import random
import json

from .player import Player
from .map import Map
from .entities import Town


class Game:
    def __init__(self):
        self.players = [Player('P1'), Player('P2')]
        self.map = Map((20, 16))
        self.towns = []
        self.towers = []
        self.mobs = []

    def get_free_positions(self):
        positions = self.map.get_positions()
        positions = positions.difference([el.coords for el in self.towns])
        positions = positions.difference([el.coords for el in self.towers])
        return positions

    def get_random_position(self):
        return random.choice(tuple(self.get_free_positions()))

    def seed_map(self):
        self.towns.append(Town(self.players[0], self.get_random_position()))
        self.towns.append(Town(self.players[1], self.get_random_position()))
        self.towns.append(Town(self.players[0], self.get_random_position()))
        self.towns.append(Town(self.players[1], self.get_random_position()))

    def serialize(self):
        naive = json.loads(json.dumps(self, default=lambda o: o.__dict__))

        def reduce_player(entities):
            for obj in entities:
                obj['player'] = obj['player']['id']

        def make_id_based(entities):
            return {obj['id']: obj for obj in entities}

        for entity_type in ['towns', 'mobs', 'towers']:
            reduce_player(naive[entity_type])
            naive[entity_type] = make_id_based(naive[entity_type])
        naive['players'] = make_id_based(naive['players'])
        return naive