"""Media controller services."""

import os
import platform
from pathlib import Path
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from .media_controller import MediaController

_controller_instance: "MediaController | None" = None


def _is_android() -> bool:
    """Check if running on Android (e.g., via Termux)."""
    # Check for Android-specific paths and environment
    android_indicators = [
        Path("/system/build.prop").exists(),
        Path("/data/data/com.termux").exists(),
        "ANDROID_ROOT" in os.environ,
        "TERMUX_VERSION" in os.environ,
    ]
    return any(android_indicators)


def get_media_controller() -> "MediaController":
    """Get the platform-specific media controller instance.

    Returns:
        The media controller for the current platform

    Raises:
        RuntimeError: If the platform is not supported
    """
    global _controller_instance

    if _controller_instance is not None:
        return _controller_instance

    system = platform.system()

    if system == "Windows":
        from .windows_media import WindowsMediaController
        from ..config import settings

        _controller_instance = WindowsMediaController(audio_device=settings.audio_device)
    elif system == "Linux":
        # Check if running on Android
        if _is_android():
            from .android_media import AndroidMediaController

            _controller_instance = AndroidMediaController()
        else:
            from .linux_media import LinuxMediaController

            _controller_instance = LinuxMediaController()
    elif system == "Darwin":  # macOS
        from .macos_media import MacOSMediaController

        _controller_instance = MacOSMediaController()
    else:
        raise RuntimeError(f"Unsupported platform: {system}")

    return _controller_instance


def get_current_album_art() -> bytes | None:
    """Get the current album art bytes (Windows only for now)."""
    system = platform.system()
    if system == "Windows":
        from .windows_media import get_current_album_art as _get_art
        return _get_art()
    return None


def get_audio_devices() -> list[dict[str, str]]:
    """Get list of available audio output devices (Windows only for now)."""
    system = platform.system()
    if system == "Windows":
        from .windows_media import WindowsMediaController
        return WindowsMediaController.get_audio_devices()
    return []


__all__ = ["get_media_controller", "get_current_album_art", "get_audio_devices"]