/// App Router Configuration
///
/// Centralized routing configuration using go_router.
/// Defines all routes, navigation guards, and deep linking.
library;

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:worker/features/cart/presentation/pages/cart_page.dart';
import 'package:worker/features/favorites/presentation/pages/favorites_page.dart';
import 'package:worker/features/loyalty/presentation/pages/rewards_page.dart';
import 'package:worker/features/main/presentation/pages/main_scaffold.dart';
import 'package:worker/features/orders/presentation/pages/order_detail_page.dart';
import 'package:worker/features/orders/presentation/pages/orders_page.dart';
import 'package:worker/features/orders/presentation/pages/payment_detail_page.dart';
import 'package:worker/features/orders/presentation/pages/payments_page.dart';
import 'package:worker/features/products/presentation/pages/product_detail_page.dart';
import 'package:worker/features/products/presentation/pages/products_page.dart';
import 'package:worker/features/promotions/presentation/pages/promotion_detail_page.dart';

/// App Router
///
/// Handles navigation throughout the app using declarative routing.
/// Features:
/// - Named routes for type-safe navigation
/// - Authentication guards (TODO: implement when auth is ready)
/// - Deep linking support
/// - Transition animations
class AppRouter {
  /// Router configuration
  static final GoRouter router = GoRouter(
    // Initial route
    initialLocation: RouteNames.home,

    // Route definitions
    routes: [
      // Main Route (with bottom navigation)
      GoRoute(
        path: RouteNames.home,
        name: RouteNames.home,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const MainScaffold(),
        ),
      ),

      // Products Route (full screen, no bottom nav)
      GoRoute(
        path: RouteNames.products,
        name: RouteNames.products,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const ProductsPage(),
        ),
      ),

      // Product Detail Route
      GoRoute(
        path: RouteNames.productDetail,
        name: RouteNames.productDetail,
        pageBuilder: (context, state) {
          final productId = state.pathParameters['id'];
          return MaterialPage(
            key: state.pageKey,
            child: ProductDetailPage(productId: productId ?? ''),
          );
        },
      ),

      // Promotion Detail Route
      GoRoute(
        path: RouteNames.promotionDetail,
        name: RouteNames.promotionDetail,
        pageBuilder: (context, state) {
          final promotionId = state.pathParameters['id'];
          return MaterialPage(
            key: state.pageKey,
            child: PromotionDetailPage(promotionId: promotionId),
          );
        },
      ),

      // Cart Route
      GoRoute(
        path: RouteNames.cart,
        name: RouteNames.cart,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const CartPage(),
        ),
      ),

      // Favorites Route
      GoRoute(
        path: RouteNames.favorites,
        name: RouteNames.favorites,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const FavoritesPage(),
        ),
      ),

      // Loyalty Rewards Route
      GoRoute(
        path: '/loyalty/rewards',
        name: 'loyalty_rewards',
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const RewardsPage(),
        ),
      ),

      // Orders Route
      GoRoute(
        path: RouteNames.orders,
        name: RouteNames.orders,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const OrdersPage(),
        ),
      ),

      // Order Detail Route
      GoRoute(
        path: RouteNames.orderDetail,
        name: RouteNames.orderDetail,
        pageBuilder: (context, state) {
          final orderId = state.pathParameters['id'];
          return MaterialPage(
            key: state.pageKey,
            child: OrderDetailPage(orderId: orderId ?? ''),
          );
        },
      ),

      // Payments Route
      GoRoute(
        path: RouteNames.payments,
        name: RouteNames.payments,
        pageBuilder: (context, state) => MaterialPage(
          key: state.pageKey,
          child: const PaymentsPage(),
        ),
      ),

      // Payment Detail Route
      GoRoute(
        path: RouteNames.paymentDetail,
        name: RouteNames.paymentDetail,
        pageBuilder: (context, state) {
          final invoiceId = state.pathParameters['id'];
          return MaterialPage(
            key: state.pageKey,
            child: PaymentDetailPage(invoiceId: invoiceId ?? ''),
          );
        },
      ),

      // TODO: Add more routes as features are implemented
    ],

    // Error page for unknown routes
    errorPageBuilder: (context, state) => MaterialPage(
      key: state.pageKey,
      child: Scaffold(
        appBar: AppBar(
          title: const Text('Không tìm thấy trang'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const Icon(
                Icons.error_outline,
                size: 64,
                color: Colors.red,
              ),
              const SizedBox(height: 16),
              const Text(
                'Trang không tồn tại',
                style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 8),
              Text(
                state.uri.toString(),
                style: const TextStyle(color: Colors.grey),
              ),
              const SizedBox(height: 24),
              ElevatedButton.icon(
                onPressed: () => context.go(RouteNames.home),
                icon: const Icon(Icons.home),
                label: const Text('Về trang chủ'),
              ),
            ],
          ),
        ),
      ),
    ),

    // Redirect logic for authentication (TODO: implement when auth is ready)
    // redirect: (context, state) {
    //   final isLoggedIn = false; // TODO: Get from auth provider
    //   final isOnLoginPage = state.matchedLocation == RouteNames.login;
    //
    //   if (!isLoggedIn && !isOnLoginPage) {
    //     return RouteNames.login;
    //   }
    //
    //   if (isLoggedIn && isOnLoginPage) {
    //     return RouteNames.home;
    //   }
    //
    //   return null;
    // },

    // Debug logging (disable in production)
    debugLogDiagnostics: true,
  );
}

/// Route Names
///
/// Centralized route name constants for type-safe navigation.
/// Use these constants instead of hardcoded strings.
///
/// Example:
/// ```dart
/// context.go(RouteNames.home);
/// context.push(RouteNames.products);
/// ```
class RouteNames {
  // Private constructor to prevent instantiation
  RouteNames._();

  // Main Routes
  static const String home = '/';
  static const String products = '/products';
  static const String productDetail = '/products/:id';
  static const String cart = '/cart';
  static const String favorites = '/favorites';
  static const String checkout = '/checkout';
  static const String orderSuccess = '/order-success';

  // Loyalty Routes
  static const String loyalty = '/loyalty';
  static const String rewards = '/loyalty/rewards';
  static const String pointsHistory = '/loyalty/points-history';
  static const String myGifts = '/loyalty/gifts';
  static const String referral = '/loyalty/referral';

  // Orders & Payments Routes
  static const String orders = '/orders';
  static const String orderDetail = '/orders/:id';
  static const String payments = '/payments';
  static const String paymentDetail = '/payments/:id';

  // Projects & Quotes Routes
  static const String projects = '/projects';
  static const String projectDetail = '/projects/:id';
  static const String projectCreate = '/projects/create';
  static const String quotes = '/quotes';
  static const String quoteDetail = '/quotes/:id';
  static const String quoteCreate = '/quotes/create';

  // Account Routes
  static const String account = '/account';
  static const String profile = '/account/profile';
  static const String addresses = '/account/addresses';
  static const String addressForm = '/account/addresses/form';
  static const String changePassword = '/account/change-password';
  static const String settings = '/account/settings';

  // Promotions & Notifications Routes
  static const String promotions = '/promotions';
  static const String promotionDetail = '/promotions/:id';
  static const String notifications = '/notifications';

  // Chat Route
  static const String chat = '/chat';

  // Authentication Routes (TODO: implement when auth feature is ready)
  static const String login = '/login';
  static const String otpVerification = '/otp-verification';
  static const String register = '/register';
}

/// Route Extensions
///
/// Helper extensions for common navigation patterns.
extension GoRouterExtension on BuildContext {
  /// Navigate to home page
  void goHome() => go(RouteNames.home);

  /// Navigate to products page
  void goProducts() => go(RouteNames.products);

  /// Navigate to cart page
  void goCart() => go(RouteNames.cart);

  /// Navigate to favorites page
  void goFavorites() => go(RouteNames.favorites);

  /// Navigate to loyalty page
  void goLoyalty() => go(RouteNames.loyalty);

  /// Navigate to orders page
  void goOrders() => go(RouteNames.orders);

  /// Navigate to projects page
  void goProjects() => go(RouteNames.projects);

  /// Navigate to account page
  void goAccount() => go(RouteNames.account);

  /// Navigate to promotions page
  void goPromotions() => go(RouteNames.promotions);

  /// Navigate to notifications page
  void goNotifications() => go(RouteNames.notifications);

  /// Navigate to chat page
  void goChat() => go(RouteNames.chat);
}