#!/usr/bin/env python3

import argparse
import asyncio
import queue
from logging import DEBUG, INFO, basicConfig, getLogger
from typing import Optional, Union

import sounddevice as sd
import torch
from whisper import available_models
from whisper.audio import N_FRAMES, SAMPLE_RATE
from whisper.tokenizer import LANGUAGES, TO_LANGUAGE_CODE

from whispering.schema import WhisperConfig
from whispering.serve import serve_with_websocket
from whispering.transcriber import WhisperStreamingTranscriber
from whispering.websocket_client import run_websocket_client

logger = getLogger(__name__)


def transcribe_from_mic(
    *,
    wsp: WhisperStreamingTranscriber,
    sd_device: Optional[Union[int, str]],
    num_block: int,
) -> None:
    q = queue.Queue()

    def sd_callback(indata, frames, time, status):
        if status:
            logger.warning(status)
        q.put(indata.ravel())

    logger.info("Ready to transcribe")
    with sd.InputStream(
        samplerate=SAMPLE_RATE,
        blocksize=N_FRAMES * num_block,
        device=sd_device,
        dtype="float32",
        channels=1,
        callback=sd_callback,
    ):
        idx: int = 0
        while True:
            logger.debug(f"Segment #: {idx}, The rest of queue: {q.qsize()}")
            segment = q.get()
            for chunk in wsp.transcribe(segment=segment):
                print(f"{chunk.start:.2f}->{chunk.end:.2f}\t{chunk.text}")
            idx += 1


def get_opts() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--language",
        type=str,
        default=None,
        choices=sorted(LANGUAGES.keys())
        + sorted([k.title() for k in TO_LANGUAGE_CODE.keys()]),
    )
    parser.add_argument(
        "--model",
        type=str,
        choices=available_models(),
    )
    parser.add_argument(
        "--device",
        default="cuda" if torch.cuda.is_available() else "cpu",
        help="device to use for PyTorch inference",
    )
    parser.add_argument(
        "--beam_size",
        "-b",
        type=int,
        default=5,
    )
    parser.add_argument(
        "--num_block",
        "-n",
        type=int,
        default=160,
        help="Number of operation unit",
    )
    parser.add_argument(
        "--temperature",
        "-t",
        type=float,
        action="append",
        default=[],
    )

    parser.add_argument(
        "--mic",
    )
    parser.add_argument(
        "--debug",
        action="store_true",
    )
    parser.add_argument(
        "--host",
        default="0.0.0.0",
        help="host of websocker server",
    )
    parser.add_argument(
        "--port",
        type=int,
        help="Port number of websocker server",
    )
    parser.add_argument(
        "--allow-padding",
        action="store_true",
    )
    parser.add_argument(
        "--mode",
        choices=["client"],
    )

    return parser.parse_args()


def get_wshiper(*, opts):
    config = WhisperConfig(
        model_name=opts.model,
        language=opts.language,
        device=opts.device,
        beam_size=opts.beam_size,
        temperatures=opts.temperature,
        allow_padding=opts.allow_padding,
    )

    logger.debug(f"WhisperConfig: {config}")
    wsp = WhisperStreamingTranscriber(config=config)
    return wsp


def main() -> None:
    opts = get_opts()
    basicConfig(
        level=DEBUG if opts.debug else INFO,
        format="[%(asctime)s] %(module)s.%(funcName)s:%(lineno)d %(levelname)s -> %(message)s",
    )

    if opts.beam_size <= 0:
        opts.beam_size = None
    if len(opts.temperature) == 0:
        opts.temperature = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0]
    opts.temperature = sorted(set(opts.temperature))

    try:
        opts.mic = int(opts.mic)
    except Exception:
        pass

    if opts.host is not None and opts.port is not None:
        if opts.mode == "client":
            assert opts.language is None
            assert opts.model is None
            asyncio.run(
                run_websocket_client(
                    opts=opts,
                )
            )
        else:
            assert opts.language is not None
            assert opts.model is not None
            wsp = get_wshiper(opts=opts)
            asyncio.run(
                serve_with_websocket(
                    wsp=wsp,
                    host=opts.host,
                    port=opts.port,
                )
            )
    else:
        assert opts.language is not None
        assert opts.model is not None
        wsp = get_wshiper(opts=opts)
        transcribe_from_mic(
            wsp=wsp,
            sd_device=opts.mic,
            num_block=opts.num_block,
        )


if __name__ == "__main__":
    main()