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