const mysql = require('mysql2/promise');
require('dotenv').config();

const NODE_ENV = process.env.NODE_ENV || 'development';

function getDbConfig() {
  if (NODE_ENV === 'development') {
    return {
      host: process.env.DEV_DB_HOST || 'localhost',
      port: Number(process.env.DEV_DB_PORT) || 3306,
      user: process.env.DEV_DB_USER || 'root',
      password: process.env.DEV_DB_PASSWORD || '',
      database: process.env.DEV_DB_NAME || 'profitplanet_centralserver',
      ssl: undefined
    };
  }
  return {
    host: process.env.DB_HOST,
    port: Number(process.env.DB_PORT) || 3306,
    user: process.env.DB_USER,
    password: process.env.DB_PASSWORD,
    database: process.env.DB_NAME
  };
}

async function listAllVatRates() {
  const conn = await mysql.createConnection(getDbConfig());
  try {
    const [rows] = await conn.query(`
      SELECT id, country_code, country_name, is_eu, effective_year,
             standard_rate, reduced_rate_1, reduced_rate_2, super_reduced_rate,
             parking_rate, coffee_subscription_vat_rate, created_at, updated_at
      FROM vat_rates
      ORDER BY country_name ASC
    `);
    return rows;
  } finally {
    await conn.end();
  }
}

// export
module.exports = { listAllVatRates };