#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# module CImpulseDecoder
#
#    Copyright (C) 2019  AleaJactaEst
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

import logging
import copy
from tools import CActionFactory

LOGGER='CImpulseDecoder'

class CImpulseDecoder:
    '''
        see : khanat-opennel-code/code/ryzom/client/src/impulse_decoder.cpp
    '''
    def __init__(self, world):
        self.world = world
        self.reset()
        self._CActionFactory = CActionFactory.CActionFactory(world)

    def removeCAction(self, action):
        self._CActionFactory.RegisteredAction[action.Code].append(action)

    def decode(self, msgin, receivedPacket, receivedAck, nextSentPacket):
        '''
            khanat-opennel-code/code/ryzom/client/src/impulse_decoder.cpp:38  void  CImpulseDecoder::decode(CBitMemStream &inbox, TPacketNumber receivedPacket, TPacketNumber receivedAck, TPacketNumber nextSentPacket, vector<CLFECOMMON::CAction *> &actions)
        '''
        logging.getLogger(LOGGER).debug("*" * 80)
        logging.getLogger(LOGGER).debug("receivedPacket:%d receivedAck:%d nextSentPacket:%d" %(receivedPacket, receivedAck, nextSentPacket))
        actions = []
        for level in range(0, 3):
            logging.getLogger(LOGGER).debug("*" * 60)
            if level == 0:
                lAck = self._LastAck0
                channel = 0
            elif level == 1:
                lAck = self._LastAck1
                channel = receivedPacket & 1
            elif level == 2:
                lAck = self._LastAck2
                channel = receivedPacket & 3
            keep = True
            checkOnce = False
            num = 0
            logging.getLogger(LOGGER).debug("level:%d channel:%d lAck:%s" %(level, channel, ':'.join([str(x) for x in lAck])))
            # lastAck = lAck[channel]
            while True:
                logging.getLogger(LOGGER).debug("*" * 40)
                logging.getLogger(LOGGER).debug("[decoded] %s" % msgin.showAllData())
                next = msgin.readBool('next:' + str(level) + ':' + str(channel))
                if not next:
                    break
                if not checkOnce:
                    checkOnce = True
                    keep = receivedAck >= lAck[channel]
                    logging.getLogger(LOGGER).debug("keep:%s [%d => %d]" % (str(keep), receivedAck, lAck[channel]))
                    if keep:
                        lAck[channel] = nextSentPacket
                        logging.getLogger(LOGGER).debug("lAck:%s" % ':'.join([str(x) for x in lAck]))
                num += 1
                action = self._CActionFactory.unpack(msgin)
                if keep:
                    logging.getLogger(LOGGER).debug("keep : %s" % str(action))
                    actions.append(copy.copy(action))
                elif action:
                    logging.getLogger(LOGGER).debug("append : %s" % str(action))
                    self.removeCAction(copy.copy(action))
                logging.getLogger(LOGGER).debug('actions: ' +','.join( [ str(x) for x in actions] ) )
        logging.getLogger(LOGGER).debug("*" * 80)
        return actions

    def reset(self):
        self._LastAck0 = [-1]
        self._LastAck1 = [-1, -1]
        self._LastAck2 = [-1, -1, -1, -1]