// Workspace-anchor capture harness — visual proof for the sidebar
// switcher rebuild (persona review 2026-08-27). Renders the full
// shell against the scriptable fake hub and writes a PNG per theme
// via a RepaintBoundary (driverless, headed macOS `flutter test`).
//
//   flutter test integration_test/workspace_shots_test.dart -d macos
//
// Output: build/workspace-shots/<name>-<theme>.png
// (or $WORKSPACE_SHOTS_OUT).
//
// Fixture names are deliberately generic — never real client or
// area names.

import 'dart:async';
import 'dart:io';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:chain_client_sdk/chain_client_sdk.dart' show HubEndpoint;
import 'package:chain_studio/data/hub.dart';
import 'package:chain_studio/data/sealed_areas.dart';
import 'package:chain_studio/data/sidebar_prefs.dart';
import 'package:chain_studio/data/workspace.dart';
import 'package:chain_studio/data/workspace_prefs.dart';
import 'package:chain_studio/main.dart';
import 'package:chain_studio/widgets/chain_workspace_switcher.dart';

import '../test/support/fake_hub.dart';

final GlobalKey _shotKey = GlobalKey();

String get _outDir =>
    Platform.environment['WORKSPACE_SHOTS_OUT'] ?? 'build/workspace-shots';

Future<void> _shot(WidgetTester tester, String name) async {
  await tester.pump(const Duration(milliseconds: 150));
  await tester.pump(const Duration(milliseconds: 150));
  final boundary =
      _shotKey.currentContext!.findRenderObject() as RenderRepaintBoundary;
  final image = await boundary.toImage(pixelRatio: 2.0);
  final bytes = await image.toByteData(format: ui.ImageByteFormat.png);
  image.dispose();
  final file = File('$_outDir/$name.png');
  file.parent.createSync(recursive: true);
  file.writeAsBytesSync(bytes!.buffer.asUint8List());
  // ignore: avoid_print
  print('workspace-shot: ${file.path}');
}

const _projects = [
  ProjectRef(slug: 'general', name: 'General'),
  ProjectRef(
    slug: 'projekt-alpha',
    name: 'Projekt Alpha',
    color: '#8b7cf6',
    isolation: 'protected',
  ),
  ProjectRef(slug: 'projekt-beta', name: 'Projekt Beta', color: '#2e8f9e'),
];

const _areas = [
  SealedArea(
    slug: 'bereich-nord',
    name: 'Bereich Nord',
    color: '#e0a458',
    port: 51100,
    running: true,
  ),
  SealedArea(
    slug: 'bereich-sued',
    name: 'Bereich Süd',
    color: '#c25e5e',
    port: 51101,
    running: false,
  ),
];

class _FakeSealedAreas extends SealedAreaService {
  _FakeSealedAreas() : super.forTest();

  @override
  Future<List<SealedArea>> list() async => _areas;

  @override
  Future<String?> boundEndpoint(String slug) async => null;
}

class _GatedHub extends FakeHubService {
  Completer<void>? healthyGate;

  @override
  Future<void> reconnect(
    HubEndpoint endpoint, {
    Object? authToken = const Object(),
    bool persist = true,
  }) async {}

  @override
  Future<bool> healthy() async {
    final gate = healthyGate;
    if (gate != null) await gate.future;
    return true;
  }
}

Future<void> _boot(WidgetTester tester, _GatedHub hub, String theme) async {
  SharedPreferences.setMockInitialValues({});
  hub.projects = _projects;
  HubService.debugSetInstance(hub);
  SealedAreaService.debugSetInstance(_FakeSealedAreas());
  SidebarPrefs.pinned.value = true;
  Workspace.instance.debugSeed(
    projects: _projects,
    active: 'projekt-alpha',
    sealed: _areas,
  );
  tester.view.physicalSize = const Size(2560, 1600);
  tester.view.devicePixelRatio = 2.0;
  await tester.pumpWidget(
    RepaintBoundary(
      key: _shotKey,
      child: StudioApp(
        initialThemeMode: theme == 'dark'
            ? ThemeModeValue.dark
            : ThemeModeValue.light,
        initialLocale: const Locale('de'),
        startSidebarExpanded: true,
      ),
    ),
  );
  await tester.pump(const Duration(milliseconds: 300));
  await tester.pump(const Duration(milliseconds: 300));
}

Future<void> _teardown(WidgetTester tester) async {
  HubService.debugSetInstance(null);
  SealedAreaService.debugSetInstance(null);
  SidebarPrefs.pinned.value = false;
  WorkspacePrefs.sealedNamesVisible.value = false;
  Workspace.instance.debugSeed(projects: const [], active: '');
  await tester.pumpWidget(const SizedBox.shrink());
  await tester.pump(const Duration(minutes: 1));
  tester.view.reset();
}

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  for (final theme in ['light', 'dark']) {
    testWidgets('anchor + menu + switching bar — $theme', (tester) async {
      final hub = _GatedHub();
      await _boot(tester, hub, theme);

      // 01: the shell with the sidebar anchor (active project).
      await _shot(tester, '01-anchor-shell-$theme');

      // 02: the switcher menu — checkmark on the active project,
      // aggregated sealed row with the why-line + Settings link.
      await tester.tap(find.byType(ChainWorkspaceAnchor));
      await tester.pump(const Duration(milliseconds: 300));
      await _shot(tester, '02-switcher-menu-$theme');

      // 03: names revealed for this menu opening.
      await tester.tap(find.text('Namen einblenden'));
      await tester.pump(const Duration(milliseconds: 200));
      await _shot(tester, '03-switcher-menu-revealed-$theme');
      await tester.tapAt(const Offset(1200, 700)); // dismiss menu
      await tester.pump(const Duration(milliseconds: 300));

      // 04: the switching state — identity bar announces the
      // target BEFORE the connection settles (privacy race fix).
      hub.healthyGate = Completer<void>();
      final switching = Workspace.instance.switchToSealed(_areas.first);
      await tester.pump(const Duration(milliseconds: 100));
      await _shot(tester, '04-identity-switching-$theme');

      // 05: inside the sealed area — bar + anchor agree.
      hub.healthyGate!.complete();
      hub.healthyGate = null;
      await switching;
      await tester.pump(const Duration(milliseconds: 300));
      await _shot(tester, '05-identity-in-area-$theme');

      await Workspace.instance.switchToShared();
      await _teardown(tester);
    });
  }
}