App

-- https://turtleappstore.com/u/UltraBob/a/farmstuff
--[[Wheat Farming program by Al Sweigart
Plants and harvests wheat.
Assumes a field is in front and
to the right of the turtle,
with a chest behind it.]]

os.loadAPI('hare')
os.loadAPI('bobdule')

local farmables = {}
farmables["minecraft:carrots"] = "minecraft:carrot"
farmables["minecraft:potatoes"] = "minecraft:potato"
farmables["minecraft:wheat"] = "minecraft:wheat_seeds"
farmables["minecraft:beetroots"] = "minecraft:beetroot_seeds"

-- handle command line arguments
local cliArgs = {...}
local length = tonumber(cliArgs[1])
local width = tonumber(cliArgs[2])

if cliArgs[3] and farmables[bobdule.makeBlockName(cliArgs[3])] then
  defaultcrop = farmables[bobdule.makeBlockName(cliArgs[3])]
else
  defaultcrop = "minecraft:wheat_seeds"
end
print("default crop is " .. defaultcrop)
-- display "usage" info
if length == nil or width == nil or cliArgs[1] == '?' then
  print('Usage: farmwheat <length> <width> [defaultcrop]')
  print('This program expects the turtle to be starting')
  print('at the rear left of the field with chest behind')
  print('optional defaultcrop can be carrots, potatoes, or wheat')
  print('It is a good idea to seed me with my default crop before beginning')
  return
end

print('Hold Ctrl-T to stop.')

-- check that chest is there
if not hare.findBlock('minecraft:chest') then
  error('Must start next to a chest.')
end

-- face field
turtle.turnLeft()
turtle.turnLeft()


-- checkCrop() harvests mature crops and replants.
-- If the space is empty it defaults to the default provided
-- If no default is provided it defaults to wheat.
function checkCrop()
  local result, block = turtle.inspectDown()

  if not result then
    turtle.digDown() -- till the soil

    plantSeed(defaultcrop)
  elseif block ~= nil and (block.state.age == 7 or (block.name == "minecraft:beetroots" and block.state.age == 3)) then
    if farmables[block['name']] then
      -- collect crop and replant
      turtle.digDown()
      print('Collected ' .. block['name'] .. '.')
      plantSeed(farmables[block['name']])
    end
  end
end


-- plantWheatSeed() attempts to plant
-- a wheat seed below the turtle
function plantSeed(crop)
  if not hare.selectItem(crop) then
    print('Warning: Low on ' .. crop .. '.')
  else
    turtle.placeDown() -- plant a seed
    print('Planted ' .. crop .. ' seed.')
  end
end


-- storeWheat() puts all wheat into an
-- adjacent chest
function storeCrops()
  -- face the chest
  if not hare.findBlock('minecraft:chest') then
    error('Could not find chest.')
  end

  -- store wheat in chest
  local counter = 0
  for _, item in pairs(farmables) do
    if item == "minecraft:wheat_seeds" then
      item = "minecraft:wheat"
      counter = 1
    elseif item == "minecraft:beetroot_seeds" then
      item = "minecraft:beetroot"
      counter = 1
    else

    end
    print('selecting ' .. item)
    while hare.selectItem(item) do
      if counter == 0 then
        print("Keeping the first ",  item, ' for planting')
        counter = counter + 1
      else
        print('Dropping off ', turtle.getItemCount(), ' ', item .. '...')
        if not turtle.drop() then
          error('Chest is full!')
        end
      end
    end
  end
  for slot = 1, 16 do
    turtle.select(slot)
    data = turtle.getItemDetail()
    if data and data.name == "minecraft:poisonous_potato" then turtle.dropUp() end
  end

  -- face field again
  turtle.turnLeft()
  turtle.turnLeft()
end


-- begin farming
while true do
    -- check fuel
  if turtle.getFuelLevel() < (length * width + length + width) then
    error('Turtle needs more fuel!')
  end

  -- farm wheat
  print('Sweeping field...')
  hare.sweepField(length, width, checkCrop)
  storeCrops()

  print('Sleeping for 10 minutes...')
  countdown = 10
  for i = 1, 10 do
    print("Timeleft: ", countdown, " minutes")
    os.sleep(60)
    countdown = countdown - 1
  end
  -- os.sleep(600)
end