import asyncio
import logging
from typing import Optional

import websockets.exceptions

from swiftstory.game import Game
from swiftstory.game_manager import GameManager
from swiftstory.exception import WrongAction, UnsupportedLanguage, JoinError
from swiftstory.player import Player


class Client:
    """ Represent a client.
    A client manages a (web)socket to communicate with the outside world.
    It also manages the associated player when in a game. """
    def __init__(self, socket, game_manager: GameManager) -> None:
        self.game: Optional[Game] = None
        self.game_manager: GameManager = game_manager

        self.socket = socket
        self.player: Optional[Player] = None

    def join_game(self, game_name: str, lang: Optional[str]) -> str:
        if self.game is not None:
            raise WrongAction('You are already in a game')

        if lang is None:
            lang = 'en'

        try:
            game = self.game_manager.find_by_name(game_name, lang)
        except UnsupportedLanguage as e:
            raise JoinError(f"unsupported language: {str(e)}") from e

        self.player = Player()
        status = game.try_join(self.player)
        self.game = game
        self.monitor_player()

        return status

    def play_white_card(self, card_id: int) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_play_card(self.player, card_id)

    def pick_black_card(self) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_become_judge(self.player)

    def collect_cards(self) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_collect_cards(self.player)

    def designate_card(self, card_id: int) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_designate_card(self.player, card_id)

    def view_player_cards(self) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_view_player_cards(self.player)

    def view_played_cards(self) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_view_played_cards(self.player)

    def view_black_card(self) -> str:
        if self.game is None:
            raise WrongAction('You have to join a game first')
        if self.player is None:
            raise ValueError("Player is None")
        return self.game.try_view_black_card(self.player)

    def monitor_player(self) -> None:
        """ Start monitoring the player for notifications and send them. """
        async def f():
            assert self.player is not None
            while True:
                try:
                    notif = await self.player.notifications.get()
                    await self.socket.send(notif)
                except websockets.exceptions.ConnectionClosed:
                    logging.warning("Recipient has disconnected.")

        asyncio.create_task(f())

    def disconnect(self) -> None:
        if self.player is not None:
            if self.game is None:
                raise ValueError("Disconnect from inexistent game.")
            self.game.disconnect(self.player)