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

import '../router/app_router.dart';
import '../theme/app_colors.dart';
import 'wallet_chip.dart';

/// Coque principale — navigation + solde visible (style WashOnline amélioré).
class MainShell extends ConsumerWidget {
  const MainShell({super.key, required this.child});

  final Widget child;

  static int _indexFromLocation(String location) {
    if (location.startsWith(AppRoutes.bookings)) return 1;
    if (location.startsWith(AppRoutes.washes)) return 2;
    if (location.startsWith(AppRoutes.wallet)) return 3;
    if (location.startsWith(AppRoutes.profile)) return 4;
    return 0;
  }

  static String _titleFromLocation(String location) {
    if (location.startsWith(AppRoutes.bookings)) return 'Réservations';
    if (location.startsWith(AppRoutes.washes)) return 'Mes lavages';
    if (location.startsWith(AppRoutes.wallet)) return 'Portefeuille';
    if (location.startsWith(AppRoutes.profile)) return 'Mon profil';
    return 'Accueil';
  }

  static bool _showScanFab(String location) {
    return location.startsWith(AppRoutes.bookings) ||
        location.startsWith(AppRoutes.washes);
  }

  void _onTabTap(BuildContext context, int index) {
    switch (index) {
      case 0:
        context.go(AppRoutes.home);
      case 1:
        context.go(AppRoutes.bookings);
      case 2:
        context.go(AppRoutes.washes);
      case 3:
        context.go(AppRoutes.wallet);
      case 4:
        context.go(AppRoutes.profile);
    }
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final location = GoRouterState.of(context).uri.toString();
    final selectedIndex = _indexFromLocation(location);
    final showScanFab = _showScanFab(location);

    return Scaffold(
      backgroundColor: AppColors.background,
      appBar: AppBar(
        title: Text(_titleFromLocation(location)),
        actions: const [WalletChip()],
      ),
      body: child,
      floatingActionButton: showScanFab
          ? FloatingActionButton.extended(
              onPressed: () => context.push(AppRoutes.washScan),
              icon: const Icon(Icons.qr_code_scanner_rounded),
              label: const Text('Scanner'),
            )
          : null,
      bottomNavigationBar: NavigationBar(
        selectedIndex: selectedIndex,
        onDestinationSelected: (index) => _onTabTap(context, index),
        destinations: const [
          NavigationDestination(
            icon: Icon(Icons.home_outlined),
            selectedIcon: Icon(Icons.home_rounded),
            label: 'Accueil',
          ),
          NavigationDestination(
            icon: Icon(Icons.event_outlined),
            selectedIcon: Icon(Icons.event),
            label: 'Résa',
          ),
          NavigationDestination(
            icon: Icon(Icons.local_laundry_service_outlined),
            selectedIcon: Icon(Icons.local_laundry_service),
            label: 'Lavages',
          ),
          NavigationDestination(
            icon: Icon(Icons.account_balance_wallet_outlined),
            selectedIcon: Icon(Icons.account_balance_wallet),
            label: 'Wallet',
          ),
          NavigationDestination(
            icon: Icon(Icons.person_outline),
            selectedIcon: Icon(Icons.person),
            label: 'Profil',
          ),
        ],
      ),
    );
  }
}