import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:go_router/go_router.dart';
import '../../shared/widgets/app_scaffold.dart';
import '../../shared/widgets/nav_bar_config.dart';
import 'route_observer.dart';
import '../../features/home/home_page.dart';
import '../../features/messages/message_list_page.dart';
import '../../features/profile/profile_page.dart';
import '../../features/expense/expense_list_page.dart';
import '../../features/expense/expense_create_page.dart';
import '../../features/expense/expense_detail_page.dart';
import '../../features/expense/expense_apply_import_page.dart';
import '../../features/overtime/overtime_apply_list_page.dart';
import '../../features/overtime/overtime_apply_create_page.dart';
import '../../features/overtime/overtime_apply_detail_page.dart';
import '../../features/overtime/overtime_apply_edit_page.dart';
import '../../features/vehicle/vehicle_apply_list_page.dart';
import '../../features/vehicle/vehicle_apply_create_page.dart';
import '../../features/vehicle/vehicle_apply_detail_page.dart';
import '../../features/vehicle/vehicle_apply_edit_page.dart';
import '../../features/outing_log/outing_log_list_page.dart';
import '../../features/outing_log/outing_log_create_page.dart';
import '../../features/outing_log/outing_log_detail_page.dart';
import '../../features/announcement/announcement_list_page.dart';
import '../../features/announcement/announcement_detail_page.dart';
import '../../features/announcement/announcement_create_page.dart';
import '../../features/expense_apply/expense_apply_list_page.dart';
import '../../features/expense_apply/expense_apply_detail_page.dart';
import '../../features/expense_apply/expense_apply_create_page.dart';
import '../../features/expense_apply/expense_apply_edit_page.dart';
import '../../features/expense/expense_edit_page.dart';
import '../../features/report/expense_detail_report_page.dart';
import '../../features/report/overtime_detail_report_page.dart';
import '../../features/report/vehicle_detail_report_page.dart';
import '../../features/report/expense_apply_detail_report_page.dart';
import '../../features/report/outing_log_detail_report_page.dart';
import '../../features/admin/admin_permissions_page.dart';

Widget _addButton(BuildContext context, String route) => GestureDetector(
  onTap: () => context.push(route),
  child: const Icon(Icons.add, color: Color(0xFF333333), size: 22),
);

void _popToNative() {
  FocusManager.instance.primaryFocus?.unfocus();
  SystemNavigator.pop();
}

void _smartBack(BuildContext context) {
  final r = GoRouter.of(context);
  if (r.canPop()) {
    r.pop();
  } else {
    SystemNavigator.pop();
  }
}

GoRouter createAppRouter() => GoRouter(
  observers: [routeObserver],
  initialLocation: '/',
  routes: [
    // ── 根 Tab ──
    GoRoute(
      path: '/',
      pageBuilder: (_, _) => const MaterialPage(
        child: AppScaffold(showTabBar: true, body: HomePage()),
      ),
    ),
    GoRoute(
      path: '/messages',
      pageBuilder: (_, _) => const MaterialPage(
        child: AppScaffold(showTabBar: true, body: MessageListPage()),
      ),
    ),
    GoRoute(
      path: '/profile',
      pageBuilder: (_, _) => const MaterialPage(
        child: AppScaffold(showTabBar: true, body: ProfilePage()),
      ),
    ),

    // ── 费用报销 ──
    GoRoute(
      path: '/expense/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/expense/create'),
            onBack: _popToNative,
          ),
          body: const ExpenseListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/expense/import-apply',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const ExpenseApplyImportPage(),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),
    GoRoute(
      path: '/expense/create',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        canPop: false,
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: ExpenseCreatePage(editId: state.uri.queryParameters['id']),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),
    GoRoute(
      path: '/expense/detail/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: ExpenseDetailPage(
            billNo: state.pathParameters['billNo']!,
            queryId:
                int.tryParse(state.uri.queryParameters['queryId'] ?? '0') ?? 0,
          ),
        ),
      ),
    ),
    GoRoute(
      path: '/expense/edit/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: ExpenseEditPage(billNo: state.pathParameters['billNo']!),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),

    // ── 加班 ──
    GoRoute(
      path: '/overtime-apply/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/overtime-apply/create'),
            onBack: _popToNative,
          ),
          body: const OvertimeApplyListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/overtime-apply/create',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: const OvertimeApplyCreatePage(),
        ),
      ),
    ),
    GoRoute(
      path: '/overtime-apply/detail/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: OvertimeApplyDetailPage(
            billNo: state.pathParameters['billNo']!,
          ),
        ),
      ),
    ),
    GoRoute(
      path: '/overtime-apply/edit/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: OvertimeApplyEditPage(billNo: state.pathParameters['billNo']!),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),

    // ── 用车 ──
    GoRoute(
      path: '/vehicle-apply/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/vehicle-apply/create'),
            onBack: _popToNative,
          ),
          body: const VehicleApplyListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/vehicle-apply/create',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: const VehicleApplyCreatePage(),
        ),
      ),
    ),
    GoRoute(
      path: '/vehicle-apply/detail/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: VehicleApplyDetailPage(billNo: state.pathParameters['billNo']!),
        ),
      ),
    ),
    GoRoute(
      path: '/vehicle-apply/edit/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: VehicleApplyEditPage(billNo: state.pathParameters['billNo']!),
        ),
      ),
    ),
    GoRoute(
      path: '/vehicle-apply/edit/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: VehicleApplyEditPage(billNo: state.pathParameters['billNo']!),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),

    // ── 外勤日志 ──
    GoRoute(
      path: '/outing-log/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/outing-log/create'),
            onBack: _popToNative,
          ),
          body: const OutingLogListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/outing-log/create',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: const OutingLogCreatePage(),
        ),
      ),
    ),
    GoRoute(
      path: '/outing-log/detail/:id',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: OutingLogDetailPage(id: state.pathParameters['id']!),
        ),
      ),
    ),

    // ── 公告 ──
    GoRoute(
      path: '/announcement/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/announcement/create'),
            onBack: _popToNative,
          ),
          body: const AnnouncementListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/announcement/detail/:id',
      pageBuilder: (context, state) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: AnnouncementDetailPage(id: state.pathParameters['id']!),
        ),
      ),
    ),
    GoRoute(
      path: '/announcement/create',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: const AnnouncementCreatePage(),
        ),
      ),
    ),

    // ── 费用申请 ──
    GoRoute(
      path: '/expense-apply/list',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            showRight: true,
            rightWidget: _addButton(context, '/expense-apply/create'),
            onBack: _popToNative,
          ),
          body: const ExpenseApplyListPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/expense-apply/detail/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: ExpenseApplyDetailPage(
            billNo: state.pathParameters['billNo']!,
            queryId:
                int.tryParse(state.uri.queryParameters['queryId'] ?? '0') ?? 0,
          ),
        ),
      ),
    ),
    GoRoute(
      path: '/expense-apply/create',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        canPop: false,
        child: AppScaffold(
          navConfig: NavBarConfig(showBack: true),
          body: ExpenseApplyCreatePage(id: state.uri.queryParameters['id']),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),
    GoRoute(
      path: '/expense-apply/edit/:billNo',
      pageBuilder: (context, state) => MaterialPage(
        key: ValueKey(state.uri.toString()),
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: ExpenseApplyEditPage(billNo: state.pathParameters['billNo']!),
          resizeToAvoidBottomInset: false,
        ),
      ),
    ),

    // ── 报表 ──
    GoRoute(
      path: '/report/expense-detail',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const ExpenseDetailReportPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/report/expense-apply-detail',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const ExpenseApplyDetailReportPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/report/overtime-apply-detail',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const OvertimeDetailReportPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/report/vehicle-apply-detail',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const VehicleDetailReportPage(),
        ),
      ),
    ),
    GoRoute(
      path: '/report/outing-log-detail',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const OutingLogDetailReportPage(),
        ),
      ),
    ),

    // ── 管理 ──
    GoRoute(
      path: '/admin/permissions',
      pageBuilder: (context, _) => MaterialPage(
        child: AppScaffold(
          navConfig: NavBarConfig(
            showBack: true,
            onBack: () => _smartBack(context),
          ),
          body: const AdminPermissionsPage(),
        ),
      ),
    ),
  ],
);