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

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

local standardInputStream = istream:new(standardInputRefill)

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


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