args = {...}
height = tonumber(args[1])
desireSize = tonumber(args[2])
if args[3] then
    hasType = true
else
    hasType = false
end
workType = tostring(args[3])
blocksUsed = 1


-- Digs the required space for the build, one level
function digSpace (n)
    for i=1, 4,1 do
        for i=1, n,1 do
            if turtle.detect() then
                turtle.dig()
            end
            turtle.forward()
        end
        turtle.turnRight()
    end
end

-- Digging over multiple levels
function digHole (height, desireSizeOver)
    desireReSized = desireSizeOver - 1
    for i=1, height,1 do
        digSpace(desireReSized)
        turtle.digUp()
        turtle.up()
    end
    for i=1, height,1 do
        turtle.down()
    end
end

-- Builds a wall, one block tall, leaves the turtle at origin + 1
function buildRoom (n)
    turtle.forward()
    turtle.turnLeft()
    turtle.turnLeft()
    for i=1, n-2,1 do
        placeBlock()
        turtle.back()
        print(i)
    end
    placeBlock()
    turtle.turnRight()
    turtle.back()

    -- Builds one wall segment, used for second and third segment.
    function buildLine (length)
        for i=1, length-2,1 do
            placeBlock()
            turtle.back()
        end
        placeBlock()
        turtle.turnRight()
        turtle.back()
    end

    buildLine(n)
    buildLine(n)

    for i=1, n-3,1 do
        placeBlock()
        turtle.back()
    end
    placeBlock()
    turtle.up()
    turtle.placeDown()
    blocksUsed = blocksUsed + 1
    turtle.back()
    turtle.turnLeft()
end

-- Runs the buildRoom funtion n times to achieve desired height.
function buildWalls (height, desireSize)
    for i=1, height,1 do
        buildRoom(desireSize)
    end
end

function placeBlock ()
    turtle.place()
    if turtle.getItemCount() < 1 then
        turtle.select(turtle.getSelectedSlot() + 1)
    end
end

function usageText ()
    print("Usage: room [Height] [Length of walls] [-d (only digs) / -b (only builds)]")
    print("Example: 'room 2 4 -b' builds a room that is two blocks tall, four blocks long, but does NOT dig the required space")
end
-- check for argument usage
if (height and desireSize) then
    if hasType then
        if (workType == "-d") or (workType == "-b") then
            if workType == "-d" then
                print("Digging...")
                digHole(height, desireSize)
            else
                print("Building...")
                buildWalls(height, desireSize)
            end
        else
            usageText()
            print("debug: failed worktype")
        end
    else
        print("Digging and building...")
        digHole(height, desireSize)
        buildWalls(height, desireSize)
    end
else
    usageText()
    print("debug: no argument(s)")
end