import postgres from "postgres";

let _sql: ReturnType<typeof postgres> | null = null;

/** Lazily-created shared postgres.js connection pool. */
export function getSql() {
  if (!_sql) {
    const url = process.env.DATABASE_URL;
    if (!url) throw new Error("DATABASE_URL not set");
    _sql = postgres(url, { max: 5, idle_timeout: 30 });
  }
  return _sql;
}