using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;

namespace telefoni2
{
    class Program
    {
        static int[] val = new int[5];
        static SemaphoreSlim S = new SemaphoreSlim(1);
        const int postiTot = 200;
        static int postiLiberi = postiTot;
        static int[] stelle = new int[5] { 1, 2, 3, 4, 5 };


        static void Main(string[] args)
        {
            Parallel.Invoke(() => Cassa(1), () => Cassa(2));

            Parallel.Invoke(() => Hostess(1), () => Hostess(2));

            Console.WriteLine(postiLiberi.ToString());

            FindMax();

            for(int i = 0; i<5; i++)
            {
                Console.WriteLine("{0} stelle: {1}", stelle[i], val[i]);
            }
        }

        static void Cassa(int numCassa)
        {
            int nb;
            Random r = new Random(numCassa);

            for (int i = 0; i < 20; i++)
            {
                Thread.Sleep(r.Next(10, 15 + 1));
                nb = r.Next(1, 10 + 1);
                Console.WriteLine("cassa num: " + numCassa.ToString());
                Occupa(nb);
            }
            Console.WriteLine("cassa " + numCassa.ToString() + " chiusa\n");
        }

        static void Occupa(int quanti)
        {
            S.Wait();
            if (postiLiberi >= quanti)
            {
                postiLiberi -= quanti;
                Console.WriteLine("assegnati " + quanti.ToString() + " posti\n");
            }
            else
            {
                Console.WriteLine("posti non disponibili\n");
            }
            S.Release();
        }

        static void Hostess(int numHostess)
        {
            Random r = new Random(numHostess);
            while (postiLiberi <= postiTot)
            {
                Thread.Sleep(r.Next(10, 15 + 1));

                Console.WriteLine("hostess num: {0}", numHostess);
                S.Wait();
                Intervista();
                S.Release();
            }

        }

        static void Intervista()
        {
            Random valutazione = new Random();
            int aux = valutazione.Next(1, 5 + 1);

            val[aux - 1]++;

            postiLiberi++;
        }

        static void FindMax()
        {
            int aux;

            for (int i = 0; i < 5 - 1; i++)
            {
                for(int j=i+1; j<5; j++)
                {
                    if (val[i] < val[j])
                    {
                        aux = val[j];
                        val[j] = val[i];
                        val[i] = aux;

                        aux = stelle[j];
                        stelle[j] = stelle[i];
                        stelle[i] = aux;
                    }
                }
            }
        }
    }
}