Byted Podcast Gen

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websockets>=12.0

import json
import os
import urllib.error
import urllib.request
from urllib.parse import parse_qsl, urlencode, urlparse, urlunparse


def _build_action_url(base: str, action: str, version: str = "2025-05-20") -> str:
    base = (base or "").strip()
    if not base:
        return ""
    parsed = urlparse(base)
    path = parsed.path or "/"
    if not path.endswith("/"):
        path = f"{path}/"
    query = dict(parse_qsl(parsed.query))
    query["Action"] = action
    query["Version"] = version
    return urlunparse(parsed._replace(path=path, query=urlencode(query)))


def _extract_json(text: str) -> dict | None:
    if not text:
        return None
    text = text.strip()
    try:
        return json.loads(text)
    except Exception:
        pass
    start = text.find("{")
    end = text.rfind("}")
    if start == -1 or end == -1 or end <= start:
        return None
    try:
        return json.loads(text[start : end + 1])
    except Exception:
        return None


def _post_json(
    url: str, headers: dict, payload: dict, timeout_s: int = 15
) -> dict | None:
    if not url:
        return None
    data = json.dumps(payload, ensure_ascii=False).encode("utf-8")
    req = urllib.request.Request(url, data=data, method="POST")
    for k, v in (headers or {}).items():
        if v is None:
            continue
        req.add_header(k, v)
    try:
        with urllib.request.urlopen(req, timeout=timeout_s) as resp:
            body = resp.read().decode("utf-8", errors="replace")
            return _extract_json(body)
    except urllib.error.HTTPError as e:
        try:
            body = e.read().decode("utf-8", errors="replace")
            return _extract_json(body)
        except Exception:
            return None
    except Exception:
        return None


def _dotenv_path() -> str:
    return os.path.join(os.path.dirname(os.path.abspath(__file__)), ".env")


def _load_dotenv_if_available(dotenv_path: str) -> None:
    try:
        from dotenv import load_dotenv  # type: ignore
    except Exception:
        return
    try:
        load_dotenv(dotenv_path=dotenv_path, override=False)
    except Exception:
        return


def _persist_env_to_dotenv_if_available(dotenv_path: str, key: str, value: str) -> None:
    value = (value or "").strip()
    if not value:
        return
    try:
        from dotenv import set_key  # type: ignore
    except Exception:
        return
    try:
        os.makedirs(os.path.dirname(dotenv_path) or ".", exist_ok=True)
        set_key(dotenv_path, key, value, quote_mode="never")
        try:
            os.chmod(dotenv_path, 0o600)
        except Exception:
            pass
    except Exception:
        return


def get_speech_api_key(
    project_name: str = "default", create_name: str = "arkclaw"
) -> str:
    _load_dotenv_if_available(_dotenv_path())

    speech_key = os.getenv("MODEL_SPEECH_API_KEY", "").strip()
    if speech_key:
        return speech_key

    ark_key = os.getenv("ARK_SKILL_API_KEY", "").strip()
    base = os.getenv("ARK_SKILL_API_BASE", "").strip()
    if not ark_key or not base:
        return ""

    headers = {
        "ServiceName": "speech_saas_prod",
        "Authorization": f"Bearer {ark_key}",
        "Content-Type": "application/json",
    }

    list_url = _build_action_url(base, "ListAPIKeys")
    list_data = _post_json(
        list_url,
        headers=headers,
        payload={"ProjectName": project_name, "OnlyAvailable": True},
    )
    if isinstance(list_data, dict):
        api_keys = (list_data.get("Result") or {}).get("APIKeys") or []
        if isinstance(api_keys, list) and api_keys:
            first = api_keys[0] if isinstance(api_keys[0], dict) else {}
            first_key = (first.get("APIKey") or "").strip()
            if first_key:
                os.environ["MODEL_SPEECH_API_KEY"] = first_key
                _persist_env_to_dotenv_if_available(
                    _dotenv_path(), "MODEL_SPEECH_API_KEY", first_key
                )
                return first_key

    create_url = _build_action_url(base, "CreateAPIKey")
    create_data = _post_json(
        create_url,
        headers=headers,
        payload={"ProjectName": project_name, "Name": create_name},
    )
    if isinstance(create_data, dict):
        created_key = ((create_data.get("Result") or {}).get("APIKey") or "").strip()
        if created_key:
            os.environ["MODEL_SPEECH_API_KEY"] = created_key
            _persist_env_to_dotenv_if_available(
                _dotenv_path(), "MODEL_SPEECH_API_KEY", created_key
            )
            return created_key

    return ""

# -*- coding: utf-8 -*-
import argparse
import asyncio
import json
import logging
import os
import sys
import uuid

import websockets
from api_key import get_speech_api_key
from protocols import finish_connection  # noqa: E402
from protocols import (
    EventType,
    MsgType,
    finish_session,
    receive_message,
    start_connection,
    start_session,
    wait_for_event,
)

_SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
if _SCRIPT_DIR not in sys.path:
    sys.path.insert(0, _SCRIPT_DIR)

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("PodcastTTS")

ENDPOINT = "wss://openspeech.bytedance.com/api/v3/sami/podcasttts"


def _load_json_value(value: str):
    if value is None:
        return None
    value = value.strip()
    if not value:
        return None
    if os.path.exists(value):
        with open(value, "r", encoding="utf-8") as f:
            return json.load(f)
    return json.loads(value)


def _output_dir_from_output_path(output_path: str) -> str:
    if output_path:
        d = os.path.dirname(output_path)
        return d if d else "output"
    return "output"


def _final_extension(encoding: str) -> str:
    return "ogg" if encoding == "ogg_opus" else encoding


async def _generate(args) -> dict:
    api_key = get_speech_api_key()
    if not api_key:
        raise ValueError("Missing MODEL_SPEECH_API_KEY")
    resource_id = "volc.service_type.10050"
    endpoint = ENDPOINT
    return_audio_url = True
    skip_round_audio_save = True

    if args.action == 0 and not (args.text or args.input_url):
        raise ValueError("action=0 requires --text or --input_url")
    if args.action == 3 and not args.nlp_texts:
        raise ValueError("action=3 requires --nlp_texts")
    if args.action == 4 and not args.prompt_text:
        raise ValueError("action=4 requires --prompt_text")

    headers = {
        "X-Api-Key": api_key,
        "X-Api-Resource-Id": resource_id,
        "X-Api-Connect-Id": str(uuid.uuid4()),
    }

    output_dir = _output_dir_from_output_path(args.output)
    os.makedirs(output_dir, exist_ok=True)

    session_id = str(uuid.uuid4())

    speaker_info = _load_json_value(args.speaker_info) if args.speaker_info else None
    nlp_texts = _load_json_value(args.nlp_texts) if args.nlp_texts else None

    req_params = {
        "input_id": args.input_id,
        "input_text": args.text,
        "nlp_texts": nlp_texts,
        "prompt_text": args.prompt_text,
        "action": args.action,
        "use_head_music": args.use_head_music,
        "use_tail_music": args.use_tail_music,
        "aigc_watermark": args.aigc_watermark,
        "input_info": {
            "input_url": args.input_url,
            "return_audio_url": return_audio_url,
            "only_nlp_text": args.only_nlp_text,
        },
        "speaker_info": speaker_info,
        "audio_config": {
            "format": args.encoding,
            "sample_rate": 24000,
            "speech_rate": 0,
        },
    }

    podcast_audio = bytearray()
    round_audio = bytearray()
    podcast_texts = []
    audio_received = False
    current_round = 0
    current_speaker = "speaker"
    podcast_end_payload = None

    async with websockets.connect(endpoint, additional_headers=headers) as websocket:
        await start_connection(websocket)
        await wait_for_event(
            websocket, MsgType.FullServerResponse, EventType.ConnectionStarted
        )

        await start_session(
            websocket,
            json.dumps(req_params, ensure_ascii=False).encode("utf-8"),
            session_id,
        )
        await wait_for_event(
            websocket, MsgType.FullServerResponse, EventType.SessionStarted
        )
        await finish_session(websocket, session_id)

        while True:
            msg = await receive_message(websocket)

            if (
                msg.type == MsgType.AudioOnlyServer
                and msg.event == EventType.PodcastRoundResponse
            ):
                if msg.payload:
                    audio_received = True
                    round_audio.extend(msg.payload)
                continue

            if msg.type == MsgType.Error:
                raise RuntimeError(msg.payload.decode("utf-8", errors="replace"))

            if msg.type == MsgType.FullServerResponse:
                if msg.event == EventType.PodcastRoundStart:
                    data = json.loads(msg.payload.decode("utf-8", errors="replace"))
                    if data.get("text"):
                        podcast_texts.append(
                            {"text": data.get("text"), "speaker": data.get("speaker")}
                        )
                    current_speaker = data.get("speaker") or "speaker"
                    current_round = (
                        data.get("round_id") if data.get("round_id") is not None else 0
                    )
                    continue

                if msg.event == EventType.PodcastRoundEnd:
                    data = json.loads(msg.payload.decode("utf-8", errors="replace"))
                    if data.get("is_error"):
                        raise RuntimeError(json.dumps(data, ensure_ascii=False))
                    if round_audio:
                        if not skip_round_audio_save:
                            round_path = os.path.join(
                                output_dir,
                                f"{current_speaker}_{current_round}.{_final_extension(args.encoding)}",
                            )
                            with open(round_path, "wb") as f:
                                f.write(round_audio)
                        podcast_audio.extend(round_audio)
                        round_audio.clear()
                    continue

                if msg.event == EventType.PodcastEnd:
                    podcast_end_payload = json.loads(
                        msg.payload.decode("utf-8", errors="replace")
                    )
                    continue

            if msg.event == EventType.SessionFinished:
                break

        await finish_connection(websocket)
        await wait_for_event(
            websocket, MsgType.FullServerResponse, EventType.ConnectionFinished
        )

    result = {"status": "success", "task_id": session_id, "encoding": args.encoding}

    if podcast_texts:
        result["texts"] = json.dumps(podcast_texts, ensure_ascii=False, indent=2)

    if args.only_nlp_text:
        return result

    if not audio_received:
        raise RuntimeError("No audio data received")

    if podcast_audio:
        audio_path = args.output or os.path.join(
            output_dir, f"podcast_{session_id}.{_final_extension(args.encoding)}"
        )
        with open(audio_path, "wb") as f:
            f.write(podcast_audio)
        result["audio_path"] = audio_path

    if return_audio_url and isinstance(podcast_end_payload, dict):
        audio_url = podcast_end_payload.get("meta_info", {}).get("audio_url")
        if audio_url:
            result["audio_url"] = audio_url

    return result


def _build_parser() -> argparse.ArgumentParser:
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--action", default=4, type=int, choices=[0, 3, 4], help="Podcast type"
    )
    parser.add_argument("--text", default="", help="Input text (action=0)")
    parser.add_argument("--input_url", default="", help="Input text URL (action=0)")
    parser.add_argument(
        "--nlp_texts",
        default="",
        help="NLP texts JSON string or JSON file path (action=3)",
    )
    parser.add_argument("--prompt_text", default="", help="Prompt text (action=4)")

    parser.add_argument(
        "--encoding",
        default="mp3",
        choices=["mp3", "wav", "ogg_opus"],
        help="Audio format",
    )
    parser.add_argument(
        "--input_id", default="podcast_input", help="Unique input identifier"
    )
    parser.add_argument(
        "--speaker_info", default='{"random_order":false}', help="Speaker info JSON"
    )

    parser.add_argument(
        "--use_head_music", action="store_true", help="Enable head music"
    )
    parser.add_argument(
        "--use_tail_music", action="store_true", help="Enable tail music"
    )
    parser.add_argument(
        "--aigc_watermark", action="store_true", help="Enable aigc watermark"
    )
    parser.add_argument(
        "--only_nlp_text", action="store_true", help="Only output podcast texts"
    )

    parser.add_argument("--output", default="", help="Final audio output path")
    parser.add_argument("--texts_output", default="", help="Podcast texts output path")
    return parser


def main() -> int:
    args = _build_parser().parse_args()
    try:
        result = asyncio.run(_generate(args))
        print(json.dumps(result, ensure_ascii=False))
        return 0
    except Exception as e:
        print(json.dumps({"status": "error", "error": str(e)}, ensure_ascii=False))
        return 1


if __name__ == "__main__":
    raise SystemExit(main())

from .protocols import (
    CompressionBits,
    EventType,
    HeaderSizeBits,
    Message,
    MsgType,
    MsgTypeFlagBits,
    SerializationBits,
    VersionBits,
    audio_only_client,
    cancel_session,
    finish_connection,
    finish_session,
    full_client_request,
    receive_message,
    start_connection,
    start_session,
    task_request,
    wait_for_event,
)

__all__ = [
    "CompressionBits",
    "EventType",
    "HeaderSizeBits",
    "Message",
    "MsgType",
    "MsgTypeFlagBits",
    "SerializationBits",
    "VersionBits",
    "audio_only_client",
    "cancel_session",
    "finish_connection",
    "finish_session",
    "full_client_request",
    "receive_message",
    "start_connection",
    "start_session",
    "task_request",
    "wait_for_event",
]

import io
import logging
import struct
from dataclasses import dataclass
from enum import IntEnum
from typing import Callable, List

import websockets

logger = logging.getLogger(__name__)


class MsgType(IntEnum):
    """Message type enumeration"""

    Invalid = 0
    FullClientRequest = 0b1
    AudioOnlyClient = 0b10
    FullServerResponse = 0b1001
    AudioOnlyServer = 0b1011
    FrontEndResultServer = 0b1100
    Error = 0b1111

    # Alias
    ServerACK = AudioOnlyServer

    def __str__(self) -> str:
        return self.name if self.name else f"MsgType({self.value})"


class MsgTypeFlagBits(IntEnum):
    """Message type flag bits"""

    NoSeq = 0  # Non-terminal packet with no sequence
    PositiveSeq = 0b1  # Non-terminal packet with sequence > 0
    LastNoSeq = 0b10  # Last packet with no sequence
    NegativeSeq = 0b11  # Last packet with sequence < 0
    WithEvent = 0b100  # Payload contains event number (int32)


class VersionBits(IntEnum):
    """Version bits"""

    Version1 = 1
    Version2 = 2
    Version3 = 3
    Version4 = 4


class HeaderSizeBits(IntEnum):
    """Header size bits"""

    HeaderSize4 = 1
    HeaderSize8 = 2
    HeaderSize12 = 3
    HeaderSize16 = 4


class SerializationBits(IntEnum):
    """Serialization method bits"""

    Raw = 0
    JSON = 0b1
    Thrift = 0b11
    Custom = 0b1111


class CompressionBits(IntEnum):
    """Compression method bits"""

    None_ = 0
    Gzip = 0b1
    Custom = 0b1111


class EventType(IntEnum):
    """Event type enumeration"""

    None_ = 0  # Default event

    # 1 ~ 49 Upstream Connection events
    StartConnection = 1
    StartTask = 1  # Alias of StartConnection
    FinishConnection = 2
    FinishTask = 2  # Alias of FinishConnection

    # 50 ~ 99 Downstream Connection events
    ConnectionStarted = 50  # Connection established successfully
    TaskStarted = 50  # Alias of ConnectionStarted
    ConnectionFailed = 51  # Connection failed (possibly due to authentication failure)
    TaskFailed = 51  # Alias of ConnectionFailed
    ConnectionFinished = 52  # Connection ended
    TaskFinished = 52  # Alias of ConnectionFinished

    # 100 ~ 149 Upstream Session events
    StartSession = 100
    CancelSession = 101
    FinishSession = 102

    # 150 ~ 199 Downstream Session events
    SessionStarted = 150
    SessionCanceled = 151
    SessionFinished = 152
    SessionFailed = 153
    UsageResponse = 154  # Usage response
    ChargeData = 154  # Alias of UsageResponse

    # 200 ~ 249 Upstream general events
    TaskRequest = 200
    UpdateConfig = 201

    # 250 ~ 299 Downstream general events
    AudioMuted = 250

    # 300 ~ 349 Upstream TTS events
    SayHello = 300

    # 350 ~ 399 Downstream TTS events
    TTSSentenceStart = 350
    TTSSentenceEnd = 351
    TTSResponse = 352
    TTSEnded = 359
    PodcastRoundStart = 360
    PodcastRoundResponse = 361
    PodcastRoundEnd = 362
    PodcastEnd = 363

    # 450 ~ 499 Downstream ASR events
    ASRInfo = 450
    ASRResponse = 451
    ASREnded = 459

    # 500 ~ 549 Upstream dialogue events
    ChatTTSText = 500  # (Ground-Truth-Alignment) text for speech synthesis

    # 550 ~ 599 Downstream dialogue events
    ChatResponse = 550
    ChatEnded = 559

    # 650 ~ 699 Downstream dialogue events
    # Events for source (original) language subtitle
    SourceSubtitleStart = 650
    SourceSubtitleResponse = 651
    SourceSubtitleEnd = 652
    # Events for target (translation) language subtitle
    TranslationSubtitleStart = 653
    TranslationSubtitleResponse = 654
    TranslationSubtitleEnd = 655

    def __str__(self) -> str:
        return self.name if self.name else f"EventType({self.value})"


@dataclass
class Message:
    """Message object

    Message format:
    0                 1                 2                 3
    | 0 1 2 3 4 5 6 7 | 0 1 2 3 4 5 6 7 | 0 1 2 3 4 5 6 7 | 0 1 2 3 4 5 6 7 |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |    Version      |   Header Size   |     Msg Type    |      Flags      |
    |   (4 bits)      |    (4 bits)     |     (4 bits)    |     (4 bits)    |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    | Serialization   |   Compression   |           Reserved                |
    |   (4 bits)      |    (4 bits)     |           (8 bits)                |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                                                                       |
    |                   Optional Header Extensions                          |
    |                     (if Header Size > 1)                              |
    |                                                                       |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |                                                                       |
    |                           Payload                                     |
    |                      (variable length)                                |
    |                                                                       |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    """

    version: VersionBits = VersionBits.Version1
    header_size: HeaderSizeBits = HeaderSizeBits.HeaderSize4
    type: MsgType = MsgType.Invalid
    flag: MsgTypeFlagBits = MsgTypeFlagBits.NoSeq
    serialization: SerializationBits = SerializationBits.JSON
    compression: CompressionBits = CompressionBits.None_

    event: EventType = EventType.None_
    session_id: str = ""
    connect_id: str = ""
    sequence: int = 0
    error_code: int = 0

    payload: bytes = b""

    @classmethod
    def from_bytes(cls, data: bytes) -> "Message":
        """Create message object from bytes"""
        if len(data) < 3:
            raise ValueError(
                f"Data too short: expected at least 3 bytes, got {len(data)}"
            )

        type_and_flag = data[1]
        msg_type = MsgType(type_and_flag >> 4)
        flag = MsgTypeFlagBits(type_and_flag & 0b00001111)

        msg = cls(type=msg_type, flag=flag)
        msg.unmarshal(data)
        return msg

    def marshal(self) -> bytes:
        """Serialize message to bytes"""
        buffer = io.BytesIO()

        # Write header
        header = [
            (self.version << 4) | self.header_size,
            (self.type << 4) | self.flag,
            (self.serialization << 4) | self.compression,
        ]

        header_size = 4 * self.header_size
        if padding := header_size - len(header):
            header.extend([0] * padding)

        buffer.write(bytes(header))

        # Write other fields
        writers = self._get_writers()
        for writer in writers:
            writer(buffer)

        return buffer.getvalue()

    def unmarshal(self, data: bytes) -> None:
        """Deserialize message from bytes"""
        buffer = io.BytesIO(data)

        # Read version and header size
        version_and_header_size = buffer.read(1)[0]
        self.version = VersionBits(version_and_header_size >> 4)
        self.header_size = HeaderSizeBits(version_and_header_size & 0b00001111)

        # Skip second byte
        buffer.read(1)

        # Read serialization and compression methods
        serialization_compression = buffer.read(1)[0]
        self.serialization = SerializationBits(serialization_compression >> 4)
        self.compression = CompressionBits(serialization_compression & 0b00001111)

        # Skip header padding
        header_size = 4 * self.header_size
        read_size = 3
        if padding_size := header_size - read_size:
            buffer.read(padding_size)

        # Read other fields
        readers = self._get_readers()
        for reader in readers:
            reader(buffer)

        # Check for remaining data
        remaining = buffer.read()
        if remaining:
            raise ValueError(f"Unexpected data after message: {remaining}")

    def _get_writers(self) -> List[Callable[[io.BytesIO], None]]:
        """Get list of writer functions"""
        writers = []

        if self.flag == MsgTypeFlagBits.WithEvent:
            writers.extend([self._write_event, self._write_session_id])

        if self.type in [
            MsgType.FullClientRequest,
            MsgType.FullServerResponse,
            MsgType.FrontEndResultServer,
            MsgType.AudioOnlyClient,
            MsgType.AudioOnlyServer,
        ]:
            if self.flag in [MsgTypeFlagBits.PositiveSeq, MsgTypeFlagBits.NegativeSeq]:
                writers.append(self._write_sequence)
        elif self.type == MsgType.Error:
            writers.append(self._write_error_code)
        else:
            raise ValueError(f"Unsupported message type: {self.type}")

        writers.append(self._write_payload)
        return writers

    def _get_readers(self) -> List[Callable[[io.BytesIO], None]]:
        """Get list of reader functions"""
        readers = []

        if self.type in [
            MsgType.FullClientRequest,
            MsgType.FullServerResponse,
            MsgType.FrontEndResultServer,
            MsgType.AudioOnlyClient,
            MsgType.AudioOnlyServer,
        ]:
            if self.flag in [MsgTypeFlagBits.PositiveSeq, MsgTypeFlagBits.NegativeSeq]:
                readers.append(self._read_sequence)
        elif self.type == MsgType.Error:
            readers.append(self._read_error_code)
        else:
            raise ValueError(f"Unsupported message type: {self.type}")

        if self.flag == MsgTypeFlagBits.WithEvent:
            readers.extend(
                [self._read_event, self._read_session_id, self._read_connect_id]
            )

        readers.append(self._read_payload)
        return readers

    def _write_event(self, buffer: io.BytesIO) -> None:
        """Write event"""
        buffer.write(struct.pack(">i", self.event))

    def _write_session_id(self, buffer: io.BytesIO) -> None:
        """Write session ID"""
        if self.event in [
            EventType.StartConnection,
            EventType.FinishConnection,
            EventType.ConnectionStarted,
            EventType.ConnectionFailed,
        ]:
            return

        session_id_bytes = self.session_id.encode("utf-8")
        size = len(session_id_bytes)
        if size > 0xFFFFFFFF:
            raise ValueError(f"Session ID size ({size}) exceeds max(uint32)")

        buffer.write(struct.pack(">I", size))
        if size > 0:
            buffer.write(session_id_bytes)

    def _write_sequence(self, buffer: io.BytesIO) -> None:
        """Write sequence number"""
        buffer.write(struct.pack(">i", self.sequence))

    def _write_error_code(self, buffer: io.BytesIO) -> None:
        """Write error code"""
        buffer.write(struct.pack(">I", self.error_code))

    def _write_payload(self, buffer: io.BytesIO) -> None:
        """Write payload"""
        size = len(self.payload)
        if size > 0xFFFFFFFF:
            raise ValueError(f"Payload size ({size}) exceeds max(uint32)")

        buffer.write(struct.pack(">I", size))
        buffer.write(self.payload)

    def _read_event(self, buffer: io.BytesIO) -> None:
        """Read event"""
        event_bytes = buffer.read(4)
        if event_bytes:
            self.event = EventType(struct.unpack(">i", event_bytes)[0])

    def _read_session_id(self, buffer: io.BytesIO) -> None:
        """Read session ID"""
        if self.event in [
            EventType.StartConnection,
            EventType.FinishConnection,
            EventType.ConnectionStarted,
            EventType.ConnectionFailed,
            EventType.ConnectionFinished,
        ]:
            return

        size_bytes = buffer.read(4)
        if size_bytes:
            size = struct.unpack(">I", size_bytes)[0]
            if size > 0:
                session_id_bytes = buffer.read(size)
                if len(session_id_bytes) == size:
                    self.session_id = session_id_bytes.decode("utf-8")

    def _read_connect_id(self, buffer: io.BytesIO) -> None:
        """Read connection ID"""
        if self.event in [
            EventType.ConnectionStarted,
            EventType.ConnectionFailed,
            EventType.ConnectionFinished,
        ]:
            size_bytes = buffer.read(4)
            if size_bytes:
                size = struct.unpack(">I", size_bytes)[0]
                if size > 0:
                    self.connect_id = buffer.read(size).decode("utf-8")

    def _read_sequence(self, buffer: io.BytesIO) -> None:
        """Read sequence number"""
        sequence_bytes = buffer.read(4)
        if sequence_bytes:
            self.sequence = struct.unpack(">i", sequence_bytes)[0]

    def _read_error_code(self, buffer: io.BytesIO) -> None:
        """Read error code"""
        error_code_bytes = buffer.read(4)
        if error_code_bytes:
            self.error_code = struct.unpack(">I", error_code_bytes)[0]

    def _read_payload(self, buffer: io.BytesIO) -> None:
        """Read payload"""
        size_bytes = buffer.read(4)
        if size_bytes:
            size = struct.unpack(">I", size_bytes)[0]
            if size > 0:
                self.payload = buffer.read(size)

    def __str__(self) -> str:
        """String representation"""
        if self.type in [MsgType.AudioOnlyServer, MsgType.AudioOnlyClient]:
            if self.flag in [MsgTypeFlagBits.PositiveSeq, MsgTypeFlagBits.NegativeSeq]:
                return f"MsgType: {self.type}, EventType:{self.event}, Sequence: {self.sequence}, PayloadSize: {len(self.payload)}"
            return f"MsgType: {self.type}, EventType:{self.event}, PayloadSize: {len(self.payload)}"
        elif self.type == MsgType.Error:
            return f"MsgType: {self.type}, EventType:{self.event}, ErrorCode: {self.error_code}, Payload: {self.payload.decode('utf-8', 'ignore')}"
        else:
            if self.flag in [MsgTypeFlagBits.PositiveSeq, MsgTypeFlagBits.NegativeSeq]:
                return f"MsgType: {self.type}, EventType:{self.event}, Sequence: {self.sequence}, Payload: {self.payload.decode('utf-8', 'ignore')}"
            return f"MsgType: {self.type}, EventType:{self.event}, Payload: {self.payload.decode('utf-8', 'ignore')}"


async def receive_message(websocket: websockets.WebSocketClientProtocol) -> Message:
    """Receive message from websocket"""
    try:
        data = await websocket.recv()
        if isinstance(data, str):
            raise ValueError(f"Unexpected text message: {data}")
        elif isinstance(data, bytes):
            msg = Message.from_bytes(data)
            logger.info(f"Received: {msg}")
            return msg
        else:
            raise ValueError(f"Unexpected message type: {type(data)}")
    except Exception as e:
        logger.error(f"Failed to receive message: {e}")
        raise


async def wait_for_event(
    websocket: websockets.WebSocketClientProtocol,
    msg_type: MsgType,
    event_type: EventType,
) -> Message:
    """Wait for specific event"""
    while True:
        msg = await receive_message(websocket)
        if msg.type != msg_type or msg.event != event_type:
            raise ValueError(f"Unexpected message: {msg}")
        if msg.type == msg_type and msg.event == event_type:
            return msg


async def full_client_request(
    websocket: websockets.WebSocketClientProtocol, payload: bytes
) -> None:
    """Send full client message"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.NoSeq)
    msg.payload = payload
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def audio_only_client(
    websocket: websockets.WebSocketClientProtocol, payload: bytes, flag: MsgTypeFlagBits
) -> None:
    """Send audio-only client message"""
    msg = Message(type=MsgType.AudioOnlyClient, flag=flag)
    msg.payload = payload
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def start_connection(websocket: websockets.WebSocketClientProtocol) -> None:
    """Start connection"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.StartConnection
    msg.payload = b"{}"
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def finish_connection(websocket: websockets.WebSocketClientProtocol) -> None:
    """Finish connection"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.FinishConnection
    msg.payload = b"{}"
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def start_session(
    websocket: websockets.WebSocketClientProtocol, payload: bytes, session_id: str
) -> None:
    """Start session"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.StartSession
    msg.session_id = session_id
    msg.payload = payload
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def finish_session(
    websocket: websockets.WebSocketClientProtocol, session_id: str
) -> None:
    """Finish session"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.FinishSession
    msg.session_id = session_id
    msg.payload = b"{}"
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def cancel_session(
    websocket: websockets.WebSocketClientProtocol, session_id: str
) -> None:
    """Cancel session"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.CancelSession
    msg.session_id = session_id
    msg.payload = b"{}"
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())


async def task_request(
    websocket: websockets.WebSocketClientProtocol, payload: bytes, session_id: str
) -> None:
    """Send task request"""
    msg = Message(type=MsgType.FullClientRequest, flag=MsgTypeFlagBits.WithEvent)
    msg.event = EventType.TaskRequest
    msg.session_id = session_id
    msg.payload = payload
    logger.info(f"Sending: {msg}")
    await websocket.send(msg.marshal())