import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/app/app_controller.dart';
import 'package:jj_mkvmaker/core/dlna.dart';
import 'package:jj_mkvmaker/platform/windows/desktop_storage_service.dart';
import 'package:jj_mkvmaker/platform/windows/process_media_tool.dart';
import 'package:jj_mkvmaker/services/platform_services.dart';
import 'package:jj_mkvmaker/ui/dlna_page.dart';

/// X-plore 비교 5-2 (사용자 결정 10/21 "DLNA 보기만"): 찾기 답 · 장치 설명 · DIDL 읽기, 같은 망 밖 주소는 따르지 않음, 화면
void main() {
  String didl(String body) => '<DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" '
      'xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/">$body</DIDL-Lite>';

  test('SSDP 답: 미디어 서버의 LOCATION 만 (머리 이름 대소문자 무시)', () {
    expect(parseSsdpLocation('HTTP/1.1 200 OK\r\nCACHE-CONTROL: max-age=1800\r\nlocation: http://192.168.0.5:8200/rootDesc.xml\r\n'
        'ST: urn:schemas-upnp-org:device:MediaServer:1\r\n\r\n'), 'http://192.168.0.5:8200/rootDesc.xml');
    expect(parseSsdpLocation('HTTP/1.1 200 OK\r\nLOCATION: http://x/\r\nST: urn:schemas-upnp-org:device:InternetGatewayDevice:1\r\n\r\n'), isNull);
    expect(parseSsdpLocation('NOTIFY * HTTP/1.1\r\nLOCATION: http://x/\r\n\r\n'), isNull);
    expect(ssdpSearchMessage(), contains('ST: urn:schemas-upnp-org:device:MediaServer:1'));
  });

  test('장치 설명: 이름 · ContentDirectory 제어 주소 (상대 주소는 URLBase · LOCATION 기준)', () {
    const xml = '<root xmlns="urn:schemas-upnp-org:device-1-0"><device><friendlyName>집 NAS</friendlyName><serviceList>'
        '<service><serviceType>urn:schemas-upnp-org:service:ConnectionManager:1</serviceType><controlURL>/cm</controlURL></service>'
        '<service><serviceType>urn:schemas-upnp-org:service:ContentDirectory:1</serviceType><controlURL>ctl/ContentDir</controlURL></service>'
        '</serviceList></device></root>';
    final s = parseDescription(xml, 'http://192.168.0.5:8200/rootDesc.xml')!;
    expect((s.name, s.controlUrl), ('집 NAS', 'http://192.168.0.5:8200/ctl/ContentDir'));
    final withBase = parseDescription(xml.replaceFirst('<device>', '<URLBase>http://192.168.0.9:9000/</URLBase><device>'),
        'http://192.168.0.5:8200/rootDesc.xml')!;
    expect(withBase.controlUrl, 'http://192.168.0.9:9000/ctl/ContentDir');
    expect(parseDescription('<root><device><friendlyName>x</friendlyName></device></root>', 'http://1.2.3.4/'), isNull);
  });

  test('DIDL: 폴더 · 동영상 · 음악 · 사진 · 크기 · 길이, 같은 망 밖의 주소는 열지 않음', () {
    final list = parseDidl(didl(
        '<container id="64" parentID="0" childCount="12"><dc:title>영화</dc:title><upnp:class>object.container</upnp:class></container>'
        '<item id="64\$1"><dc:title>1화.mkv</dc:title><upnp:class>object.item.videoItem</upnp:class>'
        '<res protocolInfo="http-get:*:video/x-matroska:*" size="123456" duration="0:45:01.000">http://192.168.0.5:8200/MediaItems/1.mkv</res></item>'
        '<item id="a"><dc:title>노래</dc:title><upnp:class>object.item.audioItem.musicTrack</upnp:class>'
        '<res protocolInfo="http-get:*:audio/mpeg:*">http://10.0.0.2/s.mp3</res></item>'
        '<item id="b"><dc:title>밖</dc:title><upnp:class>object.item.imageItem.photo</upnp:class>'
        '<res protocolInfo="http-get:*:image/jpeg:*">http://8.8.8.8/x.jpg</res></item>'));
    expect(list.map((e) => (e.title, e.isContainer, e.kind)), [('영화', true, 'other'), ('1화.mkv', false, 'video'), ('노래', false, 'audio'), ('밖', false, 'image')]);
    expect(list[0].childCount, 12);
    expect((list[1].size, list[1].duration, list[1].mime), (123456, const Duration(minutes: 45, seconds: 1), 'video/x-matroska'));
    expect(list[1].url, 'http://192.168.0.5:8200/MediaItems/1.mkv');
    expect(list[3].url, isNull, reason: '바깥 주소 (8.8.8.8) 는 따르지 않음');
    expect(dlnaHostAllowed('192.168.1.10'), isTrue);
    expect(dlnaHostAllowed('127.0.0.1'), isTrue);
    expect(dlnaHostAllowed('100.80.1.2'), isFalse, reason: 'Tailscale 범위 (CGNAT) 는 사설 LAN 이 아님');
    expect(dlnaHostAllowed('example.com'), isFalse);
  });

  test('보낼 주소가 없으면 (Wi-Fi · 유선 아님) 찾지 않고 빈 목록', () async {
    expect(await discoverDlna(addresses: const [], wait: Duration.zero), isEmpty);
  });

  test('가짜 서버: Browse (SOAP) 로 목록 · 전체 수 · 이어 읽기 (StartingIndex)', () async {
    final starts = <String>[];
    final srv = await HttpServer.bind(InternetAddress.loopbackIPv4, 0);
    addTearDown(() => srv.close(force: true));
    srv.listen((req) async {
      final body = await utf8.decoder.bind(req).join();
      final start = RegExp(r'<StartingIndex>(\d+)</StartingIndex>').firstMatch(body)?[1] ?? '?';
      starts.add('${req.headers.value('soapaction')}|$start');
      final result = didl('<item id="i$start"><dc:title>사진 $start</dc:title><upnp:class>object.item.imageItem</upnp:class>'
          '<res protocolInfo="http-get:*:image/jpeg:*">http://127.0.0.1:${srv.port}/p$start.jpg</res></item>');
      final esc = result.replaceAll('&', '&amp;').replaceAll('<', '&lt;').replaceAll('>', '&gt;');
      req.response.headers.contentType = ContentType('text', 'xml', charset: 'utf-8');
      req.response.write('<?xml version="1.0"?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body>'
          '<u:BrowseResponse xmlns:u="urn:schemas-upnp-org:service:ContentDirectory:1"><Result>$esc</Result>'
          '<NumberReturned>1</NumberReturned><TotalMatches>2</TotalMatches></u:BrowseResponse></s:Body></s:Envelope>');
      await req.response.close();
    });
    final s = DlnaServer('가짜', 'http://127.0.0.1:${srv.port}/desc.xml', 'http://127.0.0.1:${srv.port}/ctl');
    // 위젯 시험이 있는 파일은 시험 binding 이 HttpClient 를 가짜로 바꾼다 - 진짜 연결로
    await HttpOverrides.runWithHttpOverrides(() async {
      final a = await dlnaBrowse(s, objectId: '1&2');
      expect(a.total, 2);
      expect(a.entries.single.title, '사진 0');
      expect(a.entries.single.url, 'http://127.0.0.1:${srv.port}/p0.jpg');
      final b = await dlnaBrowse(s, objectId: '1&2', start: 1);
      expect(b.entries.single.title, '사진 1');
      expect(starts, ['"urn:schemas-upnp-org:service:ContentDirectory:1#Browse"|0', '"urn:schemas-upnp-org:service:ContentDirectory:1#Browse"|1']);
      await expectLater(dlnaBrowse(const DlnaServer('밖', 'http://8.8.8.8/', 'http://8.8.8.8/ctl')), throwsA(isA<DlnaException>()));
    }, _RealHttp());
  });

  testWidgets('화면: 서버 목록 → 폴더 → 안의 폴더 → ← 로 위 → 서버 목록 · 바깥 주소 항목은 "열 수 없음" · 못 찾으면 안내', (tester) async {
    tester.view.physicalSize = const Size(900, 1200);
    tester.view.devicePixelRatio = 1;
    addTearDown(tester.view.reset);
    final c = AppController(PlatformServices(mediaTool: ProcessMediaTool('x', 'y'), storage: DesktopStorageService()));
    const nas = DlnaServer('집 NAS', 'http://192.168.0.5/d.xml', 'http://192.168.0.5/ctl');
    await tester.pumpWidget(MaterialApp(
      home: DlnaPage(
        c: c,
        discover: () async => [nas],
        browse: (s, id, start) async => switch (id) {
          '0' => (entries: [const DlnaEntry('v', '동영상', isContainer: true, childCount: 2)], total: 1),
          'v' => (
              entries: [
                const DlnaEntry('v1', '안쪽', isContainer: true),
                const DlnaEntry('x', '밖.mp4', upnpClass: 'object.item.videoItem'),
              ],
              total: 2
            ),
          _ => (entries: <DlnaEntry>[], total: 0),
        },
      ),
    ));
    await tester.pumpAndSettle();
    expect(find.textContaining('보기만 합니다'), findsOneWidget);
    await tester.tap(find.text('집 NAS'));
    await tester.pumpAndSettle();
    expect(find.text('동영상'), findsOneWidget);
    await tester.tap(find.text('동영상'));
    await tester.pumpAndSettle();
    expect(find.text('안쪽'), findsOneWidget);
    expect(find.text('열 수 없음'), findsOneWidget);
    await tester.tap(find.text('밖.mp4'));
    await tester.pump();
    expect(find.text('이 항목은 같은 망 밖의 주소라 열지 않습니다'), findsOneWidget);
    await tester.tap(find.byTooltip('뒤로'));
    await tester.pumpAndSettle();
    expect(find.text('동영상'), findsOneWidget);
    await tester.tap(find.byTooltip('뒤로'));
    await tester.pumpAndSettle();
    expect(find.text('집 NAS'), findsOneWidget);

    await tester.pumpWidget(MaterialApp(home: DlnaPage(key: UniqueKey(), c: c, discover: () async => const [])));
    await tester.pumpAndSettle();
    expect(find.textContaining('미디어 서버를 찾지 못했습니다'), findsOneWidget);
  });
}

class _RealHttp extends HttpOverrides {}