import random

class RPSGame:
    def __init__(self, best_of = 3):
        self.deck = self.build_deck()
        self.user_score = 0
        self.ai_score = 0
        self.rounds_to_win = (best_of // 2) + 1

    def build_deck(self):
        cards = [self.rock, self.paper, self.scissors]
        deck = []

        random.shuffle(cards)
        for i in range(2):
            n = random.randint(5, 20)
            deck = cards[i](deck, n)

        missing_cards = 52 - len(deck)
        deck = cards[2](deck, missing_cards)
        random.shuffle(deck)
        return deck

    def rock(self, lst, n):
        lst.extend(["Rock"] * n)
        return lst

    def paper(self, lst, n):
        lst.extend(["Paper"] * n)
        return lst

    def scissors(self, lst, n):
        lst.extend(["Scissors"] * n)
        return lst

    def give_cards(self):
        return [self.deck.pop(0) for _ in range(3)], [self.deck.pop(0) for _ in range(3)]

    def battle(self, user_card, ai_card):
        if user_card == ai_card:
            return 0
        if (user_card == "Rock" and ai_card == "Scissors") or \
           (user_card == "Paper" and ai_card == "Rock") or \
           (user_card == "Scissors" and ai_card == "Paper"):
            return 1
        return -1

    def play_cards(self, user_hand, ai_hand):
        while user_hand and ai_hand:
            print(f"\nYour cards: {user_hand}")

            while True:
                try:
                    user_choice = int(input(f"Select a card (1-{len(user_hand)}): ")) - 1
                    if 0 <= user_choice < len(user_hand):
                        break
                except ValueError:
                    pass
                print("Invalid choice. Try again.")

            user_card = user_hand.pop(user_choice)
            ai_card = ai_hand.pop(random.randint(0, len(ai_hand) - 1))

            print(f"You played: {user_card}, AI played: {ai_card}")

            result = self.battle(user_card, ai_card)
            if result == 1:
                print("You win this round!")
                return 1
            elif result == -1:
                print("AI wins this round!")
                return -1
            else:
                print("It's a tie! Play again with remaining cards.")

        print("No cards left, this round is a draw.")
        return 0

    def play_game(self):
        while self.user_score < self.rounds_to_win and self.ai_score < self.rounds_to_win and len(self.deck) >= 6:
            user_hand, ai_hand = self.give_cards()
            round_result = self.play_cards(user_hand, ai_hand)

            if round_result == 1:
                self.user_score += 1
            elif round_result == -1:
                self.ai_score += 1

            print(f"Score - You: {self.user_score}, AI: {self.ai_score}")

        if self.user_score > self.ai_score:
            print("\n🎉 You won the match!")
        else:
            print("\n🤖 AI won the match!")

if __name__ == "__main__":
    game = RPSGame(best_of = 3)
    game.play_game()