"""
    The Heparin ui loader
"""
# Python
import os
import can
import struct

# Qt
from PySide2                import QtCore, QtWidgets
from PySide2.QtCore         import Slot

# parent
from engine.dynamicloader   import DynamicLoader

# plugin specific
from leahi_dialin.common.msg_defs import MsgIds, MsgFieldPositions
from leahi_dialin.protocols       import CAN
from leahi_dialin.utils           import conversions

# hd Simulator
from leahi_dialin.ui.td_messaging import TD_Messaging

class Loader(DynamicLoader):
    """
    The Heparin ui loader
    """

    def __init__(self):
        self.td_interface = TD_Messaging()
        self.can_interface = self.td_interface.can_interface
        super().__init__(os.path.dirname(__file__))

        if self.can_interface is not None:
            channel_id = CAN.DenaliChannels.ui_to_td_ch_id
            heparin_request_message_id = MsgIds.MSG_ID_TD_HEPARIN_REQUEST.value
            self.can_interface.register_receiving_publication_function(channel_id,
                                                                       heparin_request_message_id,
                                                                       self.handle_heparin_request)
            self.heparin_req.setText("Heparion Req[{0}00]".format(f"0x{heparin_request_message_id:02X}"))


    def _init_loader(self):
        """
        finds and creates widgets
        :return: none
        """
        self.tbSend             = self.find_widget(QtWidgets.QToolButton        , 'tbSend'                  )
        self.sbReason           = self.find_widget(QtWidgets.QSpinBox           , 'HeparinReasonSpinBox'                           )

        self.heparin_req        = self.find_widget(QtWidgets.QLabel             , 'heparin_req'             )

        self.lbHeparin          = self.find_widget(QtWidgets.QLabel             , 'lbHeparin'                )

    def _init_connections(self):
        """
        initializes the widgets connections
        :return: none
        """
        self.tbSend         .clicked     .connect(self.do_send)
        # self.sbSystolic     .valueChanged.connect(self.do_heparin_data)
        # self.sbDiastolic    .valueChanged.connect(self.do_heparin_data)
        # self.sbHeartRate    .valueChanged.connect(self.do_heparin_data)

    def _init_widgets(self):
        """
        initializes the widgets' properties
        :return: none
        """

        # self.sbSystolic     .setValue(120)
        # self.sbDiastolic    .setValue(80)
        # self.sbHeartRate    .setValue(100)
        self.sbReason .setValue(0)

    @Slot()
    def handle_heparin_request(self, message, timestamp = 0.0):
        """
        Called when the user requests to firmware from UI
        @return: None
        """
        message = message['message']
        print(message)
        index = MsgFieldPositions.START_POS_FIELD_1
        state,index = conversions.bytearray_to_integer( message, index)
        print("STATE: ")
        print(state)
        self.lbHeparin .setText( str(state) )

    @Slot()
    def do_heparin_data(self):
        """
        the slot for Vitals Data
        :return: none
        """
        # systolic    = self.sbSystolic   .value()
        # diastolic   = self.sbDiastolic  .value()
        # heartRate   = self.sbHeartRate  .value()

        # self.td_interface.td_heparin(
        #     systolic    ,
        #     diastolic   ,
        #     heartRate      
        # )

    @Slot()
    def do_send(self):
        """
        the slot for treatment set point Data
        :return: none
        """
    #     reason      = self.sbHeparinReason.value()
    #     self.td_interface.td_heparin_adjustment_response(reason)