#!/usr/bin/env python3

import asyncio
import sys

from espeak import espeak


class Speaker(object):

    def __init__(self, voice='europe/it'):
        espeak.set_voice(voice)

    def speak(self, number):
        print("Calling %s" % number)
        espeak.synth(number)


class Reader(object):
    """
    """

    def __init__(self):
        self.number = ""
        self.handle = None
        self.speaker = Speaker()

    def read_number(self):
        text = sys.stdin.readline()
        if len(text) == 2 and text[0] in "0123456789":
            self.number += text[0]
            if self.handle:
                self.handle.cancel()
            self.handle = self.loop.call_later(3, self.call_number)
        # TODO: do we want a warning in case we receive something wrong?

    def call_number(self):
        self.speaker.speak(self.number)
        self.number = ""

    def run(self):
        self.loop = asyncio.get_event_loop()
        self.loop.add_reader(sys.stdin, self.read_number)
        try:
            self.loop.run_forever()
        finally:
            self.loop.close()


def main():
    reader = Reader()
    reader.run()

if __name__ == '__main__':
    main()