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 = [item.copy() for item in 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.import_board_locations(
  38             cls.generate_board(locations_definition))
  39         return cls(state, player, board_locations)
  40
  41     @classmethod
  42     def import_game(cls, definition):
  43         state = definition.copy()
  44         player = Player.import_player(state.pop('player'))
  45         board_locations = cls.import_board_locations(
  46             state.pop('board_locations'))
  47         return cls(state, player, board_locations)
  48
  49     def export(self):
  50         return {
  51             'max_health': self.max_health,
  52             'health': self.health,
  53             'wins_required': self.wins_required,
  54             'wins': self.wins,
  55             'locations': [item.copy() for item in self.locations],
  56             'player': self.player.export(),
  57             'board_locations': self.export_board_locations(),
  58         }
  59
  60     @classmethod
  61     def import_locations(cls, locations_definition):
  62         return [
  63             LocationCard.import_location(definition)
  64             for definition in locations_definition]
  65
  66     def export_board_locations(self):
  67         return dict(
  68             (position, location.export())
  69             for position, location in self.board_locations.iteritems())
  70
  71     @classmethod
  72     def import_board_locations(cls, board_locations_definition):
  73         return dict(
  74             (position, LocationCard.import_location(definition))
  75             for position, definition in board_locations_definition.iteritems())
  76
  77     @classmethod
  78     def generate_board(cls, locations_definition):
  79         board_locations = {}
  80         for x in range(5):
  81             for y in range(5):
  82                 board_location = LocationCard.new_location(
  83                     choice(locations_definition).copy())
  84                 board_locations[(x, y)] = board_location.export()
  85         return board_locations
  86
  87     def lose_health(self):
  88         self.health -= 1
  89         # TODO: Check win/lose
  90
  91
  92 class LocationCard(object):
  93     """
  94     A particular set of options available on a location.
  95     """
  96
  97     def __init__(self, bitwise_operand, location_actions):
  98         self.bitwise_operand = bitwise_operand
  99         self.actions = location_actions
 100
 101     @classmethod
 102     def import_location(cls, state):
 103         location_actions = [
 104             cls.build_action(definition) for definition in state['actions']]
 105         return cls(state['bitwise_operand'], location_actions)
 106
 107     @classmethod
 108     def build_action(cls, definition):
 109         action_class = getattr(actions, definition['action_class'])
 110         required_bits = definition['required_bits']
 111         data = definition.get('data', {})
 112         return action_class(required_bits, **data)
 113
 114     @classmethod
 115     def new_location(cls, definition):
 116         return cls.import_location({
 117             'bitwise_operand': cls.generate_bitwise_operand(),
 118             'actions': definition['actions'],
 119         })
 120
 121     def export(self):
 122         return {
 123             'bitwise_operand': self.bitwise_operand,
 124             'actions': [action.export() for action in self.actions],
 125         }
 126
 127     @staticmethod
 128     def generate_bitwise_operand():
 129         """
 130         Generate a set of two or three bits. At least one direction and one
 131         condition bit will be included. There is a low probability of choosing
 132         a third bit from the complete set.
 133         """
 134         bits = set()
 135         bits.add(choice(DIRECTION_BITS.values()))
 136         bits.add(choice(CONDITION_BITS.values()))
 137         # One in three chance of adding a third bit, with a further one in four
 138         # chance that it will match a bit already chosen.
 139         if choice(range(3)) == 0:
 140             bits.add(choice(BITS.values()))
 141         return frozenset(bits)