InventoryManagementApp2.java

import java.util.Scanner;

public class InventoryManagementApp2 {

    public static void main(String[] args) {

        // Variables for "menu" driven logic
        boolean exit = false;
        Scanner scnr = new Scanner(System.in);
        int menuOption;
        int userQuantity;
        int productId;

        // Create a list-based StoreInventoryList instance
        StoreInventoryList inventory = new StoreInventoryList();

        // These products start with a "stock" for testing purposes, but in a real system they would not.
        Electronics iphone = new Electronics(1, "Iphone 16", "Electronics", 1000.00, 30, 90, "Apple");
        Electronics playstation = new Electronics(2, "Playstation", "Electronics", 600.00, 18, 90, "Sony");
        Clothing sweater = new Clothing(3, "Sweater", "Clothing", 15.00, 50, 10, "Alpacha Wool");
        Food apple = new Food(4, "Apple", "Food", 1.50, 25, "2025-01-25");

        // Main menu
        String mainMenu = """
            Menu:
            1. Display all products to add to inventory

            2. Add product to inventory

            3. Remove product from inventory

            4. Add stock to a product

            5. Remove stock of a product

            6. Generate Report on all products in the inventory

            7. Exit
            """;

        while (!exit) {

            System.out.println(mainMenu); // Main menu shows first
            System.out.println("Please select an option (1-7):");

            menuOption = scnr.nextInt();

            switch (menuOption) {
                case 1:
                    // Display all products available to add to inventory
                    System.out.println("Available Products");
                    System.out.println("Name: " + iphone.getProductName() + " ID: " + iphone.getProductID());
                    System.out.println("Name: " + playstation.getProductName() + " ID: " + playstation.getProductID());
                    System.out.println("Name: " + sweater.getProductName() + " ID: " + sweater.getProductID());
                    System.out.println("Name: " + apple.getProductName() + " ID: " + apple.getProductID());
                    break;

                case 2:
                    // Add the product to inventory
                    System.out.println("Please enter the productID of the product.");

                    productId = scnr.nextInt();

                    switch (productId) {
                        case 1:
                            inventory.addProduct(iphone);
                            break;
                        case 2:
                            inventory.addProduct(playstation);
                            break;
                        case 3:
                            inventory.addProduct(sweater);
                            break;
                        case 4:
                            inventory.addProduct(apple);
                            break;
                        default:
                            System.out.println("Sorry, seems like we don't have that item to add to the inventory. Try again.");
                    }
                    break;

                case 3:
                    // Remove the product from the inventory
                    if (inventory.getProductCount() > 0) {
                        System.out.println("Please enter the productID of the product you would like to remove.");
                        productId = scnr.nextInt();
                        inventory.removeProduct(productId);
                    } else {
                        System.out.println("Sorry, you can't remove products if the inventory is empty.");
                    }
                    break;

                case 4:
                    // Add stock to a product
                    if (inventory.getProductCount() > 0) {
                        System.out.println("Please enter the productID of the product.");
                        productId = scnr.nextInt();
                        System.out.println("Please enter a stock count less than or equal to 100");
                        userQuantity = scnr.nextInt();
                        inventory.addStockToProduct(productId, userQuantity);
                    } else {
                        System.out.println("Sorry, you can't add stock if there are no products.");
                    }
                    break;

                case 5:
                    // Remove stock from a product
                    if (inventory.getProductCount() > 0) {
                        System.out.println("Please enter the productID of the item.");
                        productId = scnr.nextInt();
                        System.out.println("Please enter a quantity less than or equal to 100");
                        userQuantity = scnr.nextInt();
                        inventory.removeStockFromProduct(productId, userQuantity);
                    } else {
                        System.out.println("Sorry, you can't remove stock if there are no products.");
                    }
                    break;

                case 6:
                    // Generate a report for all products in the inventory
                    inventory.generateReport();
                    break;

                case 7:
                    // Exit the inventory tool
                    scnr.close();
                    System.out.println("Thanks for using the inventory system. Have a great day!");
                    exit = true;
                    break;

                default:
                    System.out.println("Remember to select integers 1-7 for a valid menu option.\n");
                    break;
            }
        }
    }
}