import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const defaultLocalLegacyRoot = path.resolve(__dirname, '../../../../www');
const isProduction = process.env.NODE_ENV === 'production';

function envOrDefault(name, defaultValue) {
  return process.env[name] || defaultValue;
}

export const config = {
  port: Number(process.env.PORT || 3001),
  frontendUrl: envOrDefault('FACEAI_FRONTEND_URL', isProduction ? 'https://ai.regalamiunsorriso.it' : 'http://localhost:5173'),
  publicBaseUrl: envOrDefault('FACEAI_PUBLIC_BASE_URL', isProduction ? 'https://ai.regalamiunsorriso.it' : 'http://localhost:3001'),
  legacyReturnUrl: envOrDefault('FACEAI_LEGACY_RETURN_URL', isProduction ? 'https://www.regalamiunsorriso.it/faceai_return.php' : 'http://localhost:3001/dev/legacy/return'),
  legacyHomeUrl: envOrDefault('FACEAI_LEGACY_HOME_URL', isProduction ? 'https://www.regalamiunsorriso.it/' : 'http://localhost:8080/index.jsp'),
  pklRoot: process.env.FACEAI_PKL_ROOT || '/data/pkl',
  enableLocalLegacyStatic: process.env.FACEAI_ENABLE_LOCAL_LEGACY_STATIC
    ? process.env.FACEAI_ENABLE_LOCAL_LEGACY_STATIC === '1'
    : process.env.NODE_ENV !== 'production',
  localLegacyStaticRoot: process.env.FACEAI_LOCAL_LEGACY_STATIC_ROOT || defaultLocalLegacyRoot,
  sharedSecret: process.env.FACEAI_SHARED_SECRET || 'change-me',
  sessionCookieName: process.env.FACEAI_SESSION_COOKIE || 'rus_faceai_session',
  redisUrl: process.env.FACEAI_REDIS_URL || 'redis://redis:6379',
  queueName: process.env.FACEAI_QUEUE_NAME || 'faceai-searches',
  runtimeRoot: process.env.FACEAI_RUNTIME_ROOT || '/data/runtime',
  uploadRoot: process.env.FACEAI_UPLOAD_ROOT || path.join(process.env.FACEAI_RUNTIME_ROOT || '/data/runtime', 'uploads'),
  searchTtlSeconds: Number(process.env.FACEAI_SEARCH_TTL_SECONDS || 24 * 60 * 60),
  resultTtlSeconds: Number(process.env.FACEAI_RESULT_TTL_SECONDS || 24 * 60 * 60),
  processorHeartbeatGraceMs: Number(process.env.FACEAI_PROCESSOR_HEARTBEAT_GRACE_MS || 20 * 1000),
  rateLimitWindowSeconds: Number(process.env.FACEAI_RATE_LIMIT_WINDOW_SECONDS || 10 * 60),
  rateLimitMaxRequests: Number(process.env.FACEAI_RATE_LIMIT_MAX_REQUESTS || 5)
};