###########################################################################
#
# Copyright (c) 2021-2023 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    fans.py
#
# @author  (last)      Dara Navaei
# @date    (last)      27-May-2022
# @author  (original)  Dara Navaei
# @date    (original)  04-Aug-2021
#
############################################################################


import struct
from ..utils.conversions import integer_to_bytearray, float_to_bytearray
from ..utils.checks import check_broadcast_interval_override_ms
from .constants import NO_RESET, RESET
from ..common.msg_defs import MsgIds, MsgFieldPositions
from ..protocols.CAN import (DenaliMessage, DenaliChannels)
from ..utils.base import AbstractSubSystem, publish, DialinEnum
from logging import Logger
from enum import unique


@unique
class HDFansNames(DialinEnum):

    FAN_INLET_1 = 0


class HDFans(AbstractSubSystem):
    """
    @brief Hemodialysis Device (HD) Dialin API sub-class for fans related 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.hd_sync_broadcast_ch_id
            msg_id = MsgIds.MSG_ID_HD_FANS_DATA.value
            self.can_interface.register_receiving_publication_function(channel_id, msg_id, self._handler_fans_sync)

        # Publish variables
        self.duty_cycle = 0.0
        self.target_rpm = 0.0
        self.inlet_1_rpm = 0.0
        self.rpm_alarm_time = 0

    def get_fans_target_duty_cycle(self):
        """
        Gets the fans target duty cycle

        @return: Fans target duty cycle
        """
        return self.duty_cycle

    def get_fan_inlet_1_rpm(self):
        """
        Gets the inlet 1 fan RPM

        @return: Fan inlet 1 RPM
        """
        return self.inlet_1_rpm

    def get_fan_target_rpm(self):
        """
        Gets the fans target RPM

        @return: target RPM
        """
        return self.target_rpm

    def get_fans_time_left_to_rpm_alarm(self):
        """
        Gets the fans time left to RPM alarm

        @return: Fans time left to RPM alarm
        """
        return self.rpm_alarm_time

    @publish(['duty_cycle', 'target_rpm', 'inlet_1_rpm', 'rpm_alarm_time'])
    def _handler_fans_sync(self, message):
        """
        Handles published thermistors message.

        @param message:  published thermistors message
        @return: none
        """
        self.duty_cycle = struct.unpack('f', bytearray(
            message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))[0]
        self.target_rpm = struct.unpack('f', bytearray(
            message['message'][MsgFieldPositions.START_POS_FIELD_2:MsgFieldPositions.END_POS_FIELD_2]))[0]
        self.inlet_1_rpm = struct.unpack('f', bytearray(
            message['message'][MsgFieldPositions.START_POS_FIELD_3:MsgFieldPositions.END_POS_FIELD_3]))[0]
        self.rpm_alarm_time = struct.unpack('i', bytearray(
            message['message'][MsgFieldPositions.START_POS_FIELD_4:MsgFieldPositions.END_POS_FIELD_4]))[0]

    def cmd_fans_rpm_override(self, fan: int, rpm: float, reset: int = NO_RESET) -> int:
        """
        Constructs and sends the HD fan RPM override command
        Constraints:
            Must be logged into HD.

        @param fan:  (int) fan ID that is status is overridden
        @param rpm: (int) RPM that the fan will be overridden to
        @param reset: (int) 1 to reset a previous override, 0 to override
        @return: 1 if successful, zero otherwise
        """
        reset_value = integer_to_bytearray(reset)
        f = integer_to_bytearray(fan)
        r = float_to_bytearray(rpm)
        payload = reset_value + r + f

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

        self.logger.debug("Override fan RPM")

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

        # If there is no content...
        if received_message is not None:

            self.logger.debug("Fan " + str(HDFansNames(fan).name) + " to: " +
                              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_fans_rpm_alarm_start_time_offset(self, time: int) -> int:
        """
        Constructs and sends the HD fan RPM alarm start time offset command
        Constraints:
            Must be logged into HD.

        @param time:  (int) time offset in milliseconds
        @return: 1 if successful, zero otherwise
        """
        payload = integer_to_bytearray(time)

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

        self.logger.debug("Override fan RPM alarm start time offset")

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

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

            self.logger.debug("RPM alarm start time offset set to: " +
                              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_fans_data_broadcast_interval_override(self, ms: int, reset: int = NO_RESET) -> int:
        """
        Constructs and sends the fans data publish interval.
        Constraints:
            Must be logged into HD.
            Given interval must be non-zero and a multiple of the HD general task interval (50 ms).

        @param ms: (int) interval (in ms) to override with
        @param reset: (int) 1 to reset a previous override, 0 to override
        @return: 1 if successful, zero otherwise
        """

        if not check_broadcast_interval_override_ms(ms):
            return False

        rst = integer_to_bytearray(reset)
        mis = integer_to_bytearray(ms)
        payload = rst + mis

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

        self.logger.debug("Override fans data publish interval")

        # 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 = str(mis)
            self.logger.debug(
                "Fans data broadcast interval overridden to " + str_res + " ms: " +
                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_fans_duty_cycle_override(self, duty_cycle: float, reset: int = NO_RESET) -> int:
        """
        Constructs and sends the HD fans duty cycle override command
        Constraints:
            Must be logged into HD.

        @param duty_cycle: (float) the duty cycle that the fans are overridden to
        @param reset: (int) 1 to reset a previous override, 0 to override
        @return: 1 if successful, zero otherwise
        """
        reset_value = integer_to_bytearray(reset)
        dc = float_to_bytearray(duty_cycle / 100.0)
        payload = reset_value + dc

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

        self.logger.debug("Override fans duty cycle")

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

        # If there is no content...
        if received_message is not None:

            self.logger.debug("Set fans duty cycle to: " +
                              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