@Tags(<String>['integration', 'postgres'])
library;

import 'dart:convert';

import 'package:cyberhybridhub_server/pipeline/question_pipeline.dart';
import 'package:cyberhybridhub_server/question_dispatcher.dart';
import 'package:postgres/postgres.dart';
import 'package:test/test.dart';

import '../helpers/test_db.dart';

void main() {
  TestDb? testDb;

  setUpAll(() async {
    testDb = await TestDb.open();
  });

  tearDown(() async {
    if (testDb != null) {
      await testDb!.truncateTradingTables();
    }
  });

  tearDownAll(() async {
    await testDb?.close();
  });

  Future<QuestionPipeline> _pipeline() async {
    return QuestionPipeline(
      questionsDb: testDb!.questionsDb,
      questionService: testDb!.questionService(),
      questionSourcePreferencesDb: testDb!.questionSourcePreferencesDb,
      testMode: true,
    );
  }

  test('maintainSpellingForUser creates spelling pipeline question', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    const String uid = 'spelling-maintain-uid';
    await testDb!.seedUser(uid);

    final QuestionPipeline pipeline = await _pipeline();
    await pipeline.maintainSpellingForUser(uid);

    final Result rows = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT pipeline_key, pipeline_step, source_tag
        FROM questions
        WHERE assigned_user_id = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(rows, hasLength(1));
    expect(rows.first[0], PipelineKeys.spelling);
    expect(rows.first[1], PipelineSteps.spellingWordQuiz);
    expect(rows.first[2], 'spelling:word_quiz');

    final Result meta = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT metadata->>'spelling_item_id'
        FROM questions
        WHERE assigned_user_id = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(meta.first[0], isNull);
  });

  test('prepareSpellingQuestion selects word and creates links at tile load',
      () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    const String uid = 'spelling-prepare-uid';
    await testDb!.seedUser(uid);

    final QuestionPipeline pipeline = await _pipeline();
    await pipeline.maintainSpellingForUser(uid);

    final Result reserved = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT id, metadata
        FROM questions
        WHERE assigned_user_id = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final String questionId = reserved.first[0]!.toString();

    final Map<String, dynamic>? prepared = await pipeline.prepareSpellingQuestion(
      firebaseUid: uid,
      questionId: questionId,
    );
    expect(prepared, isNotNull);
    expect(prepared!['spokenWord'], isNotEmpty);
    expect(prepared['audioTitle'], questionId);
    expect(prepared['canonicalWord'], isNotEmpty);

    final Result link = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT spelling_item_id
        FROM spelling_question_links
        WHERE question_id = @qid::uuid
        ''',
      ),
      parameters: <String, dynamic>{'qid': questionId},
    );
    expect(link, hasLength(1));

    final Result progress = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT familiarity_score, attempt_count
        FROM user_spelling_progress
        WHERE firebase_uid = @uid
          AND spelling_item_id = @item_id::uuid
        ''',
      ),
      parameters: <String, dynamic>{
        'uid': uid,
        'item_id': link.first[0]!.toString(),
      },
    );
    expect(progress, hasLength(1));
    expect(progress.first[0], 0);
    expect(progress.first[1], 0);
  });

  test('maintainSpellingForUser skips when spelling source disabled', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    const String uid = 'spelling-disabled-uid';
    await testDb!.seedUser(uid);
    await testDb!.questionSourcePreferencesDb.save(
      uid,
      <Map<String, dynamic>>[
        <String, dynamic>{'id': 'market_history', 'enabled': true, 'ratio': 50},
        <String, dynamic>{'id': 'spelling', 'enabled': false, 'ratio': 50},
      ],
    );

    final QuestionPipeline pipeline = await _pipeline();
    await pipeline.maintainSpellingForUser(uid);

    final Result rows = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM questions
        WHERE assigned_user_id = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(rows.first[0], 0);
  });

  test('onAnswerSubmitted branches to follow-up then another word', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    const String uid = 'spelling-answer-uid';
    await testDb!.seedUser(uid);

    final QuestionPipeline pipeline = await _pipeline();
    await pipeline.maintainSpellingForUser(uid);

    final Result reserved = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT id
        FROM questions
        WHERE assigned_user_id = @uid
        ORDER BY created_at
        LIMIT 1
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final String reservedId = reserved.first[0]!.toString();
    await pipeline.prepareSpellingQuestion(
      firebaseUid: uid,
      questionId: reservedId,
    );

    final Result first = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT id, metadata
        FROM questions
        WHERE assigned_user_id = @uid
        ORDER BY created_at
        LIMIT 1
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final String questionId = first.first[0]!.toString();
    final Object? metadataRaw = first.first[1];
    final Map<String, dynamic> metadata = metadataRaw is Map<String, dynamic>
        ? metadataRaw
        : Map<String, dynamic>.from(
            jsonDecode(metadataRaw.toString()) as Map<String, dynamic>,
          );
    final String canonicalWord = metadata['canonical_word']! as String;

    final Map<String, dynamic>? answered = await testDb!.questionsDb.submitAnswer(
      questionId: questionId,
      assignedUserId: uid,
      userResponseText: canonicalWord,
    );
    expect(answered, isNotNull);

    await pipeline.onAnswerSubmitted(
      firebaseUid: uid,
      answeredQuestion: answered!,
      userResponse: answered['userResponse'] as num? ?? 0,
    );

    final Result rows = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT pipeline_step, source_tag
        FROM questions
        WHERE assigned_user_id = @uid
        ORDER BY created_at
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(rows.length, greaterThanOrEqualTo(2));
    expect(rows.last[0], PipelineSteps.spellingFollowUp);
    expect(rows.last[1], 'spelling:follow_up');
  });

  test('resetSpellingProgressForUser clears links and progress then re-seeds',
      () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    const String uid = 'spelling-reset-uid';
    await testDb!.seedUser(uid);

    final QuestionDispatcher dispatcher = testDb!.questionDispatcher();
    final QuestionPipeline pipeline = testDb!.questionPipeline(testMode: true);
    pipeline.attachQuestionDispatcher(dispatcher);
    await pipeline.maintainSpellingForUser(uid);

    final Result reserved = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT id
        FROM questions
        WHERE assigned_user_id = @uid
        LIMIT 1
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final String questionId = reserved.first[0]!.toString();
    await pipeline.prepareSpellingQuestion(
      firebaseUid: uid,
      questionId: questionId,
    );

    final Result progressBefore = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM user_spelling_progress
        WHERE firebase_uid = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final Result linksBefore = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM spelling_question_links
        WHERE firebase_uid = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(progressBefore.first[0], greaterThan(0));
    expect(linksBefore.first[0], greaterThan(0));

    final Map<String, dynamic> result =
        await pipeline.resetSpellingProgressForUser(uid);
    expect(result['unansweredCount'], greaterThanOrEqualTo(1));

    final Result progressAfter = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM user_spelling_progress
        WHERE firebase_uid = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    final Result linksAfter = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM spelling_question_links
        WHERE firebase_uid = @uid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(progressAfter.first[0], 0);
    expect(linksAfter.first[0], 0);

    final Result spellingQuestions = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT COUNT(*)::int
        FROM questions
        WHERE assigned_user_id = @uid
          AND pipeline_key = 'spelling'
          AND user_response IS NULL
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    expect(spellingQuestions.first[0], 1);
  });
}