import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:reelbox/media/media_files_io.dart' as files;

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test(
    'parallel optimization requires a successful HEAD with size and ranges',
    () async {
      final previous = HttpOverrides.current;
      HttpOverrides.global = null;
      addTearDown(() => HttpOverrides.global = previous);
      final server = await HttpServer.bind(InternetAddress.loopbackIPv4, 0);
      addTearDown(() => server.close(force: true));
      final methods = <String>[];
      server.listen((request) async {
        methods.add(request.method);
        switch (request.uri.path) {
          case '/capable':
            request.response.contentLength = 524288;
            request.response.headers.set('accept-ranges', 'bytes');
          case '/no-head':
            request.response.statusCode = HttpStatus.methodNotAllowed;
          case '/no-ranges':
            request.response.contentLength = 524288;
          case '/unknown-size':
            request.response.headers.set('accept-ranges', 'bytes');
          case '/forbidden':
            request.response.statusCode = HttpStatus.forbidden;
          default:
            request.response.statusCode = HttpStatus.notFound;
        }
        await request.response.close();
      });
      String url(String path) => 'http://127.0.0.1:${server.port}$path';
      expect(await files.supportsParallelDownload(url('/capable')), isTrue);
      for (final path in [
        '/no-head',
        '/no-ranges',
        '/unknown-size',
        '/forbidden',
      ]) {
        expect(
          await files.supportsParallelDownload(url(path)),
          isFalse,
          reason: path,
        );
      }
      expect(methods, List.filled(5, 'HEAD'));
      expect(
        await files.supportsParallelDownload('file:///private.mp4'),
        isFalse,
      );
    },
  );
}