// 2026-03-19
// stress_js_async.js — делает 3 параллельных запроса к PG через Promise.all.
// Проверяет nodejs20 runtime под умеренной нагрузкой и async/await.
//
// Entrypoint: stress_js_async.run

'use strict';

const { Client } = require('pg');

exports.run = async (event) => {
    const client = new Client({
        host: process.env.PGHOST,
        port: parseInt(process.env.PGPORT || '5432'),
        database: process.env.PGDATABASE,
        user: process.env.PGUSER,
        password: process.env.PGPASSWORD,
        ssl: process.env.PGSSLMODE === 'require' ? { rejectUnauthorized: false } : false,
    });
    await client.connect();
    try {
        const [ver, cnt, max] = await Promise.all([
            client.query('SELECT version() AS v'),
            client.query('SELECT COUNT(*) AS cnt FROM terraform_demo_table'),
            client.query('SELECT MAX(id) AS max_id FROM terraform_demo_table'),
        ]);
        return {
            runtime: 'nodejs20',
            version: 'v1',
            pg_version: ver.rows[0].v.split(' ').slice(0, 2).join(' '),
            total_rows: parseInt(cnt.rows[0].cnt, 10),
            max_id: max.rows[0].max_id,
        };
    } finally {
        await client.end();
    }
};