local event = require("event")
local term = require("term")
local shell = require("shell")
term.clear()

local args = shell.parse(...)
local path = " "
local speed = 2
if #args == 1 then
  path = args[1]
elseif #args == 2 then
  path = args[1]
  speed = tonumber(args[2])
else
  print("Usage: typer FILE [speed]")
  print("FILE - путь к файлу")
  print("speed - опционально, сколько будет печататься букв при нажитии кнопки")
  os.exit(0)
end

local file = io.open(path)

local function counts(test)
  local numb=1
  while true do
    local subs = string.sub(test,1,speed*numb)
    local lens = string.len(subs)
    local subs2 = string.sub(test,1,speed*numb+1)
    local lens2 = string.len(subs2)
    numb=numb+1
    if lens==lens2 then
      return numb-1
    end
  end
end
 
local function doubling(linen,mi)
    local n1 = (speed*mi)-(speed-1)
    local n2 = speed*mi
    local subs = string.sub(linen,n1,n2)
    return subs
end

for line in file:lines() do
  local count= counts(line)
  for i=1,count do
  event.pull("key_up")
    if event.pull("key_up") then
      io.write(doubling(line,i))
    end
  end
  io.write("\n")
end