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