#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for managing Quiz game
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from sat.core.i18n import _
from sat.core.constants import Const as C
from sat.core.log import getLogger
log = getLogger(__name__)
from twisted.words.xish import domish
from twisted.internet import reactor
from twisted.words.protocols.jabber import client as jabber_client, jid
from time import time


NS_QG = 'http://www.goffi.org/protocol/quiz'
QG_TAG = 'quiz'

PLUGIN_INFO = {
    C.PI_NAME: "Quiz game plugin",
    C.PI_IMPORT_NAME: "Quiz",
    C.PI_TYPE: "Game",
    C.PI_PROTOCOLS: [],
    C.PI_DEPENDENCIES: ["XEP-0045", "XEP-0249", "ROOM-GAME"],
    C.PI_MAIN: "Quiz",
    C.PI_HANDLER: "yes",
    C.PI_DESCRIPTION: _("""Implementation of Quiz game""")
}


class Quiz(object):

    def inheritFromRoomGame(self, host):
        global RoomGame
        RoomGame = host.plugins["ROOM-GAME"].__class__
        self.__class__ = type(self.__class__.__name__, (self.__class__, RoomGame, object), {})

    def __init__(self, host):
        log.info(_("Plugin Quiz initialization"))
        self.inheritFromRoomGame(host)
        RoomGame._init_(self, host, PLUGIN_INFO, (NS_QG, QG_TAG), game_init={'stage': None}, player_init={'score': 0})
        host.bridge.addMethod("quizGameLaunch", ".plugin", in_sign='asss', out_sign='', method=self._prepareRoom)  # args: players, room_jid, profile
        host.bridge.addMethod("quizGameCreate", ".plugin", in_sign='sass', out_sign='', method=self._createGame)  # args: room_jid, players, profile
        host.bridge.addMethod("quizGameReady", ".plugin", in_sign='sss', out_sign='', method=self._playerReady)  # args: player, referee, profile
        host.bridge.addMethod("quizGameAnswer", ".plugin", in_sign='ssss', out_sign='', method=self.playerAnswer)
        host.bridge.addSignal("quizGameStarted", ".plugin", signature='ssass')  # args: room_jid, referee, players, profile
        host.bridge.addSignal("quizGameNew", ".plugin",
                              signature='sa{ss}s',
                              doc={'summary': 'Start a new game',
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "game_data: data of the game",
                                   'param_2': '%(doc_profile)s'})
        host.bridge.addSignal("quizGameQuestion", ".plugin",
                              signature='sssis',
                              doc={'summary': "Send the current question",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "question_id: question id",
                                   'param_2': "question: question to ask",
                                   'param_3': "timer: timer",
                                   'param_4': '%(doc_profile)s'})
        host.bridge.addSignal("quizGamePlayerBuzzed", ".plugin",
                              signature='ssbs',
                              doc={'summary': "A player just pressed the buzzer",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "player: player who pushed the buzzer",
                                   'param_2': "pause: should the game be paused ?",
                                   'param_3': '%(doc_profile)s'})
        host.bridge.addSignal("quizGamePlayerSays", ".plugin",
                              signature='sssis',
                              doc={'summary': "A player just pressed the buzzer",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "player: player who pushed the buzzer",
                                   'param_2': "text: what the player say",
                                   'param_3': "delay: how long, in seconds, the text must appear",
                                   'param_4': '%(doc_profile)s'})
        host.bridge.addSignal("quizGameAnswerResult", ".plugin",
                              signature='ssba{si}s',
                              doc={'summary': "Result of the just given answer",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "player: player who gave the answer",
                                   'param_2': "good_answer: True if the answer is right",
                                   'param_3': "score: dict of score with player as key",
                                   'param_4': '%(doc_profile)s'})
        host.bridge.addSignal("quizGameTimerExpired", ".plugin",
                              signature='ss',
                              doc={'summary': "Nobody answered the question in time",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': '%(doc_profile)s'})
        host.bridge.addSignal("quizGameTimerRestarted", ".plugin",
                              signature='sis',
                              doc={'summary': "Nobody answered the question in time",
                                   'param_0': "room_jid: jid of game's room",
                                   'param_1': "time_left: time left before timer expiration",
                                   'param_2': '%(doc_profile)s'})

    def __game_data_to_xml(self, game_data):
        """Convert a game data dict to domish element"""
        game_data_elt = domish.Element((None, 'game_data'))
        for data in game_data:
            data_elt = domish.Element((None, data))
            data_elt.addContent(game_data[data])
            game_data_elt.addChild(data_elt)
        return game_data_elt

    def __xml_to_game_data(self, game_data_elt):
        """Convert a domish element with game_data to a dict"""
        game_data = {}
        for data_elt in game_data_elt.elements():
            game_data[data_elt.name] = unicode(data_elt)
        return game_data

    def __answer_result_to_signal_args(self, answer_result_elt):
        """Parse answer result element and return a tuple of signal arguments
        @param answer_result_elt: answer result element
        @return: (player, good_answer, score)"""
        score = {}
        for score_elt in answer_result_elt.elements():
            score[score_elt['player']] = int(score_elt['score'])
        return (answer_result_elt['player'], answer_result_elt['good_answer'] == str(True), score)

    def __answer_result(self, player_answering, good_answer, game_data):
        """Convert a domish an answer_result element
        @param player_answering: player who gave the answer
        @param good_answer: True is the answer is right
        @param game_data: data of the game"""
        players_data = game_data['players_data']
        score = {}
        for player in game_data['players']:
            score[player] = players_data[player]['score']

        answer_result_elt = domish.Element((None, 'answer_result'))
        answer_result_elt['player'] = player_answering
        answer_result_elt['good_answer'] = str(good_answer)

        for player in score:
            score_elt = domish.Element((None, "score"))
            score_elt['player'] = player
            score_elt['score'] = str(score[player])
            answer_result_elt.addChild(score_elt)

        return answer_result_elt

    def __ask_question(self, question_id, question, timer):
        """Create a element for asking a question"""
        question_elt = domish.Element((None, 'question'))
        question_elt['id'] = question_id
        question_elt['timer'] = str(timer)
        question_elt.addContent(question)
        return question_elt

    def __start_play(self, room_jid, game_data, profile):
        """Start the game (tell to the first player after dealer to play"""
        client = self.host.getClient(profile)
        game_data['stage'] = "play"
        next_player_idx = game_data['current_player'] = (game_data['init_player'] + 1) % len(game_data['players'])  # the player after the dealer start
        game_data['first_player'] = next_player = game_data['players'][next_player_idx]
        to_jid = jid.JID(room_jid.userhost() + "/" + next_player)
        mess = self.createGameElt(to_jid)
        mess.firstChildElement().addElement('your_turn')
        client.send(mess)

    def playerAnswer(self, player, referee, answer, profile_key=C.PROF_KEY_NONE):
        """Called when a player give an answer"""
        client = self.host.getClient(profile_key)
        log.debug(u'new player answer (%(profile)s): %(answer)s' % {'profile': client.profile, 'answer': answer})
        mess = self.createGameElt(jid.JID(referee))
        answer_elt = mess.firstChildElement().addElement('player_answer')
        answer_elt['player'] = player
        answer_elt.addContent(answer)
        client.send(mess)

    def timerExpired(self, room_jid, profile):
        """Called when nobody answered the question in time"""
        client = self.host.getClient(profile)
        game_data = self.games[room_jid]
        game_data['stage'] = 'expired'
        mess = self.createGameElt(room_jid)
        mess.firstChildElement().addElement('timer_expired')
        client.send(mess)
        reactor.callLater(4, self.askQuestion, room_jid, client.profile)

    def pauseTimer(self, room_jid):
        """Stop the timer and save the time left"""
        game_data = self.games[room_jid]
        left = max(0, game_data["timer"].getTime() - time())
        game_data['timer'].cancel()
        game_data['time_left'] = int(left)
        game_data['previous_stage'] = game_data['stage']
        game_data['stage'] = "paused"

    def restartTimer(self, room_jid, profile):
        """Restart a timer with the saved time"""
        client = self.host.getClient(profile)
        game_data = self.games[room_jid]
        assert game_data['time_left'] is not None
        mess = self.createGameElt(room_jid)
        mess.firstChildElement().addElement('timer_restarted')
        jabber_client.restarted_elt["time_left"] = str(game_data['time_left'])
        client.send(mess)
        game_data["timer"] = reactor.callLater(game_data['time_left'], self.timerExpired, room_jid, profile)
        game_data["time_left"] = None
        game_data['stage'] = game_data['previous_stage']
        del game_data['previous_stage']

    def askQuestion(self, room_jid, profile):
        """Ask a new question"""
        client = self.host.getClient(profile)
        game_data = self.games[room_jid]
        game_data['stage'] = "question"
        game_data['question_id'] = "1"
        timer = 30
        mess = self.createGameElt(room_jid)
        mess.firstChildElement().addChild(self.__ask_question(game_data['question_id'], u"Quel est l'âge du capitaine ?", timer))
        client.send(mess)
        game_data["timer"] = reactor.callLater(timer, self.timerExpired, room_jid, profile)
        game_data["time_left"] = None

    def checkAnswer(self, room_jid, player, answer, profile):
        """Check if the answer given is right"""
        client = self.host.getClient(profile)
        game_data = self.games[room_jid]
        players_data = game_data['players_data']
        good_answer = game_data['question_id'] == "1" and answer == "42"
        players_data[player]['score'] += 1 if good_answer else -1
        players_data[player]['score'] = min(9, max(0, players_data[player]['score']))

        mess = self.createGameElt(room_jid)
        mess.firstChildElement().addChild(self.__answer_result(player, good_answer, game_data))
        client.send(mess)

        if good_answer:
            reactor.callLater(4, self.askQuestion, room_jid, profile)
        else:
            reactor.callLater(4, self.restartTimer, room_jid, profile)

    def newGame(self, room_jid, profile):
        """Launch a new round"""
        common_data = {'game_score': 0}
        new_game_data = {"instructions": _(u"""Bienvenue dans cette partie rapide de quizz, le premier à atteindre le score de 9 remporte le jeu

Attention, tu es prêt ?""")}
        msg_elts = self.__game_data_to_xml(new_game_data)
        RoomGame.newRound(self, room_jid, (common_data, msg_elts), profile)
        reactor.callLater(10, self.askQuestion, room_jid, profile)

    def room_game_cmd(self, mess_elt, profile):
        client = self.host.getClient(profile)
        from_jid = jid.JID(mess_elt['from'])
        room_jid = jid.JID(from_jid.userhost())
        game_elt = mess_elt.firstChildElement()
        game_data = self.games[room_jid]
        # if 'players_data' in game_data:
        #     players_data = game_data['players_data']

        for elt in game_elt.elements():

            if elt.name == 'started':  # new game created
                players = []
                for player in elt.elements():
                    players.append(unicode(player))
                self.host.bridge.quizGameStarted(room_jid.userhost(), from_jid.full(), players, profile)

            elif elt.name == 'player_ready':  # ready to play
                player = elt['player']
                status = self.games[room_jid]['status']
                nb_players = len(self.games[room_jid]['players'])
                status[player] = 'ready'
                log.debug(_(u'Player %(player)s is ready to start [status: %(status)s]') % {'player': player, 'status': status})
                if status.values().count('ready') == nb_players:  # everybody is ready, we can start the game
                    self.newGame(room_jid, profile)

            elif elt.name == 'game_data':
                self.host.bridge.quizGameNew(room_jid.userhost(), self.__xml_to_game_data(elt), profile)

            elif elt.name == 'question':  # A question is asked
                self.host.bridge.quizGameQuestion(room_jid.userhost(), elt["id"], unicode(elt), int(elt["timer"]), profile)

            elif elt.name == 'player_answer':
                player = elt['player']
                pause = game_data['stage'] == 'question'  # we pause the game only if we are have a question at the moment
                # we first send a buzzer message
                mess = self.createGameElt(room_jid)
                buzzer_elt = mess.firstChildElement().addElement('player_buzzed')
                buzzer_elt['player'] = player
                buzzer_elt['pause'] = str(pause)
                client.send(mess)
                if pause:
                    self.pauseTimer(room_jid)
                    # and we send the player answer
                    mess = self.createGameElt(room_jid)
                    _answer = unicode(elt)
                    say_elt = mess.firstChildElement().addElement('player_says')
                    say_elt['player'] = player
                    say_elt.addContent(_answer)
                    say_elt['delay'] = "3"
                    reactor.callLater(2, client.send, mess)
                    reactor.callLater(6, self.checkAnswer, room_jid, player, _answer, profile=profile)

            elif elt.name == 'player_buzzed':
                self.host.bridge.quizGamePlayerBuzzed(room_jid.userhost(), elt["player"], elt['pause'] == str(True), profile)

            elif elt.name == 'player_says':
                self.host.bridge.quizGamePlayerSays(room_jid.userhost(), elt["player"], unicode(elt), int(elt["delay"]), profile)

            elif elt.name == 'answer_result':
                player, good_answer, score = self.__answer_result_to_signal_args(elt)
                self.host.bridge.quizGameAnswerResult(room_jid.userhost(), player, good_answer, score, profile)

            elif elt.name == 'timer_expired':
                self.host.bridge.quizGameTimerExpired(room_jid.userhost(), profile)

            elif elt.name == 'timer_restarted':
                self.host.bridge.quizGameTimerRestarted(room_jid.userhost(), int(elt['time_left']), profile)

            else:
                log.error(_(u'Unmanaged game element: %s') % elt.name)