#!/usr/bin/env python3
from pathlib import Path


def fold(axis, fold_at, dots):
    new_dots = set()
    for (x, y) in dots:
        if axis == 'x':
            new_x = fold_at - abs(x - fold_at)
            if new_x != fold_at:
                new_dots.add((new_x, y))
        elif axis == 'y':
            new_y = fold_at - abs(y - fold_at)
            if new_y != fold_at:
                new_dots.add((x, new_y))
    return new_dots


def part_1(input):
    result = 0
    dots = set()
    instructions = []
    for line in input:
        if ',' in line:
            x, y = line.strip().split(',')
            dots.add((int(x), int(y)))
        elif 'fold along' in line:
            d, c = line.strip().split()[-1].split('=')
            instructions.append((d, int(c)))
    axis, fold_at = instructions.pop(0)
    dots = fold(axis, fold_at, dots)
    result = len(dots)
    print("Part 1 result:", result)


def part_2(input):
    result = 0
    dots = set()
    instructions = []
    for line in input:
        if ',' in line:
            x, y = line.strip().split(',')
            dots.add((int(x), int(y)))
        elif 'fold along' in line:
            d, c = line.strip().split()[-1].split('=')
            instructions.append((d, int(c)))
    while len(instructions):
        axis, fold_at = instructions.pop(0)
        dots = fold(axis, fold_at, dots)
    max_x = max([x for x, _ in dots])
    max_y = max([y for _, y in dots])
    print("Part 2 result:")
    for y in range(max_y):
        for x in range(max_x):
            if (x, y) in dots:
                print('█', end='')
            else:
                print('░', end='')
        print()


input = list()
p = Path(__file__).with_name('input.txt')
with open(p) as f:
    input = f.readlines()
    part_1(input)
    part_2(input)