#!/usr/bin/env python3

from logging import debug, DEBUG, basicConfig
from sys import argv


io: dict[str, list[str]] = {}
paths: list[list[str]] = []


def parse_input(input_filepath: str) -> dict[str, list[str]]:

    with open(file=input_filepath, mode="r") as input_file:
        input_data: list[str] = input_file.readlines()

    debug(f"\n\nRAW INPUT: {input_data}\n\n")

    input_dict = {}
    for line in input_data:
        input_dict[line.strip().split(":")[0]] = line.strip().split(" ")[1:]

    return input_dict


def traverse_path(path: list[str]):
    global paths
    if path[len(path) - 1] == "out":
        paths.append(path)
        return
    elif path[len(path) - 1] in path[:-1]:
        return
    for p in io[path[len(path) - 1]]:
        traverse_path(path + [p])


def find_paths():
    global paths
    path = ["you"]
    traverse_path(path)


def main() -> None:
    global io
    global paths
    input_filepath = "input/server_rack.txt"
    io = parse_input(input_filepath)
    debug(f"INPUT DICT: {io}")
    find_paths()
    debug(f"PATHS FOUND: {paths}")
    print(f'There are {len(paths)} paths from "you" to "out"')
    return


if __name__ == "__main__":
    if "-d" in argv or "--debug" in argv:
        basicConfig(filename="debug.log", level=DEBUG)
    main()
    exit(0)