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

import 'dart:convert';
import 'dart:math';

import 'package:cyberhybridhub_server/pipeline/question_pipeline.dart';
import 'package:cyberhybridhub_server/spelling/spelling_item_selector.dart';
import 'package:cyberhybridhub_server/spelling/spelling_items_db.dart';
import 'package:cyberhybridhub_server/spelling/user_spelling_progress_db.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();
  });

  test('catalog seeds two items per curated word', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

    final Result words = await testDb!.connection.execute(
      'SELECT COUNT(*)::int FROM spelling_words',
    );
    final Result items = await testDb!.connection.execute(
      'SELECT COUNT(*)::int FROM spelling_items',
    );
    expect((words.first[0]! as num).toInt(), 10);
    expect((items.first[0]! as num).toInt(), 20);
  });

  test('wrong answer increases familiarity weight for next pick', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

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

    final SpellingItemsDb itemsDb = testDb!.spellingItemsDb;
    final UserSpellingProgressDb progressDb =
        UserSpellingProgressDb(testDb!.connection);
    final SpellingItemSelector selector = SpellingItemSelector(
      itemsDb: itemsDb,
      random: Random(1),
    );

    final picked = await selector.pickForUser(uid);
    expect(picked, isNotNull);

    await progressDb.recordQuizOutcome(
      firebaseUid: uid,
      spellingItemId: picked!.id,
      correct: false,
    );

    final int? score = await progressDb.familiarityScore(
      firebaseUid: uid,
      spellingItemId: picked.id,
    );
    expect(score, -1);

    final QuestionPipeline pipeline = testDb!.questionPipeline();
    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 DESC
        LIMIT 1
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid},
    );
    await pipeline.prepareSpellingQuestion(
      firebaseUid: uid,
      questionId: reserved.first[0]!.toString(),
    );

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

  test('quiz answer updates user_spelling_progress', () async {
    if (testDb == null) {
      markTestSkipped('Set DATABASE_URL or TEST_DATABASE_URL for integration tests');
      return;
    }

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

    final QuestionPipeline pipeline = testDb!.questionPipeline();
    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},
    );
    await pipeline.prepareSpellingQuestion(
      firebaseUid: uid,
      questionId: reserved.first[0]!.toString(),
    );

    final Result first = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT id, correct_answer, 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 Map<String, dynamic> metadata = _readMetadata(first.first[2]);
    final String itemId = metadata['spelling_item_id']! as String;
    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 progress = await testDb!.connection.execute(
      Sql.named(
        '''
        SELECT familiarity_score, attempt_count, correct_count, last_outcome
        FROM user_spelling_progress
        WHERE firebase_uid = @uid AND spelling_item_id = @item_id::uuid
        ''',
      ),
      parameters: <String, dynamic>{'uid': uid, 'item_id': itemId},
    );
    expect(progress, hasLength(1));
    expect(progress.first[0], 1);
    expect(progress.first[1], 1);
    expect(progress.first[2], 1);
    expect(progress.first[3], 'correct');
  });
}

Map<String, dynamic> _readMetadata(Object? raw) {
  if (raw is Map<String, dynamic>) {
    return raw;
  }
  if (raw is Map) {
    return Map<String, dynamic>.from(raw);
  }
  return Map<String, dynamic>.from(
    jsonDecode(raw.toString()) as Map<String, dynamic>,
  );
}