###########################################################################
#
# Copyright (c) 2020-2023 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    watchdog.py
#
# @author  (last)      Quang Nguyen
# @date    (last)      11-Aug-2021
# @author  (original)  Peter Lucia
# @date    (original)  02-Apr-2020
#
############################################################################
from logging import Logger

from .constants import RESET, NO_RESET
from ..common import MsgIds
from ..protocols.CAN import DenaliMessage, DenaliChannels
from ..utils.base import AbstractSubSystem
from ..utils.conversions import integer_to_bytearray


class HDWatchdog(AbstractSubSystem):
    """
    Hemodialysis Delivery (HD) Dialin API sub-class for watchdog related commands.
    """

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

        @param can_interface: the Denali CAN interface object
        """

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

    def cmd_watchdog_task_check_in_override(self, state: int, task: int, reset: int = NO_RESET) -> int:
        """
        Constructs and sends the watchdog task check-in override command
        Constraints:
            Must be logged into HD.
            Given task must be valid.
            Given state must be a 0 or 1.

        @param state:  integer - 1 for task checked in, 0 for task not checked in
        @param task:  integer - ID of task to override
        @param reset:  integer - 1 to reset a previous override, 0 to override
        @return: 1 if successful, zero otherwise
        """

        rst = integer_to_bytearray(reset)
        sta = integer_to_bytearray(state)
        tsk = integer_to_bytearray(task)
        payload = rst + sta + tsk

        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
                                              message_id=MsgIds.MSG_ID_WATCHDOG_TASK_CHECKIN_OVERRIDE.value,
                                              payload=payload)

        self.logger.debug("override watchdog task check-in state")

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

        # If there is content...
        if received_message is not None:
            # self.logger.debug(received_message)
            if reset == RESET:
                str_res = "reset back to normal"
            else:
                str_res = ("checked in" if state != 0 else "not checked in")
            self.logger.debug("watchdog task check-in overridden to " + str_res + ":" +
                              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