"""
Allows the user to save the calls to random to a file, and get the exact same back later
"""

import random

loaded_data = []
save_file = None


def start_saving(filename):
    """"""
    global save_file
    finish_saving()
    save_file = open(filename, 'w')


def finish_saving():
    """"""
    global save_file
    if save_file is not None:
        save_file.close()
        save_file = None


def restore(filename):
    """"""
    global loaded_data
    global save_file
    for line in open(filename):
        loaded_data.append(int(line))


def randint(low, up):
    """"""
    global loaded_data
    global save_file
    if len(loaded_data) > 0:
        value = loaded_data[0]
        saved = value
        loaded_data = loaded_data[1:]
        if value < low or value > up:
            value = random.randint(low, up)
    else:
        value = random.randint(low, up)
        saved = value
    if save_file:
        save_file.write(str(saved) + '\n')
    return value