###########################################################################
#
# Copyright (c) 2019-2021 Diality Inc. - All Rights Reserved.
#
# THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
# WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
#
# @file    rtc.py
#
# @author  (last)      Dara Navaei
# @date    (last)      10-Nov-2021
# @author  (original)  Quang Nguyen
# @date    (original)  13-May-2021
#
############################################################################
import struct
from ..common.msg_defs import MsgIds, MsgFieldPositions
from logging import Logger

from ..common.msg_defs import MsgIds
from ..protocols.CAN import DenaliMessage, DenaliChannels
from ..utils.base import AbstractSubSystem, publish
from ..utils.conversions import integer_to_bytearray


class DGRTC(AbstractSubSystem):
    """

    Dialysate Generator (DG) Dialin API sub-class for rtc commands.

    """

    def __init__(self, can_interface, logger: Logger):
        """

        @param can_interface: Denali Can Messenger object
        """

        super().__init__()
        self.can_interface = can_interface
        self.logger = logger

        if self.can_interface is not None:
            channel_id = DenaliChannels.dg_sync_broadcast_ch_id
            msg_id = MsgIds.MSG_ID_RTC_EPOCH.value
            self.can_interface.register_receiving_publication_function(channel_id, msg_id, self._handler_rtc_epoch)
        self.rtc_epoch = 0

    def get_rtc_epoch(self):
        """
        Gets the rtc epoch

        @return: The rtc epoch
        """
        return self.rtc_epoch

    @publish(["rtc_epoch"])
    def _handler_rtc_epoch(self, message):
        """
        Publishes the rtc time in epoch

        @param message:  published rtc epoch message
        @return: None
        """
        epoch = struct.unpack('i', bytearray(
            message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))[0]
        self.rtc_epoch = epoch

    def cmd_stop_rtc(self):
        """
        Stops the DG RTC clock

        @return: None
        """

        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dg_ch_id,
                                              message_id=MsgIds.MSG_ID_DG_STOP_RTC_CLOCK.value)

        self.logger.debug("Stopping the DG RTC")

        # Send message
        received_message = self.can_interface.send(message)

        # If there is content...
        if received_message is not None:

            self.logger.debug(received_message)
            self.logger.debug("RTC stop command was sent" +
                str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
            # response payload is OK or not OK
            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
        else:
            self.logger.debug("Timeout!!!!")
            return False

    def cmd_set_rtc_time_and_date(self, second: int, minute: int, hour: int, day: int, month: int, year: int) -> int:
        """
        Sets the RTC time and date with the provided date and time

        @param second: (int) Second
        @param minute:  (int) Minute
        @param hour:  (int) Hour
        @param day: (int) Day
        @param month: (int) Month
        @param year: (int) Year
        @return: 1 if Successful, False otherwise
        """
        sec = bytes([second])
        mint = bytes([minute])
        hour = bytes([hour])
        day = bytes([day])
        month = bytes([month])
        year = integer_to_bytearray(year)
        payload = sec + mint + hour + day + month + year

        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dg_ch_id,
                                              message_id=MsgIds.MSG_ID_DG_SET_RTC_DATE_TIME.value,
                                              payload=payload)

        self.logger.debug("Setting time and date to rtc")

        # Send message
        received_message = self.can_interface.send(message)

        # If there is content...
        if received_message is not None:

            self.logger.debug(received_message)
            self.logger.debug(
                "Time and Date in rtc set to seconds: " + str(sec) + " minutes: " + str(min) + " hours: " +
                str(hour) + " days: " + str(day) + " months: " + str(month) + " years: " + str(year) +
                str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
            # response payload is OK or not OK
            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
        else:
            self.logger.debug("Timeout!!!!")
            return False