TreeFarm

--*****************
--*****************
--**  Tree Farm  **
--** Created By: **
--**   rhyser9   **
--*****************
--*****************

local sapling
local bonemeal

--******************
--*Gather Materials*
--******************
shell.run('clear')
print "Thank you for using this tree farm."
print "Please place saplings in Slot #1."
  turtle.select(1)
  while turtle.getItemCount(1) == 0 do
    sleep(1)
  end

shell.run('clear')
print "Thank you for using this tree farm."
print "Please place bonemeal in Slot #2."
  turtle.select(2)
  while turtle.getItemCount(2) == 0 do
    sleep(1)
  end

shell.run('clear')
print "Thank you for using this tree farm."
print "Please place a log of the tree your farming in Slot #15."
  turtle.select(15)
  while turtle.getItemCount(15) == 0 do
    sleep(1)
  end

shell.run('clear')
print "Thank you for using this tree farm."
print "Please place some fuel in Slot #16."
  turtle.select(16)
  while turtle.getItemCount(16) == 0 do
    sleep(1)
  end

shell.run('clear')
print "All Materials Recieved"

--*******************
--*Calculate runtime*
--*******************
sapling = turtle.getItemCount(1) - 1
bonemeal = turtle.getItemCount(2) - 1

if sapling <= bonemeal then
  if sapling == 1 then
    print "The program should run 1 time."
  else
    write("The program should run "..sapling.." times.\n")
  end
else
  if bonemeal == 1 then
    print "The program should run 1 time."
  else
    write("The program should run "..bonemeal.." times.\n")
  end
end

--**********************
--*Plant & Grow Sapling*
--**********************
function plant()
  turtle.select(1)
  turtle.place
  turtle.select(2)
  turtle.place
  turtle.select(15)
  if turtle.compare() then
    print "Planting Successful"
  else
    print "Planting Unsuccessful"
    print "Possible Causes:"
    print " * Saplings (2) and Logs (15) don't match"
    print " * Planting Area Blocked"
    print "Terminating Program"
    sleep(2)
    print "Program Terminated"
    error()
  end
end

--**************
--*Harvest Tree*
--**************
function harvest()
  print "Initiating Harvest"
  select(15)
  while turtle.compare do
    turtle.dig
    turtle.digUp
    turtle.up
  end
  turtle.down
  while turtle.detectDown() == false do
    turtle.down
  end
  print "Harvest Completed"
end

--********
--*Refuel*
--********
function refuel()
  while turtle.getFuelLevel() < 20 then
    print "Low Fuel"
    print "Attempting to Refuel"
    turtle.select(16)
    turtle.refuel(1)
    if turtle.refuel() == false then
      print "Couldn't Refuel"
      print "Terminating Program"
      sleep(2)
      print "Program Terminated"
      error()
    end
  end
end

--***********
--*Main Loop*
--***********
while turtle.getItemCount(1) > 1 & turtle.getItemCount(2) > 1 do
  refuel()
  plant()
  harvest()
end

print "Program Completed"