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import functools
from .BCalcWrapper import BCalcWrapper as bcw
from .Exceptions import ParScoreInvalidException
class ParContract(object):
def __init__(self, level=0, denom='', declarer='', doubled=False, score=0):
self.level = level
self.denomination = denom
self.declarer = declarer
self.doubled = doubled
self.score = score
def validate(self):
if self.score == 0:
return self
if (self.level < 1) or (self.level > 7):
raise ParScoreInvalidException(
'Invalid par contract level: %d' % (self.level))
if self.denomination not in 'CDHSN':
raise ParScoreInvalidException(
'Invalid par contract denomination: ' + self.denomination)
if self.declarer not in 'NESW':
raise ParScoreInvalidException(
'Invalid par contract declarer: ' + self.declarer)
return self
def __repr__(self):
if self.score == 0:
return 'PASS'
return '%d%s%s %s %+d' % (
self.level,
self.denomination,
'x' if self.doubled else '',
self.declarer,
self.score)
def __eq__(self, other):
return hash(self) == hash(other)
def __hash__(self):
return self.score + self.level + 10000 * (
ord(self.denomination[0]) if self.denomination else 0)
def calculate_score(self, tricks, vulnerable=False):
if self.level == 0:
return 0
score = 0
if self.level + 6 > tricks:
undertricks = self.level + 6 - tricks
if self.doubled:
while True:
if undertricks == 1:
# first undertrick: 100 non-vul, 200 vul
score -= 200 if vulnerable else 100
else:
if (undertricks <= 3) and not vulnerable:
# second non-vul undertrick: 200
score -= 200
else:
# further undertricks: 300
score -= 300
undertricks -= 1
if undertricks == 0:
break;
else:
score = -100 if vulnerable else -50
score *= undertricks
else:
par_tricks = self.level
while True:
if (self.denomination == 'N') and (par_tricks == 1):
# first non-trump trick: 40
score += 40
else:
# other tricks
score += 30 if self.denomination in 'NSH' else 20
par_tricks -= 1
if par_tricks == 0:
break
overtricks = tricks - self.level - 6
if self.doubled:
score *= 2
score += 50
# game premium
score += (500 if vulnerable else 300) if (score >= 100) else 50
if self.doubled:
score += overtricks * (200 if vulnerable else 100)
else:
score += overtricks * (20 if self.denomination in 'CD' else 30)
if self.level == 7:
# grand slam premium
score += 1500 if vulnerable else 1000
elif self.level == 6:
# small slam premium
score += 750 if vulnerable else 500
if self.declarer in 'EW':
score = -score
return score
def __gt__(self, other):
denomination = bcw.DENOMINATIONS.index(self.denomination) \
if self.denomination in bcw.DENOMINATIONS \
else -1
other_denomination = bcw.DENOMINATIONS.index(
other.denomination) \
if other.denomination in bcw.DENOMINATIONS else -1
return (self.level > other.level) \
or ((self.level == other.level) \
and (denomination > other_denomination))
def get_defense(self, dd_table, vulnerable):
declarer_index = bcw.PLAYERS.index(self.declarer) \
if self.declarer in bcw.PLAYERS else -1
denomination_index = bcw.DENOMINATIONS.index(self.denomination) \
if self.denomination in bcw.DENOMINATIONS else -1
if (self.level != 0) \
and (self.level + 6
<= dd_table[declarer_index][denomination_index]):
defenders_indexes = []
defenders_indexes.append((declarer_index + 1) % 4);
defenders_indexes.append((declarer_index + 3) % 4);
possible_defense = []
score_squared = self.score * self.score
for i in range(0, 5):
level = self.level
if i <= denomination_index:
level += 1
if level <= 7:
for defender in defenders_indexes:
if level + 6 > dd_table[defender][i]:
defense = ParContract(
level,
bcw.DENOMINATIONS[i],
bcw.PLAYERS[defender],
True,
0)
defense.score = defense.calculate_score(
dd_table[defender][i],
vulnerable)
if score_squared > self.score * defense.score:
possible_defense.append(defense)
if possible_defense:
possible_defense.sort(
key=lambda x: abs(x.score - self.score))
optimum_defense = possible_defense[-1]
possible_defense = [defense for defense in possible_defense
if defense.score == optimum_defense.score]
for defense in possible_defense:
# Lowest from the most profitable sacrifices
if optimum_defense > defense:
optimum_defense = defense
return optimum_defense
return None
|
