using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Collections;

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namespace ConsoleApplication4

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{

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    //---------------------------------

    public class Customer

    {

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        public string FirstName;

        public string LastName;

        public string CMeal;

        public Customer()

        {

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        }

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        public Customer(string FirstName, string LastName, string CMeal)

        {

            this.FirstName = FirstName;

            this.LastName = LastName;

            this.CMeal = CMeal;

        }

    }

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    enum Meals

    { none, appetizer, main, desert, done }

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    //------------------------------------------

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    class QueueDemo

    {  // Create a customer

        public Customer RestCustomer;

        // create the Queue

        Queue CustQueue = new Queue();

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        public void QueueCustomers()

        {

            // the customers come in one at a time and get in line 

            // waiting for the table to sit down

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            // The first customer

            RestCustomer.FirstName = "AAAA";

            RestCustomer.LastName = "BBBB";

            RestCustomer.CMeal = Meals.none.ToString();

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​

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            CustQueue.Enqueue(RestCustomer);

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            // second customer

            RestCustomer.FirstName = "CCCC";

            RestCustomer.LastName = "DDDD";

            RestCustomer.CMeal = Meals.appetizer.ToString();

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            CustQueue.Enqueue(RestCustomer);

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            // third customer

            RestCustomer.FirstName = "EEEE";

            RestCustomer.LastName = "FFFF";

            RestCustomer.CMeal = Meals.main.ToString();

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            CustQueue.Enqueue(RestCustomer);

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            // Fouth customer

            RestCustomer.FirstName = "GGGG";

            RestCustomer.LastName = "HHHH";

            RestCustomer.CMeal = Meals.desert.ToString();

​

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            CustQueue.Enqueue(RestCustomer);

​

​

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            // Fifth customer

            RestCustomer.FirstName = "IIII";

            RestCustomer.LastName = "JJJJ";

            RestCustomer.CMeal = Meals.done.ToString();

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            CustQueue.Enqueue(RestCustomer);

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            // see how many people are in line 

            Console.WriteLine(" ");

            Console.WriteLine("Count of Items in the Queue at the start :" + CustQueue.Count);

            Console.WriteLine(" ");

            // now we want to remove items from the queue so we can work on them 

            // the items are an object so we need to recognize that 

            // put the queue data in the RestCustomer structure 

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            RestCustomer = (Customer)CustQueue.Dequeue();

            // write out 

            Console.WriteLine("FName: " + RestCustomer.FirstName);

            Console.WriteLine("LName: " + RestCustomer.LastName);

            Console.WriteLine("Meals: " + RestCustomer.CMeal);

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            Console.WriteLine("Count of Items in the Queue after first Dequeue:" + CustQueue.Count);

            Console.WriteLine("----------------------------------------------------------------");

            Console.WriteLine(" ");

            // now we can go throught the reamainder of the bank's sustomers using a loop 

            do

            {

                RestCustomer = (Customer)CustQueue.Dequeue();

                // write out 

                Console.WriteLine("FName: " + RestCustomer.FirstName);

                Console.WriteLine("LName: " + RestCustomer.LastName);

                Console.WriteLine("Meals: " + RestCustomer.CMeal);

                Console.WriteLine("Count of Items in the Queue after Dequeue: " + CustQueue.Count);

                Console.WriteLine("----------------------------------------------------------------");

                Console.WriteLine(" ");

            } while (CustQueue.Count != 0);

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        }

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        //------------------------------------

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       public  class Program

        {

            //--------------------- Main -----------------------

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            public static void Main(string[] args)

            {

                Table<int> myInts = new Table<int>();

                myInts.Changed += CollectionChanged;

                myInts.Push(1);

                myInts.Push(2);

                var x = myInts.Pop();

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​

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                //-----Queue--------------------------

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                QueueDemo ResurantWithCustomersList;

                ResurantWithCustomersList = new QueueDemo();

                ResurantWithCustomersList.QueueCustomers();

                // pause

                Console.Read();

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            }

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            //--Events-----------------------------------------------------------------------

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            private static void CollectionChanged(object sender, StackEventArgs item)

            {

                Console.WriteLine("{0} {1}", item.eventChange, item.eventItem);

            }

        }

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        public delegate void EventDelegate(object sender, StackEventArgs eventData);

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        public class Table<T>

        {

            public event EventDelegate Changed;

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            private List<T> _list = new List<T>();

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            public void Push(T item)

            {

                _list.Insert(_list.Count, item);

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                if (Changed != null)

                {

                    Changed(this, new StackEventArgs(item, "Push"));

                }

            }

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            public T Pop()

            {

                T item = _list[_list.Count - 1];

                _list.RemoveAt(_list.Count - 1);

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                if (Changed != null)

                {

                    Changed(this, new StackEventArgs(item, "Pop"));

                }

                return item;

            }

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        }

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        public class StackEventArgs : EventArgs

        {

            public object eventItem { get; set; }

            public string eventChange { get; set; }

            public StackEventArgs(object item, string change)

            {

                eventItem = item;

                eventChange = change;

            }

        }

    }

}

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