Vanilla Tree Farm v3.0 by rhyser9

--************
--*Print Logo*
--************
function logo()
  shell.run('clear')
  print "***************************************"
  print "*              Tree Farm              *"
  print "*             Version 3.0             *"
  print "*         Created By: rhyser9         *"
  print "***************************************"
  term.setCursorPos(1,6)
end

--*****************
--*Terminate Error*
--*****************
function terminate()
  sleep(1)
  print "Terminating Program..."
  sleep(3)
  print "Program Terminated"
  error()
end

--******************
--*Gather Materials*
--******************
logo()
print "Please place Saplings in Slot #1."
  turtle.select(1)
  while turtle.getItemCount(1) == 0 do
    sleep(1)
  end

logo()
print "Please place bonemeal in Slot #2."
  turtle.select(2)
  while turtle.getItemCount(2) == 0 do
    sleep(1)
  end

logo()
print "Please place a Log in Slot #15."
  turtle.select(15)
  while turtle.getItemCount(15) == 0 do
    sleep(1)
  end

logo()
print "Please place fuel in Slot #16."
  turtle.select(16)
  while turtle.getItemCount(16) == 0 do
    sleep(1)
  end

--*******************
--*Configure Program*
--*******************
logo()
print "Would you like to enable the Resupply function?"
write("(Y/N): ")
input = read()
if input == "Y" or input == "y" then
  resupply = 1
  print "Resupply Mode Enabled"
elseif input == "N" or input == "n" then
  resupply = 0
  print "Resupply Mode not Enabled"
else
  resupplyOn = 0
  print "Couldn't Understand Input"
  print "Resupply Mode not Enabled"
end
sleep(2)

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

logo()
print "Calculating Runtime..."
sleep(2)
if sapling <= bonemeal then
  if sapling == 0 then
    print "Not Enough Items to Run"
    sleep(1)
    print "Terminating Program"
    sleep(3)
    print "Program Terminated"
    error()
  elseif sapling == 1 then
    print "The program should run 1 time."
  else
    write("The program should run "..sapling.." times.\n")
  end
else
  if bonemeal == 0 then
    print "Not Enough Items to Run"
    sleep(1)
    print "Terminating Program"
    sleep(3)
    print "Program Terminated"
    error()
  elseif bonemeal == 1 then
    print "The program should run 1 time."
  else
    write("The program should run "..bonemeal.." times.\n")
  end
end

for i=0,4 do
  write("\nThe program will initiate in "..5 - i.." seconds")
  sleep(1)
end
shell.run('clear')

--********
--*Refuel*
--********
function refuel()
  while turtle.getFuelLevel() < 50 do
    print "  Low Fuel!"
    print "  Refueling..."
    turtle.select(16)
    turtle.refuel(1)
        sleep(2)
    if turtle.refuel() == false then
      print "  Refueling Failed!"
      terminate()
    else
      print "  Turtle Refueled"
    end
  end
end

--**********************
--*Plant & Grow Sapling*
--**********************
function plant()
  print "  Planting Tree..."
  turtle.select(1)
  turtle.place()
  --Bonemeal
  turtle.select(2)
  turtle.place()
  --Verify Process
  turtle.select(15)
  if turtle.compare() then
    print "  Planting Process Successful"
  else
    print "  Planting Process Failed"
    print "  Possible Causes:"
    print "  * Saplings and Logs don't match"
    print "  * Planting Area Blocked"
    terminate()
  end
end

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

--**********
--*Resupply*
--**********
function resupply()
  local i = 0
  --Saplings
  turtle.suckDown()
  --Fuel
  turtle.turnRight()
  turtle.suck()
  --Bonemeal
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.suck()
  --Drop Off Extras
  turtle.turnRight()
  while i ~= 10 do
    turtle.select(4 + i)
    turtle.drop()
    i = i + 1
  end
  turtle.select(15)
  turtle.drop(turtle.getItemCount(15) - 1)
  turtle.turnLeft()
  turtle.turnLeft()
end

--***********
--*Main Loop*
--***********
local resupplyOn

logo()
while turtle.getItemCount(1) > 1 and turtle.getItemCount(2) > 1 do
  logo()
  print "Farming Cycle Initiated"
  refuel()
  plant()
  harvest()
  if resupplyOn == 0 then
    resupply()
  end
  print "Farming Cycle Completed"
end

print "Program Completed"