"""Audio player using Reachy Mini's media system."""

import logging
import threading
import time
from collections.abc import Callable
from pathlib import Path
from typing import List, Optional, Union

import numpy as np
import scipy.signal

_LOGGER = logging.getLogger(__name__)


class AudioPlayer:
    """Audio player using Reachy Mini's media system."""

    def __init__(self, reachy_mini=None) -> None:
        self.reachy_mini = reachy_mini
        self.is_playing = False
        self._playlist: List[str] = []
        self._done_callback: Optional[Callable[[], None]] = None
        self._done_callback_lock = threading.Lock()
        self._duck_volume: float = 0.5
        self._unduck_volume: float = 1.0
        self._current_volume: float = 1.0
        self._stop_flag = threading.Event()

    def set_reachy_mini(self, reachy_mini) -> None:
        """Set the Reachy Mini instance."""
        self.reachy_mini = reachy_mini

    def play(
        self,
        url: Union[str, List[str]],
        done_callback: Optional[Callable[[], None]] = None,
        stop_first: bool = True,
    ) -> None:
        if stop_first:
            self.stop()

        if isinstance(url, str):
            self._playlist = [url]
        else:
            self._playlist = list(url)

        self._done_callback = done_callback
        self._stop_flag.clear()
        self._play_next()

    def _play_next(self) -> None:
        if not self._playlist or self._stop_flag.is_set():
            self._on_playback_finished()
            return

        next_url = self._playlist.pop(0)
        _LOGGER.debug("Playing %s", next_url)
        self.is_playing = True

        # Start playback in a thread
        thread = threading.Thread(target=self._play_file, args=(next_url,), daemon=True)
        thread.start()

    def _play_file(self, file_path: str) -> None:
        """Play an audio file."""
        try:
            # Handle URLs - download first
            if file_path.startswith(("http://", "https://")):
                import urllib.request
                import tempfile

                with tempfile.NamedTemporaryFile(delete=False, suffix=".wav") as tmp:
                    urllib.request.urlretrieve(file_path, tmp.name)
                    file_path = tmp.name

            if self._stop_flag.is_set():
                return

            # Use Reachy Mini's media system if available
            if self.reachy_mini is not None:
                try:
                    # Use Reachy Mini's play_sound method
                    self.reachy_mini.media.play_sound(file_path)

                    # Estimate playback duration and wait
                    import soundfile as sf
                    data, samplerate = sf.read(file_path)
                    duration = len(data) / samplerate

                    # Wait for playback to complete (with stop check)
                    start_time = time.time()
                    while time.time() - start_time < duration:
                        if self._stop_flag.is_set():
                            self.reachy_mini.media.clear_output_buffer()
                            break
                        time.sleep(0.1)

                except Exception as e:
                    _LOGGER.warning("Reachy Mini audio failed, falling back to sounddevice: %s", e)
                    self._play_file_fallback(file_path)
            else:
                self._play_file_fallback(file_path)

        except Exception as e:
            _LOGGER.error("Error playing audio: %s", e)
        finally:
            self.is_playing = False
            # Play next in playlist or finish
            if self._playlist and not self._stop_flag.is_set():
                self._play_next()
            else:
                self._on_playback_finished()

    def _play_file_fallback(self, file_path: str) -> None:
        """Fallback to sounddevice for audio playback."""
        import sounddevice as sd
        import soundfile as sf

        data, samplerate = sf.read(file_path)

        # Apply volume
        data = data * self._current_volume

        if not self._stop_flag.is_set():
            sd.play(data, samplerate)
            sd.wait()

    def _on_playback_finished(self) -> None:
        """Called when playback is finished."""
        self.is_playing = False
        todo_callback: Optional[Callable[[], None]] = None

        with self._done_callback_lock:
            if self._done_callback:
                todo_callback = self._done_callback
                self._done_callback = None

        if todo_callback:
            try:
                todo_callback()
            except Exception:
                _LOGGER.exception("Unexpected error running done callback")

    def pause(self) -> None:
        self.is_playing = False

    def resume(self) -> None:
        if self._playlist:
            self._play_next()

    def stop(self) -> None:
        self._stop_flag.set()
        if self.reachy_mini is not None:
            try:
                self.reachy_mini.media.clear_output_buffer()
            except Exception:
                pass
        self._playlist.clear()
        self.is_playing = False

    def duck(self) -> None:
        self._current_volume = self._duck_volume

    def unduck(self) -> None:
        self._current_volume = self._unduck_volume

    def set_volume(self, volume: int) -> None:
        volume = max(0, min(100, volume))
        self._unduck_volume = volume / 100.0
        self._duck_volume = self._unduck_volume / 2
        self._current_volume = self._unduck_volume