local firstArg = ...;

if firstArg == '-version' or firstArg == '--version' then
  print('v' .. require('/apis/libversion')().forSelf());
  return;
end

if firstArg == '-help' or firstArg == '--help' then
  print('Usage: router [-silent|--silent]');
  print('Enables routing on this machine. Registers handlers on the boot eventloop.');
  return;
end

local silent = (firstArg == '-silent' or firstArg == '--silent');
local printVerbose = silent and function() end or print;

local createEventLoop = require('/apis/eventloop');
local createNet = require('/apis/net');
local createRouter = require('/apis/librouter');

local ownsLoop = false;
if not _G.bootEventLoop then
  _G.bootEventLoop = createEventLoop();
  ownsLoop = true;
end

local net = createNet();
net.setRouter(true);

local router = createRouter();

net.listen('router.register', function(payload, packet)
  if type(payload) ~= 'table' or type(payload.label) ~= 'string' then return end
  local ok = router.register(payload.label, packet.sourceId);
  if ok then
    printVerbose("router: registered '" .. payload.label .. "' -> " .. tostring(packet.sourceId));
  else
    printVerbose("router: duplicate label '" .. payload.label .. "' from id " .. tostring(packet.sourceId));
  end
end);

net.onUnrouted(function(packet)
  if type(packet.destId) == 'string' then
    local id = router.resolve(packet.destId);
    if id then
      packet.destId = id;
    else
      printVerbose("router: unknown label '" .. tostring(packet.destId) .. "' (dropping)");
      return;
    end
  end

  if packet.destId then
    printVerbose("router: " .. tostring(packet.sourceId) .. " -> " .. tostring(packet.destId)
      .. " [" .. tostring(packet.service) .. "/" .. tostring(packet.kind) .. "]");
  else
    printVerbose("router: " .. tostring(packet.sourceId) .. " broadcast"
      .. " [" .. tostring(packet.service) .. "/" .. tostring(packet.kind) .. "]");
  end

  net.rebroadcast(packet);
end);

printVerbose('router v' .. require('/apis/libversion')().forSelf()
  .. ' started on bus channel ' .. tostring(net.BUS_CHANNEL));

if ownsLoop then
  _G.bootEventLoop.startLoop();
end