local t = 4
local h = 0
local s = 16
local tArgs = {...}
if #tArgs < 1 then
  print("Usage: trees <area>")
  return
end

--[[function home()
  rednet.open("right")
  loc = {gps.locate(3,false)}
  if loc[1],loc[2],loc[3] ~= -466, 63, 2298 then
    if turtle.detect() then
      turtle.dig()
    end
    turtle.forward()
    tempLoc = {gps.locate(3,false)}
    turtle.back()
    if loc[1] - tempLoc[1] == 1 then
      dir = 2
    elseif
      loc[1] - tempLoc[1] == -1 then
      dir = 0
      turtle.turnLeft()
      turtle.turnLeft()
    elseif
      loc[3] - tempLoc[3] == 1 then
      dir = 3
      turtle.turnLeft()
    elseif
      loc[3] - tempLoc[3] == -1 then
      dir = 1
      turtle.turnRight()
    end
     travel = {loc[1] - -466, loc[2] - 63, loc[3] - 2298}
  if travel[1] > 0 then
    turtle.turnLeft()
    turtle.turnLeft()
    for i = 1,travel[1] do
      if turtle.detect()then
        turtle.dig()
      end
      turtle.forward()
    end
  elseif travel[1] < 0 then
    for i = travel[1],0 do
      if turtle.detect() then
        turtle.dig()
      end
      turtle.forward()
    end
  end
  if travel[3] < 0 then
end
]]--

function usage()
  print("Place saplings into slot 2, and a single piece of wood that corresponds to the type of sapling you are using into slot 1")
end

function check()
  if turtle.getItemCount(1) == 0 or turtle.getItemCount(2) == 0 then
    print(usage())
   exit()
  end
end

function failsafe()
    turtle.select(2)
    if turtle.compare() == false then
        turtle.select(1)
        if turtle.compare() == false then
            print("Lost. Quitting for safety")
        end
    exit()
    end
end

function fwd()
    if turtle.detect() then
        turtle.dig()
    end
    turtle.attack()
    turtle.forward()
end

function cut()
  turtle.select(1)
  if turtle.compare() then
    turtle.dig()
    turtle.forward()
    while turtle.compareUp() do
      turtle.digUp()
      turtle.up()
      h = h + 1
    end
    for i = 1,h do
      turtle.down()
    end
    turtle.back()
  end
  turtle.select(2)
  turtle.place()
end

function move()
  turtle.turnRight()
  for i = 1,2 do
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
  end
  turtle.turnLeft()
end

function line()
  for i = 1,tArgs[1]-1 do
    cut()
    move()
  end
  cut()
end

function switchLine()
  turtle.turnLeft()
  for i = 1,(tArgs[1]*2-1) do
    turtle.forward()
  end
  turtle.turnLeft()
  for i = 1,2 do
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
  end
  turtle.turnLeft()
  if turtle.detect() then
    turtle.dig()
  end
  turtle.forward()
  turtle.turnLeft()
end

function deposit()
  local tWood = turtle.getItemCount(1)
  local tSaplings = turtle.getItemCount(2)
  turtle.turnLeft()
  for i = 1,tArgs[1]*2-1 do
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
  end
  turtle.turnRight()
  for i = 1,tArgs[1]*2-2 do
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
  end
  turtle.turnLeft()
  turtle.select(2)
  turtle.suck()
  turtle.drop(1)
  turtle.select(1)
  turtle.drop(tWood - 1)
  for i = 3,16 do
    turtle.select(i)
    turtle.drop()
  end
  turtle.turnLeft()
  turtle.turnLeft()
    if turtle.detect() then
        turtle.dig()
    end
    turtle.forward()
  end
  turtle.turnLeft()
end


local s = 10

while true do
check()
for i = 1,tArgs[1]-1 do
  line()
  switchLine()
end
line()
deposit()
failsafe()
s = 10
for i = 1,10 do
  term.clear()
  term.setCursorPos(1,1)
  print("Waiting "..s.." minutes for the trees to grow")
  s = 10 - i
  sleep(60)
end
end