const dotenv = require('dotenv');
const AWS = require('aws-sdk');

dotenv.config();

function integerFromEnv(name, fallback) {
  const value = process.env[name];
  if (value === undefined || value === '') return fallback;
  return Number(value);
}

module.exports = {
  WEBHOOK_URL: process.env.WEBHOOK_URL,
  WEBHOOK_BEARER_TOKEN: process.env.WEBHOOK_BEARER_TOKEN || undefined,
  PORT: integerFromEnv('PORT', 25),
  MAX_FILE_SIZE: integerFromEnv('MAX_FILE_SIZE', 5 * 1024 * 1024),
  MAX_MESSAGE_SIZE: integerFromEnv('MAX_MESSAGE_SIZE', 25 * 1024 * 1024),
  MAX_SMTP_CLIENTS: integerFromEnv('MAX_SMTP_CLIENTS', 50),
  SMTP_SOCKET_TIMEOUT: integerFromEnv('SMTP_SOCKET_TIMEOUT', 5 * 60 * 1000),
  SMTP_CLOSE_TIMEOUT: integerFromEnv('SMTP_CLOSE_TIMEOUT', 10 * 1000),
  SMTP_ALLOWED_IPS: (process.env.SMTP_ALLOWED_IPS || '')
    .split(',')
    .map(ip => ip.trim())
    .filter(Boolean),
  BUCKET_NAME: process.env.S3_BUCKET_NAME,
  SMTP_SECURE: process.env.SMTP_SECURE === 'true',
  TLS_KEY_PATH: process.env.TLS_KEY_PATH,
  TLS_CERT_PATH: process.env.TLS_CERT_PATH,
  WEBHOOK_CONCURRENCY: integerFromEnv('WEBHOOK_CONCURRENCY', 5),
  WEBHOOK_QUEUE_RETRIES: integerFromEnv('WEBHOOK_QUEUE_RETRIES', 10),
  WEBHOOK_QUEUE_RETRY_DELAY: integerFromEnv('WEBHOOK_QUEUE_RETRY_DELAY', 60 * 1000),
  WEBHOOK_QUEUE_TIMEOUT: integerFromEnv('WEBHOOK_QUEUE_TIMEOUT', 35 * 1000),
  SPOOL_DIR: process.env.SPOOL_DIR || '/var/lib/smtpwebhook/spool',
  LOG_DIR: process.env.LOG_DIR || '/var/lib/smtpwebhook/logs',

  s3: new AWS.S3({
    region: process.env.AWS_REGION,
    accessKeyId: process.env.AWS_ACCESS_KEY_ID,
    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
  })
};