import { Client, QueryResult, QueryResultRow } from 'pg';

const client = new Client({
    // connectionString: process.env.DATABASE_URL,
    host: process.env.POSTGRES_HOST,
    user: process.env.POSTGRES_USER,
    password: process.env.POSTGRES_PASSWORD,
    database: process.env.POSTGRES_DB
  });

client.connect();

/** an adapter function which simulates @vercel/postgres `sql` function */ 
export function sql<T extends QueryResultRow>(strings: TemplateStringsArray, ...values: any[]): Promise<QueryResult<T>> {
    // string values need to be wrapped in single quotes
    const fixedValues = values.map((value) => {
      if (typeof value === 'string') {
        return `'${value}'`;
      }
      return value;
    });
  
    const query = String.raw(strings, ...fixedValues);
    return client.query<T>(query);
  }