import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';

import 'package:yommi_ff/services/m3u_service.dart';
import 'package:yommi_ff/models/stream_entry.dart';

class _MockClient extends Mock implements http.Client {}

void main() {
  group('M3UService', () {
    test('parses simple m3u content', () {
      final content = '''#EXTM3U
#EXTINF:-1,Channel One
http://example.com/stream1.m3u8
#EXTINF:-1,Second Channel
http://example.com/stream2.m3u8
''';
      final svc = M3UService(client: http.Client());
      final entries = svc.parse(content);
      expect(entries, [
        StreamEntry(
            title: 'Channel One', url: 'http://example.com/stream1.m3u8'),
        StreamEntry(
            title: 'Second Channel', url: 'http://example.com/stream2.m3u8'),
      ]);
    });

    test('fetches and caches', () async {
      final mock = _MockClient();
      final url = 'http://mock/m3u';
      final body = '#EXTM3U\n#EXTINF:-1,Mock\nhttp://mock/stream\n';
      when(() => mock.get(Uri.parse(url)))
          .thenAnswer((_) async => http.Response(body, 200));

      final svc = M3UService(client: mock);
      final first = await svc.fetch(url);
      expect(first.length, 1);
      // second fetch should use cache — we verify by changing mock to throw if called again
      when(() => mock.get(Uri.parse(url)))
          .thenThrow(Exception('should not be called'));
      final second = await svc.fetch(url);
      expect(second.length, 1);
    });

    test('throws on empty', () {
      final svc = M3UService();
      expect(() => svc.parse(''), throwsA(isA<M3uParseException>()));
    });
  });
}