import path from "node:path";

const dataDir = process.env.DATA_DIR || path.resolve(".vpn-proxy");
const parsePort = (value, fallback) => {
  const parsed = Number.parseInt(value, 10);
  return Number.isInteger(parsed) ? parsed : fallback;
};
const proxyPort = parsePort(
  process.env.PROXY_PORT,
  process.env.APP_MODE === "client" ? 8082 : 8080,
);

export const settings = {
  appMode: process.env.APP_MODE === "client" ? "client" : "gateway",
  port: parsePort(process.env.PORT, 3456),
  proxyPort,
  diagnosticsProxyPort: parsePort(process.env.DIAGNOSTICS_PROXY_PORT, 18080),
  tproxyPort: parsePort(process.env.TPROXY_PORT, 7895),
  tproxyMark: process.env.TPROXY_MARK || "1",
  tproxyChain: process.env.TPROXY_CHAIN || "VPN_PROXY_TPROXY",
  devicePolicyChain: process.env.DEVICE_POLICY_CHAIN || "VPN_PROXY_DEVICE_POLICY",
  trafficUploadChain: process.env.TRAFFIC_UPLOAD_CHAIN || "VPN_PROXY_TRAFFIC_UP",
  trafficDownloadChain: process.env.TRAFFIC_DOWNLOAD_CHAIN || "VPN_PROXY_TRAFFIC_DOWN",
  bypassCidrs: (process.env.BYPASS_CIDRS
    || "0.0.0.0/8 10.0.0.0/8 100.64.0.0/10 127.0.0.0/8 169.254.0.0/16 172.16.0.0/12 192.168.0.0/16 224.0.0.0/4 240.0.0.0/4")
    .trim().split(/\s+/).filter(Boolean),
  dataplaneSocket: process.env.DATAPLANE_SOCKET || "/run/vpn-proxy/dataplane.sock",
  bindIp: process.env.PROXY_BIND_IP || "0.0.0.0",
  dataDir,
  distDir: process.env.DIST_DIR || "/app/dist",
  configPath:
    process.env.SING_BOX_CONFIG || path.join(dataDir, "sing-box-config.json"),
  cachePath: process.env.SING_BOX_CACHE || "/var/lib/sing-box/cache.db",
  statePath: path.join(dataDir, "state.json"),
  deviceStatePath: path.join(dataDir, "devices.json"),
  subscriptionCachePath: path.join(dataDir, "subscription-cache.json"),
  sharedProxyHost: process.env.SHARED_PROXY_HOST || "",
  hostNetworkStatePath:
    process.env.HARBOR_HOST_NETWORK_STATE || "/run/harbor-host/network.json",
  gatewayPresencePort: parsePort(process.env.HARBOR_GATEWAY_CONTROL_PORT, 3456),
  subscriptionTimeoutMs: parsePort(process.env.SUBSCRIPTION_TIMEOUT_MS, 15_000),
  hwidPath: path.join(dataDir, "hwid"),
  logLevel: process.env.LOG_LEVEL || "info",
  appName: "VPN Proxy Gateway",
};