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