/**
 * Platform-specific paths and environment variable configuration
 */
const path = require('path');
const platformPaths = require('../../platform-paths');

const CADDYFILE_PATH = process.env.CADDYFILE_PATH || platformPaths.caddyfile;
const CADDY_ADMIN_URL = process.env.CADDY_ADMIN_URL || platformPaths.caddyAdminUrl;
const SERVICES_FILE = process.env.SERVICES_FILE || platformPaths.servicesFile;
const SERVICES_DIR = path.dirname(SERVICES_FILE);
const CONFIG_FILE = process.env.CONFIG_FILE || path.join(SERVICES_DIR, 'config.json');
const DNS_CREDENTIALS_FILE = process.env.DNS_CREDENTIALS_FILE || path.join(SERVICES_DIR, 'dns-credentials.json');
const TAILSCALE_CONFIG_FILE = process.env.TAILSCALE_CONFIG_FILE || path.join(SERVICES_DIR, 'tailscale-config.json');
const NOTIFICATIONS_FILE = process.env.NOTIFICATIONS_FILE || path.join(SERVICES_DIR, 'notifications.json');
const TOTP_CONFIG_FILE = process.env.TOTP_CONFIG_FILE || path.join(SERVICES_DIR, 'totp-config.json');
const ERROR_LOG_FILE = process.env.ERROR_LOG_FILE || path.join(platformPaths.dataDir, 'error.log');
const LICENSE_SECRET_FILE = process.env.LICENSE_SECRET_FILE || path.join(platformPaths.dataDir, '.license-secret');

const BROWSE_ROOTS = (process.env.MEDIA_BROWSE_ROOTS || '')
  .split(',')
  .filter(r => r.includes('='))
  .map(r => {
    const eqIndex = r.indexOf('=');
    const containerPath = r.slice(0, eqIndex).trim();
    const hostPath = r.slice(eqIndex + 1).trim();
    return { containerPath, hostPath };
  });

module.exports = {
  CADDYFILE_PATH,
  CADDY_ADMIN_URL,
  SERVICES_FILE,
  SERVICES_DIR,
  // Re-export the resolved data directory so other modules (notably
  // src/utilities/nesting-guard.js) can locate `/app/data` without having to
  // also require('../../platform-paths') — keeps a single source of truth for
  // the data dir on the src/config/paths surface. Without this, `dataDir`
  // resolves to `undefined`, and `path.join(undefined, 'data')` throws
  // `TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type
  // string. Received undefined` at startup (DC-077 fingerprint). Fall back to
  // platformPaths.dataDir if SERVICES_DIR is somehow not a string (defensive —
  // SERVICES_DIR is computed from a path.dirname() of a string so it always
  // is, but the cost of guarding is one branch).
  dataDir: typeof SERVICES_DIR === 'string' && SERVICES_DIR ? SERVICES_DIR : platformPaths.dataDir,
  CONFIG_FILE,
  DNS_CREDENTIALS_FILE,
  TAILSCALE_CONFIG_FILE,
  NOTIFICATIONS_FILE,
  TOTP_CONFIG_FILE,
  ERROR_LOG_FILE,
  LICENSE_SECRET_FILE,
  BROWSE_ROOTS,
};