#Set MAX_CHIPS constant to 21
MAX_CHIPS = 21

#Set PlayerOneSscore to 0
playeronescore = 0

#Set PlayerTwoScore to 0
playertwoscore = 0

#Set chipsLeft to 0
chipsleft = 0

#Set chipsTaken to 0
chipstaken = 0

#Get playerOneName through user input
def names():
    global playerone
    global playertwo
    while True:
        playerone = str(input("Player one enter your name:"))
        if playerone.isalpha() == True:
            break
        else:
            print("This name is not a valid name, try again")
    #Get playerTwoName through user input
    while True:
        playertwo = str(input("Player two enter your name:"))
        if playertwo.isalpha() == True:
            game_main()
            break
        else:
            print("This name is not a valid name, try again")

#globals
def game_main():
    global chipsleft
    global MAX_CHIPS
    global chipstaken
    global rounds
    global playeronescore
    global playertwoscore
    #Get rounds through user input
    while True:
        try:
            rounds = int(input("How many rounds would you like to play? 1-5:"))
            if 1 <= rounds <= 5:
                break

            else:
                print("Please choose a number from 1 to 5")
        
        except:
            print("If you don't input a number I can't process what to do next, try again")

    while rounds > 0:
        #chipsLeft = MAX_CHIPS
        chipsleft = MAX_CHIPS
        

        #While chipsLeft is greater than zero
        while chipsleft > 0:

            while True:
                try:
                    #Get player1 chosen amount of chips to take
                    chipstaken = int(input(f"{playerone} how many chips would you like to take 1-3?"))
                    if chipstaken < 1 or chipstaken > 3:
                        print("You can only take 1 to 3 chips, try again")

                    else:
                        chipsleft -= chipstaken
                        break
                        
                except:
                    print("If you don't input a number I can't process what to do next, try agian")

            #If chipsLeft is lesser than one
            if chipsleft <= 0:
                print(f"\n {playerone} has won this round\n")
                #Add 1 to playerOneScore
                playeronescore += 1
                #Break from loop
                break
            
                #Output chipsLeft
            print("There is now", chipsleft,"chips left")
            while True:
                try:
                    #Get player2 chosen amount of chips to take
                    chipstaken = int(input(f"{playertwo} how many chips would you like to take 1-3?"))
                    if chipstaken < 1 or chipstaken >3:
                        print("You can only take 1 to 3 chips, try again")

                    else:
                        chipsleft -= chipstaken
                        break

                except:
                    print("If you don't input a number I can't process what to do next, try again")

            #If chipsLeft is lesser than one
            if chipsleft <= 0:
                print(f"\n {playertwo} haas won this round\n")
                #Add 1 to playerTwoScore
                playertwoscore += 1
                #Break from loop
                break
            
            #Update chipsLeft
            print("There is", chipsleft,"chips left")
        
        #Minus 1 from rounds
        rounds -= 1
    
    #Check who has the higher score and output the winner
    if rounds == 0:
        print(f"\n{playerone}'s score was", playeronescore,) 
        print(f"{playertwo}'s score was", playertwoscore,)       

if __name__ == "__main__":
    names()