#Project: 21 game
#Standard: 91883 (AS1.7) v.1
#School: Tauranga Boys' College
#Author: JINDPREET SINGH 
#Date: THE DATE YOU COMPLETED THE CODE
#Python: 3.7.4



def main():
    print("Welcome to the 21 game!")
    #asks for player names
    player1 = input("Enter the first player's name: ")
    player2 = input("Enter the second player's name: ")
    print("This is the 21 Game, during each turn you have to subtract 1-3 chips from the total amount of chips, which is 21.")
    rounds = int(input("How many rounds would you like to play? "))

    #player score counters
    player_scores = {player1: 0, player2: 0}
    
    #loop for the amount of rounds that the player has selected
    for round_number in range(1, rounds + 1):
        print(f"\nRound {round_number} begins!")

        MAX_CHIPS = 21
        print(f"The current amount of chips are {MAX_CHIPS} chips.")

        #gives the first player the first turn of the round
        current_player = player1
        while MAX_CHIPS> 0:
        
            print(f"\n{current_player}'s turn. You can choose to take 1, 2, or 3 chips.")
            #this loop prevents any strings from being entered into the code and prompts the user to enter a number from the choices before
            while True:
                try:
                    chips_taken = int(input("Chips taken: "))
                except ValueError:
                    print("Invalid input. Please enter a valid integer.")
                    continue
                        #prevents them from taking 0 chips or more than 3 or more than 21 chips
                if chips_taken < 1 or chips_taken > 3 or chips_taken > MAX_CHIPS:
                    print("Invalid input. Please pick 1, 2, or 3 chips.")
                    continue

                break
                #takes away the amount of chips the player has selected from the original amount of chips
            MAX_CHIPS -= chips_taken
            print(f"{MAX_CHIPS} chips remaining.")

            if MAX_CHIPS == 0:
                print(f"\n{current_player} wins this round!")
                player_scores[current_player] += 1
                break

            current_player = player2 if current_player == player1 else player1

    #prints the final scores after all rounds have ended
    print("\nGame over!")
    print("Final scores:")
    for player, score in player_scores.items():
        print(f"{player}: {score} point(s)")
        
        #prints the winnning players/scores of the game 
    if player_scores[player1] > player_scores[player2]:
        print(f"\n{player1} wins this game!")
    elif player_scores[player1] > player_scores[player2]:
        print(f"\n{player2} wins this game!")
    else:
        print("\nYou tied!")

if __name__ == "__main__":
    main()