namespace deno;

union Any {
  Start,
  StartRes,
  CodeFetch,
  CodeFetchRes,
  CodeCache,
  Exit,
  TimerStart,
  TimerReady,
  TimerClear,
  FetchReq,
  FetchRes,
  ReadFileSync,
  ReadFileSyncRes,
  WriteFileSync,
}

enum ErrorKind: byte {
  NoError = 0,

  // io errors

  NotFound,
  PermissionDenied,
  ConnectionRefused,
  ConnectionReset,
  ConnectionAborted,
  NotConnected,
  AddrInUse,
  AddrNotAvailable,
  BrokenPipe,
  AlreadyExists,
  WouldBlock,
  InvalidInput,
  InvalidData,
  TimedOut,
  Interrupted,
  WriteZero,
  Other,
  UnexpectedEof,

  // url errors

  EmptyHost,
  IdnaError,
  InvalidPort,
  InvalidIpv4Address,
  InvalidIpv6Address,
  InvalidDomainCharacter,
  RelativeUrlWithoutBase,
  RelativeUrlWithCannotBeABaseBase,
  SetHostOnCannotBeABaseUrl,
  Overflow,

  // hyper errors

  HttpUser,
  HttpClosed,
  HttpCanceled,
  HttpParse,
  HttpOther,
}

table Base {
  cmd_id: uint32;
  error_kind: ErrorKind = NoError;
  error: string;
  msg: Any;
}

table Start {
  unused: int8;
}

table StartRes {
  cwd: string;
  argv: [string];
  debug_flag: bool;
}

table CodeFetch {
  module_specifier: string;
  containing_file: string;
}

table CodeFetchRes {
  // If it's a non-http module, moduleName and filename will be the same.
  // For http modules, moduleName is its resolved http URL, and filename
  // is the location of the locally downloaded source code.
  module_name: string;
  filename: string;
  source_code: string;
  output_code: string; // Non-empty only if cached.
}

table CodeCache {
  filename: string;
  source_code: string;
  output_code: string;
}

table Exit {
  code: int;
}

table TimerStart {
  id: uint;
  interval: bool;
  delay: uint;
}

table TimerReady {
  id: uint;
  done: bool;
}

table TimerClear {
  id: uint;
}

table FetchReq {
  id: uint;
  url: string;
  // header_line: [string];
}

table FetchRes {
  id: uint;
  status: int;
  header_line: [string];
  body: [ubyte];
}

table ReadFileSync {
  filename: string;
}

table ReadFileSyncRes {
  data: [ubyte];
}

table WriteFileSync {
  filename: string;
  data: [ubyte];
  perm: uint;
  // perm specified by https://godoc.org/os#FileMode
}

root_type Base;