naja/gameboard.py

   1 from random import choice
   2
   3 from naja.constants import(
   4     BITS, DIRECTION_BITS, CONDITION_BITS, PLAYER_DEFAULTS)
   5 from naja.player import Player
   6 from naja import actions
   7
   8
   9 class GameBoard(object):
  10     """
  11     A representation of the game board.
  12     """
  13
  14     def __init__(self, state, player, board_locations):
  15         self.max_health = state['max_health']
  16         self.wins_required = state['wins_required']
  17         self.health = state['health']
  18         self.wins = state['wins']
  19         self.locations = self.import_locations(state['locations'])
  20         self.player = player
  21         self.board_locations = board_locations
  22
  23     @classmethod
  24     def new_game(cls, locations_definition,
  25                  initial_bits=PLAYER_DEFAULTS.INITIAL_BITS,
  26                  initial_pos=PLAYER_DEFAULTS.INITIAL_POS,
  27                  max_health=PLAYER_DEFAULTS.MAX_HEALTH,
  28                  wins_required=PLAYER_DEFAULTS.WINS_REQUIRED):
  29         state = {
  30             'max_health': max_health,
  31             'health': max_health,
  32             'wins_required': wins_required,
  33             'wins': 0,
  34             'locations': locations_definition,
  35         }
  36         player = Player(initial_bits, initial_pos)
  37         board_locations = cls.generate_board(locations_definition)
  38         return cls(state, player, board_locations)
  39
  40     @classmethod
  41     def import_game(cls, definition):
  42         state = definition.copy()
  43         player = Player.import_player(state.pop('player'))
  44         board_locations = cls.import_board_locations(
  45             state.pop('board_locations'))
  46         return cls(state, player, board_locations)
  47
  48     def export(self):
  49         return {
  50             'max_health': self.max_health,
  51             'health': self.health,
  52             'wins_required': self.wins_required,
  53             'wins': self.wins,
  54             'locations': self.export_locations(),
  55             'player': self.player.export(),
  56             'board_locations': self.export_board_locations(),
  57         }
  58
  59     def export_locations(self):
  60         return [location.export() for location in self.locations]
  61
  62     @classmethod
  63     def import_locations(cls, locations_definition):
  64         return [
  65             LocationCard.import_location(definition)
  66             for definition in locations_definition]
  67
  68     def export_board_locations(self):
  69         return dict(
  70             (position, location.export())
  71             for position, location in self.board_locations)
  72
  73     @classmethod
  74     def import_board_locations(cls, board_locations_definition):
  75         return dict(
  76             (position, LocationCard.import_location(definition))
  77             for position, definition in board_locations_definition.iteritems())
  78
  79     @classmethod
  80     def generate_board(cls, locations_definition):
  81         # TODO: Choose some locations.
  82         return {}
  83
  84     def lose_health(self):
  85         self.health -= 1
  86         # TODO: Check win/lose
  87
  88
  89 class LocationCard(object):
  90     """
  91     A particular set of options available on a location.
  92     """
  93
  94     def __init__(self, bitwise_operand, location_actions):
  95         self.bitwise_operand = bitwise_operand
  96         self.actions = location_actions
  97
  98     @classmethod
  99     def import_location(cls, state):
 100         # TODO: Import real locations.
 101         location_actions = [
 102             cls.build_action(definition) for definition in state['actions']]
 103         return cls(state['bitwise_operand'], location_actions)
 104
 105     @classmethod
 106     def build_action(cls, definition):
 107         action_class = getattr(actions, definition['action_class'])
 108         required_bits = definition['required_bits']
 109         data = definition.get('data', {})
 110         return action_class(required_bits, **data)
 111
 112     @classmethod
 113     def new_location(cls, definition):
 114         return cls.import_location({
 115             'bitwise_operand': cls.generate_bitwise_operand(),
 116             'actions': definition['actions'],
 117         })
 118
 119     def export(self):
 120         return {
 121             'bitwise_operand': self.bitwise_operand,
 122             'actions': [action.export() for action in self.actions],
 123         }
 124
 125     @staticmethod
 126     def generate_bitwise_operand():
 127         """
 128         Generate a set of two or three bits. At least one direction and one
 129         condition bit will be included. There is a low probability of choosing
 130         a third bit from the complete set.
 131         """
 132         bits = set()
 133         bits.add(choice(DIRECTION_BITS.values()))
 134         bits.add(choice(CONDITION_BITS.values()))
 135         # One in three chance of adding a third bit, with a further one in four
 136         # chance that it will match a bit already chosen.
 137         if choice(range(3)) == 0:
 138             bits.add(choice(BITS.values()))
 139         return frozenset(bits)