tic_tac_toe

import random
board = ["-", "-", "-",
         "-", "-", "-",
         "-", "-", "-"]

currentPlayer = "X"
winner = None
gameRunning = True

# print the game board
def printBoard(board):
    print(board[0] + " | " + board[1] + " | " + board[2])
    print("----------")
    print(board[3] + " | " + board[4] + " | " + board[5])
    print("----------")
    print(board[6] + " | " + board[7] + " | " + board[8])


# take player input
def playerInput(board):
    inp = int(input("Enter a number 1-9: "))
    if 1 <= inp <= 9 and board[inp-1] == "-":
        board[inp-1] = currentPlayer
    else:
        print("Oops player is already in that spot or index os out of range!")
        while True:
            inp = int(input("Enter a number 1-9: "))
            if 1 <= inp <= 9 and board[inp - 1] == "-":
                board[inp - 1] = currentPlayer
                break
            else:
                print("Oops player is already in that spot or index is out of range!")


# check for win ot tie
def checkHorizontle(board):
    global winner
    if board[0] == board[1] == board[2] and board[1] != "-":
        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 checkRow(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[3]
        return True
    elif board[2] == board[5] == board[8] and board[2] != "-":
        winner = board[7]
        return True


def checkDiag(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

def checkTie(board):
    global gameRunning
    if "-" not in board:
        printBoard(board)
        print("It is tie!")
        gameRunning = False


def checkWin(board):
    if checkDiag(board) or checkHorizontle(board) or checkRow(board):
        printBoard(board)
        print(f"The winner is {winner}")
        global gameRunning
        gameRunning = False


# computer
def computer(board):
    while currentPlayer == "0":
        position = random.randint(0, 8)
        if board[position] == "-":
            board[position] = "0"
            switchPlayer()


# switch the player
def switchPlayer():
    global currentPlayer
    if currentPlayer == "X":
        currentPlayer = "0"
    else:
        currentPlayer = "X"


# check for win ot tie again
while gameRunning:
    printBoard(board)
    playerInput(board)
    checkWin(board)
    checkTie(board)
    if not gameRunning:
        break
    switchPlayer()
    computer(board)
    checkWin(board)
    checkTie(board)
    if not gameRunning:
        break