export const PROTOCOL_VERSION = 1;
export const MIN_SUPPORTED_PROTOCOL = 1;
export const CLIENT_KIND = "extension";
export const MODE_FETCH = "fetch";

export const ALLOWED_PORTS = Object.freeze([80, 443]);
export const HTTPS_PORT = 443;

export const CLOSE_NORMAL = 1000;
export const CLOSE_PROTOCOL = 4400;
export const CLOSE_RETRY_OWNER = 4013;
export const CLOSE_CAPACITY = 4029;
export const CLOSE_KICKED = 4403;
export const CLOSE_POLICY = 1008;

export const MAX_REDIRECTS = 5;
export const MAX_RESPONSE_HEADERS = 64;
export const MAX_HEADER_VALUE_CHARS = 512;
export const MAX_BODY_CHUNKS = 65536;
export const MAX_BACKOFF_EXPONENT = 16;

export const LIMITS = Object.freeze({
  max_frame_bytes: 256 * 1024,
  max_body_bytes: 2 * 1024 * 1024,
  max_concurrent_per_node: 2,
  job_timeout_seconds: 25,
  default_donor_mb_per_day: 500,
  max_donor_mb_per_day: 20 * 1024,
  ping_seconds: 20,
  reconnect_min_seconds: 1,
  reconnect_max_seconds: 60,
  url_max_chars: 2048,
});

export const FRAME_CEILING_BYTES = Object.freeze({
  job_result: 3 * 1024 * 1024,
  default: 256 * 1024,
});

export const DESTINATIONS = Object.freeze([
  Object.freeze({
    suffix: "reddit.com",
    adapter: "reddit",
    methods: Object.freeze(["GET"]),
    ports: Object.freeze([80, 443]),
    modes: Object.freeze(["tunnel", "fetch"]),
    max_rps: 0.5,
  }),
  Object.freeze({
    suffix: "redd.it",
    adapter: "reddit",
    methods: Object.freeze(["GET"]),
    ports: Object.freeze([80, 443]),
    modes: Object.freeze(["tunnel", "fetch"]),
    max_rps: 0.5,
  }),
]);

export const REFUSALS = Object.freeze({
  HOST_NOT_ALLOWED: "host_not_allowed",
  PORT_NOT_ALLOWED: "port_not_allowed",
  ADDRESS_NOT_PUBLIC: "address_not_public",
  REDIRECT_NOT_ALLOWED: "redirect_not_allowed",
  METHOD_NOT_ALLOWED: "method_not_allowed",
  BANDWIDTH_EXHAUSTED: "bandwidth_exhausted",
  CONCURRENCY_EXCEEDED: "concurrency_exceeded",
  OUTSIDE_HOURS: "outside_hours",
  ON_BATTERY: "on_battery",
  BODY_TOO_LARGE: "body_too_large",
  TIMEOUT: "timeout",
});

export const SUSPENSION = Object.freeze({
  reason: "suspended",
  min_seconds: 60,
  max_seconds: 24 * 60 * 60,
  default_seconds: 300,
  jitter_seconds: 30,
});

export const FETCH_FAILED = "fetch_failed";

export const SERVER_FRAMES = Object.freeze({
  welcome: Object.freeze({
    device_uid: "string",
    limits: "object",
    destinations: "array",
    settings: "object",
  }),
  ping: Object.freeze({}),
  job: Object.freeze({
    job_id: "string",
    method: "string",
    url: "string",
    timeout: "number",
  }),
  tunnel_open: Object.freeze({ conn_id: "string", host: "string", port: "number" }),
  tunnel_data: Object.freeze({ conn_id: "string", b64: "string" }),
  tunnel_close: Object.freeze({ conn_id: "string" }),
  settings_update: Object.freeze({ settings: "object" }),
  kick: Object.freeze({ reason: "string" }),
});

export const DROPPED_RESPONSE_HEADERS = Object.freeze([
  "set-cookie",
  "set-cookie2",
  "authorization",
  "proxy-authenticate",
]);

export const FORWARDED_REQUEST_HEADERS = Object.freeze(["accept", "accept-language"]);

export const HALTING_CLOSE_REASONS_EXEMPT = Object.freeze(["ticket", "heartbeat", "error", "capacity"]);