TallTunnel

--pastebin get JWrTxV1z MakeRoom
--pastebin get SpEd82Jp StripLayer
--pastebin get 7JMXTNu5 TallTunnel
local tArgs = { ... }

if #tArgs ~= 2 then
        print( "Usage: TallTunnel <length> <height>" )
        print( "Slot 1 should be a non-wood floor block" )
        print( "Slot 2 should be a fuel" )
        print( "Slot 3 should be a stack of chests" )
        print( "Slot 4 should be a stack of torches" )
        return
end

-- Mine in a quarry pattern until we hit something we can't dig
local length = tonumber( tArgs[1] )
local tall = tonumber( tArgs[2] )

if length < 1 then
        print( "Tunnel length must be positive" )
        return
end

if tall < 1 then
        print( "Tunnel height must be positive" )
        return
end

local depth = 0
local collected = 0
local unloaded = 0

local function collect()
        collected = collected + 1
        if math.fmod(collected, 25) == 0 then
                print( "Mined "..collected.." items." )
        end
end

local function isFull()
        local bFull = true
        local nTotalItems = 0
        for n=1,16 do
                local nCount = turtle.getItemCount(n)
                if nCount == 0 then
                        bFull = false
                end
                nTotalItems = nTotalItems + nCount
        end

        if bFull then
                print( "No empty slots left." )
                return true
        end
        return false
end

local function unload()
        print( "Unloading items..." )
        turtle.turnRight()
        turtle.turnRight()
        turtle.select(3)
        turtle.place()
        --1: Flooring
        --2: Fuel
        --3: Chests
        --4: Torches
        for n=5,16 do
                unloaded = unloaded + turtle.getItemCount(n)
                turtle.select(n)
                turtle.drop()
        end
        --collected = 0
        turtle.select(1)
        turtle.turnRight()
        turtle.turnRight()
end


local function tryDig()
        while turtle.detect() do
                if turtle.dig() then
                        collect()
                        sleep(0.5)
                else
                        return false
                end
        end
        return true
end

local function tryDigUp()
        while turtle.detectUp() do
                if turtle.digUp() then
                        collect()
                        sleep(0.5)
                else
                        return false
                end
        end
        return true
end

local function refuel()
        local fuelLevel = turtle.getFuelLevel()
        if fuelLevel == "unlimited" or fuelLevel > 0 then
                return
        end

        local function tryRefuel()
                for n=2,16 do
                    if n ~= 3 and n ~= 4 then
                        if turtle.getItemCount(n) > 0 then
                                turtle.select(n)
                                if turtle.refuel(1) then
                                        turtle.select(1)
                                        return true
                                end
                        end
                    end
                end
                turtle.select(1)
                return false
        end

        if not tryRefuel() then
                print( "Add more fuel to continue." )
                while not tryRefuel() do
                        sleep(1)
                end
                print( "Resuming Tunnel." )
        end
end

local function tryUp()
        refuel()
        while not turtle.up() do
                if turtle.detectUp() then
                        if not tryDigUp() then
                                return false
                        end
                elseif turtle.attackUp() then
                        collect()
                else
                        sleep( 0.5 )
                end
        end
        return true
end

local function tryDown()
        refuel()
        while not turtle.down() do
                if turtle.detectDown() then
                        if not tryDigDown() then
                                return false
                        end
                elseif turtle.attackDown() then
                        collect()
                else
                        sleep( 0.5 )
                end
        end
        return true
end

local function tryForward()
        refuel()
        if isFull() then
            unload()
        end
        while not turtle.forward() do
                if turtle.detect() then
                        if not tryDig() then
                                return false
                        end
                elseif turtle.attack() then
                        collect()
                else
                        sleep( 0.5 )
                end
        end
        return true
end

local function hallway(hallLength)
    for n=1,hallLength do
        turtle.placeDown()
        turtle.turnLeft()
        tryDig()
        for m=2, tall do
            tryDigUp()
            tryUp()
            tryDig()
        end
        turtle.turnRight()
        turtle.turnRight()
        tryDig()
        for m=2, tall do
            tryDown()
        tryDig()
        end
        if math.fmod(n, 6) == 0 then
            turtle.select(4)
            turtle.place()
            turtle.select(1)
        end
        turtle.turnLeft()

        if n<hallLength then
                tryDig()
                if not tryForward() then
                        return false
                end
        else
                return true
        end
    end
end

print( "Tunnelling..." )


hallway(length)


print( "Tunnel complete." )
print( "Mined "..collected.." items total." )