mestint/ora6/amoba.py

import random
from game_search_algorithms import alfabeta_search, minimax_search

# GAME BASE CLASS
class Game:
    def legal_steps(self, state: dict[str, any]):
        """Steps that can be made in given state."""
        raise NotImplementedError()

    def take_step(self, step, state):  # NOQA
        """Result of taking step in given state."""
        raise NotImplementedError

    def goodness(self, state, player):
        """Goodness measure of the state for the player."""
        raise NotImplementedError()

    def is_leaf(self, state):
        """Is the node a terminal node."""
        return not self.legal_steps(state)

    def next(self, state):
        """Return next player."""
        return state['next']

    def print(self, state):
        """Print current state."""
        print(state)

    def next_state(self, state):
        """Return next (step, state) list."""
        return [(step, self.take_step(step, state))
                for step in self.legal_steps(state)]

    def __repr__(self):
        """Print the name of the game."""
        return '<%s>' % self.__class__.__name__




        
class TicTacToe(Game):
    def __init__(self, h=3, v=3, k=3):
         #super().__init__()
         self.h = h
         self.v = v
         self.k = k
         
         steps = [(i,j) for i in range(1, h+1) for j in range(1, v+1)]
         print(steps)
         
         self.initial = {
             #ki kezd
             'next': 'X',
             'steps': steps,
             'result': 0,
             'board': dict()
         }
         
    def print(self, state):
        """Let's see the current state."""
        board = state['board']
        for x in range(1, self.h + 1):
            for y in range(1, self.v + 1):
                print(board.get((x, y), '.'), end=" ")
            print()
        print('Result of the game: ', state['result'])
        print()
         
    def legal_steps(self, state):
        return state['steps']
    
    def take_step(self, step, state):
        if step not in state['steps']:
            return state #ha galiba van ujra lephetunk (??????)
        
        board = state['board'].copy()
        board[step] = self.next(state) #adot pozba beirjuk a jatekost
        #modositjuk a lepeseket
        steps = state['steps'].copy()
        steps.remove(step) #ezzel nem tud foglalt helyre lepni
        
        return {
            'next': 'X' if state['next'] == 'O' else 'O',
            'steps': steps,
            'result': self.result(board, step, state['next']),
            'board': board
        }
        
    def result(self, board, step, player):
        if (self.check_triplets(board, step, player, (0,1)) or self.check_triplets(board, step, player, (1,0)) or
            self.check_triplets(board, step, player, (1,1)) or self.check_triplets(board, step, player, (1,-1))):
            if player == 'X':
                return 1
            else:
                return -1
        return 0
        
    def check_triplets(self, board, step, player, direction):
        n = -1
        dx, dy = direction
        
        x,y = step      
        while board.get((x,y)) == player:
            x,y = dx + x,dy + y
            n += 1
            
        x,y = step
        while board.get((x,y)) == player:
            x,y = x - dx,y - dy
            n += 1
            
        return n >= self.k
    
    def goodness(self, state, player):
        return state["result"] if player == 'X' else -state['result']
    
    def is_leaf(self, state):
        return state['steps'] == [] or state['result'] != 0 #elfogytak a lepesek vagy valaki nyert        
            
        
        
# PLAYERS
def random_player(game, state):
    """Randomly choose between options"""
    return random.choice(game.legal_steps(state))


def alfabeta_player(game, state):
    """Search in game tree"""
    return alfabeta_search(state, game)


def minimax_player(game, state):
    """Search in game tree"""
    return minimax_search(state, game)


def play_game(game, *players):
    state = game.initial
    game.print(state)
    while True:
        for player in players:
            step = player(game, state)
            state = game.take_step(step, state)
            game.print(state)
            if game.is_leaf(state):
                end_result = game.goodness(state, 'X')
                return "X wins" if end_result == 1 else "O wins" if end_result == -1 else "Draw"


tto = TicTacToe()

# Test if playing works
play_game(tto, random_player, random_player)

# Demonstrate the power of the search algorithms
# you can comment out the game.print(state) lines in the play_game function for this
for i in range(0):
    #print(play_game(tto, random_player, random_player))  # outcome will be random (starting player has the edge)
    #print(play_game(tto, alfabeta_player, random_player))  # X will always win
    print(play_game(tto, minimax_player, alfabeta_player))  # O will most likely win
    #print(play_game(tto, alfabeta_player, alfabeta_player)) # game will always end in draw
    #print(play_game(tto, alfabeta_player, minimax_player))