#!/usr/bin/env python3.11
from collections.abc import Iterable
from common import *


def all_equals(points: list[Point]) -> bool:
    first = points[0]
    logging.debug(f"testing {points} with value {first}")
    return all(map(lambda x: x == first, points))


def farthest_length(labyrinth: Labyrinth) -> int:
    length = 1
    current_vectors = list(
        ((labyrinth.start, point) for point in labyrinth.first_points)
    )
    logging.debug(f"first vectors: {current_vectors}")
    current_points = list(vector[1] for vector in current_vectors)
    logging.debug(current_points)
    while not all_equals(current_points):
        new_vectors = []
        new_points = []
        for vector in current_vectors:
            new_vector = (vector[1], movement(vector[1], vector[0], labyrinth))
            new_vectors.append(new_vector)
            new_points.append(new_vector[1])
        current_vectors = new_vectors
        current_points = new_points
        length += 1
    return length


if __name__ == "__main__":
    print(farthest_length(parse("input.txt")))