import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

class Product {

private String name;

private double price;

private int quantity;

public Product(String name, double price, int quantity) {

this.name = name;

this.price = price;

this.quantity = quantity;

}

public String getName() {

return name;

}

public double getPrice() {

return price;

}

public int getQuantity() {

return quantity;

}

public double getTotalPrice() {

return price * quantity;

}

}

class ShoppingCart {

private List<Product> products;

private static final double TAX_RATE = 0.08;

private static final double DISCOUNT_RATE = 0.1;

public ShoppingCart() {

this.products = new ArrayList<>();

}

public void addProduct(Product product) {

products.add(product);

System.out.println(product.getName() + " added to the cart.");

}

public void removeProduct(String productName) {

products.removeIf(product -> product.getName().equalsIgnoreCase(productName));

System.out.println(productName + " removed from the cart.");

}

public double calculateTotalCost() {

double total = 0;

for (Product product : products) {

total += product.getTotalPrice();

}

if (total > 100) {

total -= total * DISCOUNT_RATE;

}

total += total * TAX_RATE;

return total;

}

public void displayCartContents() {

if (products.isEmpty()) {

System.out.println("Your cart is empty.");

return;

}

System.out.println("\nCart Contents:");

for (Product product : products) {

System.out.println("Product: " + product.getName() + ", Price: $" + product.getPrice() + ", Quantity: " + product.getQuantity());

}

System.out.println("Total Cost (with tax and discounts): $" + calculateTotalCost());

}

}

class Customer {

private String name;

private String email;

private ShoppingCart cart;

public Customer(String name, String email) {

this.name = name;

this.email = email;

this.cart = new ShoppingCart();

}

public ShoppingCart getCart() {

return cart;

}

}

public class OnlineShoppingCartSystem {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

Customer customer = null;

try {

System.out.print("Enter your name: ");

String name = scanner.nextLine();

System.out.print("Enter your email: ");

String email = scanner.nextLine();

customer = new Customer(name, email);

while (true) {

System.out.println("\n1. Add Product\n2. Remove Product\n3. View Cart\n4. Checkout\n5. Exit");

System.out.print("Choose an option: ");

int option = Integer.parseInt(scanner.nextLine());

if (option == 1) {

System.out.print("Enter product name: ");

String productName = scanner.nextLine();

System.out.print("Enter product price: ");

double productPrice = Double.parseDouble(scanner.nextLine());

System.out.print("Enter product quantity: ");

int quantity = Integer.parseInt(scanner.nextLine());

Product product = new Product(productName, productPrice, quantity);

customer.getCart().addProduct(product);

} else if (option == 2) {

System.out.print("Enter product name to remove: ");

String productName = scanner.nextLine();

customer.getCart().removeProduct(productName);

} else if (option == 3) {

customer.getCart().displayCartContents();

} else if (option == 4) {

System.out.println("\nProceeding to checkout...");

customer.getCart().displayCartContents();

System.out.println("Thank you for shopping with us!");

break;

} else if (option == 5) {

System.out.println("Exiting the system. Thank you!");

break;

} else {

System.out.println("Invalid option. Please try again.");

}

}

} catch (NumberFormatException e) {

System.out.println("Invalid input! Please enter the correct data type.");

} catch (Exception e) {

System.out.println("An error occurred: " + e.getMessage());

} finally {

if (scanner != null) {

scanner.close();

}

}

}

}