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
  10
  11 class GameBoard(object):
  12     """
  13     A representation of the game board.
  14     """
  15
  16     def __init__(self, state, player, board_locations):
  17         self.max_health = state['max_health']
  18         self.wins_required = state['wins_required']
  19         self.health = state['health']
  20         self.wins = state['wins']
  21         self.locations = [item.copy() for item in state['locations']]
  22         self.puzzle = state['puzzle']
  23         self.player = player
  24         self.board_locations = board_locations
  25         self.player_mode = EXAMINE
  26
  27     @classmethod
  28     def new_game(cls, deck,
  29                  initial_bits=PLAYER_DEFAULTS.INITIAL_BITS,
  30                  initial_pos=PLAYER_DEFAULTS.INITIAL_POS,
  31                  max_health=PLAYER_DEFAULTS.MAX_HEALTH,
  32                  wins_required=PLAYER_DEFAULTS.WINS_REQUIRED):
  33         if options.initial_bits:
  34             initial_bits = options.initial_bits
  35         state = {
  36             'max_health': max_health,
  37             'health': max_health,
  38             'wins_required': wins_required,
  39             'wins': 0,
  40             'locations': deck['cards'],
  41             'puzzle': deck.get('puzzle', False),
  42         }
  43         player = Player(initial_bits, initial_pos)
  44         board_locations = cls.import_board_locations(
  45             cls.generate_board(deck))
  46         return cls(state, player, board_locations)
  47
  48     @classmethod
  49     def import_game(cls, definition):
  50         state = definition.copy()
  51         player = Player.import_player(state.pop('player'))
  52         board_locations = cls.import_board_locations(
  53             state.pop('board_locations'))
  54         return cls(state, player, board_locations)
  55
  56     def export(self):
  57         return {
  58             'max_health': self.max_health,
  59             'health': self.health,
  60             'wins_required': self.wins_required,
  61             'wins': self.wins,
  62             'locations': [item.copy() for item in self.locations],
  63             'puzzle': self.puzzle,
  64             'player': self.player.export(),
  65             'board_locations': self.export_board_locations(),
  66         }
  67
  68     @classmethod
  69     def import_locations(cls, locations_definition):
  70         return [
  71             LocationCard.import_location(definition)
  72             for definition in locations_definition]
  73
  74     def export_board_locations(self):
  75         return sorted(
  76             (position, location.export())
  77             for position, location in self.board_locations.iteritems())
  78
  79     @classmethod
  80     def import_board_locations(cls, board_locations_definition):
  81         return dict(
  82             (tuple(position), LocationCard.import_location(definition))
  83             for position, definition in board_locations_definition)
  84
  85     @classmethod
  86     def generate_board(cls, deck):
  87         if deck.get('puzzle', False):
  88             return cls.generate_puzzle_board(deck)
  89         else:
  90             return cls.generate_random_board(deck)
  91
  92     @classmethod
  93     def generate_puzzle_board(cls, deck):
  94         assert len(deck['cards']) == 5 * 5
  95         board_locations = [
  96             [(i % 5, i // 5),
  97              LocationCard.new_location(card.copy()).export()]
  98             for i, card in enumerate(deck['cards'])
  99         ]
 100         return board_locations
 101
 102     @classmethod
 103     def generate_random_board(cls, deck):
 104         board_locations = []
 105         for x in range(5):
 106             for y in range(5):
 107                 board_location = LocationCard.new_location(
 108                     choice(deck['cards']).copy())
 109                 board_locations.append([(x, y), board_location.export()])
 110         return board_locations
 111
 112     def lose_health(self):
 113         self.health -= 1
 114         if self.health <= 0:
 115             self.end_game(win=False)
 116
 117     def gain_health(self):
 118         if self.health < self.max_health:
 119             self.health += 1
 120
 121     def acquire_win_token(self):
 122         self.wins += 1
 123         if self.wins >= self.wins_required:
 124             self.end_game(win=True)
 125
 126     def card_used(self, position):
 127         if not self.puzzle:
 128             self.replace_card(position)
 129
 130     def replace_card(self, position):
 131         location = LocationCard.new_location(choice(self.locations).copy())
 132         self.board_locations[position] = location
 133
 134     def shift_location_row(self, change, is_vertical):
 135         px, py = self.player.position
 136         shifted_locations = {}
 137         mkpos = lambda i: (px, i) if is_vertical else (i, py)
 138
 139         for i in range(5):
 140             if (px, py) == mkpos(i):
 141                 continue
 142             new_i = (i + change) % 5
 143             if (px, py) == mkpos(new_i):
 144                 new_i = (new_i + change) % 5
 145             shifted_locations[mkpos(new_i)] = self.board_locations[mkpos(i)]
 146
 147         self.board_locations.update(shifted_locations)
 148
 149     def shift_locations(self, direction):
 150         if BITS[direction] == BITS.NORTH:
 151             self.shift_location_row(-1, is_vertical=True)
 152         elif BITS[direction] == BITS.SOUTH:
 153             self.shift_location_row(1, is_vertical=True)
 154         elif BITS[direction] == BITS.EAST:
 155             self.shift_location_row(1, is_vertical=False)
 156         elif BITS[direction] == BITS.WEST:
 157             self.shift_location_row(-1, is_vertical=False)
 158
 159     def rotate_locations(self, direction):
 160         px, py = self.player.position
 161         locations_to_rotate = []
 162         rotated_locations = {}
 163
 164         if py > 0:
 165             for i in range(max(0, px - 1), min(5, px + 2)):
 166                 locations_to_rotate.append((i, py - 1))
 167
 168         if px < 4:
 169             locations_to_rotate.append((px + 1, py))
 170
 171         if py < 4:
 172             for i in reversed(range(max(0, px - 1), min(5, px + 2))):
 173                 locations_to_rotate.append((i, py + 1))
 174
 175         if px > 0:
 176             locations_to_rotate.append((px - 1, py))
 177
 178         if ROTATION[direction] == ROTATION.CLOCKWISE:
 179             new_positions = locations_to_rotate[1:] + [locations_to_rotate[0]]
 180         elif ROTATION[direction] == ROTATION.ANTICLOCKWISE:
 181             new_positions = (
 182                 [locations_to_rotate[-1]] + locations_to_rotate[:-1])
 183
 184         for old, new in zip(locations_to_rotate, new_positions):
 185             rotated_locations[old] = self.board_locations[new]
 186
 187         self.board_locations.update(rotated_locations)
 188
 189     def allow_chess_move(self, chesspiece):
 190         self.player.allow_chess_move(chesspiece)
 191
 192     def change_mode(self, new_mode):
 193         """Advance to the next mode"""
 194         if new_mode == self.player_mode:
 195             raise RuntimeError("Inconsistent state. Setting mode %s to itself"
 196                                % self.player_mode)
 197         elif new_mode in (ACT, EXAMINE):
 198             self.player_mode = new_mode
 199         else:
 200             raise RuntimeError("Illegal player mode %s" % self.player_mode)
 201
 202     def end_game(self, win):
 203         # TODO: Find a way to not have UI stuff in game logic stuff.
 204         from naja.events import SceneChangeEvent
 205         from naja.scenes.lose import LoseScene
 206         from naja.scenes.win import WinScene
 207         if win:
 208             SceneChangeEvent.post(WinScene)
 209         else:
 210             SceneChangeEvent.post(LoseScene)
 211
 212
 213 class LocationCard(object):
 214     """
 215     A particular set of options available on a location.
 216     """
 217
 218     def __init__(self, bitwise_operand, location_actions):
 219         self.bitwise_operand = bitwise_operand
 220         self.actions = location_actions
 221         self.check_actions()
 222
 223     @classmethod
 224     def import_location(cls, state):
 225         location_actions = [
 226             cls.build_action(definition) for definition in state['actions']]
 227         return cls(state['bitwise_operand'], location_actions)
 228
 229     @classmethod
 230     def build_action(cls, definition):
 231         action_class = getattr(actions, definition['action_class'])
 232         required_bits = cls.parse_bits(definition['required_bits'])
 233         data = definition.get('data', {})
 234         return action_class(required_bits, **data)
 235
 236     @classmethod
 237     def new_location(cls, definition):
 238         if 'bits' in definition:
 239             bits = cls.parse_bits(definition['bits'])
 240         else:
 241             bits = cls.generate_bitwise_operand()
 242         return cls.import_location({
 243             'bitwise_operand': bits,
 244             'actions': definition['actions'],
 245         })
 246
 247     @classmethod
 248     def parse_bits(self, bit_list):
 249         # Convert names to numbers if applicable.
 250         return frozenset(BITS.get(bit, bit) for bit in bit_list)
 251
 252     def export(self):
 253         return {
 254             'bitwise_operand': sorted(self.bitwise_operand),
 255             'actions': [action.export() for action in self.actions],
 256         }
 257
 258     def check_actions(self):
 259         if not self.actions:
 260             print "Warning: Location has no actions."
 261             self.insert_default_default_action()
 262         if self.actions[0].required_bits:
 263             self.insert_default_default_action()
 264
 265     def insert_default_default_action(self):
 266         self.actions.insert(0, self.build_action({
 267             'action_class': 'DoNothing',
 268             'required_bits': [],
 269         }))
 270
 271     @staticmethod
 272     def generate_bitwise_operand():
 273         """
 274         Generate a set of two or three bits. At least one direction and one
 275         condition bit will be included. There is a low probability of choosing
 276         a third bit from the complete set.
 277         """
 278         bits = set()
 279         bits.add(choice(DIRECTION_BITS.values()))
 280         bits.add(choice(CONDITION_BITS.values()))
 281         # One in three chance of adding a third bit, with a further one in four
 282         # chance that it will match a bit already chosen.
 283         if choice(range(3)) == 0:
 284             bits.add(choice(BITS.values()))
 285         return frozenset(bits)