ClearArea

local args = {...}
local height = tonumber(args[1])
local length = tonumber(args[2])
local width = tonumber(args[3])

print ("Height: " .. height .. "\n")
print ("Length: " .. length .. "\n")
print ("Width: " .. width .. "\n")

local data = turtle.getItemDetail(1) -- fuel slot 1
local fuelType = data.name

function checkFuel ()
    if turtle.getFuelLevel() <= 0 then
        print ("no fuel\n")
        for i = 1, 16, 1 do
            if turtle.getItemDetail(i).name == fuelType then
                turtle.select(i)
                turtle.refuel()
                print ("refuel\n")
                return true
            end
        end

        print ("out of fuel\n")
        return false
    end

    return true
end

function dig ()
    while turtle.detect() do
        turtle.dig()
    end
end

function digUp ()
    while turtle.detectUp() do
        turtle.digUp()
    end
end

function digDown ()
    while turtle.detectDown() do
        turtle.digDown()
    end
end

local len = 0
local last = "down"
local lastT = "left"

checkFuel()

dig()
turtle.forward()
len = len + 1

while true do
    checkFuel()

    for i = 1, height - 1, 1 do
        if last == "down" then
            digUp()
            turtle.up()
        else
            digDown()
            turtle.down()
        end
    end

    if last == "down" then last = "up"
    else last = "down" end

    if len < length then
        dig()
        turtle.forward()
        len = len + 1
    elseif len >= length then
        len = 1
        if lastT == "left" then turtle.turnRight()
        else turtle.turnLeft() end
        dig()
        turtle.forward()
        if lastT == "left" then
            turtle.turnRight()
            lastT = "right"
        else
            turtle.turnLeft()
            lastT = "left"
        end
    end
end