naja/gameboard.py

   1 from random import choice
   2
   3 from naja.constants import(
   4     BITS, DIRECTION_BITS, CONDITION_BITS, PLAYER_DEFAULTS,
   5     ACT, EXAMINE, ROTATION)
   6 from naja.options import options
   7 from naja.player import Player
   8 from naja import actions
   9 from naja.sound import sound
  10 import random
  11
  12
  13 class GameBoard(object):
  14     """
  15     A representation of the game board.
  16     """
  17
  18     def __init__(self, state, player, board_locations):
  19         self.max_health = state['max_health']
  20         self.wins_required = state['wins_required']
  21         self.health = state['health']
  22         self.wins = state['wins']
  23         self.locations = [item.copy() for item in state['locations']]
  24         self.puzzle = state.get('puzzle', False)
  25         self.player = player
  26         self.board_locations = board_locations
  27         self.player_mode = state.get('player_mode', EXAMINE)
  28         self.has_cheated = state.get('cheater', options.cheat_enabled)
  29         self.clock_count = state.get('clock_count', 0)
  30         self.replacement_params = state.get('replacement_params', None)
  31
  32     @classmethod
  33     def new_game(cls, deck,
  34                  initial_bits=PLAYER_DEFAULTS.INITIAL_BITS,
  35                  initial_pos=PLAYER_DEFAULTS.INITIAL_POS,
  36                  max_health=PLAYER_DEFAULTS.MAX_HEALTH,
  37                  wins_required=PLAYER_DEFAULTS.WINS_REQUIRED):
  38         if options.initial_bits:
  39             initial_bits = options.initial_bits
  40         state = {
  41             'max_health': max_health,
  42             'health': max_health,
  43             'wins_required': wins_required,
  44             'wins': 0,
  45             'locations': deck['cards'],
  46             'puzzle': deck.get('puzzle', False),
  47             'clock_count': 0,
  48             'replacement_params': deck.get('replacement_params', None),
  49         }
  50         player = Player(initial_bits, initial_pos)
  51         board_locations = cls.import_board_locations(
  52             cls.generate_board(deck))
  53         return cls(state, player, board_locations)
  54
  55     @classmethod
  56     def import_game(cls, definition):
  57         state = definition.copy()
  58         player = Player.import_player(state.pop('player'))
  59         board_locations = cls.import_board_locations(
  60             state.pop('board_locations'))
  61         return cls(state, player, board_locations)
  62
  63     def export(self):
  64         data = {
  65             'max_health': self.max_health,
  66             'health': self.health,
  67             'wins_required': self.wins_required,
  68             'wins': self.wins,
  69             'locations': [item.copy() for item in self.locations],
  70             'puzzle': self.puzzle,
  71             'player': self.player.export(),
  72             'board_locations': self.export_board_locations(),
  73             'player_mode': self.player_mode,
  74             'clock_count': self.clock_count,
  75             'replacement_params': self.replacement_params,
  76         }
  77         if self.has_cheated:
  78             data['cheater'] = True
  79         return data
  80
  81     @classmethod
  82     def import_locations(cls, locations_definition):
  83         return [
  84             LocationCard.import_location(definition)
  85             for definition in locations_definition]
  86
  87     def export_board_locations(self):
  88         return sorted(
  89             (position, location.export())
  90             for position, location in self.board_locations.iteritems())
  91
  92     @classmethod
  93     def import_board_locations(cls, board_locations_definition):
  94         return dict(
  95             (tuple(position), LocationCard.import_location(definition))
  96             for position, definition in board_locations_definition)
  97
  98     @classmethod
  99     def generate_board(cls, deck):
 100         if deck.get('puzzle', False):
 101             return cls.generate_puzzle_board(deck)
 102         else:
 103             return cls.generate_random_board(deck)
 104
 105     @classmethod
 106     def generate_puzzle_board(cls, deck):
 107         assert len(deck['cards']) == 5 * 5
 108         replacement_params = deck.get('replacement_params', None)
 109         board_locations = [
 110             [(i % 5, i // 5),
 111              LocationCard.new_location(
 112                  card.copy(), replacement_params).export()]
 113             for i, card in enumerate(deck['cards'])
 114         ]
 115         return board_locations
 116
 117     @classmethod
 118     def generate_random_board(cls, deck):
 119         board_locations = []
 120         replacement_params = deck.get('replacement_params', None)
 121         for x in range(5):
 122             for y in range(5):
 123                 new_choice = cls.choose_card(deck['cards'], board_locations)
 124                 board_location = LocationCard.new_location(
 125                     new_choice.copy(), replacement_params)
 126                 board_locations.append([(x, y), board_location.export()])
 127         return board_locations
 128
 129     def lose_health(self):
 130         self.health -= 1
 131         if self.health <= 0:
 132             self.end_game(win=False)
 133
 134     def gain_health(self):
 135         if self.health < self.max_health:
 136             self.health += 1
 137
 138     def acquire_win_token(self):
 139         self.wins += 1
 140         if self.wins >= self.wins_required:
 141             self.end_game(win=True)
 142
 143     def card_used(self, position):
 144         if not self.puzzle:
 145             self.replace_card(position)
 146
 147     def replace_card(self, position):
 148         new_choice = self.choose_card(self.locations,
 149                                       self.board_locations.items(),
 150                                       position)
 151         location = LocationCard.new_location(new_choice.copy(),
 152                                              self.replacement_params)
 153         self.board_locations[position] = location
 154
 155     @classmethod
 156     def choose_card(cls, cards, board_locations, position=None):
 157         # Find which cards are at their maximum and exclude them from
 158         # the choice list
 159         counts = {}
 160         choices = {card['card_name']: card for card in cards}
 161         for pos, card in board_locations:
 162             if pos == position:
 163                 # skip the card we're replacing if appropriate
 164                 continue
 165             if isinstance(card, LocationCard):
 166                 key = card.card_name
 167                 max_num = card.max_number
 168             else:
 169                 key = card['card_name']
 170                 max_num = card.get('max_number', 25)
 171             counts.setdefault(key, 0)
 172             counts[key] += 1
 173             if counts[key] >= max_num:
 174                 if key in choices:
 175                     del choices[key]
 176         return choice(choices.values())
 177
 178     def shift_location_row(self, change, is_vertical):
 179         px, py = self.player.position
 180         shifted_locations = {}
 181         mkpos = lambda i: (px, i) if is_vertical else (i, py)
 182
 183         for i in range(5):
 184             if (px, py) == mkpos(i):
 185                 continue
 186             new_i = (i + change) % 5
 187             if (px, py) == mkpos(new_i):
 188                 new_i = (new_i + change) % 5
 189             shifted_locations[mkpos(new_i)] = self.board_locations[mkpos(i)]
 190
 191         self.board_locations.update(shifted_locations)
 192
 193     def shift_locations(self, direction):
 194         if BITS[direction] == BITS.NORTH:
 195             self.shift_location_row(-1, is_vertical=True)
 196         elif BITS[direction] == BITS.SOUTH:
 197             self.shift_location_row(1, is_vertical=True)
 198         elif BITS[direction] == BITS.EAST:
 199             self.shift_location_row(1, is_vertical=False)
 200         elif BITS[direction] == BITS.WEST:
 201             self.shift_location_row(-1, is_vertical=False)
 202
 203     def rotate_locations(self, direction):
 204         px, py = self.player.position
 205         locations_to_rotate = []
 206         rotated_locations = {}
 207
 208         if py > 0:
 209             for i in range(max(0, px - 1), min(5, px + 2)):
 210                 locations_to_rotate.append((i, py - 1))
 211
 212         if px < 4:
 213             locations_to_rotate.append((px + 1, py))
 214
 215         if py < 4:
 216             for i in reversed(range(max(0, px - 1), min(5, px + 2))):
 217                 locations_to_rotate.append((i, py + 1))
 218
 219         if px > 0:
 220             locations_to_rotate.append((px - 1, py))
 221
 222         if ROTATION[direction] == ROTATION.CLOCKWISE:
 223             new_positions = locations_to_rotate[1:] + [locations_to_rotate[0]]
 224         elif ROTATION[direction] == ROTATION.ANTICLOCKWISE:
 225             new_positions = ([locations_to_rotate[-1]] + locations_to_rotate[:-1])
 226
 227         for old, new in zip(locations_to_rotate, new_positions):
 228             rotated_locations[new] = self.board_locations[old]
 229
 230         self.board_locations.update(rotated_locations)
 231
 232     def allow_chess_move(self, chesspiece):
 233         self.player.allow_chess_move(chesspiece)
 234
 235     def change_mode(self, new_mode):
 236         """Advance to the next mode"""
 237         if new_mode == self.player_mode:
 238             raise RuntimeError("Inconsistent state. Setting mode %s to itself"
 239                                % self.player_mode)
 240         elif new_mode in (ACT, EXAMINE):
 241             self.player_mode = new_mode
 242             if new_mode is EXAMINE:
 243                 self.board_update()
 244         else:
 245             raise RuntimeError("Illegal player mode %s" % self.player_mode)
 246
 247     def board_update(self):
 248         self.clock_count += 1
 249         for position, location in self.board_locations.iteritems():
 250             location.timer_action(position, self)
 251
 252     def end_game(self, win):
 253         # TODO: Find a way to not have UI stuff in game logic stuff.
 254         from naja.events import SceneChangeEvent
 255         from naja.scenes.lose import LoseScene
 256         from naja.scenes.win import WinScene
 257         sound.stop()
 258         if win:
 259             SceneChangeEvent.post(WinScene)
 260         else:
 261             SceneChangeEvent.post(LoseScene)
 262
 263
 264 class LocationCard(object):
 265     """
 266     A particular set of options available on a location.
 267     """
 268
 269     def __init__(self, card_name, bitwise_operand, location_actions,
 270                  replacement_time, max_number=25):
 271         self.card_name = card_name
 272         self.bitwise_operand = bitwise_operand
 273         self.actions = location_actions
 274         self.max_number = max_number
 275         self.check_actions()
 276         self.replacement_time = replacement_time
 277
 278     @classmethod
 279     def import_location(cls, state):
 280         location_actions = [
 281             cls.build_action(definition) for definition in state['actions']]
 282         return cls(state['card_name'], state['bitwise_operand'],
 283                    location_actions, state['replacement_time'],
 284                    state['max_number'])
 285
 286     @classmethod
 287     def build_action(cls, definition):
 288         action_class = getattr(actions, definition['action_class'])
 289         required_bits = cls.parse_bits(definition['required_bits'])
 290         data = definition.get('data', {})
 291         return action_class(required_bits, **data)
 292
 293     @classmethod
 294     def new_location(cls, definition, replacement_params):
 295         if 'bits' in definition:
 296             bits = cls.parse_bits(definition['bits'])
 297         else:
 298             bits = cls.generate_bitwise_operand()
 299
 300         if 'replacement_time' in definition:
 301             replacement_time = definition['replacement_time']
 302         else:
 303             replacement_time = cls.generate_replacement_time(
 304                 replacement_params)
 305
 306         max_number = definition.get('max_number', 25)
 307         card_name = definition['card_name']
 308         return cls.import_location({
 309             'bitwise_operand': bits,
 310             'actions': definition['actions'],
 311             'max_number': max_number,
 312             'card_name': card_name,
 313             'replacement_time': replacement_time,
 314         })
 315
 316     @classmethod
 317     def parse_bits(self, bit_list):
 318         # Convert names to numbers if applicable.
 319         return frozenset(BITS.get(bit, bit) for bit in bit_list)
 320
 321     def export(self):
 322         return {
 323             'bitwise_operand': sorted(self.bitwise_operand),
 324             'actions': [action.export() for action in self.actions],
 325             'max_number': self.max_number,
 326             'card_name': self.card_name,
 327             'replacement_time': self.replacement_time,
 328         }
 329
 330     def check_actions(self):
 331         if not self.actions:
 332             print "Warning: Location has no actions."
 333             self.insert_default_default_action()
 334         if self.actions[0].required_bits:
 335             self.insert_default_default_action()
 336
 337     def insert_default_default_action(self):
 338         self.actions.insert(0, self.build_action({
 339             'action_class': 'DoNothing',
 340             'required_bits': [],
 341         }))
 342
 343     @staticmethod
 344     def generate_bitwise_operand():
 345         """
 346         Generate a set of two or three bits. At least one direction and one
 347         condition bit will be included. There is a low probability of choosing
 348         a third bit from the complete set.
 349         """
 350         bits = set()
 351         bits.add(choice(DIRECTION_BITS.values()))
 352         bits.add(choice(CONDITION_BITS.values()))
 353         # One in three chance of adding a third bit, with a further one in four
 354         # chance that it will match a bit already chosen.
 355         if choice(range(3)) == 0:
 356             bits.add(choice(BITS.values()))
 357         return frozenset(bits)
 358
 359     @staticmethod
 360     def generate_replacement_time(replacement_params):
 361         if replacement_params is None:
 362             return None
 363         else:
 364             if replacement_params['chance'] > random.random():
 365                 return random.randint(replacement_params['min'],
 366                                       replacement_params['max'])
 367             else:
 368                 return None
 369
 370     def timer_action(self, position, board):
 371         if self.replacement_time is not None:
 372             self.replacement_time -= 1
 373             if self.replacement_time <= 0:
 374                 board.replace_card(position)
 375