/// 成员管理页 widget 测试（UI-03 §4 页面 11 重设计后）。
///
/// 覆盖：Owner 单独分组（无移除）与 Collaborators 列表（首字母头像/
/// 显示名/账号·角色/行尾「⋯」）、标题计数、空协作者态；Invite colleague
/// BottomSheet 搜索（防抖 300ms、≥2 字符、连续输入合并）→ Add 载荷 →
/// 已添加态；MEMBER_CONFLICT 本地化；移除确认（含成员名）→ DELETE。
library;

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:photo_live/core/api_client.dart';
import 'package:photo_live/core/error_codes.dart';
import 'package:photo_live/core/session_store.dart';
import 'package:photo_live/features/albums/models.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/album_members_page.dart';

import '../helpers/fakes.dart';

void main() {
  late FakeSessionStore store;
  late List<Map<String, dynamic>> members;
  late List<Map<String, dynamic>> lookups;

  setUp(() {
    store = FakeSessionStore()
      ..session = Session(
        token: 'tok-live',
        expiresAt: DateTime.utc(2099, 1, 1),
        account: 'staff01',
      );
    members = <Map<String, dynamic>>[
      memberJson(
        userId: 'u-owner',
        account: 'boss01',
        displayName: 'The Owner',
        role: 'owner',
      ),
      memberJson(userId: 'u-1', account: 'staff01', displayName: 'Staff One'),
      memberJson(userId: 'u-2', account: 'staff02', displayName: 'Staff Two'),
    ];
    lookups = <Map<String, dynamic>>[lookupUserJson()];
  });

  FakeAdapter membersAdapter({
    (int, Object?)? Function(String method, String path)? onMutation,
  }) =>
      FakeAdapter((o) {
        if (o.path == '/v1/albums/alb-1/members' && o.method == 'GET') {
          return (200, cursorPageBody(members));
        }
        if (o.path == '/v1/albums/alb-1/members' && o.method == 'POST') {
          final override = onMutation?.call('POST', o.path);
          if (override != null) return override;
          members = <Map<String, dynamic>>[
            ...members,
            memberJson(userId: 'u-9', account: 'staff09'),
          ];
          return (201, memberJson(userId: 'u-9', account: 'staff09'));
        }
        if (o.path == '/v1/albums/alb-1/members/u-2' && o.method == 'DELETE') {
          final override = onMutation?.call('DELETE', o.path);
          if (override != null) return override;
          members = members
              .where((m) => m['userId'] != 'u-2')
              .toList();
          return (204, null);
        }
        if (o.path == '/v1/admin/users' && o.method == 'GET') {
          return (200, <String, dynamic>{'items': lookups});
        }
        throw StateError('unexpected ${o.method} ${o.path}');
      });

  ApiClient clientOf(FakeAdapter adapter) => ApiClient(
        sessionStore: store,
        dio: Dio(BaseOptions(baseUrl: 'http://test.local'))
          ..httpClientAdapter = adapter,
      );

  Future<void> pumpMembers(WidgetTester tester, ApiClient client) async {
    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          apiClientProvider.overrideWith((ref) => client),
          // 本人识别走会话存储：覆写为内存假件（secure storage 插件缺失）。
          sessionStoreProvider.overrideWith((ref) => store),
        ],
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: AlbumMembersPage(
            album: Album.fromJson(albumJson()),
          ),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  /// 打开邀请面板（底部全宽按钮）。
  Future<void> openInviteSheet(WidgetTester tester) async {
    await tester.tap(find.text('Invite colleague'));
    await tester.pumpAndSettle();
    expect(find.byType(AlbumInviteSheet), findsOneWidget);
  }

  testWidgets('分组渲染：Owner 单独组（无「⋯」）、协作者行尾「⋯」、标题计数',
      (tester) async {
    await pumpMembers(tester, clientOf(membersAdapter()));

    expect(find.text('Members (3)'), findsOneWidget);
    expect(find.text('Owner'), findsOneWidget);
    expect(find.text('Collaborators'), findsOneWidget);
    // Owner 行：显示名 + 账号·角色，无移除入口。
    expect(find.text('The Owner'), findsOneWidget);
    expect(find.text('boss01 · Owner'), findsOneWidget);
    // 协作者行：staff01 为本人（带标记），staff02 可移除（行尾「⋯」）。
    expect(find.text('Staff One (you)'), findsOneWidget);
    expect(find.text('staff01 · Collaborator'), findsOneWidget);
    expect(find.text('Staff Two'), findsOneWidget);
    expect(find.byIcon(Icons.more_horiz), findsOneWidget,
        reason: '仅非本人协作者有「⋯」');
    // 首字母头像。
    expect(find.text('T'), findsOneWidget);
    expect(find.text('S'), findsNWidgets(2));
  });

  testWidgets('空协作者：占位文案 + 底部邀请入口', (tester) async {
    members = <Map<String, dynamic>>[
      memberJson(
        userId: 'u-owner',
        account: 'boss01',
        displayName: 'The Owner',
        role: 'owner',
      ),
    ];
    await pumpMembers(tester, clientOf(membersAdapter()));

    expect(find.text('Members (1)'), findsOneWidget);
    expect(find.text('No collaborators yet'), findsOneWidget);
    expect(find.byIcon(Icons.person_add_outlined), findsOneWidget);
  });

  testWidgets('邀请搜索防抖：<2 字符不请求；连续输入合并为最后一次（300ms）',
      (tester) async {
    final adapter = membersAdapter();
    await pumpMembers(tester, clientOf(adapter));

    await openInviteSheet(tester);
    final field = find.byType(TextField);

    // 1 个字符：无请求。
    await tester.enterText(field, 's');
    await tester.pump(const Duration(milliseconds: 400));
    expect(
      adapter.requests.where((r) => r.path == '/v1/admin/users'),
      isEmpty,
    );

    // 连续输入两次，防抖合并为最后一次。
    await tester.enterText(field, 'st');
    await tester.pump(const Duration(milliseconds: 100));
    await tester.enterText(field, 'sta');
    await tester.pump(const Duration(milliseconds: 350));

    final lookupsRequests = adapter.requests
        .where((r) => r.path == '/v1/admin/users')
        .toList();
    expect(lookupsRequests, hasLength(1));
    expect(lookupsRequests.single.uri.queryParameters['accountPrefix'], 'sta');
  });

  testWidgets('邀请流：搜索命中 → Add → POST userId 载荷 → 已添加态 + 列表刷新',
      (tester) async {
    // 命中结果同时含已成员（staff02）与新用户（staff09）。
    lookups = <Map<String, dynamic>>[
      lookupUserJson(),
      lookupUserJson(
        id: 'u-2',
        account: 'staff02',
        displayName: 'Staff Two',
      ),
    ];
    final adapter = membersAdapter();
    await pumpMembers(tester, clientOf(adapter));

    await openInviteSheet(tester);
    await tester.enterText(find.byType(TextField), 'staff');
    await tester.pump(const Duration(milliseconds: 400));

    // 已成员（staff02）：显示 Already added，无 Add 按钮（结果行限定在
    // 面板内——页面成员列表同名行在面板后面）。
    final sheet = find.byType(AlbumInviteSheet);
    expect(find.text('Already added'), findsOneWidget);
    expect(
      find.descendant(of: sheet, matching: find.text('Staff Two')),
      findsOneWidget,
    );

    // 新用户：Add → POST {'userId': 'u-9'} → 面板内即时变为已添加。
    await tester.tap(find.text('Add'));
    await tester.pumpAndSettle();

    final invite = adapter.requests.singleWhere(
      (r) => r.method == 'POST' && r.path == '/v1/albums/alb-1/members',
    );
    expect(invite.body, <String, dynamic>{'userId': 'u-9'});
    expect(find.text('Invited'), findsOneWidget);
    expect(find.text('Already added'), findsNWidgets(2),
        reason: '邀请成功后该行即时变为已添加');
    // 上级列表已刷新（staff09 入列）。
    expect(find.text('staff09 · Collaborator'), findsOneWidget);
  });

  testWidgets('邀请冲突（409 MEMBER_CONFLICT）→ 已是成员文案', (tester) async {
    final adapter = membersAdapter(
      onMutation: (method, path) =>
          method == 'POST' ? (409, errorBody(ErrorCodes.memberConflict)) : null,
    );
    await pumpMembers(tester, clientOf(adapter));

    await openInviteSheet(tester);
    await tester.enterText(find.byType(TextField), 'staff09');
    await tester.pump(const Duration(milliseconds: 400));
    await tester.tap(find.text('Add'));
    await tester.pumpAndSettle();

    expect(find.text('User is already a member'), findsOneWidget);
  });

  testWidgets('移除成员：「⋯」→ 确认（含成员名）→ DELETE → 列表刷新',
      (tester) async {
    final adapter = membersAdapter();
    await pumpMembers(tester, clientOf(adapter));

    await tester.tap(find.byIcon(Icons.more_horiz));
    await tester.pumpAndSettle();

    // 确认文案带成员名。
    expect(find.text('Remove Staff Two from this album?'), findsOneWidget);
    // 取消不发请求。
    await tester.tap(find.text('Cancel'));
    await tester.pumpAndSettle();
    expect(
      adapter.requests.any((r) => r.method == 'DELETE'),
      isFalse,
    );

    await tester.tap(find.byIcon(Icons.more_horiz));
    await tester.pumpAndSettle();
    await tester.tap(find.widgetWithText(FilledButton, 'Delete'));
    await tester.pumpAndSettle();

    expect(
      adapter.requests.any(
        (r) => r.method == 'DELETE' && r.path == '/v1/albums/alb-1/members/u-2',
      ),
      isTrue,
    );
    expect(find.text('Staff Two'), findsNothing);
    expect(find.text('Members (2)'), findsOneWidget);
  });
}