complete consoleMenu class

.gitignore

@@ -2,6 +2,8 @@
 # Compiled class file
 *.class
 
+.idea/
+
 # Log file
 *.log
 

database.sql

@@ -1,141 +1,53 @@
 -- Restaurant Database Management System
---
--- Instructions:
--- 1. Create all required tables.
--- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
--- 3. Add suitable constraints based on the requirements.
--- 4. Insert initial mock data.
--- 5. Insert at least 3 menu items.
--- 6. The script should be executable from start to finish without errors.
-
-
 
 -- =======================================================
 -- USER TABLE
 -- =======================================================
---
+CREATE TABLE users (
--- Represents customers using the system.
+                       id            SERIAL PRIMARY KEY,
---
+                       username      VARCHAR(50)  NOT NULL UNIQUE,
--- Required information:
+                       password_hash VARCHAR(255) NOT NULL,
--- - Unique identifier
+                       email         VARCHAR(100)
--- - Username
+);
--- - Password
--- - Email (optional)
---
--- Requirements:
--- - Each user must have a unique identifier.
--- - Usernames must be unique.
--- - Username and password are required.
--- - Passwords should not be stored in plain text.
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- MENU ITEM TABLE
 -- =======================================================
---
+CREATE TABLE menu_items (
--- Represents available food and drink items.
+                            id          SERIAL PRIMARY KEY,
---
+                            name        VARCHAR(100)   NOT NULL,
--- Required information:
+                            description TEXT,
--- - Unique identifier
+                            price       NUMERIC(10, 2) NOT NULL CHECK (price > 0),
--- - Name
+                            category    VARCHAR(50)
--- - Description (optional)
+);
--- - Price
--- - Category (optional)
---
--- Requirements:
--- - Each menu item must have a unique identifier.
--- - Name is required.
--- - Price must always be positive.
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- ORDER TABLE
 -- =======================================================
---
+CREATE TABLE orders (
--- Represents orders placed by customers.
+                        id          SERIAL PRIMARY KEY,
---
+                        user_id     INT            NOT NULL REFERENCES users(id) ON DELETE CASCADE,
--- Required information:
+                        created_at  TIMESTAMP      NOT NULL DEFAULT NOW(),
--- - Unique identifier
+                        total_price NUMERIC(10, 2) NOT NULL CHECK (total_price >= 0)
--- - Reference to customer
+);
--- - Creation date and time
--- - Total price
---
--- Requirements:
--- - Each order must belong to exactly one user.
--- - A user can have multiple orders.
--- - The relationship between User and Order must be implemented.
---
--- Note:
--- Avoid using reserved SQL keywords as table names.
--- Consider using a name such as "orders" or "customer_orders".
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- ORDER DETAIL TABLE
 -- =======================================================
---
+CREATE TABLE order_details (
--- Represents items inside an order.
+                               id           SERIAL PRIMARY KEY,
---
+                               order_id     INT            NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
--- Required information:
+                               menu_item_id INT            NOT NULL REFERENCES menu_items(id),
--- - Unique identifier
+                               quantity     INT            NOT NULL CHECK (quantity > 0),
--- - Reference to an order
+                               unit_price   NUMERIC(10, 2) NOT NULL CHECK (unit_price > 0)
--- - Reference to a menu item
+);
--- - Quantity
--- - Item price at purchase time
---
--- Requirements:
--- - Each detail record must belong to one order.
--- - Each detail record must reference one menu item.
--- - Quantity must always be greater than zero.
--- - Store the item's price at the moment of purchase.
---
--- CREATE TABLE ...
-
-
 
 -- =======================================================
 -- INITIAL MENU DATA
 -- =======================================================
---
+INSERT INTO menu_items (name, description, price, category) VALUES
--- Insert at least 3 food or drink items.
+                                                                ('Margherita Pizza',  'Classic tomato sauce and mozzarella',   10.00, 'Pizza'),
---
+                                                                ('BBQ Burger',        'Juicy beef patty with BBQ sauce',         8.50, 'Burger'),
--- Example categories:
+                                                                ('Spaghetti Carbonara', 'Creamy pasta with pancetta and egg',   12.00, 'Pasta'),
--- - Pizza
+                                                                ('Tiramisu',          'Italian coffee dessert',                   5.50, 'Dessert'),
--- - Burger
+                                                                ('Cola',              'Ice-cold soft drink',                      2.50, 'Drink');
--- - Pasta
--- - Drink
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- OPTIONAL TEST DATA
--- =======================================================
---
--- You may insert sample users and orders for testing.
--- This section is optional.
---
--- INSERT INTO ...
-
-
-
--- =======================================================
--- VERIFICATION QUERIES
--- =======================================================
---
--- Uncomment these queries to verify your database.
---
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;
--- SELECT * FROM ...;

src/main/java/dev/dao/MenuItemDao.java

@@ -1,25 +1,59 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.MenuItem;
 
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class MenuItemDao {
 
     public List<MenuItem> findAll() {
+        List<MenuItem> items = new ArrayList<>();
+        String sql = "SELECT * FROM menu_items ORDER BY category, name";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve all menu items
+             PreparedStatement ps = conn.prepareStatement(sql);
+             ResultSet rs = ps.executeQuery()) {
 
-        return null;
+            while (rs.next()) {
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setDescription(rs.getString("description"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+                items.add(item);
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error fetching menu: " + e.getMessage());
+        }
+        return items;
     }
 
     public MenuItem findById(int id) {
+        String sql = "SELECT * FROM menu_items WHERE id = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        // TODO:
+            ps.setInt(1, id);
-        // Find menu item by id
+            ResultSet rs = ps.executeQuery();
 
+            if (rs.next()) {
+                MenuItem item = new MenuItem();
+                item.setId(rs.getInt("id"));
+                item.setName(rs.getString("name"));
+                item.setDescription(rs.getString("description"));
+                item.setPrice(rs.getDouble("price"));
+                item.setCategory(rs.getString("category"));
+                return item;
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error finding menu item: " + e.getMessage());
+        }
         return null;
     }
-
 }

src/main/java/dev/dao/OrderDao.java

@@ -1,25 +1,53 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.Order;
 
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDao {
 
     public int save(Order order) {
+        String sql = "INSERT INTO orders (user_id, total_price) VALUES (?, ?) RETURNING id";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        // TODO:
+            ps.setInt(1, order.getUserId());
-        // Insert order and return generated id
+            ps.setDouble(2, order.getTotalPrice());
+            ResultSet rs = ps.executeQuery();
 
+            if (rs.next()) return rs.getInt(1);  // return generated id
+
+        } catch (SQLException e) {
+            System.out.println("Error saving order: " + e.getMessage());
+        }
         return -1;
     }
 
     public List<Order> findByUserId(int userId) {
+        List<Order> orders = new ArrayList<>();
+        String sql = "SELECT * FROM orders WHERE user_id = ? ORDER BY created_at DESC";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve all orders of a user
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        return null;
+            ps.setInt(1, userId);
+            ResultSet rs = ps.executeQuery();
+
+            while (rs.next()) {
+                Order order = new Order();
+                order.setId(rs.getInt("id"));
+                order.setUserId(rs.getInt("user_id"));
+                order.setCreatedAt(rs.getTimestamp("created_at").toLocalDateTime());
+                order.setTotalPrice(rs.getDouble("total_price"));
+                orders.add(order);
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error fetching orders: " + e.getMessage());
+        }
+        return orders;
     }
-
 }

src/main/java/dev/dao/OrderDetailDao.java

@@ -1,24 +1,53 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.OrderDetail;
 
+import java.sql.*;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDetailDao {
 
     public void save(OrderDetail detail) {
+        String sql = "INSERT INTO order_details (order_id, menu_item_id, quantity, unit_price) VALUES (?, ?, ?, ?)";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        // TODO:
+            ps.setInt(1, detail.getOrderId());
-        // Insert order detail
+            ps.setInt(2, detail.getMenuItemId());
+            ps.setInt(3, detail.getQuantity());
+            ps.setDouble(4, detail.getPrice());
+            ps.executeUpdate();
 
+        } catch (SQLException e) {
+            System.out.println("Error saving order detail: " + e.getMessage());
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
+        List<OrderDetail> details = new ArrayList<>();
+        String sql = "SELECT * FROM order_details WHERE order_id = ?";
 
-        // TODO:
+        try (Connection conn = DatabaseConnection.getConnection();
-        // Retrieve order details
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        return null;
+            ps.setInt(1, orderId);
+            ResultSet rs = ps.executeQuery();
+
+            while (rs.next()) {
+                OrderDetail d = new OrderDetail();
+                d.setId(rs.getInt("id"));
+                d.setOrderId(rs.getInt("order_id"));
+                d.setMenuItemId(rs.getInt("menu_item_id"));
+                d.setQuantity(rs.getInt("quantity"));
+                d.setPrice(rs.getDouble("unit_price"));
+                details.add(d);
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error fetching order details: " + e.getMessage());
+        }
+        return details;
     }
-
 }

src/main/java/dev/dao/UserDao.java

@@ -1,23 +1,48 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.User;
 
+import java.sql.*;
+
 public class UserDao {
 
     public boolean save(User user) {
+        String sql = "INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        // TODO:
+            ps.setString(1, user.getUsername());
-        // Insert user into database
+            ps.setString(2, user.getPassword());
+            ps.setString(3, user.getEmail());
+            return ps.executeUpdate() > 0;
 
-        return false;
+        } catch (SQLException e) {
+            System.out.println("Error saving user: " + e.getMessage());
+            return false;
+        }
     }
 
     public User findByUsername(String username) {
+        String sql = "SELECT * FROM users WHERE username = ?";
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
 
-        // TODO:
+            ps.setString(1, username);
-        // Find a user by username
+            ResultSet rs = ps.executeQuery();
 
+            if (rs.next()) {
+                User user = new User();
+                user.setId(rs.getInt("id"));
+                user.setUsername(rs.getString("username"));
+                user.setPassword(rs.getString("password_hash"));
+                user.setEmail(rs.getString("email"));
+                return user;
+            }
+
+        } catch (SQLException e) {
+            System.out.println("Error finding user: " + e.getMessage());
+        }
         return null;
     }
-
 }

src/main/java/dev/database/DatabaseConnection.java

@@ -1,15 +1,16 @@
 package dev.database;
 
 import java.sql.Connection;
+import java.sql.DriverManager;
 import java.sql.SQLException;
 
 public class DatabaseConnection {
 
-    private static final String URL = "jdbc:postgresql://localhost:5432/restaurant_db"; // DB Server
+    private static final String URL = "jdbc:postgresql://localhost:5432/restaurant_db";
 
-    private static final String USER = "postgres"; // Your Username
+    private static final String USER = "postgres";
 
-    private static final String PASSWORD = "password"; // Your Password
+    private static final String PASSWORD = "password";
 
     private DatabaseConnection() {
 
@@ -18,10 +19,7 @@ public class DatabaseConnection {
     public static Connection getConnection()
             throws SQLException {
 
-        // TODO:
+        return DriverManager.getConnection(URL, USER, PASSWORD);
-        // Return a valid PostgreSQL connection
-
-        return null;
     }
 
 }

src/main/java/dev/model/MenuItem.java

@@ -1,15 +1,26 @@
 package dev.model;
 
 public class MenuItem {
-
+    private int    id;
-    private int id;
-
     private String name;
-
     private String description;
-
     private double price;
-
     private String category;
 
+    public MenuItem() {}
+
+    public int getId(){ return id; }
+    public void setId(int id){ this.id = id; }
+
+    public String getName(){ return name; }
+    public void setName(String n){ this.name = n; }
+
+    public String getDescription(){ return description; }
+    public void setDescription(String d){ this.description = d; }
+
+    public double getPrice(){ return price; }
+    public void setPrice(double p){ this.price = p; }
+
+    public String getCategory(){ return category; }
+    public void setCategory(String c){ this.category = c; }
 }

src/main/java/dev/model/Order.java

@@ -3,13 +3,28 @@ package dev.model;
 import java.time.LocalDateTime;
 
 public class Order {
-
     private int id;
-
     private int userId;
-
     private LocalDateTime createdAt;
-
     private double totalPrice;
 
+    public Order() {}
+
+    public Order(int userId, double totalPrice) {
+        this.userId = userId;
+        this.totalPrice = totalPrice;
+        this.createdAt = LocalDateTime.now();
+    }
+
+    public int getId(){ return id; }
+    public void setId(int id){ this.id = id; }
+
+    public int getUserId() { return userId; }
+    public void setUserId(int uid){ this.userId = uid; }
+
+    public LocalDateTime getCreatedAt(){ return createdAt; }
+    public void setCreatedAt(LocalDateTime t){ this.createdAt = t; }
+
+    public double getTotalPrice(){ return totalPrice; }
+    public void setTotalPrice(double p){ this.totalPrice = p; }
 }

src/main/java/dev/model/OrderDetail.java

@@ -1,15 +1,33 @@
 package dev.model;
 
 public class OrderDetail {
-
     private int id;
-
     private int orderId;
-
     private int menuItemId;
-
     private int quantity;
+    private double price;  // unit price at purchase time
 
-    private double price;
+    public OrderDetail() {}
 
+    public OrderDetail(int orderId, int menuItemId, int quantity, double price) {
+        this.orderId = orderId;
+        this.menuItemId = menuItemId;
+        this.quantity = quantity;
+        this.price = price;
+    }
+
+    public int getId(){ return id; }
+    public void setId(int id){ this.id = id; }
+
+    public int getOrderId(){ return orderId; }
+    public void setOrderId(int o){ this.orderId = o; }
+
+    public int getMenuItemId(){ return menuItemId; }
+    public void setMenuItemId(int m){ this.menuItemId = m; }
+
+    public int getQuantity(){ return quantity; }
+    public void setQuantity(int q){ this.quantity = q; }
+
+    public double getPrice(){ return price; }
+    public void setPrice(double p){ this.price = p; }
 }

src/main/java/dev/model/User.java

@@ -1,13 +1,28 @@
 package dev.model;
 
 public class User {
-
     private int id;
-
     private String username;
-
+    private String password;  // holds the hash when loaded from DB
-    private String password;
-
     private String email;
 
+    public User() {}
+
+    public User(String username, String password, String email) {
+        this.username = username;
+        this.password = password;
+        this.email = email;
+    }
+
+    public int getId(){ return id; }
+    public void setId(int id) { this.id = id; }
+
+    public String getUsername(){ return username; }
+    public void setUsername(String u){ this.username = u; }
+
+    public String getPassword() { return password; }
+    public void setPassword(String p){ this.password = p; }
+
+    public String getEmail(){ return email; }
+    public void setEmail(String e){ this.email = e; }
 }

src/main/java/dev/service/AuthService.java

@@ -1,23 +1,51 @@
 package dev.service;
 
+import dev.dao.UserDao;
 import dev.model.User;
 
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
 public class AuthService {
 
+    private final UserDao userDao = new UserDao();
+
+
+    private String hashPassword(String password) {
+        try {
+            MessageDigest md = MessageDigest.getInstance("SHA-256");
+            byte[] hash = md.digest(password.getBytes());
+            StringBuilder sb = new StringBuilder();
+            for (byte b : hash) sb.append(String.format("%02x", b));
+            return sb.toString();
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("Hashing error", e);
+        }
+    }
+
     public boolean register(String username, String password, String email) {
-
+        if (username == null || username.isBlank() || password == null || password.isBlank()) {
-        // TODO:
+            System.out.println("Username and password are required.");
-        // Validate and register user
+            return false;
-
+        }
-        return false;
+        if (userDao.findByUsername(username) != null) {
+            System.out.println("Username already taken.");
+            return false;
+        }
+        User user = new User(username, hashPassword(password), email.isBlank() ? null : email);
+        return userDao.save(user);
     }
 
     public User login(String username, String password) {
-
+        User user = userDao.findByUsername(username);
-        // TODO:
+        if (user == null) {
-        // Authenticate user
+            System.out.println("User not found.");
-
+            return null;
-        return null;
+        }
+        if (!user.getPassword().equals(hashPassword(password))) {
+            System.out.println("Incorrect password.");
+            return null;
+        }
+        return user;
     }
-
 }

src/main/java/dev/service/MenuService.java

@@ -1,12 +1,27 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.model.MenuItem;
+
+import java.util.List;
+
 public class MenuService {
 
-    public void showMenu() {
+    private final MenuItemDao menuItemDao = new MenuItemDao();
-
-        // TODO:
-        // Display menu items
 
+    public List<MenuItem> getMenuItems() {
+        return menuItemDao.findAll();
     }
 
+    public void showMenu() {
+        List<MenuItem> items = getMenuItems();
+        System.out.println("\n--- MENU ---");
+        System.out.printf("%-5s %-25s %-12s %s%n", "ID", "Name", "Price", "Category");
+        System.out.println("-".repeat(55));
+        for (MenuItem item : items) {
+            System.out.printf("%-5d %-25s $%-11.2f %s%n",
+                    item.getId(), item.getName(), item.getPrice(), item.getCategory());
+        }
+        System.out.println("-".repeat(55));
+    }
 }

src/main/java/dev/service/OrderService.java

@@ -1,26 +1,104 @@
 package dev.service;
 
+import dev.dao.MenuItemDao;
+import dev.dao.OrderDao;
+import dev.dao.OrderDetailDao;
+import dev.model.MenuItem;
+import dev.model.Order;
+import dev.model.OrderDetail;
+
+import java.util.*;
+
 public class OrderService {
 
+    private final MenuItemDao menuItemDao = new MenuItemDao();
+    private final OrderDao orderDao = new OrderDao();
+    private final OrderDetailDao orderDetailDao = new OrderDetailDao();
+    private final MenuService menuService = new MenuService();
+    private final Scanner scanner;
+
+    public OrderService(Scanner scanner) {
+        this.scanner = scanner;
+    }
     public void placeOrder(int userId) {
+        menuService.showMenu();
 
-        // TODO:
+        Map<Integer, int[]> cart = new LinkedHashMap<>();  // int[] = {quantity}
-        // Create order
+        Map<Integer, MenuItem> itemMap = new HashMap<>();
 
+        while (true) {
+            System.out.print("\nEnter item ID to add (0 to finish): ");
+            int id = scanner.nextInt();
+            if (id == 0) break;
+
+            MenuItem item = menuItemDao.findById(id);
+            if (item == null) {
+                System.out.println("Item not found, try again.");
+                continue;
+            }
+            System.out.print("Enter quantity: ");
+            int qty = scanner.nextInt();
+            if (qty <= 0) { System.out.println("Quantity must be > 0."); continue; }
+
+            cart.merge(id, new int[]{qty}, (a, b) -> new int[]{a[0] + b[0]});
+            itemMap.put(id, item);
+            System.out.printf("Added %dx %s%n", qty, item.getName());
+        }
+
+        if (cart.isEmpty()) { System.out.println("No items selected."); return; }
+
+        // Calculate total
+        double total = cart.entrySet().stream()
+                .mapToDouble(e -> itemMap.get(e.getKey()).getPrice() * e.getValue()[0])
+                .sum();
+
+        // Save order
+        Order order = new Order(userId, total);
+        int orderId = orderDao.save(order);
+        if (orderId == -1) { System.out.println("Failed to save order."); return; }
+
+        // Save order details
+        for (Map.Entry<Integer, int[]> entry : cart.entrySet()) {
+            MenuItem item = itemMap.get(entry.getKey());
+            OrderDetail detail = new OrderDetail(orderId, item.getId(), entry.getValue()[0], item.getPrice());
+            orderDetailDao.save(detail);
+        }
+
+        printReceipt(orderId);
     }
 
     public void printReceipt(int orderId) {
+        List<OrderDetail> details = orderDetailDao.findByOrderId(orderId);
+        System.out.println("\n--- RECEIPT ---");
+        System.out.printf("%-20s %5s  %8s  %8s%n", "Item", "Qty", "Unit", "Total");
+        System.out.println("-".repeat(47));
 
-        // TODO:
+        double grandTotal = 0;
-        // Print order receipt
+        for (OrderDetail d : details) {
+            MenuItem item = menuItemDao.findById(d.getMenuItemId());
+            String name = (item != null) ? item.getName() : "Unknown";
+            double subtotal = d.getPrice() * d.getQuantity();
+            grandTotal += subtotal;
+            System.out.printf("%-20s %5d  $%7.2f  $%7.2f%n",
+                    name, d.getQuantity(), d.getPrice(), subtotal);
+        }
 
+        System.out.println("-".repeat(47));
+        System.out.printf("%-20s %18s $%7.2f%n", "TOTAL", "", grandTotal);
+        System.out.println("Order saved successfully!");
     }
 
     public void showOrderHistory(int userId) {
+        List<Order> orders = orderDao.findByUserId(userId);
+        if (orders.isEmpty()) { System.out.println("No past orders."); return; }
 
-        // TODO:
+        System.out.println("\n--- ORDER HISTORY ---");
-        // Display user's order history
+        System.out.printf("%-8s %-25s %s%n", "Order#", "Date", "Total");
-
+        System.out.println("-".repeat(45));
+        for (Order o : orders) {
+            System.out.printf("%-8d %-25s $%.2f%n",
+                    o.getId(), o.getCreatedAt().toString().replace("T", " "), o.getTotalPrice());
+        }
+        System.out.println("-".repeat(45));
     }
-
 }

src/main/java/dev/ui/ConsoleMenu.java

@@ -1,44 +1,86 @@
 package dev.ui;
 
+import dev.model.User;
+import dev.service.AuthService;
+import dev.service.MenuService;
+import dev.service.OrderService;
+
 import java.util.Scanner;
 
 public class ConsoleMenu {
 
-    private final Scanner scanner =
+    private final Scanner scanner = new Scanner(System.in);
-            new Scanner(System.in);
+    private final AuthService authService = new AuthService();
+    private final MenuService menuService = new MenuService();
+    private final OrderService orderService = new OrderService(scanner);
 
     public void start() {
-
         while (true) {
-
+            System.out.println("\n===========================");
-            System.out.println();
+            System.out.println("   🍕 JAVA PIZZERIA 🍕");
-            System.out.println("===== JAVA PIZZERIA =====");
+            System.out.println("===========================");
             System.out.println("1. Login");
             System.out.println("2. Register");
             System.out.println("3. Exit");
+            System.out.print("Choose: ");
 
             int choice = scanner.nextInt();
+            scanner.nextLine(); // consume newline
 
             switch (choice) {
-
+                case 1 -> {
-                case 1:
+                    User user = handleLogin();
-                    // TODO
+                    if (user != null) showMainMenu(user);
-                    break;
+                }
-
+                case 2 -> handleRegister();
-                case 2:
+                case 3 -> { System.out.println("Goodbye!"); return; }
-                    // TODO
+                default -> System.out.println("Invalid choice.");
-                    break;
-
-                case 3:
-                    return;
-
-                default:
-                    System.out.println("Invalid choice");
-
             }
-
         }
-
     }
 
+    private void handleRegister() {
+        System.out.println("\n[Register]");
+        System.out.print("Username: "); String username = scanner.nextLine();
+        System.out.print("Password: "); String password = scanner.nextLine();
+        System.out.print("Email (optional, press Enter to skip): "); String email = scanner.nextLine();
+
+        if (authService.register(username, password, email)) {
+            System.out.println("Registration successful! Please log in.");
+        }
+    }
+
+    private User handleLogin() {
+        System.out.println("\n[Login]");
+        System.out.print("Username: "); String username = scanner.nextLine();
+        System.out.print("Password: "); String password = scanner.nextLine();
+
+        User user = authService.login(username, password);
+        if (user != null) System.out.println("Welcome, " + user.getUsername() + "!");
+        return user;
+    }
+
+    private void showMainMenu(User user) {
+        while (true) {
+            System.out.println("\n===========================");
+            System.out.println("       🍽️ MAIN MENU 🍽️");
+            System.out.println("===========================");
+            System.out.println("1. View Menu");
+            System.out.println("2. Place Order");
+            System.out.println("3. Order History");
+            System.out.println("4. Logout");
+            System.out.print("Choose: ");
+
+            int choice = scanner.nextInt();
+            scanner.nextLine();
+
+            switch (choice) {
+                case 1 -> menuService.showMenu();
+                case 2 -> orderService.placeOrder(user.getId());
+                case 3 -> orderService.showOrderHistory(user.getId());
+                case 4 -> { System.out.println("Logged out."); return; }
+                default -> System.out.println("Invalid choice.");
+            }
+        }
+    }
 }