#!/usr/bin/env python
# 2023 - Advent Of Code 3

# file = 'input_example.txt'
file = 'input.txt'


def is_num(char):
    if '0' <= char <= '9':
        return True
    return False


def parse_num(y, x):
    pos = x
    # print(f'begin pos: {pos}')
    while pos > 0 and is_num(input_lines[y][pos-1]):
        pos -= 1
    # print(f'begin pos: {pos}')
    n = ""
    while pos < len(input_lines[y]) and is_num(input_lines[y][pos]):
        n += input_lines[y][pos]
        pos += 1
    print(f'num: {int(n)}')
    return int(n), pos


accum = 0
# pylint: disable=consider-using-with
input_lines = [line.strip('\n') for line in open(file, encoding="utf-8")]

# print(input_lines[y][x])

for linenum, line in enumerate(input_lines):
    last_pos = 0
    for charnum, c in enumerate(line):
        if c != '.' and c < '0' or c > '9':
            print(f'found {c} at {charnum},{linenum}')
            if linenum > 0 and charnum > 0:
                if is_num(input_lines[linenum-1][charnum-1]):
                    # print('7')
                    number, last_pos = parse_num(linenum-1, charnum-1)
                    accum += number
            if linenum > 0 and last_pos < charnum:
                if is_num(input_lines[linenum-1][charnum]):
                    # print('8')
                    number, last_pos = parse_num(linenum-1, charnum)
                    accum += number
            if last_pos < charnum+1:
                if is_num(input_lines[linenum-1][charnum+1]):
                    # print('9')
                    number, last_pos = parse_num(linenum-1, charnum+1)
                    accum += number
            last_pos = 0
            if charnum > 0:
                if is_num(line[charnum-1]):
                    # print('4')
                    number, last_pos = parse_num(linenum, charnum-1)
                    accum += number
            if is_num(line[charnum+1]):
                # print('6')
                number, last_pos = parse_num(linenum, charnum+1)
                accum += number
            last_pos = 0
            if linenum < len(input_lines) and last_pos < charnum:
                if is_num(input_lines[linenum+1][charnum-1]):
                    # print('1')
                    number, last_pos = parse_num(linenum+1, charnum-1)
                    accum += number
            if last_pos < charnum:
                if is_num(input_lines[linenum+1][charnum]):
                    # print('2')
                    number, last_pos = parse_num(linenum+1, charnum)
                    accum += number
            if linenum < len(input_lines) and last_pos < charnum+1:
                if is_num(input_lines[linenum+1][charnum+1]):
                    # print('3')
                    number, last_pos = parse_num(linenum+1, charnum+1)
                    accum += number


print(f"sum: {accum}")