naja/gameboard.py

   1 from random import choice
   2
   3 from naja.constants import BITS, DIRECTION_BITS, CONDITION_BITS
   4 from naja.player import Player
   5 from naja import actions
   6
   7
   8 class GameBoard(object):
   9     """
  10     A representation of the game board.
  11     """
  12
  13     def __init__(self, state, player, board_locations):
  14         self.max_health = state['max_health']
  15         self.wins_required = state['wins_required']
  16         self.health = state['health']
  17         self.wins = state['wins']
  18         self.locations = self.import_locations(state['locations'])
  19         self.player = player
  20         self.board_locations = board_locations
  21
  22     @classmethod
  23     def new_game(cls, max_health, wins_required, locations_definition):
  24         state = {
  25             'max_health': max_health,
  26             'health': max_health,
  27             'wins_required': wins_required,
  28             'wins': 0,
  29             'locations': locations_definition,
  30         }
  31         player = Player(0x0f, (2, 2))
  32         board_locations = cls.generate_board(locations_definition)
  33         return cls(state, player, board_locations)
  34
  35     @classmethod
  36     def import_game(cls, definition):
  37         state = definition.copy()
  38         player = Player.import_player(state.pop('player'))
  39         board_locations = cls.import_board_locations(
  40             state.pop('board_locations'))
  41         return cls(state, player, board_locations)
  42
  43     def export(self):
  44         return {
  45             'max_health': self.max_health,
  46             'health': self.health,
  47             'wins_required': self.wins_required,
  48             'wins': self.wins,
  49             'locations': self.export_locations(),
  50             'player': self.player.export(),
  51             'board_locations': self.export_board_locations(),
  52         }
  53
  54     def export_locations(self):
  55         return [location.export() for location in self.locations]
  56
  57     @classmethod
  58     def import_locations(cls, locations_definition):
  59         return [
  60             LocationCard.import_location(definition)
  61             for definition in locations_definition]
  62
  63     def export_board_locations(self):
  64         return dict(
  65             (position, location.export())
  66             for position, location in self.board_locations)
  67
  68     @classmethod
  69     def import_board_locations(cls, board_locations_definition):
  70         return dict(
  71             (position, LocationCard.import_location(definition))
  72             for position, definition in board_locations_definition.iteritems())
  73
  74     @classmethod
  75     def generate_board(cls, locations_definition):
  76         # TODO: Choose some locations.
  77         return {}
  78
  79     def lose_health(self):
  80         self.health -= 1
  81         # TODO: Check win/lose
  82
  83
  84 class LocationCard(object):
  85     """
  86     A particular set of options available on a location.
  87     """
  88
  89     def __init__(self, bitwise_operand, location_actions):
  90         self.bitwise_operand = bitwise_operand
  91         self.actions = location_actions
  92
  93     @classmethod
  94     def import_location(cls, state):
  95         # TODO: Import real locations.
  96         location_actions = [
  97             cls.build_action(definition) for definition in state['actions']]
  98         return cls(state['bitwise_operand'], location_actions)
  99
 100     @classmethod
 101     def build_action(cls, definition):
 102         action_class = getattr(actions, definition['action_class'])
 103         required_bits = definition['required_bits']
 104         data = definition.get('data', {})
 105         return action_class(required_bits, **data)
 106
 107     @classmethod
 108     def new_location(cls, definition):
 109         return cls.import_location({
 110             'bitwise_operand': cls.generate_bitwise_operand(),
 111             'actions': definition['actions'],
 112         })
 113
 114     def export(self):
 115         return {
 116             'bitwise_operand': self.bitwise_operand,
 117             'actions': [action.export() for action in self.actions],
 118         }
 119
 120     @staticmethod
 121     def generate_bitwise_operand():
 122         """
 123         Generate a set of two or three bits. At least one direction and one
 124         condition bit will be included. There is a low probability of choosing
 125         a third bit from the complete set.
 126         """
 127         bits = set()
 128         bits.add(choice(DIRECTION_BITS.values()))
 129         bits.add(choice(CONDITION_BITS.values()))
 130         # One in three chance of adding a third bit, with a further one in four
 131         # chance that it will match a bit already chosen.
 132         if choice(range(3)) == 0:
 133             bits.add(choice(BITS.values()))
 134         return frozenset(bits)