/**
 * Кто видит тест: автор цепочки и пользователи с назначением (target user = clinic user id).
 */
import { isTestAuthor } from '../config/devAuthor.js';
import { query } from '../db/db.js';

/**
 * @param {string} userId
 * @param {string} testId
 * @returns {Promise<{ ok: boolean, isAuthor: boolean, notFound: boolean }>}
 */
export async function userHasTestAccess(userId, testId) {
  const { rows } = await query(
    `SELECT t.created_by FROM tests t WHERE t.id = $1`,
    [testId]
  );
  if (!rows.length) {
    return { ok: false, isAuthor: false, notFound: true };
  }
  if (isTestAuthor(rows[0].created_by, userId)) {
    return { ok: true, isAuthor: true, notFound: false };
  }
  const { rows: ar } = await query(
    `SELECT 1
     FROM test_assignments ta
     INNER JOIN test_versions tv_a ON tv_a.id = ta.test_version_id
     INNER JOIN test_assignment_targets tat ON tat.assignment_id = ta.id
     WHERE tv_a.test_id = $1
       AND tat.target_type = 'user'
       AND tat.target_id = $2
     LIMIT 1`,
    [testId, userId]
  );
  return { ok: ar.length > 0, isAuthor: false, notFound: false };
}

/**
 * Список тестов в каталоге: только `is_active` цепочка + (автор OR назначен).
 */
export async function queryTestsVisibleToUser(userId) {
  return query(
    `SELECT DISTINCT t.id, t.title, t.description, t.is_active AS chain_active,
            t.created_at, t.updated_at, tv.id AS active_version_id, tv.version,
            t.created_by, u.full_name AS author_full_name
     FROM tests t
     INNER JOIN test_versions tv ON tv.test_id = t.id AND tv.is_active = true
     INNER JOIN users u ON u.id = t.created_by
     WHERE t.is_active = true
       AND (
         t.created_by = $1
         OR EXISTS (
           SELECT 1
           FROM test_assignments ta
           INNER JOIN test_versions tv2 ON tv2.id = ta.test_version_id
           INNER JOIN test_assignment_targets tat ON tat.assignment_id = ta.id
           WHERE tv2.test_id = t.id
             AND tat.target_type = 'user'
             AND tat.target_id = $1
         )
       )
     ORDER BY t.updated_at DESC NULLS LAST, t.created_at DESC`,
    [userId]
  );
}