"""
    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 ui loader class

    """

    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
            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.btnAutoEject               = self.find_widget(QtWidgets.QPushButton, 'btnAutoEjectSend'        )
        self.spnAutoEjectRejectReason   = self.find_widget(QtWidgets.QSpinBox   , 'spnEjectReasonSpinBox'   )
        self.lbAutoEject                = self.find_widget(QtWidgets.QLabel     , 'lbAutoEject'             )


    def _init_connections(self):
        """
        initializes the widgets connections
        :return: none
        """
        self.btnAutoEject        .clicked.connect(self.do_auto_eject)

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

        
    @Slot()
    def do_auto_eject(self):
        reason      = self.spnAutoEjectRejectReason.value()
        self.td_interface.td_blood_set_auto_eject_response(reason)
        self.lbAutoEject.setText("-")
    
    @Slot()
    def handle_eject_request(self, message, timestamp = 0.0):
        """
        Called when the user requests to firmware from UI
        @return: None
        """
        self.lbAutoEject.setText("Requested")