"""
    The TD Water Sample ui loader
"""
# Python
import os

# 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 TD Water Sample ui loader
    """

    def __init__(self):
        self.td_interface = TD_Messaging()
        self.can_interface = self.td_interface.can_interface
        super().__init__(os.path.dirname(__file__))
        self.index = 0

        if self.can_interface is not None:
            channel_id                  = CAN.DenaliChannels.ui_to_td_ch_id
            request_message_id          = MsgIds.MSG_ID_UI_WATER_SAMPLE_RESULT_REQUEST.value
            self.can_interface.register_receiving_publication_function(channel_id,
                                                                       request_message_id,
                                                                       self.handle_request)
  

    def _init_loader(self):
        """
        finds and creates widgets
        :return: none
        """
        self.lbWaterSampleResult        = self.find_widget(QtWidgets.QLabel ,   'lbWaterSampleResult'       )


    def _init_connections(self):
        """
        initializes the widgets connections
        :return: none
        """


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


    @Slot()
    def handle_request(self, message, timestamp = 0.0):
        """
        the slot for Valve data change
        :return: none
        """
        message = message['message']
        index = MsgFieldPositions.START_POS_FIELD_1
        val,index = conversions.bytearray_to_integer( message, index)
        self.lbWaterSampleResult.setText("Fail" if val == 0 else "Pass")