# 1. byrja spurja notanda um row og colum


def seat_to_letter(seats):
    list_seats = ["A", "B", "C", "D", "E", "F"]
    if seats == 2:
        list_seats = list_seats[0:2]
    if seats == 4:
        list_seats = list_seats[0:4]
    if seats == 6:
        list_seats = list_seats[0:6]
    return list_seats


def inp_to_dict(row, list_seats):
    my_dict = {}
    for i in range(1, row+1):
        my_dict[i] = list_seats
    return my_dict


def print_rows(my_dict):
    for key, value in my_dict.items():
        print('{:2}\t'.format(key), end="")
        for k, seat in enumerate(value):
            if k % (len(value) / 2) == 0:
                print(" " * 1, end="")
            print("{} ".format(seat), end="")
        print()




def book_seat_to_list(book_seat):
    my_list = []
    replace_list = []
    my_list.append(book_seat)
    for i in my_list:
        row, seat = i.split(" ")
        replace_list.append((row, seat))
    x = replace_list[0][0]
    y = replace_list[0][1]
    return x, y

def is_seat_taken(my_dict, x, y):
    if y == "A":                    # Allar if setninganar eru til þess að check hvar í listanum sætið er. t.d er sætið(breytan y) er A þá er það fyrsta stakið
        find = 0
    if y == "B":
        find = 1
    if y == "C":
        find = 2
    if y == "D":
        find = 3
    if y == "E":
        find = 4
    if y == "F":
        find = 5
    try:
        for key in my_dict:
            entries = my_dict[key]
            #print(key)
            #print(x,y)
            if key == int(x):                       # Ef lykilinn er sá sami og notandi stimplaði inn
                if entries[find] != "X":            # Ef það er "X" á þeim stað í listanum
                    pass
    except:
        print("Seat taken")




def replace_seat(my_dict, x, y):

    try:
        if int(x) in my_dict.keys():
            if y in [x for v in my_dict.values() for x in v]:
                my_dict[int(x)] = [i.replace(y, 'X') for i in my_dict[int(x)]]
                print_rows(my_dict)
            elif y not in [x for v in my_dict.values() for x in v]:
                print("Seat number is invalid!")
        else:
            print("Seat number is invalid!")

    except:
        print("Seat number is invalid!")
    return my_dict


def main():
    loop = True
    row = int(input("Enter number of rows: "))
    seats = int(input("Enter number of seats in each row: "))
    list_seats = seat_to_letter(seats)
    my_dict = inp_to_dict(row, list_seats)
    inp_to_dict(row, list_seats)
    seat_to_letter(seats)
    print_rows(my_dict)


    while loop:
        book_seat = input("Input seat number (row seat): ")
        x, y = book_seat_to_list(book_seat)
        is_seat_taken(my_dict, x, y)
        my_dict = replace_seat(my_dict, x, y)
        more = input("More seats (y/n)? ")
        if more == "n":
            loop = False



main()