/**
 * Card1 V.9: интеграция с реальной `clinic_tests` — старая попытка остаётся
 * на снимке версии и старых `question_id` после форка (новая версия).
 *
 * Запуск: `CLINIC_TESTS_INTEGRATION=1` и применённые миграции (`npm run migrate`),
 * `DATABASE_URL` (или DB_*) к той же базе. Без флага тесты помечаются skip.
 */
import { test } from 'node:test';
import assert from 'node:assert/strict';
import pg from 'pg';
import bcrypt from 'bcryptjs';
import { getPoolConfig } from '../db/poolConfig.js';
import { saveTestDraft, createTestWithVersion } from '../services/testDraftService.js';

const { Pool } = pg;

/** `CLINIC_TESTS_INTEGRATION=1` и успешный `SELECT 1` (без БД — skip, не fail). */
let runDb = false;
if (process.env.CLINIC_TESTS_INTEGRATION === '1') {
  const probe = new Pool({
    ...getPoolConfig(),
    connectionTimeoutMillis: 2000,
  });
  try {
    await probe.query('SELECT 1');
    runDb = true;
  } catch {
    runDb = false;
  } finally {
    await probe.end();
  }
}

const qPayload = (label) => ({
  title: 'V9 ' + label,
  questions: [
    {
      text: `Q ${label}`,
      question_order: 1,
      hasMultipleAnswers: false,
      options: [
        { text: 'yes', isCorrect: true, option_order: 1 },
        { text: 'no', isCorrect: false, option_order: 2 },
      ],
    },
  ],
});

/**
 * @param {import('pg').Pool} pool
 * @param {string} testId
 * @param {string} [exceptUserId]
 */
async function purgeTestChain(pool, testId, exceptUserId) {
  await pool.query(
    `DELETE FROM user_answers WHERE attempt_id IN (
       SELECT id FROM test_attempts WHERE test_version_id IN (
         SELECT id FROM test_versions WHERE test_id = $1
       )
     )`,
    [testId]
  );
  await pool.query(
    `DELETE FROM test_attempts WHERE test_version_id IN (
       SELECT id FROM test_versions WHERE test_id = $1
     )`,
    [testId]
  );
  await pool.query(
    `DELETE FROM answer_options WHERE question_id IN (
       SELECT id FROM questions WHERE test_version_id IN (
         SELECT id FROM test_versions WHERE test_id = $1
       )
     )`,
    [testId]
  );
  await pool.query(
    `DELETE FROM questions WHERE test_version_id IN (
       SELECT id FROM test_versions WHERE test_id = $1
     )`,
    [testId]
  );
  await pool.query(`DELETE FROM test_versions WHERE test_id = $1`, [testId]);
  await pool.query(`DELETE FROM tests WHERE id = $1`, [testId]);
  if (exceptUserId) {
    await pool.query(`DELETE FROM users WHERE id = $1`, [exceptUserId]);
  }
}

test(
  'V.9: без попыток два saveTestDraft — одна строка test_versions (редактирование на месте)',
  { skip: !runDb },
  async () => {
    const pool = new Pool(getPoolConfig());
    const suffix = `${Date.now()}-${Math.random().toString(16).slice(2)}`;
    let userId;
    let testId;
    try {
      const { rows: u } = await pool.query(
        `INSERT INTO users (login, password_hash, full_name, role, is_active)
         VALUES ($1, $2, 'V9 in-place', 'hr', true) RETURNING id`,
        [`v9p-${suffix}`, bcrypt.hashSync('x', 4)]
      );
      userId = u[0].id;
      const c = await createTestWithVersion(pool, userId, { title: 'V9P' });
      testId = c.testId;
      const { rows: v0 } = await pool.query(
        `SELECT id FROM test_versions WHERE test_id = $1 AND is_active = true`,
        [testId]
      );
      const vid0 = v0[0].id;
      await saveTestDraft(pool, userId, testId, qPayload('A'));
      const { rows: c1 } = await pool.query(
        `SELECT count(*)::int AS n FROM test_versions WHERE test_id = $1`,
        [testId]
      );
      assert.equal(c1[0].n, 1, 'должна остаться одна версия');
      const { rows: v1 } = await pool.query(
        `SELECT id FROM test_versions WHERE test_id = $1 AND is_active = true`,
        [testId]
      );
      assert.equal(
        v1[0].id,
        vid0,
        'id активной версии не меняется при нуле попыток'
      );
      await saveTestDraft(pool, userId, testId, qPayload('B'));
      const { rows: c2 } = await pool.query(
        `SELECT count(*)::int AS n FROM test_versions WHERE test_id = $1`,
        [testId]
      );
      assert.equal(c2[0].n, 1);
      const { rows: v2 } = await pool.query(
        `SELECT id FROM test_versions WHERE test_id = $1 AND is_active = true`,
        [testId]
      );
      assert.equal(v2[0].id, vid0);
    } finally {
      if (userId && testId) {
        await purgeTestChain(pool, testId, userId);
      }
      await pool.end();
    }
  }
);

test(
  'V.9: после попытки форк — попытка и user_answers остаются на старых version_id / question_id',
  { skip: !runDb },
  async () => {
    const pool = new Pool(getPoolConfig());
    const suffix = `${Date.now()}-${Math.random().toString(16).slice(2)}`;
    let userId;
    let testId;
    let v1Id;
    let q1Id;
    let opt1Id;
    let attemptId;
    try {
      const { rows: u } = await pool.query(
        `INSERT INTO users (login, password_hash, full_name, role, is_active)
         VALUES ($1, $2, 'V9 fork', 'hr', true) RETURNING id`,
        [`v9f-${suffix}`, bcrypt.hashSync('x', 4)]
      );
      userId = u[0].id;
      const c = await createTestWithVersion(pool, userId, { title: 'V9F' });
      testId = c.testId;
      await saveTestDraft(pool, userId, testId, qPayload('pre'));

      const { rows: tv0 } = await pool.query(
        `SELECT id FROM test_versions WHERE test_id = $1 AND is_active = true`,
        [testId]
      );
      v1Id = tv0[0].id;
      const { rows: qu } = await pool.query(
        `SELECT id FROM questions WHERE test_version_id = $1 LIMIT 1`,
        [v1Id]
      );
      q1Id = qu[0].id;
      const { rows: op } = await pool.query(
        `SELECT id FROM answer_options WHERE question_id = $1 AND is_correct = true LIMIT 1`,
        [q1Id]
      );
      opt1Id = op[0].id;

      const { rows: at } = await pool.query(
        `INSERT INTO test_attempts (test_version_id, user_id, attempt_number, status, correct_count, total_questions, passed)
         VALUES ($1, $2, 1, 'completed', 1, 1, true) RETURNING id`,
        [v1Id, userId]
      );
      attemptId = at[0].id;
      await pool.query(
        `INSERT INTO user_answers (attempt_id, question_id, selected_options) VALUES ($1, $2, $3::uuid[])`,
        [attemptId, q1Id, [opt1Id]]
      );

      const out = await saveTestDraft(pool, userId, testId, qPayload('post-fork'));
      assert.equal(out.forked, true, 'должна создаться новая версия после попытки');

      const { rows: att } = await pool.query(
        `SELECT test_version_id FROM test_attempts WHERE id = $1`,
        [attemptId]
      );
      assert.equal(
        att[0].test_version_id,
        v1Id,
        'попытка остаётся на версии, с которой проходили'
      );
      const { rows: ua } = await pool.query(
        `SELECT question_id, selected_options FROM user_answers WHERE attempt_id = $1`,
        [attemptId]
      );
      assert.equal(ua[0].question_id, q1Id);
      assert.equal(ua[0].selected_options[0], opt1Id);

      const { rows: qExists } = await pool.query(
        `SELECT 1 FROM questions WHERE id = $1 AND test_version_id = $2`,
        [q1Id, v1Id]
      );
      assert.equal(qExists.length, 1, 'старый вопрос остаётся в старой версии');

      const { rows: active } = await pool.query(
        `SELECT id FROM test_versions WHERE test_id = $1 AND is_active = true`,
        [testId]
      );
      assert.notEqual(active[0].id, v1Id, 'новая версия — активна');
    } finally {
      if (userId && testId) {
        await purgeTestChain(pool, testId, userId);
      }
      await pool.end();
    }
  }
);