using System;

using System.Collections;

using System.Collections.Generic;

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    public class Programa1

    {

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        public static void Main(string[] args)

    {

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            //initialize variables in declarations

            int passengerNumber = 0;

            object removedObject = null;

            Queue queueFirstClass = new Queue();

            Queue queueCoach = new Queue();

            int passengerArrivalTime;

            Random randomPassengerArrivalTime = new Random();

            Random randomPassengerType = new Random();

            double averageArrivalRateFirstClassR1;  //prompt user for this

            double averageArrivalRateCoachR2;       //prompt user for this

            int experimentDurationInMinutes;    //prompt user for this

            int passengersTotalServiceTime = 0;

            int maximumServiceTimeFirstClass;

            int maximumServiceTimeCoach;

            Random randomServiceTime = new Random();

            int serviceTime;

            Queue serviceStation1FirstClass = new Queue();

            Queue serviceStation2FirstClass = new Queue();

            Queue serviceStation1Coach = new Queue();

            Queue serviceStation2Coach = new Queue();

            Queue serviceStation3Coach = new Queue();

            //Statistics values to be generated by this simulation

            float averageServiceTime;

            float maximumServiceTime;

            int numbersServedInFirstClass;

            int numbersServedInCoach;

            int maximumQueueLengthFirstClassPassenger;

            int maximumQueueLengthCoachPassenger;

            // prompt user for duration of the experiment

            Console.Write("Enter duration of the experiment (in minutes): ");

            experimentDurationInMinutes = Convert.ToInt32(Console.ReadLine());

            // prompt user for AVERAGE arrival rate R1 for First Class passengers

            Console.Write("\n\nEnter AVERAGE arrival rate (R1) for First Class passengers: ");

            averageArrivalRateFirstClassR1 = Convert.ToDouble(Console.ReadLine());

            // prompt user for AVERAGE arrival rate R2 for Coach passengers

            Console.Write("\n\nEnter AVERAGE arrival rate (R2) for Coach passengers: ");

            averageArrivalRateCoachR2 = Convert.ToDouble(Console.ReadLine());

            // prompt user for SERVICE TIME parameters

            Console.Write("\n\nNote: minimum SERVICE TIME for First Class passengers is 1 minute");

            Console.Write("\nEnter maximum (S1) SERVICE TIME for First Class passenger (in minutes): ");

            maximumServiceTimeFirstClass = Convert.ToInt32(Console.ReadLine());

            Console.Write("\n\nNote: minimum SERVICE TIME for Coach passengers is 1 minute");

            Console.Write("\nEnter maximum (S2) SERVICE TIME for Coach passenger (in minutes): ");

            maximumServiceTimeCoach = Convert.ToInt32(Console.ReadLine());

            while (passengersTotalServiceTime < experimentDurationInMinutes)

            {

                passengerNumber++; //counting passengers

                // Generate random arrival time for passengers (between 1 and the experiment duration time). And put it in a queue.

                passengerArrivalTime = 1 + randomPassengerArrivalTime.Next(experimentDurationInMinutes);

                // Generate random passenger type (1 for First Class, else is a Coach passenger)

                if (randomPassengerType.Next(1, 3) == 1) //is a First Class passenger

                {

                    queueFirstClass.Enqueue("Passenger "+passengerNumber); //loading in queue 1st INFO

                    if (maximumServiceTimeFirstClass == 1) serviceTime = 1;

                    else

                        serviceTime = 1 + randomServiceTime.Next(maximumServiceTimeFirstClass); // generating random Service Time for First Class passenger

                    passengersTotalServiceTime = passengersTotalServiceTime + serviceTime; // argument for while loop

                    queueFirstClass.Enqueue(serviceTime); //loading in queue 2nd INFO

                    queueFirstClass.Enqueue(passengerArrivalTime); //loading in queue 3rd INFO

                }

                else // is a Coach passenger

                {

                    queueCoach.Enqueue("Passenger "+passengerNumber); //loading in queue 1st INFO

                    if (maximumServiceTimeCoach == 1) serviceTime = 1;

                    else

                        serviceTime = 1 + randomServiceTime.Next(maximumServiceTimeCoach); // generating random Service Time for Coach passenger

                    passengersTotalServiceTime = passengersTotalServiceTime + serviceTime; // argument for while loop

                    queueCoach.Enqueue(serviceTime); //loading in queue 2nd INFO

                    queueCoach.Enqueue(passengerArrivalTime); //loading in queue 3rd INFO

                }

            } //end of while loop

            //MAXIMUM QUEUE LENGTH FOR FIRST CLASS

            maximumQueueLengthFirstClassPassenger = (queueFirstClass.Count) / 3;

            //MAXIMUM QUEUE LENGTH FOR COACH

            maximumQueueLengthCoachPassenger = (queueCoach.Count) / 3;

            //Whenever a service station is available and the corresponding queue is not empty,

             //we pick the passenger at the front of the queue.

             //ALSO, whenever a First Class service station is available and the First Class queue is empty,

             //the service station may service a passenger from Coach.

             for (int passengerCounter = passengerNumber; passengerCounter >= 1; passengerCounter--)

             {

                 if ((serviceStation1FirstClass.Count == 0) && (queueFirstClass.Count != 0))

                 {

                     for (int counter = 3; counter >= 1; counter --)

                         serviceStation1FirstClass.Enqueue(removedObject = queueFirstClass.Dequeue());

                 }

                 else if ((serviceStation2FirstClass.Count == 0) && (queueFirstClass.Count != 0))

                 {

                     for (int counter = 3; counter >= 1; counter --)

                         serviceStation2FirstClass.Enqueue(removedObject = queueFirstClass.Dequeue());

                 }

                 else if ((serviceStation1Coach.Count == 0) && (queueCoach.Count != 0))

                 {

                     for (int counter = 3; counter >= 1; counter --)

                         serviceStation1Coach.Enqueue(removedObject = queueCoach.Dequeue());

                 }

                  else if ((serviceStation2Coach.Count == 0) && (queueCoach.Count != 0))

                 {

                      for (int counter = 3; counter >= 1; counter --)

                         serviceStation2Coach.Enqueue(removedObject = queueCoach.Dequeue());

                 }

                 else if ((serviceStation3Coach.Count == 0) && (queueCoach.Count != 0))

                 {

                      for (int counter = 3; counter >= 1; counter --)

                         serviceStation3Coach.Enqueue(removedObject = queueCoach.Dequeue());

                 }

                 else if (((serviceStation1FirstClass.Count == 0) && (queueFirstClass.Count == 0)) && (queueCoach.Count != 0))

                 {

                      for (int counter = 3; counter >= 1; counter --)

                         serviceStation1FirstClass.Enqueue(removedObject = queueCoach.Dequeue());

                 }

                 else if (((serviceStation2FirstClass.Count == 0) && (queueFirstClass.Count == 0)) && (queueCoach.Count != 0))

                 {

                      for (int counter = 3; counter >= 1; counter --)

                         serviceStation2FirstClass.Enqueue(removedObject = queueCoach.Dequeue());

                 }

             } //end of for loop

            //STATISTISC GENERATED BY SIMULATION

            Console.WriteLine("\n\n ESTADÍSTICAS:");

            averageServiceTime = (float)passengersTotalServiceTime / (float)passengerNumber;

            Console.WriteLine("\n\n PROMEDIO DE TIEMPO DE SERVICIO= {0}", averageServiceTime);

            if (maximumServiceTimeFirstClass >= maximumServiceTimeCoach)

                maximumServiceTime = maximumServiceTimeFirstClass;

            else

                maximumServiceTime = maximumServiceTimeCoach;

            Console.WriteLine("\n\n TIEMPO MÁXIMO DE SERVICIO= {0}", maximumServiceTime);

            numbersServedInFirstClass = ((serviceStation1FirstClass.Count) / 3) + ((serviceStation2FirstClass.Count) / 3);

            Console.WriteLine("\n\n ATENDIDOS EN PRIMERA CLASE= {0}", numbersServedInFirstClass);

            numbersServedInCoach = ((serviceStation1Coach.Count) / 3) + ((serviceStation2Coach.Count) / 3) + ((serviceStation3Coach.Count) / 3);

            Console.WriteLine("\n\n ATENDIDOS EN COACH= {0}", numbersServedInCoach);

            Console.WriteLine("\n\n COLA DE PRIMERA CLASE= {0}", maximumQueueLengthFirstClassPassenger);

            Console.WriteLine("\n\n COLA DE COACH= {0}", maximumQueueLengthCoachPassenger);

            Console.WriteLine("\n\n");

        } //end Main

    } // end class