TerminalAPI

function xPrint(str, x, y)
  term.setCursorPos(x, y)
  term.write(str)
end

function printCentered(str, y)
  term.setCursorPos(w/2 - #str/2 + 1, y)
  term.write(str)
end

function printRight(str, y, xoffset)
  xoffset = xoffset or 0
  term.setCursorPos(w - xoffset - (#str - 1), y)
  term.write(str)
end

function printLeft(str, y, xoffset)
  xoffset = xoffset or 0
  term.setCursorPos(1 + xoffset, y)
  term.write(str)
end

function printSpacedOut(tab, y, leftEdge, rightEdge)
  rightEdge = rightEdge or w
  leftEdge = leftEdge or 0
  local letters = 0
  for i in pairs(tab) do
    letters = letters + #tab[i]
  end
  local freeSpace = (rightEdge-leftEdge)+1-letters
  term.setCursorPos(leftEdge, y)
  if (freeSpace/(#tab+1))%1 == 0 then
    for i in ipairs(tab) do
      term.write(string.rep(" ", freeSpace/(#tab+1))..tab[i])
    end
  elseif (freeSpace/(#tab))%2 == 0 then
    term.write(string.rep(" ", (freeSpace/#tab)/2))
    for i in ipairs(tab) do
      term.write(tab[i]..string.rep(" ", freeSpace/#tab))
    end
  elseif freeSpace == #tab-1 then
    term.write(tab[1])
    for i = 2, #tab do
      term.write(" "..tab[i])
    end
  else
    local spacing
    for i in ipairs(tab) do
      spacing = round(freeSpace/(#tab-i+2))
      term.write(string.rep(" ", spacing)..tab[i])
      freeSpace = freeSpace - spacing
    end
  end
end

--tab must be a list of strings with no string longer than space
function printWrapped(tab, x, y, space, sep)
  local sep = sep or " "
  local spaceLeft = space
  local leftEdge = x
  for word = 1, #tab do
    if space < #tab[word] + #sep then
      return false
    elseif spaceLeft >= #tab[word]+#sep then
      xPrint(tab[word]..sep, x, y)
      spaceLeft = spaceLeft - (#tab[word]+#sep)
      x += #tab[word]+#sep
    else
      y++
      spaceLeft = space
      xPrint(tab[word]..sep, x, y)
      spaceLeft = spaceLeft - (#tab[word]+#sep)
      x = leftEdge + (#tab[word]+#sep)
    end
  end
  return y
end

function verticalLine(x, y1, y2, startSymbol, endSymbol)
  for i = y1, y2 do
    xPrint("|", x, i)
  end
  if startSymbol then
    xPrint(startSymbol, x, y1)
    xPrint((endSymbol or startSymbol), x, y2)
  end
end

function split(inputstr, sep)
  if inputstr == nil then
    return nil
  elseif sep == nil then
    sep = "%s"
  end
  local t, i = {}, 1
  for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
    t[i] = str
    i = i + 1
  end
  return t
end

function round(float, dez, half)
  half = half or 0.5
  dez = dez or 1
  return math.floor(float/dez+half)*dez
end

function close()
  term.clear()
  term.setCursorPos(1,1)
  if term.isColor() then
    term.setTextColor(colors.yellow)
    print(os.version())
    term.setTextColor(colors.white)
  else
    print(os.version())
  end
  term.setCursorPos(1, 2)
end