#!/usr/bin/env python

"""
Message sender component.
"""

import logging
import random
import string
import json
from communicator import Communicator

__author__ = "@kovacsbence"
__copyright__ = "Copyright 2020, GoldenPogácsa Team"
__module_name__ = "messagesender"
__version__text__ = "1"

logging.basicConfig(level=logging.INFO)
LOGGER = logging.getLogger(__name__)


class MessageSender:
    """
    Component responsible for sending the messages. Requires an instance of :class:`communicator.Communicator`.
    """

    def __init__(self, communicator: Communicator, uuid: str):
        """**Constructor:**
        Initializes the object.

        :param communicator: an instance of :class:`communicator.Communicator`.
        """
        self.communicator = communicator
        self.uuid = uuid

    def randomstring(self, stringlength: int) -> str:
        """Generate a random string of fixed length

        :param stringlength: the length of the string
        :return: the generated string
        """
        letters = string.ascii_lowercase
        return ''.join(random.choice(letters) for i in range(stringlength))

    def sendmessage(self, message: str = "") -> None:
        """Sends the given message.

        If the message is omitted (empty), then a random message will be generated with length 23 (with
        :func:`messagesender.MessageSender.randomstring`. Calls :func:`communicator.Communicator.sendmessage`
        to send the message.

        :param message: the message of type string that will be sent.
        :return: None
        """
        if not message:
            data = self.randomstring(32)
        else:
            data = message
        self.communicator.sendmessage(json.dumps({"message": data, "uuid": self.uuid}))