# print the board
# take user input
# check win or tie
# switch the player
# check win or tie again


board = [
            "-","-","-",
            "-","-","-",
            "-","-","-"
        ]

current_player = "X"
winner = None
game_running = True

# 1. print board
def print_board(board):
    print(board[0] + " | " + board[1] + " | " + board[2])
    print(board[3] + " | " + board[4] + " | " + board[5])
    print(board[6] + " | " + board[7] + " | " + board[8])

# 2. take user input
def take_player_input(board):
    try:
        inp = int(input("Enter a number 1-9: "))
        if inp >= 1 and inp <= 9 and board[inp-1] == "-":
            board[inp-1] = current_player
        else:
            print("Oops, spot is either taken or out of range")

    except:
        print("Please enter an actual number")

# 3. check win (horizontal, vertical, diagonal)
def check_horizontal(board):
    global winner
    if board[0] == board[1] == board[2] and board[0] != "-":
        winner = board[0]
        return True
    elif board[3] == board[4] == board[5] and board[3] != "-":
        winner = board[3]
        return True
    elif board[6] == board[7] == board[8] and board[6] != "-":
        winner = board[6]
        return True

def check_vertical(board):
    global winner
    if board[0] == board[3] == board[6] and board[0] != "-":
        winner = board[0]
        return True
    elif board[1] == board[4] == board[7] and board[1] != "-":
        winner = board[1]
        return True
    elif board[2] == board[5] == board[8] and board[2] != "-":
        winner = board[2]
        return True

def check_diagonal(board):
    global winner
    if board[0] == board[4] == board[8] and board[0] != "-":
        winner = board[0]
        return True
    elif board[2] == board[4] == board[6] and board[2] != "-":
        winner = board[2]
        return True

# check winner function
def check_win():
    global game_running
    if check_diagonal(board) or check_horizontal(board) or check_vertical(board):
        print_board(board)
        print(f"The winner is {winner}")
        game_running = False

def check_tie(board):
    global game_running
    if "-" not in board:
        print_board(board)
        print("It's a tie")
        game_running = False

# 4. switch the player
def switch_player():
    global current_player
    if current_player == "X":
        current_player = "O"
    else:
        current_player = "X"

# main game loop
while game_running:
    print_board(board)
    take_player_input(board)
    check_win()
    check_tie(board)
    switch_player()