worker/lib/features/main/presentation/pages/main_scaffold.dart

/// Main Scaffold with Bottom Navigation
///
/// Root navigation wrapper that manages the bottom navigation bar
/// and displays different pages based on the selected tab.
library;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:worker/core/theme/colors.dart';
import 'package:worker/features/home/presentation/pages/home_page.dart';
import 'package:worker/features/main/presentation/providers/current_page_provider.dart';
import 'package:worker/features/promotions/presentation/pages/promotions_page.dart';

/// Main Scaffold Page
///
/// Manages bottom navigation and page switching for:
/// - Home (index 0)
/// - Loyalty (index 1) - Coming soon
/// - Promotions (index 2)
/// - Notifications (index 3) - Coming soon
/// - Account (index 4) - Coming soon
class MainScaffold extends ConsumerWidget {
  const MainScaffold({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final currentIndex = ref.watch(currentPageIndexProvider);

    // Define pages
    final pages = [
      const HomePage(),
      _buildComingSoonPage('Hội viên'), // Loyalty
      const PromotionsPage(),
      _buildComingSoonPage('Thông báo'), // Notifications
      _buildComingSoonPage('Cài đặt'), // Account
    ];

    return Scaffold(
      body: IndexedStack(
        index: currentIndex,
        children: pages,
      ),
      floatingActionButton: currentIndex == 0
          ? Padding(
              padding: const EdgeInsets.only(bottom: 20),
              child: FloatingActionButton(
                onPressed: () {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(
                      content: Text('Chat - Đang phát triển'),
                      duration: Duration(seconds: 1),
                    ),
                  );
                },
                backgroundColor: AppColors.accentCyan,
                elevation: 8,
                child: const Icon(Icons.chat_bubble, size: 24, color: Colors.white),
              ),
            )
          : null,
      bottomNavigationBar: Container(
        decoration: BoxDecoration(
          color: Colors.white,
          boxShadow: [
            BoxShadow(
              color: Colors.black.withValues(alpha: 0.05),
              blurRadius: 10,
              offset: const Offset(0, -2),
            ),
          ],
        ),
        child: SafeArea(
          child: SizedBox(
            height: 70,
            child: BottomNavigationBar(
              type: BottomNavigationBarType.fixed,
              backgroundColor: Colors.white,
              selectedItemColor: AppColors.primaryBlue,
              unselectedItemColor: const Color(0xFF666666),
              selectedFontSize: 11,
              unselectedFontSize: 11,
              iconSize: 24,
              currentIndex: currentIndex,
              elevation: 0,
              items: [
                const BottomNavigationBarItem(
                  icon: Icon(Icons.home),
                  label: 'Trang chủ',
                ),
                const BottomNavigationBarItem(
                  icon: Icon(Icons.loyalty),
                  label: 'Hội viên',
                ),
                const BottomNavigationBarItem(
                  icon: Icon(Icons.local_offer),
                  label: 'Khuyến mãi',
                ),
                BottomNavigationBarItem(
                  icon: Stack(
                    clipBehavior: Clip.none,
                    children: [
                      const Icon(Icons.notifications),
                      Positioned(
                        top: -4,
                        right: -4,
                        child: Container(
                          padding: const EdgeInsets.symmetric(
                            horizontal: 6,
                            vertical: 2,
                          ),
                          decoration: BoxDecoration(
                            color: AppColors.danger,
                            borderRadius: BorderRadius.circular(12),
                          ),
                          constraints: const BoxConstraints(
                            minWidth: 20,
                            minHeight: 20,
                          ),
                          child: const Text(
                            '5',
                            style: TextStyle(
                              color: Colors.white,
                              fontSize: 11,
                              fontWeight: FontWeight.w700,
                            ),
                            textAlign: TextAlign.center,
                          ),
                        ),
                      ),
                    ],
                  ),
                  label: 'Thông báo',
                ),
                const BottomNavigationBarItem(
                  icon: Icon(Icons.account_circle),
                  label: 'Cài đặt',
                ),
              ],
              onTap: (index) {
                ref.read(currentPageIndexProvider.notifier).setIndex(index);
              },
            ),
          ),
        ),
      ),
    );
  }

  /// Build coming soon placeholder page
  Widget _buildComingSoonPage(String title) {
    return Scaffold(
      backgroundColor: const Color(0xFFF4F6F8),
      body: SafeArea(
        child: Column(
          children: [
            // Header
            Container(
              width: double.infinity,
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
              decoration: BoxDecoration(
                color: Colors.white,
                boxShadow: [
                  BoxShadow(
                    color: Colors.black.withValues(alpha: 0.05),
                    blurRadius: 8,
                    offset: const Offset(0, 2),
                  ),
                ],
              ),
              child: Text(
                title,
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.bold,
                  color: Color(0xFF212121),
                ),
              ),
            ),
            // Coming soon content
            Expanded(
              child: Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Icon(
                      Icons.construction,
                      size: 80,
                      color: AppColors.grey500.withValues(alpha: 0.5),
                    ),
                    const SizedBox(height: 16),
                    const Text(
                      'Đang phát triển',
                      style: TextStyle(
                        fontSize: 20,
                        fontWeight: FontWeight.w600,
                        color: AppColors.grey500,
                      ),
                    ),
                    const SizedBox(height: 8),
                    const Text(
                      'Tính năng này sẽ sớm ra mắt',
                      style: TextStyle(
                        fontSize: 14,
                        color: AppColors.grey500,
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}