Shift board locations.
[naja.git] / naja / gameboard.py
1 from random import choice
2
3 from naja.constants import(
4     BITS, DIRECTION_BITS, CONDITION_BITS, PLAYER_DEFAULTS,
5     MOVE, ACT, EXAMINE)
6 from naja.player import Player
7 from naja import actions
8
9
10 class GameBoard(object):
11     """
12     A representation of the game board.
13     """
14
15     def __init__(self, state, player, board_locations):
16         self.max_health = state['max_health']
17         self.wins_required = state['wins_required']
18         self.health = state['health']
19         self.wins = state['wins']
20         self.locations = [item.copy() for item in state['locations']]
21         self.player = player
22         self.board_locations = board_locations
23         self.player_mode = MOVE
24
25     @classmethod
26     def new_game(cls, locations_definition,
27                  initial_bits=PLAYER_DEFAULTS.INITIAL_BITS,
28                  initial_pos=PLAYER_DEFAULTS.INITIAL_POS,
29                  max_health=PLAYER_DEFAULTS.MAX_HEALTH,
30                  wins_required=PLAYER_DEFAULTS.WINS_REQUIRED):
31         state = {
32             'max_health': max_health,
33             'health': max_health,
34             'wins_required': wins_required,
35             'wins': 0,
36             'locations': locations_definition,
37         }
38         player = Player(initial_bits, initial_pos)
39         board_locations = cls.import_board_locations(
40             cls.generate_board(locations_definition))
41         return cls(state, player, board_locations)
42
43     @classmethod
44     def import_game(cls, definition):
45         state = definition.copy()
46         player = Player.import_player(state.pop('player'))
47         board_locations = cls.import_board_locations(
48             state.pop('board_locations'))
49         return cls(state, player, board_locations)
50
51     def export(self):
52         return {
53             'max_health': self.max_health,
54             'health': self.health,
55             'wins_required': self.wins_required,
56             'wins': self.wins,
57             'locations': [item.copy() for item in self.locations],
58             'player': self.player.export(),
59             'board_locations': self.export_board_locations(),
60         }
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.iteritems())
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         board_locations = {}
82         for x in range(5):
83             for y in range(5):
84                 board_location = LocationCard.new_location(
85                     choice(locations_definition).copy())
86                 board_locations[(x, y)] = board_location.export()
87         return board_locations
88
89     def lose_health(self):
90         self.health -= 1
91         if self.health <= 0:
92             self.end_game(win=False)
93
94     def gain_health(self):
95         if self.health < self.max_health:
96             self.health += 1
97
98     def acquire_win_token(self):
99         self.wins += 1
100         if self.wins >= self.wins_required:
101             self.end_game(win=True)
102
103     def replace_card(self, position):
104         location = LocationCard.new_location(choice(self.locations).copy())
105         self.board_locations[position] = location
106
107     def shift_locations(self, direction):
108         px, py = self.player.position
109         shifted_locations = {}
110         # TODO: Make this less horrible. Also test it.
111         if BITS[direction] == BITS.NORTH:
112             for y in range(5):
113                 if y == py:
114                     continue
115                 new_y = y - 1
116                 if new_y == py:
117                     new_y -= 1
118                 new_y %= 5
119                 shifted_locations[(px, new_y)] = self.board_locations[(px, y)]
120         elif BITS[direction] == BITS.SOUTH:
121             for y in range(5):
122                 if y == py:
123                     continue
124                 new_y = y + 1
125                 if new_y == py:
126                     new_y += 1
127                 new_y %= 5
128                 shifted_locations[(px, new_y)] = self.board_locations[(px, y)]
129         elif BITS[direction] == BITS.EAST:
130             for x in range(5):
131                 if x == px:
132                     continue
133                 new_x = x + 1
134                 if new_x == px:
135                     new_x += 1
136                 new_x %= 5
137                 shifted_locations[(new_x, py)] = self.board_locations[(x, py)]
138         elif BITS[direction] == BITS.WEST:
139             for x in range(5):
140                 if x == px:
141                     continue
142                 new_x = x - 1
143                 if new_x == px:
144                     new_x -= 1
145                 new_x %= 5
146                 shifted_locations[(new_x, py)] = self.board_locations[(x, py)]
147
148         self.board_locations.update(shifted_locations)
149
150     def change_mode(self, new_mode):
151         """Advance to the next mode"""
152         if new_mode == self.player_mode:
153             raise RuntimeError("Inconsistent state. Setting mode %s to itself"
154                                % self.player_mode)
155         elif new_mode in (MOVE, ACT, EXAMINE):
156             self.player_mode = new_mode
157         else:
158             raise RuntimeError("Illegal player mode %s" % self.player_mode)
159
160     def end_game(self, win):
161         # TODO: Find a way to not have UI stuff in game logic stuff.
162         from naja.events import SceneChangeEvent
163         from naja.scenes.lose import LoseScene
164         from naja.scenes.win import WinScene
165         if win:
166             SceneChangeEvent.post(WinScene)
167         else:
168             SceneChangeEvent.post(LoseScene)
169
170
171 class LocationCard(object):
172     """
173     A particular set of options available on a location.
174     """
175
176     def __init__(self, bitwise_operand, location_actions):
177         self.bitwise_operand = bitwise_operand
178         self.actions = location_actions
179         self.check_actions()
180
181     @classmethod
182     def import_location(cls, state):
183         location_actions = [
184             cls.build_action(definition) for definition in state['actions']]
185         return cls(state['bitwise_operand'], location_actions)
186
187     @classmethod
188     def build_action(cls, definition):
189         action_class = getattr(actions, definition['action_class'])
190         required_bits = definition['required_bits']
191         data = definition.get('data', {})
192         return action_class(required_bits, **data)
193
194     @classmethod
195     def new_location(cls, definition):
196         return cls.import_location({
197             'bitwise_operand': cls.generate_bitwise_operand(),
198             'actions': definition['actions'],
199         })
200
201     def export(self):
202         return {
203             'bitwise_operand': self.bitwise_operand,
204             'actions': [action.export() for action in self.actions],
205         }
206
207     def check_actions(self):
208         if not self.actions:
209             print "Warning: Location has no actions."
210             self.insert_default_default_action()
211         if self.actions[0].required_bits:
212             self.insert_default_default_action()
213
214     def insert_default_default_action(self):
215         self.actions.insert(0, self.build_action({
216             'action_class': 'DoNothing',
217             'required_bits': [],
218         }))
219
220     @staticmethod
221     def generate_bitwise_operand():
222         """
223         Generate a set of two or three bits. At least one direction and one
224         condition bit will be included. There is a low probability of choosing
225         a third bit from the complete set.
226         """
227         bits = set()
228         bits.add(choice(DIRECTION_BITS.values()))
229         bits.add(choice(CONDITION_BITS.values()))
230         # One in three chance of adding a third bit, with a further one in four
231         # chance that it will match a bit already chosen.
232         if choice(range(3)) == 0:
233             bits.add(choice(BITS.values()))
234         return frozenset(bits)