Program.cs

using Mission3;

internal class Program
{
    public static void Main(string[] args)
    {
        bool programRunning = true;
        List<FoodItem> foodItems = new List<FoodItem>();

        while (programRunning)
        {
            Console.WriteLine("\nHello, welcome to your Food Bank Inventory!\n" +
                "Below are the menu options:");
            Console.WriteLine("1. Add a food item\n" +
              "2. Delete a food item\n" +
              "3. Print list of current food items\n" +
              "4. Exit");

            Console.Write("Please select an option by entering a number (e.g. '3'): ");
            
            string choice = Console.ReadLine();
            switch (choice)
            {
                // ADD FOOD ITEM CASE
                case "1":
                    Console.Write("\n\n\n\nAdd Food Item selected.\n" +
                        "Please enter the name of the food item you would like to add: ");
                    string name = Console.ReadLine();
                    Console.WriteLine($"Adding {name}...");
                    
                    Console.Write($"What food category does {name} belong to?: ");
                    string category = Console.ReadLine();
                    
                    int quantity;
                    while (true)
                    {
                        Console.Write($"How many {name}(s) would you like to add? (Whole numbers only e.g. '7'): ");
                        if (int.TryParse(Console.ReadLine(), out quantity) && quantity > 0)
                        {
                            break;
                        }
                        Console.WriteLine("Invalid input. Please enter a positive whole number.");
                    }
                    
                    DateTime expirationDate;
                    while (true)
                    {
                        Console.Write($"Finally, when do your {quantity} {name}(s) expire? (yyyy-mm-dd): ");
                        if (DateTime.TryParse(Console.ReadLine(), out expirationDate))
                        {
                            break;
                        }
                        Console.WriteLine("Invalid date format. Please enter the date in yyyy-mm-dd format.");
                    }
                    
                    FoodItem newItem = new FoodItem(name, category, quantity, expirationDate);
                    foodItems.Add(newItem);
                    
                    Console.WriteLine($"\n\nSuccessfully added {quantity} {name}(s) to the {category} inventory. Expiration Date: {expirationDate:yyyy-mm-dd}" +
                        "\n\nTaking you back to the main menu...");
                    break;

                // DELETE FOOD ITEM CASE
                case "2":
                    Console.WriteLine("\n\n\n\nDelete Food Item selected.\n");

                    if (foodItems.Count == 0)
                    {
                        Console.WriteLine("There are no food items in your inventory.");
                        break;
                    }
                    
                    Console.WriteLine("\nCurrent Food Items:");
                    for (int i = 0; i < foodItems.Count; i++)
                    {
                        FoodItem item = foodItems[i];
                        Console.WriteLine($"{i + 1}. {item.name} - qty: {item.quantity} | category: {item.category} | (Expires: {item.expirationDate:yyyy-MM-dd})");
                    }
                    
                    // Prompt the user to select an item by index
                    Console.Write("\nEnter the number of the food item you want to delete: ");
                    if (int.TryParse(Console.ReadLine(), out int index) && index > 0 && index <= foodItems.Count)
                    {
                        // Remove the selected item
                        FoodItem removedItem = foodItems[index - 1];
                        foodItems.RemoveAt(index - 1);
                        Console.WriteLine($"Successfully removed {removedItem.name} from the inventory.");
                    }
                    else
                    {
                        Console.WriteLine("Invalid selection. Please try again.");
                    }
                    break;

                // PRINT LIST CASE
                case "3":
                    Console.WriteLine("\n\n\n\nCurrent Food Items:\n");

                    if (foodItems.Count == 0)
                    {
                        Console.WriteLine("There are no food items in your inventory.");
                    }
                    else
                    {
                        for (int i = 0; i < foodItems.Count; i++)
                        {
                            FoodItem item = foodItems[i];
                            Console.WriteLine($"{i + 1}.  {item.name} - qty: {item.quantity} | category: {item.category} | Expires: {item.expirationDate:yyyy-mm-dd}");
                        }
                    }
                    
                    Console.Write("\nWould you like to go back to the main menu? (y for yes /n to exit): ");
                    string answer = Console.ReadLine();
                    if (answer == "y")
                    {
                        break;
                    }
                    else if (answer == "n")
                    {
                        programRunning = false;
                    }
                    break;

                // EXIT CASE
                case "4":
                    Console.WriteLine("\n\n\n\nExiting program...\n");
                    programRunning = false;
                    break;

                default:
                    Console.WriteLine("\n\n\n\nInvalid choice. Please try again.\n");
                    break;
            }
        }

    }
}