RC1-16.02-Towers-of-Hanoi.py

move_count = 0


def move_disk(remaining_disks, source, target):
    global move_count
    print(f"STEP#{move_count+1}\n"
          f"\t~~> Disk #{remaining_disks}; {source} > {target}")


def count_move():
    global move_count
    move_count += 1


def build_hanoi(remaining_disks, source, target, temp):
    if remaining_disks == 0:
        return 0
    build_hanoi(
        remaining_disks-1, source, temp, target)
    move_disk(remaining_disks, source, target)
    count_move()
    build_hanoi(
        remaining_disks - 1, temp, target, source)


def test_build_hanoi():
    remaining_disks = int(
        input("How many disks you want to solve for (max 8) ?:  "))
    if remaining_disks > 8:
        raise ValueError("You can't play with more than 8 disks. \n"
                         "The printer would run out of print.")
    print(
        f"\t~~> These are the moves for {remaining_disks} disks \n"
        f"\t~~> The top is disk#1, the bottom is the disk#{remaining_disks} \n"
    )
    source = "A"
    temp = "B"
    target = "C"
    build_hanoi(remaining_disks, source, target, temp)
    assert move_count == (2 ** remaining_disks) - 1
    print(f"TOTAL\n"
          f"\t~~> you required {move_count} moves")


if __name__ == "__main__":
    print(" TOWERS OF HANOI SOLUTION PRINTER ".center(80, "-"))
    test_build_hanoi()