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state.py
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state.py
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from cards import Cards
from collections import Counter
from actions import Action
from exceptions import IllegalActionException
from typing import List, Tuple, Set, Optional
import typing
from random import randrange
class PlayerState(object):
def __init__(self, num_players:int, index:int, scores:List[int], discards:List[List[Cards]], known:List[Tuple[int,Cards]], eliminated:Set[int]):
self.num_players = num_players
self.index = index
self.scores = scores
self.discards = discards
self.known = known
self.eliminated = eliminated
self.hand = None
for i in range(len(known)):
if known[i][0] == self.index:
self.hand = known[i][1]
if self.hand == None:
raise ValueError('known did not contain hand of player %d' % index)
def legal_action(self, action:Action, drawn:Cards) ->bool:
if action is None:
return False
try:
if self.hand != action.card and drawn != action.card:
raise IllegalActionException('Player does not hold the played card')
if (self.hand == Cards.COUNTESS or drawn == Cards.COUNTESS) and (action.card == Cards.KING or action.card == Cards.PRINCE):
raise IllegalActionException('Player must play the countess')
if action.target != -1:
if action.target in self.eliminated:
raise IllegalActionException('Target is already eliminated')
if action.target == self.index and action.card == Cards.PRINCE:
pass
elif self.handmaid(action.target) and ((not self.all_handmaid(action.player)) or action.card == Cards.PRINCE):
raise IllegalActionException('Target is protected by the handmaid')
except IllegalActionException as e:
print(e)
return False
return True
def handmaid(self, player:int) ->bool:
if (not 0 <= player < self.num_players) or len(self.discards[player]) == 0:
return False
return self.discards[player][-1] == Cards.HANDMAID
def all_handmaid(self, player:int) ->bool:
rv = True
for i in range(self.num_players):
rv = rv and (i in self.eliminated or self.handmaid(i) or i == player)
return rv
def unseen_cards(self) ->List[Cards]:
counter: typing.Counter[Cards] = Counter()
for i in range(self.num_players):
for card in self.discards[i]:
counter[card] += 1
for i in range(len(self.known)):
counter[self.known[i][1]] += 1
rv = []
for card in Cards:
for _ in range(counter[card], card.value[2]):
rv.append(card)
return rv
class GameState(object):
def __init__(self, num_players: int):
if not(2 <= num_players <= 4):
raise ValueError('Number of agents out of range')
self.num_players = num_players
self.scores = [0 for _ in range(self.num_players)]
self.new_round()
self.next_player = 0
def __str__(self):
return 'GameState: {{num_players: {0}, next_player: {1}, scores: {2}}}'.format(self.num_players, self.next_player, self.scores)
def __repr__(self):
return self.__str__()
def new_round(self):
self.new_deck()
self.deck_top = 0
self.discards = [[] for _ in range(self.num_players)]
self.hand = []
self.known = [[False for _ in range(self.num_players)] for _ in range(self.num_players)]
for i in range(self.num_players):
self.hand.append(self.deck[self.deck_top])
self.deck_top += 1
self.known[i][i] = True
def new_deck(self):
self.deck = []
for card in Cards:
for _ in range(card.value[2]):
self.deck.append(card)
for _ in range(200):
i1 = randrange(len(self.deck))
i2 = randrange(len(self.deck))
card_buf = self.deck[i1]
self.deck[i1] = self.deck[i2]
self.deck[i2] = card_buf
def get_player_state(self, player_index:int) ->Optional[PlayerState]:
if not (0 <= player_index < self.num_players):
raise ValueError('index out of range')
if(self.hand[player_index] == None):
return None
known = []
for i in range(len(self.known[player_index])):
if self.known[player_index][i]:
known.append((i, self.hand[i]))
eliminated = set()
for i in range(self.num_players):
if self.hand[i] == None:
eliminated.add(i)
return PlayerState(self.num_players, player_index, self.scores, self.discards, known, eliminated)
def legal_action(self, action:Action, drawn:Cards) ->bool:
if action is None:
return False
try:
if self.hand[action.player] != action.card and drawn != action.card:
raise IllegalActionException('Player does not hold the played card')
if self.next_player != action.player:
raise IllegalActionException('Wrong player in action')
if (self.hand[action.player] == Cards.COUNTESS or drawn == Cards.COUNTESS) and (action.card == Cards.KING or action.card == Cards.PRINCE):
raise IllegalActionException('Player must play the countess')
if(action.target != -1):
if self.hand[action.target] == None:
raise IllegalActionException('Target is already eliminated')
if self.handmaid(action.target) and ((not self.all_handmaid(action.player)) or action.card == Cards.PRINCE):
raise IllegalActionException('Target is protected by the handmaid')
except IllegalActionException as e:
print(e)
return False
return True
def handmaid(self, player:int) ->bool:
if (not 0 <= player < self.num_players) or len(self.discards[player]) == 0:
return False
return self.discards[player][-1] == Cards.HANDMAID
def all_handmaid(self, player:int) ->bool:
rv = True
for i in range(self.num_players):
rv = rv and (self.hand[i] is None or self.handmaid(i) or i == player)
return rv
def draw_card(self):
rv = self.deck[self.deck_top]
self.deck_top += 1
return rv
def update(self, action:Action, card:Cards):
self.discards[action.player].append(action.card)
try:
self.legal_action(action, card)
except IllegalActionException as e:
#undo action
self.discards[action.player].pop()
raise e
if action.card == self.hand[action.player]:
self.hand[action.player] = card
for i in range(self.num_players):
if(i != action.player):
self.known[i][action.player] = False
if action.card == Cards.GUARD:
self.guard_action(action)
elif action.card == Cards.PRIEST:
self.priest_action(action)
elif action.card == Cards.BARON:
self.baron_action(action)
elif action.card == Cards.HANDMAID:
pass
elif action.card == Cards.PRINCE:
self.prince_action(action)
elif action.card == Cards.KING:
self.king_action(action)
elif action.card == Cards.COUNTESS:
pass
elif action.card == Cards.PRINCESS:
self.princess_action(action)
else:
raise IllegalActionException('Illegal Action? Something\'s gone very wrong')
if(self.round_over()):
for i in range(self.num_players):
for j in range(self.num_players):
self.known[i][j] = True
winner = self.round_winner()
self.scores[winner] += 1
self.next_player = winner
else:
self.next_player = (self.next_player + 1) % self.num_players
while (self.hand[self.next_player] is None):
self.next_player = (self.next_player + 1) % self.num_players
def guard_action(self, action:Action):
if(self.all_handmaid(action.player)):
print('Player %d is protected by the handmaid' % action.target)
return
elif(action.guess == self.hand[action.target]):
self.discards[action.target].append(self.hand[action.target])
self.hand[action.target] = None
for p in range(self.num_players):
self.known[p][action.target] = True
print('Player %d had the %s and is eliminated from the round' %(action.target, action.card.value[1]))
return
print('Player %d does not have the %s' %(action.target, action.card.value[1]))
def priest_action(self, action:Action):
if(self.all_handmaid(action.player)):
print('Player %d is protected by the handmaid' % action.target)
else:
self.known[action.player][action.target] =True
print('Player %d sees player %d\'s card' % (action.player, action.target))
def baron_action(self, action:Action):
if(self.all_handmaid(action.player)):
print('Player %d is protected by the handmaid' % action.target)
elim = -1
if(self.hand[action.player].value[0] > self.hand[action.target].value[0]):
elim = action.target
elif(self.hand[action.player].value[0] > self.hand[action.target].value[0]):
elim = action.player
if elim != -1:
self.discards[elim].append(self.hand[elim])
self.hand[elim] = None
for p in range(self.num_players):
self.known[p][elim] = True
print('Player %d holds the lesser card: %s and is eliminated' % (elim, self.discards[elim][-1].value[1]))
else:
self.known[action.player][action.target] = True
self.known[action.target][action.player] = True
print('Both players hold the same card, and neither is eliminated')
def prince_action(self, action:Action):
self.discards[action.target].append(self.hand[action.target])
if(self.hand[action.target] == Cards.PRINCESS):
self.hand[action.target] = None
for p in range(self.num_players):
self.known[p][action.target] = True
print('Player %d discarded the princess and is eliminated' % action.target)
else:
self.hand[action.target] = self.deck[self.deck_top]
self.deck_top += 1
for p in range(self.num_players):
self.known[p][action.target] = True
print('Player %d discards the %s' % (action.target, self.discards[action.target][-1].value[1]))
def king_action(self, action:Action):
if(self.all_handmaid(action.player)):
print('Player %d is protected by the handmaid' % action.target)
self.known[action.player][action.target] = True
self.known[action.target][action.player] = True
card_buf = self.hand[action.player]
self.hand[action.player] = self.hand[action.target]
self.hand[action.target] = card_buf
print('Player %d and player %d swap cards' %(action.player, action.target))
def princess_action(self, action:Action):
self.hand[action.player] = None
for p in range(self.num_players):
self.known[p][action.player] = True
print('Player %d played the princess and is eliminated' % (action.player))
def round_over(self) ->bool:
remaining = 0
for i in range(self.num_players):
if self.hand[i] is not None:
remaining += 1
return remaining == 1 or (len(self.deck) - self.deck_top < 2)
def round_winner(self):
winner = 1
top_card = -1
discard_val = -1
for i in range(self.num_players):
if(self.hand[i] is not None):
dv = 0
for j in range(len(self.discards[i])):
dv += self.discards[i][j].value[0]
if(self.hand[i].value[0] > top_card or (self.hand[i].value[0] == top_card and dv > discard_val)):
winner = i
top_card = self.hand[i].value[0]
discard_val = dv
return winner
def game_over(self) ->bool:
return self.game_winner() != -1
def game_winner(self) ->int:
threshold = 0
if(self.num_players == 4):
threshold = 4
elif(self.num_players == 3):
threshold = 5
elif(self.num_players == 2):
threshold = 7
for i in range(self.num_players):
if(self.scores[i] == threshold):
return i
return -1