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

import 'core/storage/secure_storage.dart';
import 'core/constants/app_constants.dart';
import 'injection_container.dart';

// Auth
import 'features/server_connect/presentation/screens/server_connect_screen.dart';
import 'features/auth/presentation/screens/splash_screen.dart';
import 'features/auth/presentation/screens/login_screen.dart';
import 'features/auth/presentation/screens/register_screen.dart';

// User shell + screens
import 'shared/widgets/user_shell.dart';
import 'features/walk_guide/presentation/screens/walk_guide_screen.dart';
import 'features/sos/presentation/screens/sos_screen.dart';
import 'features/activity_log/presentation/screens/activity_log_screen.dart';
import 'features/notifications/presentation/screens/notification_screen.dart';
import 'features/navigation_mode/presentation/screens/navigation_mode_screen.dart';
import 'features/settings/presentation/screens/user_settings_screen.dart';

// Guardian shell + screens
import 'shared/widgets/guardian_shell.dart';
import 'features/guardian/presentation/screens/guardian_dashboard_screen.dart';
import 'features/guardian/presentation/screens/guardian_map_screen.dart';
import 'features/guardian/presentation/screens/guardian_activity_log_screen.dart';
import 'features/guardian/presentation/screens/guardian_send_notif_screen.dart';
import 'features/guardian/presentation/screens/guardian_ai_config_screen.dart';
import 'features/guardian/presentation/screens/guardian_voice_cmd_screen.dart';
import 'features/guardian/presentation/screens/guardian_shortcut_screen.dart';
import 'features/guardian/presentation/screens/guardian_geofence_screen.dart';
import 'features/pairing/presentation/screens/guardian_pairing_screen.dart';
import 'features/pairing/presentation/screens/user_pairing_screen.dart';

// Call
import 'features/call/presentation/screens/call_screen.dart';
import 'features/call/presentation/screens/incoming_call_screen.dart';

final GoRouter appRouter = GoRouter(
  initialLocation: '/splash',
  redirect: (context, state) async {
    final serverUrl = await AppConstants.getServerUrl();
    final path = state.matchedLocation;

    // 1. No server URL → must go to server-connect
    if (serverUrl == null || serverUrl.isEmpty) {
      if (path != '/server-connect') return '/server-connect';
      return null;
    }

    // 2. Already on server-connect but has URL → splash
    if (path == '/server-connect') return '/splash';

    return null;
  },
  routes: [
    GoRoute(
      path: '/server-connect',
      builder: (context, state) => const ServerConnectScreen(),
    ),
    GoRoute(
      path: '/splash',
      builder: (context, state) => const SplashScreen(),
    ),
    GoRoute(
      path: '/login',
      builder: (context, state) => const LoginScreen(),
    ),
    GoRoute(
      path: '/register',
      builder: (context, state) => const RegisterScreen(),
    ),
    GoRoute(
      path: '/incoming-call',
      builder: (context, state) => const IncomingCallScreen(),
    ),

    // ── USER SHELL ──────────────────────────────────────────────────────────
    ShellRoute(
      builder: (context, state, child) => UserShell(child: child),
      routes: [
        GoRoute(path: '/user/walkguide',    builder: (c, s) => const WalkGuideScreen()),
        GoRoute(path: '/user/sos',          builder: (c, s) => const SosScreen()),
        GoRoute(path: '/user/activity',     builder: (c, s) => const ActivityLogScreen()),
        GoRoute(path: '/user/notifications',builder: (c, s) => const NotificationScreen()),
        GoRoute(path: '/user/navigation',   builder: (c, s) => const NavigationModeScreen()),
        GoRoute(path: '/user/settings',     builder: (c, s) => const UserSettingsScreen()),
        GoRoute(path: '/user/pairing',      builder: (c, s) => const UserPairingScreen()),
        GoRoute(path: '/user/call',         builder: (c, s) => const CallScreen()),
      ],
    ),

    // ── GUARDIAN SHELL ──────────────────────────────────────────────────────
    ShellRoute(
      builder: (context, state, child) => GuardianShell(child: child),
      routes: [
        GoRoute(path: '/guardian/dashboard', builder: (c, s) => const GuardianDashboardScreen()),
        GoRoute(path: '/guardian/map',        builder: (c, s) => const GuardianMapScreen()),
        GoRoute(path: '/guardian/logs',       builder: (c, s) => const GuardianActivityLogScreen()),
        GoRoute(path: '/guardian/send-notif', builder: (c, s) => const GuardianSendNotifScreen()),
        GoRoute(path: '/guardian/ai-config',  builder: (c, s) => const GuardianAiConfigScreen()),
        GoRoute(path: '/guardian/voice-cmd',  builder: (c, s) => const GuardianVoiceCmdScreen()),
        GoRoute(path: '/guardian/shortcuts',  builder: (c, s) => const GuardianShortcutScreen()),
        GoRoute(path: '/guardian/geofence',   builder: (c, s) => const GuardianGeofenceScreen()),
        GoRoute(path: '/guardian/pairing',    builder: (c, s) => const GuardianPairingScreen()),
      ],
    ),
  ],
);