"""
    The Bloodset auto load/eject 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
from leahi_dialin.protocols       import CAN

# hd Simulator
from leahi_dialin.ui.td_messaging import TD_Messaging

class Loader(DynamicLoader):
    """
    The Bloodset auto load/eject 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
            load_request_message_id = MsgIds.MSG_ID_UI_ADJUST_DISPOSABLES_CONFIRM_REQUEST.value
            self.can_interface.register_receiving_publication_function(channel_id,
                                                                       load_request_message_id,
                                                                       self.handle_load_request)
            eject_request_message_id = MsgIds.MSG_ID_UI_ADJUST_DISPOSABLES_REMOVAL_CONFIRM_REQUEST.value
            self.can_interface.register_receiving_publication_function(channel_id,
                                                                       eject_request_message_id,
                                                                       self.handle_eject_request)

    def _init_loader(self):
        """
        finds and creates widgets
        :return: none
        """
        self.sbLoadReason       = self.find_widget(QtWidgets.QSpinBox               , 'LoadReasonSpinBox'   )
        self.sbEjectReason      = self.find_widget(QtWidgets.QSpinBox               , 'EjectReasonSpinBox'  )

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


    def _init_widgets(self):
        """
        initializes the widgets' properties
        :return: none
        """
        self.sbLoadReason   .setValue(0)
        self.sbEjectReason  .setValue(0)

    @Slot()
    def handle_load_request(self, message, timestamp = 0.0):
        """
        Called when the user requests to firmware from UI
        @return: None
        """
        print(" handle_load_request")
        reason      = self.sbLoadReason.value()
        self.td_interface.td_blood_set_auto_load_response(reason)

    def handle_eject_request(self, message, timestamp = 0.0):
        """
        Called when the user requests to firmware from UI
        @return: None
        """
        print(" handle_eject_request")
        reason      = self.sbEjectReason.value()
        self.td_interface.td_blood_set_auto_eject_response(reason)