import pkg from 'pg'
import dotenv from 'dotenv'

dotenv.config()

const { Pool } = pkg

// Support both connection string (Supabase) and individual parameters
let poolConfig

if (process.env.DATABASE_URL) {
  // Use connection string (Supabase format)
  poolConfig = {
    connectionString: process.env.DATABASE_URL,
    ssl: {
      rejectUnauthorized: false // Supabase requires SSL
    },
    // Connection pool settings for Supabase
    max: 20, // Maximum number of clients in the pool
    idleTimeoutMillis: 30000,
    connectionTimeoutMillis: 2000,
  }
} else {
  // Use individual parameters (local development)
  poolConfig = {
    host: process.env.DB_HOST || 'localhost',
    port: process.env.DB_PORT || 5432,
    database: process.env.DB_NAME || 'blog_editor',
    user: process.env.DB_USER || 'postgres',
    password: process.env.DB_PASSWORD,
    ssl: process.env.NODE_ENV === 'production' ? { rejectUnauthorized: false } : false,
  }
}

export const pool = new Pool(poolConfig)

pool.on('error', (err) => {
  console.error('Unexpected error on idle client', err)
  process.exit(-1)
})