src/Main.java - master - itokar98/HomeWorkPatternsSolidTask1

src/Main.java
190 строк10 KB
Ilya Tokar
first_commit
19 ноя 2025, 01:14
19 ноя 2025, 01:148a62050
import model.*;
import repository.*;
import service.*;

import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // Initialize repositories
        ProductRepository productRepository = new ProductRepository();
        OrderRepository orderRepository = new OrderRepository();
        
        // Initialize services with dependency injection
        ProductService productService = new ProductService(productRepository);
        CartService cartService = new CartService(productService);
        OrderService orderService = new OrderService(orderRepository, cartService);
        
        Scanner scanner = new Scanner(System.in);
        Long currentUserId = 1L; // Simulating logged-in user
        
        System.out.println("Welcome to Online Store!");
        
        while (true) {
            System.out.println("\n--- Main Menu ---");
            System.out.println("1. View all products");
            System.out.println("2. Search products by name");
            System.out.println("3. Filter products by category");
            System.out.println("4. Filter products by price range");
            System.out.println("5. View my cart");
            System.out.println("6. Add product to cart");
            System.out.println("7. Remove product from cart");
            System.out.println("8. Checkout (create order)");
            System.out.println("9. View my orders");
            System.out.println("10. Track order status");
            System.out.println("11. Cancel order");
            System.out.println("12. View recommended products");
            System.out.println("0. Exit");
            System.out.print("Choose an option: ");
            
            int choice = scanner.nextInt();
            scanner.nextLine(); // Consume newline
            
            try {
                switch (choice) {
                    case 1 -> {
                        System.out.println("\n--- All Products ---");
                        List<Product> allProducts = productService.getAllProducts();
                        allProducts.forEach(System.out::println);
                    }
                    case 2 -> {
                        System.out.print("Enter search keyword: ");
                        String keyword = scanner.nextLine();
                        List<Product> searchResults = productService.searchProducts(keyword);
                        if (searchResults.isEmpty()) {
                            System.out.println("No products found matching '" + keyword + "'");
                        } else {
                            System.out.println("\n--- Search Results for '" + keyword + "' ---");
                            searchResults.forEach(System.out::println);
                        }
                    }
                    case 3 -> {
                        System.out.print("Enter category: ");
                        String category = scanner.nextLine();
                        List<Product> categoryProducts = productService.getProductsByCategory(category);
                        if (categoryProducts.isEmpty()) {
                            System.out.println("No products found in category '" + category + "'");
                        } else {
                            System.out.println("\n--- Products in '" + category + "' ---");
                            categoryProducts.forEach(System.out::println);
                        }
                    }
                    case 4 -> {
                        System.out.print("Enter minimum price: ");
                        double minPrice = scanner.nextDouble();
                        System.out.print("Enter maximum price: ");
                        double maxPrice = scanner.nextDouble();
                        List<Product> priceRangeProducts = productService.getProductsByPriceRange(minPrice, maxPrice);
                        if (priceRangeProducts.isEmpty()) {
                            System.out.println("No products found in price range " + minPrice + "-" + maxPrice);
                        } else {
                            System.out.println("\n--- Products in price range " + minPrice + "-" + maxPrice + " ---");
                            priceRangeProducts.forEach(System.out::println);
                        }
                    }
                    case 5 -> {
                        System.out.println("\n--- Your Cart ---");
                        List<Product> cartItems = cartService.getCartItems(currentUserId);
                        if (cartItems.isEmpty()) {
                            System.out.println("Your cart is empty");
                        } else {
                            cartItems.forEach(System.out::println);
                            System.out.println("Total: $" + String.format("%.2f", cartService.getCartTotal(currentUserId)));
                        }
                    }
                    case 6 -> {
                        System.out.print("Enter product ID to add to cart: ");
                        Long productId = scanner.nextLong();
                        try {
                            cartService.addProductToCart(currentUserId, productId);
                            System.out.println("Product added to cart!");
                        } catch (IllegalArgumentException e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                    }
                    case 7 -> {
                        System.out.print("Enter product ID to remove from cart: ");
                        Long productId = scanner.nextLong();
                        try {
                            cartService.removeProductFromCart(currentUserId, productId);
                            System.out.println("Product removed from cart!");
                        } catch (IllegalArgumentException e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                    }
                    case 8 -> {
                        try {
                            Order order = orderService.createOrderFromCart(currentUserId);
                            System.out.println("Order created successfully!");
                            System.out.println("Order ID: " + order.getId());
                            System.out.println("Total amount: $" + String.format("%.2f", order.getTotalPrice()));
                            System.out.println("Status: " + order.getStatus());
                        } catch (IllegalStateException e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                    }
                    case 9 -> {
                        System.out.println("\n--- Your Orders ---");
                        List<Order> userOrders = orderService.getOrdersByUserId(currentUserId);
                        if (userOrders.isEmpty()) {
                            System.out.println("You have no orders yet");
                        } else {
                            userOrders.forEach(order -> 
                                System.out.println("Order ID: " + order.getId() + 
                                    ", Date: " + order.getOrderDate() + 
                                    ", Status: " + order.getStatus() + 
                                    ", Total: $" + String.format("%.2f", order.getTotalPrice()))
                            );
                        }
                    }
                    case 10 -> {
                        System.out.print("Enter order ID to track: ");
                        Long orderId = scanner.nextLong();
                        try {
                            Order order = orderService.getOrderById(orderId);
                            System.out.println("\n--- Order Tracking ---");
                            System.out.println("Order ID: " + order.getId());
                            System.out.println("Status: " + order.getStatus());
                            System.out.println("Order Date: " + order.getOrderDate());
                            System.out.println("Products:");
                            order.getProducts().forEach(p -> 
                                System.out.println("  - " + p.getName() + ": $" + String.format("%.2f", p.getPrice()))
                            );
                            System.out.println("Total: $" + String.format("%.2f", order.getTotalPrice()));
                        } catch (IllegalArgumentException e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                    }
                    case 11 -> {
                        System.out.print("Enter order ID to cancel: ");
                        Long orderId = scanner.nextLong();
                        try {
                            orderService.cancelOrder(orderId);
                            System.out.println("Order cancelled successfully!");
                        } catch (IllegalStateException e) {
                            System.out.println("Error: " + e.getMessage());
                        }
                    }
                    case 12 -> {
                        System.out.println("\n--- Recommended Products ---");
                        List<Product> recommendations = orderService.getRecommendedProducts(currentUserId);
                        if (recommendations.isEmpty()) {
                            System.out.println("No recommendations available");
                        } else {
                            recommendations.forEach(System.out::println);
                        }
                    }
                    case 0 -> {
                        System.out.println("Thank you for shopping with us!");
                        return;
                    }
                    default -> System.out.println("Invalid option. Please try again.");
                }
            } catch (Exception e) {
                System.out.println("An error occurred: " + e.getMessage());
                scanner.nextLine(); // Clear invalid input
            }
        }
    }
}