using System;
using System.Collections;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {

        static void Main(string[] args)
        {

            ArrayList Drinks = new ArrayList(1);
            string keepgoing = "yes";


            do
            {
                {
                    Console.WriteLine("Choose a Menu Option:");
                    Console.WriteLine("1. Purchase a Drink");
                    Console.WriteLine("2. Check the Supply:");
                    Console.WriteLine("3. Stock the Machine:");

                    int choice;
                    choice = Convert.ToInt32(Console.ReadLine());


                    //purchase a drink
                    if (choice == 1)
                    {
                        Console.WriteLine("Enter the number of your choice:");
                        Console.WriteLine("1. Coke");
                        Console.WriteLine("2. DietCoke");
                        Console.WriteLine("3. Sprite");
                        Console.WriteLine("4. Dasani");

                        int selection = Convert.ToInt32(Console.ReadLine());
                        Console.WriteLine("selection" + selection);

                        if (selection == 1)
                        {
                            Console.WriteLine(Convert.ToString(Drinks.IndexOf("Coke")));

                            int drinkNum;
                            drinkNum = Convert.ToInt32(Drinks.IndexOf("Coke"));
                            Drinks.RemoveAt(drinkNum);
                            Console.WriteLine("You bought a Coke");

                        }
                        if (selection == 2)
                        {
                            Console.WriteLine(Convert.ToString(Drinks.IndexOf("DietCoke")));

                            int drinkNum;
                            drinkNum = Convert.ToInt32(Drinks.IndexOf("DietCoke"));
                            Drinks.RemoveAt(drinkNum);
                            Console.WriteLine("You bought a Diet Coke");

                        }
                        if (selection == 3)
                        {
                            Console.WriteLine(Convert.ToString(Drinks.IndexOf("Sprite")));

                            int drinkNum;
                            drinkNum = Convert.ToInt32(Drinks.IndexOf("Sprite"));
                            Drinks.RemoveAt(drinkNum);
                            Console.WriteLine("You bought a Sprite");

                        }
                        if (selection == 4)
                        {
                            Console.WriteLine(Convert.ToString(Drinks.IndexOf("Dasani")));

                            int drinkNum;
                            drinkNum = Convert.ToInt32(Drinks.IndexOf("Dasani"));
                            Drinks.RemoveAt(drinkNum);
                            Console.WriteLine("You bought a Dasani");

                        }


                    }

                    //code to show Inventory        
                    else if (choice == 2)
                    {
                        Console.WriteLine("The items in the machine are: ");

                        for (int x = 0; x < Drinks.Count; x++)
                        {
                            Object drink = Drinks[x];

                            Console.WriteLine(drink);
                        }

                        Console.WriteLine(Drinks.Count);
                        



                    }


                    //code to stock

                    else if (choice == 3)
                    {

                        string answer = "yes";
                        do
                        {
                            Console.WriteLine("What product are you placing in the machine?");
                            string product = Console.ReadLine();
                            Drinks.Add(product);
                            Console.WriteLine("Do you have more stock?");
                            answer = Console.ReadLine();

                        }
                        while (answer != "no");

                    }

                    if (choice == 0)
                    {
                        Console.WriteLine("Thanks for using this vending machine!");
                        Console.ReadLine();
                    }

                }

                Console.WriteLine("Are you finished with the vending machine?");
                keepgoing = Console.ReadLine();

            } while (keepgoing != "yes");



        }
    }
}