#!/usr/bin/python
# -*- coding: utf-8 -*-

#Copyright 2009-2010 Grigorij Indigirkin
#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU Affero General Public License as published by
#the Free Software Foundation, version 3 of the License.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU Affero General Public License
#along with this program. If not, see <http://www.gnu.org/licenses/>.
#In the "official" distribution you can find the license in agpl-3.0.txt.

"""@package AlchemyMappings
This package contains all classes to be mapped and mappers themselves
"""

#TODO: gettextify if file is used again

import logging
import re
from decimal import Decimal
from sqlalchemy.orm import mapper, relation, reconstructor
from sqlalchemy.sql import select
from collections import defaultdict


from AlchemyTables import *
from AlchemyFacilities import get_or_create, MappedBase
from DerivedStats import DerivedStats
from Exceptions import IncompleteHandError, FpdbError


class Player(MappedBase):
    """Class reflecting Players db table"""

    @staticmethod
    def get_or_create(session, siteId, name):
        return get_or_create(Player, session, siteId=siteId, name=name)[0]

    def __str__(self):
        return '<Player "%s" on %s>' % (self.name, self.site and self.site.name)


class Gametype(MappedBase):
    """Class reflecting Gametypes db table"""

    @staticmethod
    def get_or_create(session, siteId, gametype):
        map = zip(
            ['type', 'base', 'category', 'limitType', 'smallBlind', 'bigBlind', 'smallBet', 'bigBet', 'currency'],
            ['type', 'base', 'category', 'limitType', 'sb', 'bb', 'dummy', 'dummy', 'currency'])
        gametype = dict([(new, gametype.get(old)) for new, old in map  ])

        hilo = "h"
        if gametype['category'] in ('studhilo', 'omahahilo'):
            hilo = "s"
        elif gametype['category'] in ('razz','27_3draw','badugi'):
            hilo = "l"
        gametype['hiLo'] = hilo

        for f in ['smallBlind', 'bigBlind', 'smallBet', 'bigBet']:
            if gametype[f] is None: 
                gametype[f] = 0
            gametype[f] = int(Decimal(gametype[f])*100)

        gametype['siteId'] = siteId
        return get_or_create(Gametype, session, **gametype)[0]


class HandActions(object):
    """Class reflecting HandsActions db table"""
    def initFromImportedHand(self, hand, actions):
        self.hand = hand
        self.actions = {}
        for street, street_actions in actions.iteritems():
            self.actions[street] = []
            for v in street_actions:
                hp = hand.handplayers_by_name[v[0]]
                self.actions[street].append({'street': street, 'pid': hp.id, 'seat': hp.seatNo, 'action':v})

    @property
    def flat_actions(self):
        actions = []
        for street in self.hand.allStreets:
            actions += self.actions[street]
        return actions



class HandInternal(DerivedStats):
    """Class reflecting Hands db table"""

    def parseImportedHandStep1(self, hand):
        """Extracts values to insert into from hand returned by HHC. No db is needed he"""
        hand.players = hand.getAlivePlayers() 

        # also save some data for step2. Those fields aren't in Hands table
        self.siteId = hand.siteId 
        self.gametype_dict = hand.gametype 

        self.attachHandPlayers(hand)
        self.attachActions(hand) 

        self.assembleHands(hand)
        self.assembleHandsPlayers(hand)

    def parseImportedHandStep2(self, session):
        """Fetching ids for gametypes and players"""
        gametype = Gametype.get_or_create(session, self.siteId, self.gametype_dict)
        self.gametypeId = gametype.id
        for hp in self.handPlayers:
            hp.playerId = Player.get_or_create(session, self.siteId, hp.name).id

    def getPlayerByName(self, name):
        if not hasattr(self, 'handplayers_by_name'):
            self.handplayers_by_name = {}
            for hp in self.handPlayers:
                pname = getattr(hp, 'name', None) or hp.player.name
                self.handplayers_by_name[pname] = hp
        return self.handplayers_by_name[name]

    def attachHandPlayers(self, hand):
        """Fill HandInternal.handPlayers list. Create self.handplayers_by_name"""
        hand.noSb = getattr(hand, 'noSb', None)
        if hand.noSb is None and self.gametype_dict['base']=='hold':
            saw_sb = False
            for action in hand.actions[hand.actionStreets[0]]: # blindsantes
                if action[1] == 'posts' and action[2] == 'small blind' and action[0] is not None:
                    saw_sb = True
            hand.noSb = saw_sb

        self.handplayers_by_name = {}
        for seat, name, chips in hand.players:
            p = HandPlayer(hand = self, imported_hand=hand, seatNo=seat, 
                           name=name, startCash=chips)         
            self.handplayers_by_name[name] = p
        
    def attachActions(self, hand):
        """Create HandActions object"""
        a = HandActions()
        a.initFromImportedHand(self, hand.actions)

    def parseImportedTournament(self, hand, session):
        """Fetching tourney, its type and players
        
        Must be called after Step2
        """
        if self.gametype_dict['type'] != 'tour': return

        # check for consistense
        for i in ('buyin', 'tourNo'):
            if not hasattr(hand, i):
                raise IncompleteHandError( 
                    "Field '%s' required for tournaments" % i, self.id, hand )

        # repair old-style buyin value
        m = re.match('\$(\d+)\+\$(\d+)', hand.buyin)
        if m is not None:
            hand.buyin, self.fee = m.groups()

        # fetch tourney type
        tour_type_hand2db = {
            'buyin':         'buyin',
            'fee':           'fee',
            'speed':         'speed',
            'maxSeats':      'maxseats',
            'knockout':      'isKO',
            'rebuy':         'isRebuy',
            'addOn':         'isAddOn',
            'shootout':      'isShootout',
            'matrix':        'isMatrix',
            'sng':           'isSNG',
        }
        tour_type_index = dict([
                    ( i_db, getattr(hand, i_hand, None) )
                    for i_db, i_hand in tour_type_hand2db.iteritems() 
                ])
        tour_type_index['siteId'] = self.siteId
        tour_type = TourneyType.get_or_create(session, **tour_type_index)

        # fetch and update tourney
        tour  = Tourney.get_or_create(session, hand.tourNo, tour_type.id)
        cols = tour.get_columns_names()
        for col in cols:
            hand_val = getattr(hand, col, None)
            if col in ('id', 'tourneyTypeId', 'comment', 'commentTs') or hand_val is None:
                continue
            db_val = getattr(tour, col, None)
            if db_val is None:
                setattr(tour, col, hand_val)
            elif col == 'koBounty':
                setattr(tour, col, max(db_val, hand_val))
            elif col == 'tourStartTime' and hand.startTime:
                setattr(tour, col, min(db_val, hand.startTime))

        if tour.entries is None and tour_type.sng:
            tour.entries = tour_type.maxSeats

        # fetch and update tourney players
        for hp in self.handPlayers:
            tp = TourneysPlayer.get_or_create(session, tour.id, hp.playerId)
            # FIXME: other TourneysPlayers should be added here

        session.flush()

    def isDuplicate(self, session):
        """Checks if current hand already exists in db
        
        siteHandNo ans gametypeId have to be setted
        """
        return session.query(HandInternal).filter_by(
                siteHandNo=self.siteHandNo, gametypeId=self.gametypeId).count()!=0

    def __str__(self):
        s = list()
        for i in self._sa_class_manager.mapper.c:
            s.append('%25s     %s' % (i, getattr(self, i.name)))

        s+=['', '']
        for i,p in enumerate(self.handPlayers):
            s.append('%d. %s' % (i, p.name or '???'))
            s.append(str(p))
        return '\n'.join(s)

    @property
    def boardcards(self):
        cards = []
        for i in range(5):
            cards.append(getattr(self, 'boardcard%d' % (i+1), None))
        return filter(bool, cards)

    @property
    def HandClass(self):
        """Return HoldemOmahaHand or something like this"""
        import Hand
        if self.gametype.base == 'hold':
            return Hand.HoldemOmahaHand
        elif self.gametype.base == 'draw':
            return Hand.DrawHand
        elif self.gametype.base == 'stud':
            return Hand.StudHand
        raise Exception("Unknow gametype.base: '%s'" % self.gametype.base)

    @property
    def allStreets(self):
        return self.HandClass.allStreets

    @property
    def actionStreets(self):
        return self.HandClass.actionStreets



class HandPlayer(MappedBase):
    """Class reflecting HandsPlayers db table"""
    def __init__(self, **kwargs):
        if 'imported_hand' in kwargs and 'seatNo' in kwargs:
            imported_hand = kwargs.pop('imported_hand')
            self.position = self.getPosition(imported_hand, kwargs['seatNo'])
        super(HandPlayer, self).__init__(**kwargs)

    @reconstructor
    def init_on_load(self):
        self.name = self.player.name

    @staticmethod
    def getPosition(hand, seat):
        """Returns position value like 'B', 'S', '0', '1', ...

        >>> class A(object): pass
        ... 
        >>> A.noSb = False
        >>> A.maxseats = 6
        >>> A.buttonpos = 2
        >>> A.gametype = {'base': 'hold'}
        >>> A.players = [(i, None, None) for i in (2, 4, 5, 6)]
        >>> HandPlayer.getPosition(A, 6) # cut off
        '1'
        >>> HandPlayer.getPosition(A, 2) # button
        '0'
        >>> HandPlayer.getPosition(A, 4) # SB
        'S'
        >>> HandPlayer.getPosition(A, 5) # BB
        'B'
        >>> A.noSb = True
        >>> HandPlayer.getPosition(A, 5) # MP3
        '2'
        >>> HandPlayer.getPosition(A, 6) # cut off
        '1'
        >>> HandPlayer.getPosition(A, 2) # button
        '0'
        >>> HandPlayer.getPosition(A, 4) # BB
        'B'
        """
        from itertools import chain
        if hand.gametype['base'] == 'stud':
            # FIXME: i've never played stud so plz check & del comment \\grindi
            bringin = None
            for action in chain(*[self.actions[street] for street in hand.allStreets]):
                if action[1]=='bringin':
                    bringin = action[0]
                    break
            if bringin is None:
                raise Exception, "Cannot find bringin"
            # name -> seat
            bringin = int(filter(lambda p: p[1]==bringin, bringin)[0])
            seat = (int(seat) - int(bringin))%int(hand.maxseats)
            return str(seat)
        else:
            seats_occupied = sorted([seat_ for seat_, name, chips in hand.players], key=int)
            if hand.buttonpos not in seats_occupied:
                # i.e. something like
                # Seat 3: PlayerX ($0), is sitting out
                # The button is in seat #3
                hand.buttonpos = max(seats_occupied, 
                                     key = lambda s: int(s) 
                                        if int(s) <= int(hand.buttonpos) 
                                        else int(s) - int(hand.maxseats)
                                    )
            seats_occupied = sorted(seats_occupied, 
                    key = lambda seat_: (
                        - seats_occupied.index(seat_) 
                        + seats_occupied.index(hand.buttonpos) 
                        + 2) % len(seats_occupied)
                    )
            # now (if SB presents) seats_occupied contains seats in order: BB, SB, BU, CO, MP3, ...
            if hand.noSb:
                # fix order in the case nosb
                seats_occupied = seats_occupied[1:] + seats_occupied[0:1]
                seats_occupied.insert(1, -1)
            seat = seats_occupied.index(seat)
            if seat == 0:
                return 'B'
            elif seat == 1:
                return 'S'
            else:
                return str(seat-2)

    @property
    def cards(self):
        cards = []
        for i in range(7):
            cards.append(getattr(self, 'card%d' % (i+1), None))
        return filter(bool, cards)

    def __str__(self):
        s = list()
        for i in self._sa_class_manager.mapper.c:
            s.append('%45s     %s' % (i, getattr(self, i.name)))
        return '\n'.join(s)


class Site(object):
    """Class reflecting Players db table"""
    INITIAL_DATA = [
            (1 , 'Full Tilt Poker','FT'),
            (2 , 'PokerStars',     'PS'),
            (3 , 'Everleaf',       'EV'),
            (4 , 'Win2day',        'W2'),
            (5 , 'OnGame',         'OG'),
            (6 , 'UltimateBet',    'UB'),
            (7 , 'Betfair',        'BF'),
            (8 , 'Absolute',       'AB'),
            (9 , 'PartyPoker',     'PP'),
            (10, 'Partouche',      'PA'),
            (11, 'Carbon',         'CA'),
            (12, 'PKR',            'PK'),
        ]
    INITIAL_DATA_KEYS = ('id', 'name', 'code')

    INITIAL_DATA_DICTS = [ dict(zip(INITIAL_DATA_KEYS, datum)) for datum in INITIAL_DATA ] 

    @classmethod
    def insert_initial(cls, connection):
        connection.execute(sites_table.insert(), cls.INITIAL_DATA_DICTS)


class Tourney(MappedBase):
    """Class reflecting Tourneys db table"""

    @classmethod
    def get_or_create(cls, session, siteTourneyNo, tourneyTypeId):
        """Fetch tourney by index or creates one if none.  """
        return get_or_create(cls, session, siteTourneyNo=siteTourneyNo, 
                                tourneyTypeId=tourneyTypeId)[0]
    


class TourneyType(MappedBase):
    """Class reflecting TourneyType db table"""

    @classmethod
    def get_or_create(cls, session, **kwargs):
        """Fetch tourney type by index or creates one if none

        Required kwargs: 
            buyin fee speed maxSeats knockout 
            rebuy addOn shootout matrix sng currency
        """
        return get_or_create(cls, session, **kwargs)[0]


class TourneysPlayer(MappedBase):
    """Class reflecting TourneysPlayers db table"""

    @classmethod
    def get_or_create(cls, session, tourneyId, playerId):
        """Fetch tourney player by index or creates one if none """
        return get_or_create(cls, session, tourneyId=tourneyId, playerId=playerId)


class Version(object):
    """Provides read/write access for version var"""
    CURRENT_VERSION = 120 # db version for current release
    # 119 - first alchemy version
    # 120 - add m_factor

    conn = None 
    ver  = None
    def __init__(self, connection=None):
        if self.__class__.conn is None:
            self.__class__.conn = connection

    @classmethod
    def is_wrong(cls):
        return cls.get() != cls.CURRENT_VERSION

    @classmethod
    def get(cls):
        if cls.ver is None:
            try:
                cls.ver = cls.conn.execute(select(['version'], settings_table)).fetchone()[0]
            except:
                return None
        return cls.ver

    @classmethod
    def set(cls, value):
        if cls.conn.execute(settings_table.select()).rowcount==0:
            cls.conn.execute(settings_table.insert(), version=value)
        else:
            cls.conn.execute(settings_table.update().values(version=value))
        cls.ver = value
    
    @classmethod
    def set_initial(cls):
        cls.set(cls.CURRENT_VERSION)


mapper (Gametype, gametypes_table, properties={
    'hands': relation(HandInternal, backref='gametype'),
})
mapper (Player, players_table, properties={
    'playerHands': relation(HandPlayer, backref='player'),
    'playerTourney': relation(TourneysPlayer, backref='player'),
})
mapper (Site, sites_table, properties={
    'gametypes': relation(Gametype, backref = 'site'),
    'players': relation(Player, backref = 'site'),
    'tourneyTypes': relation(TourneyType, backref = 'site'),
})
mapper (HandActions, hands_actions_table, properties={})
mapper (HandInternal, hands_table, properties={
    'handPlayers': relation(HandPlayer, backref='hand'),
    'actions_all':     relation(HandActions, backref='hand', uselist=False),
})
mapper (HandPlayer, hands_players_table, properties={})

mapper (Tourney, tourneys_table) 
mapper (TourneyType, tourney_types_table, properties={
    'tourneys': relation(Tourney, backref='type'),
})
mapper (TourneysPlayer, tourneys_players_table) 

class LambdaKeyDict(defaultdict):
    """Operates like defaultdict but passes key argument to the factory function"""
    def __missing__(key):
        return self.default_factory(key)