#!/usr/bin/env node
// Тестовый стенд PostgreSQL, повторяющий роли pilot, но без суперпользователя-мигратора:
//   * bootstrap-админ (E2E_PG_ADMIN_URL) используется ТОЛЬКО здесь, как DBA/entrypoint образа;
//   * krona_migrator — NOSUPERUSER NOCREATEDB NOCREATEROLE, владелец БД и схемы public;
//   * krona_staff_app — NOSUPERUSER NOBYPASSRLS NOINHERIT, права выдают миграции 0003+.
// Пароли генерируются crypto.randomBytes и пишутся только в env-файл с правами 0600.
// Печатаются имена ролей/БД, но не пароли.
import { randomBytes } from 'node:crypto';
import { writeFileSync } from 'node:fs';
import pg from 'pg';

const args = new Map();
for (let i = 2; i < process.argv.length; i += 2) args.set(process.argv[i], process.argv[i + 1]);
const adminUrl = process.env.E2E_PG_ADMIN_URL;
const envFile = args.get('--out');
const database = args.get('--db') ?? 'krona_staff_e2e';
if (!adminUrl || !envFile) {
  console.error(
    'Usage: E2E_PG_ADMIN_URL=... node scripts/test/provision-pg.mjs --out <env-path> [--db name]',
  );
  process.exit(2);
}
if (!/^[a-z_][a-z0-9_]{0,62}$/.test(database)) throw new Error('Invalid database name');

export async function provision() {
  const migratorPassword = randomBytes(24).toString('hex');
  const appPassword = randomBytes(24).toString('hex');
  const admin = new pg.Client({
    connectionString: adminUrl,
    application_name: 'krona-e2e-provision',
  });
  await admin.connect();
  try {
    await admin.query(`
      DO $$ BEGIN
        IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'krona_migrator') THEN
          CREATE ROLE krona_migrator LOGIN NOSUPERUSER NOCREATEDB NOCREATEROLE NOBYPASSRLS;
        END IF;
        IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'krona_staff_app') THEN
          CREATE ROLE krona_staff_app LOGIN NOSUPERUSER NOCREATEDB NOCREATEROLE NOINHERIT NOBYPASSRLS;
        END IF;
      END $$`);
    const alterMigrator = await admin.query(
      "SELECT format('ALTER ROLE krona_migrator WITH LOGIN PASSWORD %L NOSUPERUSER NOCREATEDB NOCREATEROLE NOBYPASSRLS', $1::text) AS sql",
      [migratorPassword],
    );
    await admin.query(alterMigrator.rows[0].sql);
    const alterApp = await admin.query(
      "SELECT format('ALTER ROLE krona_staff_app WITH LOGIN PASSWORD %L NOSUPERUSER NOCREATEDB NOCREATEROLE NOINHERIT NOBYPASSRLS', $1::text) AS sql",
      [appPassword],
    );
    await admin.query(alterApp.rows[0].sql);
    await admin.query(
      `SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname = $1 AND pid <> pg_backend_pid()`,
      [database],
    );
    await admin.query(`DROP DATABASE IF EXISTS ${database}`);
    await admin.query(
      `CREATE DATABASE ${database} OWNER krona_migrator ENCODING 'UTF8' TEMPLATE template0`,
    );
  } finally {
    await admin.end();
  }
  const dbAdminUrl = new URL(adminUrl);
  dbAdminUrl.pathname = `/${database}`;
  const dbAdmin = new pg.Client({ connectionString: dbAdminUrl.toString() });
  await dbAdmin.connect();
  try {
    await dbAdmin.query('ALTER SCHEMA public OWNER TO krona_migrator');
    await dbAdmin.query('REVOKE CREATE ON SCHEMA public FROM PUBLIC');
    await dbAdmin.query(`REVOKE ALL ON DATABASE ${database} FROM PUBLIC`);
    await dbAdmin.query(`GRANT CONNECT ON DATABASE ${database} TO krona_staff_app`);
  } finally {
    await dbAdmin.end();
  }
  const base = new URL(adminUrl);
  const url = (user, password) => {
    const u = new URL(base.toString());
    u.username = user;
    u.password = password;
    u.pathname = `/${database}`;
    return u.toString();
  };
  const migratorUrl = url('krona_migrator', migratorPassword);
  const appUrl = url('krona_staff_app', appPassword);
  const lines = [
    `DATABASE_MIGRATION_URL=${migratorUrl}`,
    `DATABASE_TEST_MIGRATION_URL=${migratorUrl}`,
    `DATABASE_TEST_URL=${appUrl}`,
    `DATABASE_URL=${appUrl}`,
    `POSTGRES_APP_PASSWORD=${appPassword}`,
    '',
  ];
  writeFileSync(envFile, lines.join('\n'), { mode: 0o600 });
  // Проверяем атрибуты ролей и печатаем их (без паролей) как доказательство.
  const check = new pg.Client({ connectionString: migratorUrl });
  await check.connect();
  try {
    const roles = await check.query(
      `SELECT rolname, rolsuper, rolcreaterole, rolcreatedb, rolbypassrls
       FROM pg_roles WHERE rolname IN ('krona_migrator','krona_staff_app') ORDER BY rolname`,
    );
    const version = await check.query('SHOW server_version');
    console.log(
      `provisioned database=${database} server_version=${version.rows[0].server_version}`,
    );
    for (const r of roles.rows) {
      console.log(
        `role=${r.rolname} super=${r.rolsuper} createrole=${r.rolcreaterole} createdb=${r.rolcreatedb} bypassrls=${r.rolbypassrls}`,
      );
    }
  } finally {
    await check.end();
  }
}

await provision();