local createCloud = require('/apis/libcloud');
local createVersion = require('/apis/libversion');

local URL_SETTING = 'cloud.url';
local PASSWORD_SETTING = 'cloud.password';
local RECONNECT_EVENT = 'trapos_cloud_reconnect';

local rawArgs = table.pack(...);
local command = rawArgs[1];

local function isBlank(value)
  return type(value) ~= 'string' or value == '';
end

local function printUsage()
  print('cloud usage:');
  print();
  print('  cloud status');
  print('  cloud login [--force|-f] [password]');
  print('  cloud --version');
  print('  cloud --help');
  print();
  print('settings required:');
  print('  cloud.url       (gateway origin, e.g. ws://host:4444)');
  print('settings optional:');
  print('  cloud.password  (shared secret for the hello handshake)');
end

local function readPassword()
  write('Password: ');
  if type(read) == 'function' then return read('*'); end
  if io and type(io.read) == 'function' then return io.read(); end
  return '';
end

local function parseLoginArgs(args)
  local force = false;
  local password = nil;

  for i = 2, args.n do
    local arg = args[i];
    if arg == '--force' or arg == '-f' then
      force = true;
    elseif arg and string.sub(arg, 1, 1) == '-' then
      return nil, 'unknown option: ' .. arg;
    elseif not password then
      password = arg;
    else
      return nil, 'unexpected argument: ' .. tostring(arg);
    end
  end

  return { force = force, password = password }, nil;
end

if command == '--version' or command == '-version' or command == 'version' or command == '-v' then
  print('v' .. createVersion().forSelf());
  return;
end

if command == '--help' or command == '-help' or command == 'help' or command == '-h' then
  printUsage();
  return;
end

if command == 'status' then
  local url = settings.get(URL_SETTING);
  if isBlank(url) then
    print('set cloud.url first');
    return;
  end

  local ok, result = createCloud().request('probe_server');
  if not ok then
    local code = (type(result) == 'table' and result.code) or 'internal';
    local message = (type(result) == 'table' and result.message) or '';
    print('cloud status failed: ' .. tostring(code) .. ' ' .. tostring(message));
    return;
  end

  print('serverOk: ' .. tostring(result.serverOk));
  print('opencodeOk: ' .. tostring(result.opencodeOk));
  if not result.opencodeOk and result.opencodeDetail then
    print('opencode: ' .. tostring(result.opencodeDetail));
  end
  return;
end

if command == 'login' then
  local opts, parseError = parseLoginArgs(rawArgs);
  if parseError then
    print(parseError);
    printUsage();
    return;
  end

  if not opts.force and not isBlank(settings.get(PASSWORD_SETTING)) then
    print('cloud.password is already set; use cloud login --force to replace it');
    return;
  end

  local password = opts.password or readPassword();
  if isBlank(password) then
    print('cloud.password not changed: password cannot be empty');
    return;
  end

  settings.set(PASSWORD_SETTING, password);
  settings.save();
  os.queueEvent(RECONNECT_EVENT);
  print('cloud.password set');
  return;
end

printUsage();