from __future__ import annotations

from pathlib import Path
from typing import Callable

from discord.ext import voice_recv


class MeetingRecorder:
    """Wrapper around discord-ext-voice-recv's listen/stop_listening API."""

    def __init__(self, voice_client: voice_recv.VoiceRecvClient, output_path: str):
        self.vc = voice_client
        self.output_path = output_path
        self.recording = False
        self.sink: voice_recv.WaveSink | None = None

    async def start(self, after_callback: Callable[[Exception | None], None]) -> None:
        if self.vc.is_listening():
            raise RuntimeError("Voice client is already listening")

        Path(self.output_path).parent.mkdir(parents=True, exist_ok=True)
        self.sink = voice_recv.WaveSink(self.output_path)
        self.vc.listen(self.sink, after=after_callback)
        self.recording = True

    async def stop(self) -> None:
        if not self.recording:
            return

        if self.vc.is_listening():
            self.vc.stop_listening()
        self.recording = False