140 lines
5.4 KiB
Python
140 lines
5.4 KiB
Python
"""
|
||
Hand evaluator module for poker game
|
||
"""
|
||
|
||
from typing import List, Tuple, Dict
|
||
from collections import Counter
|
||
from itertools import combinations
|
||
from .card import Card, Rank, Suit
|
||
from .hand_ranking import HandRanking, HandType
|
||
|
||
|
||
class HandEvaluator:
|
||
"""
|
||
手牌评估器类，用于评估扑克手牌
|
||
"""
|
||
|
||
@staticmethod
|
||
def evaluate_hand(cards: List[Card]) -> HandRanking:
|
||
"""
|
||
从7张牌中评估出最好的5张牌组合
|
||
"""
|
||
if len(cards) != 7:
|
||
raise ValueError(f"Expected 7 cards, got {len(cards)}")
|
||
|
||
best_ranking = None
|
||
best_cards = None
|
||
|
||
# 尝试所有可能的5张牌组合
|
||
for five_cards in combinations(cards, 5):
|
||
ranking = HandEvaluator._evaluate_five_cards(list(five_cards))
|
||
|
||
if best_ranking is None or ranking > best_ranking:
|
||
best_ranking = ranking
|
||
best_cards = list(five_cards)
|
||
|
||
# 更新最佳ranking的cards
|
||
best_ranking.cards = best_cards
|
||
return best_ranking
|
||
|
||
@staticmethod
|
||
def _evaluate_five_cards(cards: List[Card]) -> HandRanking:
|
||
"""
|
||
评估5张牌的手牌类型
|
||
"""
|
||
if len(cards) != 5:
|
||
raise ValueError(f"Expected 5 cards, got {len(cards)}")
|
||
|
||
# 按点数排序（降序）
|
||
sorted_cards = sorted(cards, key=lambda c: c.rank.numeric_value, reverse=True)
|
||
ranks = [card.rank for card in sorted_cards]
|
||
suits = [card.suit for card in sorted_cards]
|
||
|
||
# 统计点数出现次数
|
||
rank_counts = Counter(ranks)
|
||
count_values = sorted(rank_counts.values(), reverse=True)
|
||
|
||
# 检查是否是同花
|
||
is_flush = len(set(suits)) == 1
|
||
|
||
# 检查是否是顺子
|
||
is_straight, straight_high = HandEvaluator._is_straight(ranks)
|
||
|
||
# 根据牌型返回相应的HandRanking
|
||
if is_straight and is_flush:
|
||
if straight_high == Rank.ACE and ranks == [Rank.ACE, Rank.KING, Rank.QUEEN, Rank.JACK, Rank.TEN]:
|
||
return HandRanking(HandType.ROYAL_FLUSH, [Rank.ACE], sorted_cards)
|
||
else:
|
||
return HandRanking(HandType.STRAIGHT_FLUSH, [straight_high], sorted_cards)
|
||
|
||
elif count_values == [4, 1]: # 四条
|
||
quad_rank = [rank for rank, count in rank_counts.items() if count == 4][0]
|
||
kicker = [rank for rank, count in rank_counts.items() if count == 1][0]
|
||
return HandRanking(HandType.FOUR_OF_A_KIND, [quad_rank, kicker], sorted_cards)
|
||
|
||
elif count_values == [3, 2]: # 三条加一对
|
||
trips_rank = [rank for rank, count in rank_counts.items() if count == 3][0]
|
||
pair_rank = [rank for rank, count in rank_counts.items() if count == 2][0]
|
||
return HandRanking(HandType.FULL_HOUSE, [trips_rank, pair_rank], sorted_cards)
|
||
|
||
elif is_flush: # 同花
|
||
return HandRanking(HandType.FLUSH, ranks, sorted_cards)
|
||
|
||
elif is_straight: # 顺子
|
||
return HandRanking(HandType.STRAIGHT, [straight_high], sorted_cards)
|
||
|
||
elif count_values == [3, 1, 1]: # 三条
|
||
trips_rank = [rank for rank, count in rank_counts.items() if count == 3][0]
|
||
kickers = sorted([rank for rank, count in rank_counts.items() if count == 1], reverse=True)
|
||
return HandRanking(HandType.THREE_OF_A_KIND, [trips_rank] + kickers, sorted_cards)
|
||
|
||
elif count_values == [2, 2, 1]: # 两对
|
||
pairs = sorted([rank for rank, count in rank_counts.items() if count == 2], reverse=True)
|
||
kicker = [rank for rank, count in rank_counts.items() if count == 1][0]
|
||
return HandRanking(HandType.TWO_PAIR, pairs + [kicker], sorted_cards)
|
||
|
||
elif count_values == [2, 1, 1, 1]: # 一对
|
||
pair_rank = [rank for rank, count in rank_counts.items() if count == 2][0]
|
||
kickers = sorted([rank for rank, count in rank_counts.items() if count == 1], reverse=True)
|
||
return HandRanking(HandType.ONE_PAIR, [pair_rank] + kickers, sorted_cards)
|
||
|
||
else: # 高牌
|
||
return HandRanking(HandType.HIGH_CARD, ranks, sorted_cards)
|
||
|
||
@staticmethod
|
||
def _is_straight(ranks: List[Rank]) -> Tuple[bool, Rank]:
|
||
"""
|
||
检查是否是顺子，返回(是否是顺子, 最高牌)
|
||
"""
|
||
# 排序点数值
|
||
values = sorted([rank.numeric_value for rank in ranks], reverse=True)
|
||
|
||
# 检查常规顺子
|
||
is_regular_straight = True
|
||
for i in range(1, len(values)):
|
||
if values[i-1] - values[i] != 1:
|
||
is_regular_straight = False
|
||
break
|
||
|
||
if is_regular_straight:
|
||
# 返回最高牌
|
||
highest_rank = None
|
||
for rank in ranks:
|
||
if rank.numeric_value == values[0]:
|
||
highest_rank = rank
|
||
break
|
||
return True, highest_rank
|
||
|
||
# 检查A-2-3-4-5的特殊顺子（轮子）
|
||
if values == [14, 5, 4, 3, 2]: # A, 5, 4, 3, 2
|
||
return True, Rank.FIVE # 在轮子中，5是最高牌
|
||
|
||
return False, None
|
||
|
||
@staticmethod
|
||
def evaluate_from_input(cards_str: str) -> HandRanking:
|
||
"""
|
||
从字符串评估手牌，例如 "AsKs AhAdAc6s7s"
|
||
"""
|
||
cards = Card.parse_cards(cards_str)
|
||
return HandEvaluator.evaluate_hand(cards) |