import copy
import random
import cards
from observable import Observable

class Game:
    def __init__(self):
        self.players = []

class Mana:
    types = {
        'W': 'White',
        'U': 'Blue',
        'B': 'Black',
        'R': 'Red',
        'G': 'Green',
    }
    def __init__(self, mana=None):
        self.mana = {}
        for type in Mana.types.keys():
            self.mana[type] = 0
        if mana:
            # Can't just set self to result... ?
            result = self + mana
            self.mana = result.mana
    def __add__(self, other):
        result = Mana()
        if isinstance(other, str):
            for m in [c for c in other.upper() if c in Mana.types.keys()]:
                result.mana[m] = result.mana[m] + 1
        elif isinstance(other,Mana):
            for (key, value) in other.mana.iteritems():
                result.mana[key] = self.mana[key] + value
        else:
            # TODO: raise exception
            raise Exception()
            pass
        return result
    def __sub__(self, other):
        result = Mana()
        if isinstance(other, Mana):
            for (key, value) in other.mana.iteritems():
                result.mana[key] = self.mana[key] - value
                if result.mana[key] < 0:
                    raise Exception('Insufficient {0} Mana'.format(Mana.types[key]))
        elif isinstance(other,ManaCost):
            for (key, value) in other.mana.mana.iteritems():
                result.mana[key] = self.mana[key] - value
                if result.mana[key] < 0:
                    raise Exception('Insufficient {0} Mana'.format(Mana.types[key]))
            remaining = other.any
            for (key, value) in result.mana.iteritems():
                while result.mana[key] > 0 and remaining > 0:
                    result.mana[key] = result.mana[key] - 1
                    remaining = remaining - 1
            if remaining > 0:
                raise Exception('Insufficient Mana')
        return result
    def __repr__(self):
        return ''.join([type * count for (type, count) in self.mana.iteritems()]) if self.converted() > 0 else '0'
    def converted(self):
        return sum(self.mana.values())

class ManaCost:
    def __init__(self, cost=None):
        self.any = 0
        self.mana = Mana()
        if cost:
            result = self + cost
            self.any = result.any
            self.mana = result.mana
    def __add__(self, other):
        result = ManaCost()
        if isinstance(other, str):
            result.mana = Mana(other)
            value = ''
            for c in other:
                if c not in '0123456789': break
                value = value + c
            value = int(value) if len(value) > 0 else 0
            result.any = value
        elif isinstance(other, Mana):
            result.mana = other
        elif isinstance(other, ManaCost):
            result.any = other.many
            result.mana = other.many
        return result
    def __sub__(self, other):
        if isinstance(other, ManaCost):
            result.any = self.any - right.any
            result.mana = self.mana - right.mana
    def __repr__(self):
        return '{0}{1}'.format(
            self.any if self.any > 0 or self.mana.converted() == 0 else '',
            self.mana if self.mana.converted() > 0 else ''
        )
    def converted(self):
        return self.mana.converted() + self.any

class Player:
    def __init__(self, name, deck=None):
        self.name = name
        self.deck = None
        self.setDeck(deck)
        self.hand = CardList()
        self.graveyard = CardList()
        self.battlefield = CardList()
    def __repr__(self):
        return 'Player: {0} [Deck:{1}]'.format(self.name, len(self.deck))
    def setDeck(self, deck):
        if not deck:
            return
        self.deck = copy.copy(deck)
        for card in deck:
            card.owner = self
    def draw(self):
        card = self.deck.pop()
        self.hand.append(card)
        card.moved.emit('deck', 'hand')
    def cast(self, card):
        hand.remove(card)
        self.battlefield.append(card)
        card.moved.emit('hand', 'battlefield')

class Card:
    def __init__(self, name, attributes, cost, power, toughness, owner=None):
        self.name = name 
        self.attributes = [a.lower() for a in attributes]
        self.cost = cost
        self.power = power
        self.toughness = toughness

        self.owner = owner

        # Events
        self.moved = Observable()
        self.tapped = Observable()
        self.attacked = Observable()

        self.store()
    def __repr__(self):
        return 'Card: [{2}] {0}: {1} [{3}/{4}]'.format(self.name, ' '.join([a.capitalize() for a in self.attributes]), self.cost, self.power, self.toughness)
    def store(self):
        self.__stored = copy.copy(self)
    def restore(self):
        self = copy.copy(self.__stored)
    def tap(self):
        self.tapped.emit()

class Ability:
    def __init__(self, target):
        self.target = target
        self.init()
    def init(self):
        pass

class CardList(list):
    def __init__(self, game):
        list.__init__(self)
        self.game = game
    def append(self, item):
        item.list = self
        list.append(self, item)

class Deck(CardList):
    def __init__(self):
        pass
    def shuffle(self):
        random.shuffle(self)
    def cards(self):
        return self.__cards