🏗️ EventModule for Microfrontends: How to Build a City of Apps!

🏙️ MY APP-CITY:
┌─────────────────────────────────────────┐
│  🏪 Shopping     🏥 Health     🎮 Games │
│     App            App         App      │
│                                         │
│  🏦 Banking      📚 School    📱 Chat   │
│     App            App         App      │
└─────────────────────────────────────────┘

🏪 Shopping Island     🏥 Health Island     🎮 Games Island
     "Help!"              "Hello? Hello?"      "Anyone there?"
       |                     |                    |
   💔 Alone             💔 Alone            💔 Alone

🏪 Shopping ←→ 📞 MAGICAL ←→ 🏥 Health
               TELEPHONE
🎮 Games   ←→   CENTRAL  ←→ 🏦 Banking

👦 John: "I want to buy Minecraft!"
   ↓
🏪 Shopping App: "Ok! Selling Minecraft for $30"
   ↓ 📢 (shouts to the whole city)
   💬 "PurchaseEvent: John bought Minecraft for $30!"
   ↓
📞 EventModule Telephone Central spreads the news:
   ↓                    ↓                    ↓
🏦 Banking App:      🎮 Games App:       📱 Chat App:
"Charging $30       "Unlocking          "John bought
 from John's account" Minecraft"          a game!"

// 👦 John's birthday!
ModularEvent.fire(BirthdayEvent(
  name: 'John',
  age: 10,
  date: DateTime.now(),
));

// 🎮 John leveled up!
ModularEvent.fire(AchievementEvent(
  player: 'John',
  achievement: 'First Boss Defeated',
  points: 1000,
));

❌ Monolithic App (One giant city):
🏗️ █████████████████████ 20 seconds to load

✅ Microfrontends (Small neighborhoods):
🏪 ███ 3 seconds - Shopping
🎮 ███ 3 seconds - Games  
🏦 ███ 3 seconds - Banking

🏪 Shopping Team:
👨‍💻 Peter (Sales expert)
👩‍💻 Anna (Product expert)

🎮 Games Team:  
👨‍💻 Carlos (Games expert)
👩‍💻 Maria (Fun expert)

🏦 Banking Team:
👨‍💻 John (Money expert)
👩‍💻 Sara (Security expert)

🔨 Shopping renovation:
┌─────────────────────┐
│ 🏪 Shopping App     │ ← Only change here!
│    (under construction) │
└─────────────────────┘
│
🎮 Games   🏦 Banking   📱 Chat
 (normal)   (normal)    (normal)

🌎 Brazil Server:       🌍 USA Server:        🌏 Japan Server:
🏪 Shopping Brazil      🎮 Games Global       🎌 Anime Store
🏦 Banking Brazil       📱 Chat Global        🍱 Food Delivery

// 🏪 Shopping District
class ShoppingModule extends EventModule {
  @override
  void listen() {
    on<WantToBuyEvent>((WantToBuyEvent event, BuildContext? context) {
      print('🛍️ ${event.person} wants to buy ${event.item}');
      // Process sale...
      ModularEvent.fire(PurchaseCompletedEvent(
        buyer: event.person,
        item: event.item,
        price: event.price,
      ));
    });
  }
}
 
// 🎮 Gaming District  
class GamesModule extends EventModule {
  @override
  void listen() {
    on<PurchaseCompletedEvent>((PurchaseCompletedEvent event, BuildContext? context) {
      if (event.item.contains('Game')) {
        print('🎮 Unlocking game ${event.item} for ${event.buyer}');
        ModularEvent.fire(GameUnlockedEvent(
          player: event.buyer,
          game: event.item,
        ));
      }
    });
  }
}

// 📞 City Telephone Central
class CityApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: '🏙️ My City App',
      routerConfig: GoRouterModular.routerConfig,
    );
  }
}
 
// 🏛️ City Hall (Main Module)
class CityModule extends Module {
  @override
  List<Module> get imports => [
    ShoppingModule(),    // 🏪 Shopping District
    GamesModule(),       // 🎮 Gaming District
    BankingModule(),     // 🏦 Banking District
    ChatModule(),        // 📱 Chat District
  ];
 
  @override
  List<ModularRoute> get routes => [
    ChildRoute('/', child: (context, state) => CityHomePage()),
  ];
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  // 🎭 Activating the magical telephone central!
  await GoRouterModular.configure(
    appModule: CityModule(),
    initialRoute: '/',
    debugLogEventBus: true, // See the magic happening!
  );
  
  runApp(CityApp());
}

// 🎮 Games and achievements
class GameLevelUpEvent {
  final String player;
  final int newLevel;
  final int experience;
}
 
class AchievementUnlockedEvent {
  final String player;
  final String achievement;
  final int points;
}
 
// 🎵 Music and entertainment  
class MusicPlayEvent {
  final String song;
  final String artist;
  final String genre;
}

// 🏦 Banking and payments
class MoneyTransferEvent {
  final String from;
  final String to;
  final double amount;
  final String reason;
}
 
class BalanceUpdatedEvent {
  final String userId;
  final double newBalance;
  final String transaction;
}

// 🛒 Shopping and products
class AddToCartEvent {
  final String userId;
  final String productId;
  final String productName;
  final double price;
}
 
class CheckoutEvent {
  final String userId;
  final List<String> items;
  final double totalPrice;
}