import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';

import '../ui/features/auth/login_page.dart';
import '../ui/features/evidence/evidence_page.dart';
import '../ui/features/preflight/preflight_page.dart';
import '../ui/features/profile/profile_page.dart';
import '../ui/features/work/work_detail_page.dart';
import '../ui/features/work/work_list_page.dart';
import 'dependencies.dart';

GoRouter createRouter(AppDependencies dependencies) => GoRouter(
  initialLocation: '/preflight',
  refreshListenable: dependencies.session,
  redirect: (context, state) {
    final login = state.matchedLocation == '/login';
    if (!dependencies.session.isAuthenticated && !login) return '/login';
    if (dependencies.session.isAuthenticated && login) return '/preflight';
    return null;
  },
  routes: [
    GoRoute(
      path: '/login',
      builder: (context, state) => LoginPage(session: dependencies.session),
    ),
    GoRoute(
      path: '/preflight',
      builder: (context, state) => PreflightPage(
        session: dependencies.session,
        repository: dependencies.repository,
      ),
    ),
    GoRoute(
      path: '/tasks/:identity',
      builder: (context, state) => WorkDetailPage(
        session: dependencies.session,
        repository: dependencies.repository,
        drafts: dependencies.drafts,
        identity: state.pathParameters['identity']!,
      ),
      routes: [
        GoRoute(
          path: 'evidence',
          builder: (context, state) => EvidencePage(
            session: dependencies.session,
            repository: dependencies.repository,
            drafts: dependencies.drafts,
            taskIdentity: state.pathParameters['identity']!,
          ),
        ),
      ],
    ),
    StatefulShellRoute.indexedStack(
      builder: (context, state, shell) => _ServiceShell(
        navigationShell: shell,
        roleCode: dependencies.session.roleCode,
      ),
      branches: [
        StatefulShellBranch(
          routes: [
            GoRoute(
              path: '/work',
              builder: (context, state) => WorkListPage(
                session: dependencies.session,
                repository: dependencies.repository,
                completed: false,
              ),
            ),
          ],
        ),
        StatefulShellBranch(
          routes: [
            GoRoute(
              path: '/records',
              builder: (context, state) => WorkListPage(
                session: dependencies.session,
                repository: dependencies.repository,
                completed: true,
              ),
            ),
          ],
        ),
        StatefulShellBranch(
          routes: [
            GoRoute(
              path: '/me',
              builder: (context, state) => ProfilePage(
                session: dependencies.session,
                repository: dependencies.repository,
                drafts: dependencies.drafts,
              ),
            ),
          ],
        ),
      ],
    ),
  ],
);

class _ServiceShell extends StatelessWidget {
  const _ServiceShell({required this.navigationShell, required this.roleCode});

  final StatefulNavigationShell navigationShell;
  final String roleCode;

  @override
  Widget build(BuildContext context) => Scaffold(
    body: navigationShell,
    bottomNavigationBar: NavigationBar(
      selectedIndex: navigationShell.currentIndex,
      onDestinationSelected: (index) => navigationShell.goBranch(
        index,
        initialLocation: index == navigationShell.currentIndex,
      ),
      destinations: [
        NavigationDestination(
          icon: Icon(
            roleCode == 'delivery' ? Icons.local_shipping_outlined : Icons.assignment_outlined,
          ),
          selectedIcon: Icon(roleCode == 'delivery' ? Icons.local_shipping : Icons.assignment),
          label: roleCode == 'delivery'
              ? '配送'
              : roleCode == 'operations'
              ? '安检'
              : '工单',
        ),
        const NavigationDestination(
          icon: Icon(Icons.history),
          selectedIcon: Icon(Icons.history_toggle_off),
          label: '记录',
        ),
        const NavigationDestination(
          icon: Icon(Icons.person_outline),
          selectedIcon: Icon(Icons.person),
          label: '我的',
        ),
      ],
    ),
  );
}