package com.mydreamjob.messaging;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mydreamjob.audit.AuditContext;
import com.mydreamjob.audit.AuditLog;
import com.mydreamjob.audit.AuditLogRepository;
import com.mydreamjob.auth.User;
import com.mydreamjob.auth.UserRepository;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
import com.mydreamjob.messaging.dto.MessageResponse;
import com.mydreamjob.safety.BlockRelationRepository;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import jakarta.persistence.EntityManager;
import jakarta.persistence.EntityManagerFactory;
import jakarta.persistence.OptimisticLockException;
import org.springframework.dao.DataAccessException;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.domain.Page;
import org.springframework.test.context.ActiveProfiles;

import java.time.LocalDateTime;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.*;

@SpringBootTest
@ActiveProfiles("integration-test")
class MessageRecallPersistenceIntegrationTest {

    @Autowired private MessagingService messagingService;
    @Autowired private UserRepository userRepository;
    @Autowired private ConversationRepository conversationRepository;
    @Autowired private ConversationMemberRepository memberRepository;
    @Autowired private MessageRepository messageRepository;
    @Autowired private MessageReadRepository readRepository;
    @Autowired private AuditLogRepository auditLogRepository;
    @Autowired private BlockRelationRepository blockRelationRepository;
    @Autowired private JdbcTemplate jdbcTemplate;
    @Autowired private EntityManager entityManager;
    @Autowired private EntityManagerFactory entityManagerFactory;
    @Autowired private ObjectMapper objectMapper;
    @MockBean private RedisTemplate<String, Object> redisTemplate;

    private Long sender;
    private Long receiver;
    private Long conversation;
    private Long message;
    private Long candidateScoreStudent;

    @AfterEach
    void cleanup() {
        if (candidateScoreStudent != null) {
            jdbcTemplate.update("DELETE FROM candidate_dimension_scores WHERE student_user_id=?", candidateScoreStudent);
            candidateScoreStudent = null;
        }
        if (message != null) readRepository.deleteAll();
        messageRepository.deleteAll();
        memberRepository.deleteAll();
        blockRelationRepository.deleteAll();
        conversationRepository.deleteAll();
        auditLogRepository.deleteAll();
        if (sender != null || receiver != null) {
            if (sender != null) {
                jdbcTemplate.update("DELETE FROM scoring_risk_actions WHERE operator_user_id=?", sender);
                jdbcTemplate.update("DELETE FROM scoring_risk_events WHERE subject_user_id=?", sender);
                jdbcTemplate.update("DELETE FROM notifications WHERE user_id=?", sender);
            }
            if (receiver != null) {
                jdbcTemplate.update("DELETE FROM scoring_risk_actions WHERE operator_user_id=?", receiver);
                jdbcTemplate.update("DELETE FROM scoring_risk_events WHERE subject_user_id=?", receiver);
                jdbcTemplate.update("DELETE FROM notifications WHERE user_id=?", receiver);
            }
        }
        userRepository.deleteAll();
    }

    private void fixture(LocalDateTime createdAt) {
        sender = userRepository.save(user("sender")).getId();
        receiver = userRepository.save(user("receiver")).getId();
        conversation = conversationRepository.save(Conversation.builder().type("DIRECT").createdBy(sender).build()).getId();
        memberRepository.save(ConversationMember.builder().conversationId(conversation).userId(sender).build());
        memberRepository.save(ConversationMember.builder().conversationId(conversation).userId(receiver).build());
        Message saved = messageRepository.saveAndFlush(Message.builder().conversationId(conversation).senderUserId(sender)
                .content("secret-body").status("SENT").version(0L).createdAt(createdAt).build());
        message = saved.getId();
        // Auditing may refresh @CreatedDate on update; force the deterministic boundary in the fixture only.
        jdbcTemplate.update("UPDATE messages SET created_at=? WHERE id=?", createdAt, message);
        entityManager.clear();
    }

    private User user(String name) {
        return User.builder().phone("139" + Math.abs(System.nanoTime() % 1_000_000_000L))
                .nickname(name).role(User.Role.STUDENT).roles(Set.of(User.Role.STUDENT))
                .active(true).verified(true).build();
    }

    @Test
    void migrationFieldsAndConditionalUpdatePersistRecall() {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        LocalDateTime recalledAt = created.plusMinutes(2);
        fixture(created);

        MessageResponse response = messagingService.recallMessage(sender, conversation, message, null, recalledAt);
        Message persisted = messageRepository.findById(message).orElseThrow();

        assertEquals("RECALLED", persisted.getStatus());
        assertEquals(MessageViewMapper.RECALLED_PLACEHOLDER, persisted.getContent());
        assertEquals(recalledAt, persisted.getRecalledAt());
        assertEquals(1L, persisted.getVersion());
        assertEquals(MessageViewMapper.RECALLED_PLACEHOLDER, response.getContent());
        assertEquals(1, auditLogRepository.findAll().stream()
                .filter(a -> "MESSAGE_RECALLED".equals(a.getAction()) && message.equals(a.getEntityId())).count());
        assertFalse(auditLogRepository.findAll().stream()
                .filter(a -> "MESSAGE_RECALLED".equals(a.getAction()))
                .anyMatch(a -> a.getDetails() != null && a.getDetails().contains("secret-body")));
    }

    @Test
    void messageRecallAuditStoresRequestIdButNotIpOrUserAgent() throws Exception {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        AuditContext context = AuditContext.builder()
                .requestId("recall-audit-1")
                .ipAddress("127.0.0.66")
                .userAgent("N07-secret-agent")
                .build();

        messagingService.recallMessage(sender, conversation, message, context, created.plusMinutes(1));

        AuditLog audit = auditLogRepository.findAll().stream()
                .filter(a -> "MESSAGE_RECALLED".equals(a.getAction()) && message.equals(a.getEntityId()))
                .findFirst().orElseThrow();
        assertEquals("recall-audit-1", audit.getRequestId());
        assertNull(audit.getIpAddress());
        assertNull(audit.getUserAgent());
        JsonNode details = objectMapper.readTree(audit.getDetails());
        java.util.Set<String> fields = new java.util.HashSet<>();
        details.fieldNames().forEachRemaining(fields::add);
        assertEquals(java.util.Set.of("messageId", "conversationId", "conversationType", "status", "requestId"), fields);
        assertEquals(message.longValue(), details.get("messageId").longValue());
        assertEquals(conversation.longValue(), details.get("conversationId").longValue());
        assertEquals("DIRECT", details.get("conversationType").textValue());
        assertEquals("RECALLED", details.get("status").textValue());
        assertEquals("recall-audit-1", details.get("requestId").textValue());
        assertFalse(audit.getDetails().contains("secret-body"));
        assertFalse(audit.getDetails().contains("127.0.0.66"));
        assertFalse(audit.getDetails().contains("N07-secret-agent"));
    }

    @Test
    void v41DefaultsAndStatusCheckAreEnforced() {
        fixture(LocalDateTime.of(2026, 9, 10, 10, 0));
        jdbcTemplate.update(
                "INSERT INTO messages(conversation_id, sender_user_id, content, created_at) VALUES (?, ?, ?, ?)",
                conversation, sender, "legacy-body", LocalDateTime.of(2026, 9, 10, 10, 0));
        Long legacyMessage = jdbcTemplate.queryForObject("SELECT MAX(id) FROM messages WHERE conversation_id=?",
                Long.class, conversation);
        java.util.Map<String, Object> row = jdbcTemplate.queryForMap(
                "SELECT status, recalled_at, version FROM messages WHERE id=?", legacyMessage);
        assertEquals("SENT", row.get("STATUS"));
        assertNull(row.get("RECALLED_AT"));
        assertEquals(0L, ((Number) row.get("VERSION")).longValue());

        Long finalLegacyMessage = legacyMessage;
        assertThrows(DataAccessException.class, () -> jdbcTemplate.update(
                "UPDATE messages SET status='DELETED' WHERE id=?", finalLegacyMessage));
    }

    @Test
    void optimisticVersionConflictCannotSilentlyOverwrite() {
        fixture(LocalDateTime.of(2026, 9, 10, 10, 0));
        EntityManager first = entityManagerFactory.createEntityManager();
        EntityManager second = entityManagerFactory.createEntityManager();
        jakarta.persistence.EntityTransaction tx1 = first.getTransaction();
        jakarta.persistence.EntityTransaction tx2 = second.getTransaction();
        try {
            Message firstMessage = first.find(Message.class, message);
            Message secondMessage = second.find(Message.class, message);
            tx1.begin();
            firstMessage.setContent("first-update");
            tx1.commit();

            tx2.begin();
            secondMessage.setContent("stale-update");
            RuntimeException conflict = assertThrows(RuntimeException.class, tx2::commit);
            assertTrue(hasCause(conflict, OptimisticLockException.class),
                    "stale update must be reported as an optimistic lock conflict");
            if (tx2.isActive()) tx2.rollback();
            assertEquals("first-update", jdbcTemplate.queryForObject(
                    "SELECT content FROM messages WHERE id=?", String.class, message));
        } finally {
            if (tx1.isActive()) tx1.rollback();
            if (tx2.isActive()) tx2.rollback();
            first.close();
            second.close();
        }
    }

    @Test
    @Transactional
    void conditionalRecallRejectsWrongOwnerConversationVersionAndStatus() {
        fixture(LocalDateTime.of(2026, 9, 10, 10, 0));
        LocalDateTime recalledAt = LocalDateTime.of(2026, 9, 10, 10, 1);
        assertEquals(0, messageRepository.recallIfCurrent(message, conversation, 999L, 0L,
                MessageViewMapper.RECALLED_PLACEHOLDER, recalledAt));
        assertEquals(0, messageRepository.recallIfCurrent(message, 999L, sender, 0L,
                MessageViewMapper.RECALLED_PLACEHOLDER, recalledAt));
        assertEquals(0, messageRepository.recallIfCurrent(message, conversation, sender, 1L,
                MessageViewMapper.RECALLED_PLACEHOLDER, recalledAt));
        assertEquals(1, messageRepository.recallIfCurrent(message, conversation, sender, 0L,
                MessageViewMapper.RECALLED_PLACEHOLDER, recalledAt));
        assertEquals(0, messageRepository.recallIfCurrent(message, conversation, sender, 0L,
                MessageViewMapper.RECALLED_PLACEHOLDER, recalledAt));
    }

    private boolean hasCause(Throwable error, Class<? extends Throwable> type) {
        Throwable current = error;
        while (current != null) {
            if (type.isInstance(current)) return true;
            current = current.getCause();
        }
        return false;
    }

    @Test
    void existingMessageReadRowsRemainAfterRecall() {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        readRepository.saveAndFlush(MessageRead.builder().messageId(message).readerUserId(receiver).build());

        messagingService.recallMessage(sender, conversation, message, null, created.plusMinutes(1));

        assertEquals(1, readRepository.findByMessageIdInAndReaderUserId(java.util.List.of(message), receiver).size());
        messagingService.markRead(conversation, receiver);
        assertEquals(1, readRepository.findByMessageIdInAndReaderUserId(java.util.List.of(message), receiver).size());
        assertEquals(1, messagingService.listMessages(conversation, receiver, 0, 20)
                .getItems().stream().filter(item -> Boolean.TRUE.equals(item.getIsRead())).count());
    }

    @Test
    void expiredRecallDoesNotMutateDatabase() {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        assertEquals(created, messageRepository.findById(message).orElseThrow().getCreatedAt());
        BusinessException ex = assertThrows(BusinessException.class,
                () -> messagingService.recallMessage(sender, conversation, message, null, created.plusMinutes(2).plusNanos(1)));
        assertEquals(ErrorCode.MESSAGE_RECALL_WINDOW_EXPIRED.getCode(), ex.getErrorCodeInt());
        Message persisted = messageRepository.findById(message).orElseThrow();
        assertEquals("SENT", persisted.getStatus());
        assertEquals("secret-body", persisted.getContent());
        assertEquals(0L, persisted.getVersion());
        assertEquals(0, auditLogRepository.findAll().stream()
                .filter(a -> "MESSAGE_RECALLED".equals(a.getAction()) && message.equals(a.getEntityId())).count());
    }

    @Test
    void recalledMessagesAreNotUnreadOrMarkedRead() {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        messagingService.recallMessage(sender, conversation, message, null, created.plusMinutes(1));
        var messages = messagingService.listMessages(conversation, receiver, 0, 20);
        assertEquals(1, messages.getTotal());
        assertEquals(MessageViewMapper.RECALLED_PLACEHOLDER, messages.getItems().get(0).getContent());
        assertEquals("RECALLED", messages.getItems().get(0).getStatus());
        messagingService.markRead(conversation, receiver);
        assertEquals(0, readRepository.findByMessageIdInAndReaderUserId(java.util.List.of(message), receiver).size());
    }

    @Test
    void messageRecallDoesNotModifyCandidateDimensionScores() {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        candidateScoreStudent = receiver;
        jdbcTemplate.update("INSERT INTO candidate_dimension_scores "
                        + "(student_user_id, dimension, period, score, status, weight, rules_version, calculated_at) "
                        + "VALUES (?, 'ACTIVITY', '2026-09', 73.25, 'OK', 12.50, 'candidate-scoring-v0.2', ?)",
                candidateScoreStudent, created);
        java.util.Map<String, Object> before = jdbcTemplate.queryForMap(
                "SELECT id, student_user_id, dimension, score, status, weight, rules_version, calculated_at, period, version "
                        + "FROM candidate_dimension_scores WHERE student_user_id=? AND dimension='ACTIVITY'",
                candidateScoreStudent);

        messagingService.recallMessage(sender, conversation, message, null, created.plusMinutes(1));

        java.util.Map<String, Object> after = jdbcTemplate.queryForMap(
                "SELECT id, student_user_id, dimension, score, status, weight, rules_version, calculated_at, period, version "
                        + "FROM candidate_dimension_scores WHERE student_user_id=? AND dimension='ACTIVITY'",
                candidateScoreStudent);
        assertEquals(before, after, "message recall must not modify candidate_dimension_scores");
    }

    @Test
    void messageRecallDoesNotModifyNotificationsOrRiskGovernanceData() throws Exception {
        LocalDateTime created = LocalDateTime.of(2026, 9, 10, 10, 0);
        fixture(created);
        jdbcTemplate.update("INSERT INTO notifications(user_id, type, title, content, is_read, created_at) "
                        + "VALUES (?, 'SYSTEM', 'N07 baseline', 'unchanged', 0, ?)",
                receiver, created);
        Long ruleId = jdbcTemplate.queryForObject(
                "SELECT id FROM scoring_rule_configs ORDER BY id LIMIT 1", Long.class);
        jdbcTemplate.update("INSERT INTO scoring_risk_events(rule_config_id, subject_user_id, source_audit_log_id, "
                        + "source_action, severity, window_started_at, window_ended_at, occurrence_count, status, "
                        + "detected_at, version, created_at, updated_at) "
                        + "VALUES (?, ?, 987654321, 'REPORT_RATE_LIMITED', 'LOW', ?, ?, 1, 'OPEN', ?, 0, ?, ?)",
                ruleId, sender, created.minusMinutes(1), created, created, created, created);
        Long riskEventId = jdbcTemplate.queryForObject(
                "SELECT id FROM scoring_risk_events WHERE subject_user_id=?", Long.class, sender);
        jdbcTemplate.update("INSERT INTO scoring_risk_actions(risk_event_id, operator_user_id, action, reason_code, created_at) "
                        + "VALUES (?, ?, 'ACKNOWLEDGE', 'MONITORING', ?)",
                riskEventId, sender, created);

        java.util.List<java.util.Map<String, Object>> notificationsBefore = stableRows("notifications");
        java.util.List<java.util.Map<String, Object>> riskEventsBefore = stableRows("scoring_risk_events");
        java.util.List<java.util.Map<String, Object>> riskActionsBefore = stableRows("scoring_risk_actions");
        java.util.List<java.util.Map<String, Object>> riskRulesBefore = stableRows("scoring_rule_configs");
        java.util.List<java.util.Map<String, Object>> checkpointsBefore = stableRows("scoring_risk_scan_checkpoints");
        long auditsBefore = auditLogRepository.count();

        messagingService.recallMessage(sender, conversation, message,
                AuditContext.builder().requestId("n07-side-effect-check").build(), created.plusMinutes(1));

        assertEquals(notificationsBefore, stableRows("notifications"));
        assertEquals(riskEventsBefore, stableRows("scoring_risk_events"));
        assertEquals(riskActionsBefore, stableRows("scoring_risk_actions"));
        assertEquals(riskRulesBefore, stableRows("scoring_rule_configs"));
        assertEquals(checkpointsBefore, stableRows("scoring_risk_scan_checkpoints"));
        assertEquals(auditsBefore + 1, auditLogRepository.count());

        AuditLog recallAudit = auditLogRepository.findAll().stream()
                .filter(a -> "MESSAGE_RECALLED".equals(a.getAction()) && message.equals(a.getEntityId()))
                .findFirst().orElseThrow();
        JsonNode details = objectMapper.readTree(recallAudit.getDetails());
        java.util.Set<String> fields = new java.util.HashSet<>();
        details.fieldNames().forEachRemaining(fields::add);
        assertEquals(java.util.Set.of("messageId", "conversationId", "conversationType", "status", "requestId"), fields);
        assertNull(recallAudit.getIpAddress());
        assertNull(recallAudit.getUserAgent());
    }

    private java.util.List<java.util.Map<String, Object>> stableRows(String table) {
        java.util.Set<String> allowed = java.util.Set.of(
                "notifications", "scoring_risk_events", "scoring_risk_actions",
                "scoring_rule_configs", "scoring_risk_scan_checkpoints");
        if (!allowed.contains(table)) throw new IllegalArgumentException("unsupported snapshot table");
        return jdbcTemplate.queryForList("SELECT * FROM " + table + " ORDER BY id");
    }
}