"defines DaemonPlugin base class"
from abc import ABC, abstractmethod
from mycroft_bus_client import Message

class DaemonPlugin(ABC):
    "Abstract class for Plugins to inherit from"

    def __init__(self, daemon):
        self.daemon = daemon
        self.messagebus_client = daemon.messagebus_client
        self.initialize()

    def initialize(self):
        """
        Initialize is called after the plugin object has been created. Add
        any handlers for messagebus_client here
        """

    def emit(self, event, data):
        "Emits a message for OSD frontend"
        self.daemon.emit(event, data)

    def speak(self, utterance):
        "Speaks the given string"
        message = Message("speak", {"utterance": utterance})
        self.messagebus_client.emit(message)

    @abstractmethod
    def check(self, data):
        "Implement the core checks here"