/***********************************************************************************************************************************************************************
 * File Name: db.config.js
 * Type of Program: Configuration
 * Description: Sequelize PostgreSQL connection instance.
 *              Reads credentials from environment variables and exposes a single
 *              authenticated Sequelize instance used across all models.
 * Author: rgrgogu
 * Date Created: Oct. 6, 2025
 ***********************************************************************************************************************************************************************
 * HOW TO USE:
 *   const sequelize = require('./config/db.config');
 *   // Then use sequelize.define() or import your models directly.
 ***********************************************************************************************************************************************************************/
require('dotenv').config();
const { Sequelize } = require('sequelize');

const sequelize = new Sequelize(
  process.env.DB_NAME,
  process.env.DB_USER,
  process.env.DB_PASSWORD,
  {
    host: process.env.DB_HOST,
    port: process.env.DB_PORT || 5432,
    dialect: 'postgres',
    dialectOptions: {
      ssl: {
        require: true,
        rejectUnauthorized: false, // or provide CA cert if strict
      },
    },
    // logging: process.env.NODE_ENV === 'development' ? console.log : false,
    logging: false,
    pool: {
      max: 10,
      min: 0,
      acquire: 30000,
      idle: 10000,
    },
  }
);

module.exports = sequelize;