CC Coalbot

local instructions = [[
WOOD PHASE


    fill inv with logs

    go up, up, left

    dump portion of wood into right hopper

    go left, fwd, right

    dump portion of wood into left hopper

    go down, down, right, fwd

    dump remaining wood into output




COAL PHASE


    go left

    fill inv with coal

    check own fuel level

    go left up

    refill right furnace

    go left, fwd, right

    refill left furnace

    go left, fwd, left

    put portion of fuel into collector chest

    go left, fwd, fwd, right

    put portion of fuel into harvester chest

    go left, down

    dump remaining coal into ouptut

]]
local right_hopper_portion = 28
local left_hopper_portion = 28
local collector_portion = 16
local harvester_portion = 16
local check_fuel
check_fuel = function()
  print("Checking fuel level...")
  if turtle.getFuelLevel() < 100 then
    print("Fuel low, refueling...")
    turtle.refuel(10)
  end
  return print("Fuel level: ", turtle.getFuelLevel())
end
local tally_items
tally_items = function()
  local slot_count = turtle.getItemCount()
  if slot_count == nil then
    slot_count = 0
  end
  for i = 1, 16 do
    turtle.select(i)
    local tally = tally + slot_count
  end
  return tally
end
local fill_inv
fill_inv = function(direction)
  for i = 1, 16 do
    turtle.select(i)
    if direction == "up" then
      turtle.suckUp()
    elseif direction == "forward" then
      turtle.suck()
    elseif direction == "down" then
      turtle.suckDown()
    end
  end
end
local portion_dump
portion_dump = function(amount)
  local amount_to_dump = amount
  for i = 1, 16 do
    turtle.select(i)
    if amount_to_dump < 1 then
      break
    end
    local slot_count = turtle.getItemCount()
    if slot_count == nil then
      slot_count = 0
    end
    if slot_count > 0 then
      for i = 1, slot_count do
        turtle.drop(1)
        amount_to_dump = amount_to_dump - 1
        if amount_to_dump < 1 then
          break
        end
      end
    end
  end
end
local fill_furnace
fill_furnace = function()
  for i = 1, 16 do
    turtle.select(i)
    if turtle.getItemDetail == "minecraft:coal" then
      turtle.drop()
    end
  end
end
local wood_phase
wood_phase = function()
  fill_inv("down")
  local tally = tally_items()
  turtle.up()
  turtle.up()
  turtle.turnLeft()
  portion_dump((tally() * (28 / 64)))
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
  portion_dump((tally() * (28 / 64)))
  turtle.down()
  turtle.down()
  turtle.turnRight()
  turtle.forward()
  return portion_dump((tally() * (64 / 64)))
end
local coal_phase
coal_phase = function()
  turtle.turnLeft()
  fill_inv("forward")
  check_fuel()
  turtle.turnLeft()
  turtle.up()
  fill_furnace()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
  fill_furnace()
  local tally = tally_items()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
  portion_dump((tally() * (16 / 64)))
  turtle.turnLeft()
  turtle.forward()
  turtle.forward()
  turtle.turnRight()
  portion_dump((tally() * (16 / 64)))
  turtle.turnLeft()
  turtle.down()
  return portion_dump((tally() * (64 / 64)))
end
while true do
  wood_phase()
  coal_phase()
end