Miner 3x3

local args = { ... }
make_safe = 0
l = 0
if #args == 0 then
    print("*Usage: mine <length> <make_safe(default:0)>")
    exit()
else
    length = math.abs(tonumber(args[1]))
    if not args[2] == nil then
        make_safe = math.abs(tonumber(args[2]))
    end
    print("length: "..length)
end

if os.getComputerLabel() == nil then
    oldName = nil
else
    oldName = os.getComputerLabel()
end

os.setComputerLabel("miner_"..math.random(9999999))
print("temporarily changed label to "..os.getComputerLabel())

function select(name)
    for i = 16, 1, -1 do
        turtle.select(i)
        local item = turtle.getItemDetail()
        if turtle.getItemCount() > 0 then
            print(item.name)
            if item.name == name then
                turtle.select(i)
                return true
            end
        end
    end
    turtle.select(1)
    return false
end

function checkSpace()
    slotsFull = 0
    for i = 16, 1, -1 do
        if turtle.getItemCount(i) > 0 then
            slotsFull = slotsFull + 1
        end
    end
    if slotsFull == 16 then
        if select("minecraft:chest") then
            turtle.turnRight()
            turtle.down()
            turtle.place()
            for i = 16, 1, -1 do
                turtle.select(i)
                if turtle.getItemCount() > 0 then
                    local item = turtle.getItemDetail(i)
                    if item.name == "minecraft:torch" or item.name == "minecraft:chest" then
                    else
                        turtle.drop()
                    end
                end
            end
            turtle.select(1)
            turtle.up()
            turtle.turnLeft()
        end
    end
end

function throwAwayCobble()
    cobbles = 0
    for i = 16, 1, -1 do
        if turtle.getItemCount(i) > 0 then
            item = turtle.getItemDetail(i)
            if item.name == "minecraft:cobblestone" then
                cobbles = cobbles + 1
            end
        end
    end
    if cobbles > 1 then
        for i = 1, cobbles - 1, 1 do
            select("minecraft:cobblestone")
            turtle.dropDown()
        end
    end
end

function fuel()
    if turtle.getFuelLevel() < 12 then
        for i = 16, 1, -1 do
            turtle.select(i)
            if turtle.getItemCount() > 0 then
                local item = turtle.getItemDetail(i)
                if item.name == "minecraft:torch" or item.name == "minecraft:chest" then
                else
                    turtle.refuel()
                end
            end
        end
        turtle.select(1)
    end
end

function makeSafe()
    select("minecraft:cobblestone")
    turtle.down()
    local success, block = turtle.inspectDown()
    if success then
        if not block.name == "minecraft:stone" and not block.name == "minecraft:dirt" and not block.name == "minecraft:cobblestone" then
            turtle.digDown()
            turtle.placeDown()
        end
    end
    turtle.up()
end

function make3by3()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnRight()
end

torchDistance = 7



while l <= length do
    l = l + 1
    fuel()
    make3by3()
    if make_safe == 1 then
        makeSafe()
    end
    if torchDistance == 7 then
        if select("minecraft:torch") then
            turtle.turnRight()
            turtle.place()
            turtle.turnLeft()
            turtle.select(1)
        else
            print("no torches found")
        end
        torchDistance = 0
    end
    torchDistance = torchDistance + 1
    turtle.select(1)
    checkSpace()
    turtle.select(1)
    throwAwayCobble()
    turtle.select(1)
end

if not oldName == nil then
    os.setComputerLabel(oldName)
else
    os.setComputerLabel("turtle_"..math.random(9999999))
end