local CoreWords = require("CoreWords")
local ds = require("DataStructures")
local istream = require("InputStream")
local Stack, Dictionary, WordInfo, State = ds.Stack, ds.Dictionary, ds.WordInfo, ds.State
local helpers = require("CoreHelpers")
local isNumber, skipWhitespace, parseToken = helpers.isNumber, helpers.skipWhitespace, helpers.parseToken
local machineState = State:new()

function standardInputRefill(): string
	local input = io.read().."\n"
	return input
end

local standardInputStream = istream:new(standardInputRefill)

machineState.activeInputStream = standardInputStream
machineState.activeDataStack = Stack:new()
table.insert(machineState.dictionaries, CoreWords)


while(true) do
	skipWhitespace(machineState)
	local token: string = parseToken(machineState)
	if isNumber(token) then
		machineState.activeDataStack:push(tonumber(token))
	else
		for i, dictionary in ipairs(machineState.dictionaries) do
			local wordinfo = dictionary:lookup(token)
			if wordinfo then
				(wordinfo as WordInfo).func(machineState)
				goto continue
			end
		end
		print(string.format('%q ?', token))
	  ::continue::
  end
end