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

import '../../routing/app_router.dart';

/// Main application scaffold with adaptive navigation.
class AppScaffold extends StatelessWidget {
  const AppScaffold({super.key, required this.child});

  final Widget child;

  @override
  Widget build(BuildContext context) {
    // TODO: Replace AdaptiveScaffold with custom layout per UI_LAYOUT.md
    // - Header with room tabs (not bottom/rail nav)
    // - Chat dock on right side
    return AdaptiveScaffold(
      selectedIndex: _selectedIndex(context),
      onSelectedIndexChange: (index) => _onNavSelected(context, index),
      destinations: const [
        NavigationDestination(
          icon: Icon(Icons.door_front_door_outlined),
          selectedIcon: Icon(Icons.door_front_door),
          label: 'Front Hall',
        ),
        NavigationDestination(
          icon: Icon(Icons.dns_outlined),
          selectedIcon: Icon(Icons.dns),
          label: 'Control Room',
        ),
        NavigationDestination(
          icon: Icon(Icons.weekend_outlined),
          selectedIcon: Icon(Icons.weekend),
          label: 'Parlor',
        ),
        NavigationDestination(
          icon: Icon(Icons.settings_outlined),
          selectedIcon: Icon(Icons.settings),
          label: 'Settings',
        ),
      ],
      body: (_) => child,
      smallBody: (_) => child,
      useDrawer: false,
    );
  }

  int _selectedIndex(BuildContext context) {
    final location = GoRouterState.of(context).matchedLocation;

    if (location.startsWith(AppRoutes.controlRoom)) return 1;
    if (location.startsWith(AppRoutes.parlor)) return 2;
    if (location.startsWith(AppRoutes.settings)) return 3;
    return 0; // Front Hall
  }

  void _onNavSelected(BuildContext context, int index) {
    final route = switch (index) {
      0 => AppRoutes.frontHall,
      1 => AppRoutes.controlRoom,
      2 => AppRoutes.parlor,
      3 => AppRoutes.settings,
      _ => AppRoutes.frontHall,
    };
    context.go(route);
  }
}