfValid(any(), any());
    }

    @Test
    void verifyCode_replayMustFail_afterUsed() {
        SmsVerificationCode code = buildCode("13800000001", "123456", "login", false);
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        // 第一次验证通过后 used=true
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "login"))
                .thenReturn(java.util.stream.Stream.of(code));
        when(codeRepository.consumeIfValid(any(), any())).thenReturn(1);

        // 第一次成功
        smsVerificationService.verifyCode("13800000001", "123456", "login");

        // 第二次重放：已使用的验证码不应再查到（used=true 的不在查询结果中）
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "login"))
                .thenReturn(java.util.stream.Stream.empty());

        BusinessException ex = assertThrows(BusinessException.class,
                () -> smsVerificationService.verifyCode("13800000001", "123456", "login"));
        assertEquals(ErrorCode.SMS_CODE_INVALID.getCode(), ex.getErrorCodeInt());
    }

    @Test
    void verifyCode_purposeMismatchMustFail() {
        SmsVerificationCode code = buildCode("13800000001", "123456", "login", false);
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        // 查询 password-reset 用途，但实际只有 login 的记录
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "password-reset"))
                .thenReturn(java.util.stream.Stream.empty());

        BusinessException ex = assertThrows(BusinessException.class,
                () -> smsVerificationService.verifyCode("13800000001", "123456", "password-reset"));
        assertEquals(ErrorCode.SMS_CODE_INVALID.getCode(), ex.getErrorCodeInt());
    }

    @Test
    void verifyCode_usedCodeMustFail_directly() {
        SmsVerificationCode code = buildCode("13800000001", "123456", "login", true);
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "login"))
                .thenReturn(java.util.stream.Stream.empty());

        BusinessException ex = assertThrows(BusinessException.class,
                () -> smsVerificationService.verifyCode("13800000001", "123456", "login"));
        assertEquals(ErrorCode.SMS_CODE_INVALID.getCode(), ex.getErrorCodeInt());
    }

    @Test
    void verifyCode_latestPriority_returnsNewestOnly() {
        LocalDateTime oldTime = LocalDateTime.now().minusMinutes(5);
        LocalDateTime newTime = LocalDateTime.now().minusMinutes(1);

        SmsVerificationCode oldCode = SmsVerificationCode.builder()
                .phone("13800000001").code("999999").purpose("login")
                .expiredAt(newTime.plusMinutes(5)).attempts(0).used(false).createdAt(oldTime).build();
        SmsVerificationCode newCode = SmsVerificationCode.builder()
                .phone("13800000001").code("123456").purpose("login")
                .expiredAt(newTime.plusMinutes(5)).attempts(0).used(false).createdAt(newTime).build();

        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        // repository 按 createdAt DESC 返回，第一个是最新的
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose("13800000001", "login"))
                .thenReturn(java.util.stream.Stream.of(newCode));
        when(codeRepository.consumeIfValid(any(), any())).thenReturn(1);

        assertDoesNotThrow(() -> smsVerificationService.verifyCode("13800000001", "123456", "login"));
        // 旧验证码 999999 不应被验证通过
        verify(codeRepository, never()).save(oldCode);
    }

    @Test
    void verifyCode_noRecordMustFail() {
        when(redisTemplate.hasKey(anyString())).thenReturn(false);
        when(codeRepository.streamLatestUnusedByPhoneAndPurpose(any(), any()))
                .thenReturn(java.util.stream.Stream.empty());

        BusinessException ex = assertThrows(BusinessException.class,
                () -> smsVerificationService.verifyCode("13800000001", "123456", "login"));
        assertEquals(ErrorCode.SMS_CODE_INVALID.getCode(), ex.getErrorCodeInt());
    }

    private SmsVerificationCode buildCode(String phone, String code, String purpose, boolean used) {
        return SmsVerificationCode.builder()
                .phone(phone).code(code).purpose(purpose)
                .expiredAt(LocalDateTime.now().plusMinutes(5))
                .attempts(0).maxAttempts(5).used(used)
                .createdAt(LocalDateTime.now()).build();
    }
}