#!/bin/python3
import sys,re
from pprint import pprint
sys.path.insert(0, '../../')
from fred import list2int

input_f = 'test'

part = 1
#########################################
#                                       #
#              Part 1                   #
#                                       #
#########################################

grid = []

start = ()
prev = ()

def valid_n(grid,cur):
    r,c = cur
    count = 0
    if grid[r-1][c] != ' ':
        count += 1
    if grid[r+1][c] != ' ':
        count += 1
    if grid[r][c+1] != ' ':
        count += 1
    if grid[r][c-1] != ' ':
        count += 1
    return count


if part == 1:
    with open(input_f) as file:
        for line in file:
            grid.append(list(line.rstrip()))

    for r, row in enumerate(grid):
        for c, col in enumerate(row):
            print(grid[r][c],end='')
        print()
            
    for r, row in enumerate(grid):
        for c, col in enumerate(row):
            if r == 0:
                if grid[r][c] == '|':
                    start = (r,c)

    end = False
    cur = start
    prev = (-1,-1)
    prev_dir = {
        'up': False,
        'down': False,
        'left': False,
        'right': False
    }

    while not end:
        r,c = cur
        try:
            if grid[r-1][c] != ' ' and prev != (r-1,c):
                print('up',grid[r-1][c])
                
                prev = cur
                prev_dir = {
                    'up': True,
                    'down': False,
                    'left': False,
                    'right': False
                }
                cur = (r-1,c)
        except Exception as e:
            print(e)
        
        try:
            if grid[r+1][c] != ' ' and prev != (r+1,c):
                print('down',grid[r+1][c])
                if valid_n(grid,cur) >= 1 and prev_dir['down']:
                    prev = cur
                    prev_dir = {
                        'up': False,
                        'down': True,
                        'left': False,
                        'right': False
                    }
                    cur = (r+1,c)
        except Exception as e:
            print(e)
        
        try:
            if grid[r][c-1] != ' ' and prev != (r,c-1) and not prev_dir['left']:
                print('left',grid[r][c-1])
                prev = cur
                prev_dir = {
                    'up': False,
                    'down': False,
                    'left': True,
                    'right': False
                }
                cur = (r,c-1)
        except Exception as e:
            print(e)
        
        try:
            if grid[r][c+1] != ' ' and prev != (r,c+1) and not prev_dir['right']:
                print('right',grid[r][c+1])
                prev = cur
                prev_dir = {
                    'up': False,
                    'down': False,
                    'left': False,
                    'right': True
                }
                cur = (r,c+1)
        except Exception as e:
            print(e)
        input()
    


#########################################
#                                       #
#              Part 2                   #
#                                       #
#########################################
if part == 2:
    exit()