-- Variables
local HEIGHT     = 27
local WIDTH      = 6
local GROWTH_MAX = 7
local SEED_NAME  = "actuallyadditions:item_rice_seed"
local CROP_NAME  = "actuallyadditions:block_rice"
--

if WIDTH % 2 ~= 0 then
  WIDTH = WIDTH + 1
end

function refuel()
  if turtle.getFuelLevel() < 100 then
    turtle.select(1)
    local data = turtle.getItemDetail()
    if data then
      if data.count > 1 then
        turtle.refuel(1)
      else
        print("Awaiting refuel")
        sleep(5)
        refuel() -- RECURSION BABY
      end
    end
  end
end

function farm()
refuel()
  turtle.forward()
  
  local success, data = turtle.inspectDown()
  if not success and data ~= "No block to inspect" then
    print("Failed to get block info: "..data)
  end
  
  if success and data.metadata >= GROWTH_MAX and data.name == CROP_NAME then
    turtle.digDown()
  end
  
  local item = turtle.getItemDetail(2)
  if item and item.name ~= SEED_NAME then
    print("Invalid item in slot 2")
    print("Wanted: "..SEED_NAME)
    print("Found:  "..item.name)
    print("")
    sleep(15)
  elseif not item or item.count == 1 then
    print("Not enough crops left; Cannot plant")
  else
    turtle.select(2)
    turtle.placeDown()
  end
end

print("Started. "..HEIGHT.."x"..WIDTH.." area; Growth level "..GROWTH_MAX..".")

-- Pull fuel from attached top inventory
if true then
  turtle.select(1)
  local data = turtle.getItemDetail()
  if data then
    local count = 64 - data.count
    if count > 0 then
      turtle.suckUp(count)
    end
  end
end

local turnLeft = false

for i = 0, WIDTH - 1 do
  for j = 0, HEIGHT - 1 do
    farm()
  end
  
  if i ~= WIDTH - 1 then
    if turnLeft then
      turtle.turnLeft()
      turtle.forward()
      turtle.turnLeft()
    else
      turtle.turnRight()
      farm()
      turtle.turnRight()
    end
    turnLeft = not turnLeft
  else
    turtle.turnRight()
    for j = 1, WIDTH - 1, 1 do
      refuel()
      turtle.forward()
    end
    
    turtle.turnRight()
  end
end

for i = 3, 16 do
  turtle.select(i)
  turtle.dropDown()
end

print("Done.")