import 'package:flutter_test/flutter_test.dart';

/// Reported: playing a song stored on the phone and pressing NEXT jumped to a
/// radio station — "at least the first time".
///
/// Self-inflicted, by 3398d02. That commit taught `skipToNext`/`skipToPrevious`
/// to fall back to station-to-station skipping when there is no local queue,
/// so the car's transport buttons would not be dead for radio. But a
/// queue-less state does NOT mean "radio is playing": tapping ONE local track
/// goes through `reproducirPistaLocal`, which never builds a queue. Only
/// folder playback sets `_colaLocal` — which is exactly why the report said
/// "at least the first time".
///
/// `emisoraActual` cannot tell them apart either: `_cambiarFuente` fills it in
/// for every source, so a local MP3 arrives as an `Emisora` whose `url` is its
/// `content://` document URI. The media id's SCHEME is the real
/// discriminator, and this asserts on that rule — the same one
/// `esEmisoraGrabable` uses to keep the recorder off local files.
///
/// `PluriWaveAudioHandler` needs platform MethodChannels and cannot be built
/// in a unit test, so this pins the predicate rather than the private getter.
void main() {
  bool esRadio(String? id) {
    if (id == null) return false;
    final esquema = Uri.tryParse(id)?.scheme.toLowerCase();
    return esquema == 'http' || esquema == 'https';
  }

  test('un stream de radio SÍ permite saltar de emisora', () {
    expect(esRadio('http://stream.example.com/live'), isTrue);
    expect(esRadio('https://stream.example.com/live'), isTrue);
  });

  test('una pista local NO: es el caso exacto del reporte', () {
    expect(
      esRadio(
        'content://com.android.externalstorage.documents/tree/'
        'primary%3AMusic/document/primary%3AMusic%2FNew%20Limit%20-%20Smile.mp3',
      ),
      isFalse,
      reason:
          'con una pista suelta no hay cola, y antes de esto el boton '
          'siguiente se iba a una emisora de radio',
    );
    expect(esRadio('file:///storage/emulated/0/musica/a.mp3'), isFalse);
  });

  test('sin nada sonando tampoco se salta', () {
    expect(esRadio(null), isFalse);
    expect(esRadio(''), isFalse);
  });
}