from __future__ import annotations

import queue
import sys

from beefy_player import mediasession
from beefy_player.mediasession import (
    MediaSession,
    NowPlayingSession,
    create_media_session,
)


def test_linux_uses_mpris() -> None:
    from beefy_player.mpris import MprisService

    session = create_media_session(queue.Queue(), enabled=False, platform="linux")
    assert isinstance(session, MprisService)
    assert session.label == "mpris"


def test_macos_uses_the_system_now_playing_session() -> None:
    session = create_media_session(
        queue.Queue(), enabled=True, backend="mpv", platform="darwin"
    )
    assert isinstance(session, NowPlayingSession)
    assert session.label == "nowplaying"
    assert session.status_label == "on"


def test_macos_without_mpv_reports_off() -> None:
    session = create_media_session(
        queue.Queue(), enabled=True, backend="ffplay", platform="darwin"
    )
    assert session.status_label == "off"


def test_disabled_session_is_inert_but_keeps_state() -> None:
    actions: queue.Queue[str] = queue.Queue()
    session = MediaSession(actions, enabled=False)
    session.start()
    session.set_status("Playing")
    session.set_volume(1.7)
    session.set_track(station="Groove Salad", title="T", artist="A", album="B")
    session.stop()
    assert session.status_label == "off"
    assert session._status == "Playing"
    assert session._volume == 1.0
    assert session._metadata["album"] == "B"
    assert actions.empty()


def test_platform_detection_is_available_for_tests() -> None:
    # The factory must never import D-Bus code on a platform without it.
    assert "linux" in sys.platform or sys.platform == "darwin"
    assert mediasession.media_actions_queue().empty()