-- improved version of clearCube by BlockPortal
-- http://turtlescripts.com/project/gjdh1o-clearCube
-- improved by truhgoj
-- Clears a x by y by z area

local FUEL_SLOT = 1
local FUEL_ENDERCHEST = 0
local STORAGE_ENDERCHEST = 0

--should the turtle dig up
local shouldDigUp = true

-- @return true if any slot is empty
function slotsEmpty()
    for i=1, 16 do
        if turtle.getItemCount(i) < 1 then
            return true
        end
    end
    return false
end

function clear()
    term.clear()
    term.setCursorPos(1,1)
end

function up()
    while not turtle.up() do
        turtle.digUp()
    end
end

function down()
    while not turtle.down() do
        turtle.digDown()
    end
end

function forward()
    while not turtle.forward() do
        turtle.dig()
    end
end

function back()
    while not turtle.back() do
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.dig()
        turtle.turnLeft()
        turtle.turnLeft()
    end
end

function clearLine()
    for i = 1, depth do

        turtle.dig()
        forward()
        turtle.digUp()
        turtle.digDown()
    end

    for i = 1, depth do
        back()
    end
end

function clearWall()
    local i=1
    while i <= height do
        end

        if shouldDigUp then turtle.digUp() else turtle.digDown() end

        if i < height and i > 1  then
            if shouldDigUp then up() else down() end
            if shouldDigUp then turtle.digUp() else turtle.digDown() end
            i = i + 1
        end

        if i < height  then
            if shouldDigUp then up() else down() end
            if shouldDigUp then turtle.digUp() else turtle.digDown() end
            i = i + 1
        end

        clearLine()
        if shouldDigUp then up() else down() end
        i = i +1
    end

    for i = 1, height do
        if shouldDigUp then down() else up() end
end

function clearCube()
    for i = 1, width do
        clearWall()
        turtle.turnRight()
        forward()
        turtle.turnLeft()
    end

    turtle.turnLeft()

    for i = 1, width+1 do
        forward()
    end

    turtle.turnRight()
end

tArgs = {...}

--print(tArgs[1] .. " " .. type(tArgs[1]) .. " " .. tArgs[2] .. " " .. type(tArgs[2]) .. " " .. tArgs[3] .. " " .. type(tArgs[3]))

if type(tArgs[1]) == "string" and type(tArgs[2]) == "string" and type(tArgs[3]) == "string" and tonumber(tArgs[1]) > 0 and tonumber(tArgs[2]) > 0 and tonumber(tArgs[3]) ~= 0 then
    depth = tonumber(tArgs[1])
    width = tonumber(tArgs[2])
    height = tonumber(tArgs[3])
else
    term.write("Insert depth: ")
    depth = tonumber(read())
    print(" ")

    term.write("Insert width: ")
    width = tonumber(read())
    print(" ")

    term.write("Insert height: ")
    height = tonumber(read())
    print(" ")
end

refuel()

if height < 0 then
    height = height * (-1)
    shouldDigUp = false
end

height = height -1
clearCube()