area_level

turtle_location = vector.new(0, 0, 0)
area_size = vector.new(0, 0, 0)

-- Gets user input
function get_size()
    print("How long?")
    area_size.x = tonumber(read())
    print("How wide?")
    area_size.y = tonumber(read())
    print("How tall?")
    area_size.z = tonumber(read())
end

-- Move the turtle 1 to the right
function move_right()
    turtle.turnRight()
    while turtle.detect() do
        turtle.dig()
    end
    while not turtle.forward() do os.sleep(5) end
    turtle.turnLeft()
    turtle_location.y = turtle_location.y + 1
end

-- Clears up to Z height.
function clear_up()
    repeat
        while turtle.detectUp() do
            turtle.digUp()
        end
        while not turtle.up() do os.sleep(5) end
        turtle_location.z = turtle_location.z + 1
    until turtle_location.z >= area_size.z-1

    repeat
        while not turtle.down() do os.sleep(5) end
        turtle_location.z = turtle_location.z - 1
    until turtle_location.z == 0
end

-- Dig straight up, then return to base height.
-- Move forward 1. Repeat dig up procedure.
-- Clears a row up to Z height.
function x_clear()
    print("starting x_clear")
    clear_up()
    while turtle_location.x < area_size.x-1 do
        while turtle.detect() do
            turtle.dig()
        end
        while not turtle.forward() do os.sleep(5) end
        clear_up()
        turtle_location.x = turtle_location.x + 1
    end

    repeat
        while not turtle.back() do os.sleep(5) end
        turtle_location.x = turtle_location.x - 1
    until turtle_location.x == 0
end

function area_clear()
    x_clear()
    while turtle_location.y < (area_size.y-1) and area_size.y ~= 1 do
        move_right()
        x_clear()
    end

    turtle.turnLeft()
    repeat
        while not turtle.forward() do os.sleep(5) end
        turtle_location.y = turtle_location.y - 1
    until turtle_location.y == 0

    turtle.turnRight()
end

get_size()
area_clear()