#encoding = utf8
import logging
import queue
from io import BytesIO
from queue import Queue
from threading import Thread, Event


class TTSBase:
    def __init__(self, human):
        self._human = human
        self._thread = None
        self._queue = Queue()
        self._exit_event = None
        self._io_stream = BytesIO()
        self._fps = 50
        self._sample_rate = 16000
        self._chunk = self._sample_rate // self._fps

    def _on_run(self):
        logging.info('tts run')
        while not self._exit_event.is_set():
            try:
                txt = self._queue.get(block=True, timeout=1)
            except queue.Empty:
                continue
            self._request(txt)
        logging.info('tts exit')

    def _request(self, txt):
        pass

    def start(self):
        if self._exit_event is not None:
            return
        self._exit_event = Event()
        self._thread = Thread(target=self._on_run)
        self._thread.start()
        logging.info('tts start')

    def stop(self):
        if self._exit_event is None:
            return

        self._exit_event.set()
        self._thread.join()
        logging.info('tts stop')

    def clear(self):
        self._queue.queue.clear()

    def push_txt(self, txt):
        self._queue.put(txt)