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

namespace Simulator
{
    class BL_Department
    {
        DataProcessing DataProcess;
        OfficeClerk clerk;
        Task[] _arrFreeClerk;
        bool search;

        int _numberClerks;
        public int NumberClerks
        {
            get
            {
                return _numberClerks;
            }
            set
            {
                    if (value <= 0 )
                    {
                        _numberClerks = Inquiry("clerks");
                    }
                    else
                        _numberClerks = value;
            }
        }

        int _numberPeopleInLine;
        public int NumberPeopleInLine
        {
            get
            {
                return _numberPeopleInLine;
            }
            set
            {

                if (value <= 0 && search == true)
                {
                    _numberPeopleInLine = Inquiry("clients");
                }
                else
                    _numberPeopleInLine = value;
            }
        }

        int[] _arrTimeReceptionPerClerk { get; set; }


        public BL_Department(int numberClients, int numberClerks)
        {
            clerk = new OfficeClerk();
            DataProcess = new DataProcessing();
            search = true;
            NumberPeopleInLine = numberClients;
            NumberClerks = numberClerks;
            _arrTimeReceptionPerClerk = new int[NumberClerks];
            _arrFreeClerk = new Task[NumberClerks];
        }

        int Inquiry (string name)
        {
            int data;
            do
            {
                Console.WriteLine($"Entered number of {name} is not correct.Reentered please:");
                data = int.Parse(Console.ReadLine());
            }
            while (data <= 0);
            return data;
        }

        //It imitates the beginning of the work of the department, when initially all the officials are free, and also checks if there
        //are fewer clients than officials and immediately displays a message that there is enough staff.
        public void Open_Department ()
        {
            if (NumberPeopleInLine > NumberClerks)
             {
                    for (int indexClerk = 0; indexClerk < NumberClerks; indexClerk++)
                    {
                        NextClient(indexClerk);
                    }
                    SearchFreeClerk();
            }
            else
                Console.WriteLine($"The number of officials in the amount {NumberClerks} is sufficient to serve a given number of people.");
        }

        void SearchFreeClerk()
        {
            while(NumberPeopleInLine != 0)
            {
                for (int indexClerk = 0; indexClerk < NumberClerks; indexClerk++)
                {
                    if (_arrFreeClerk[indexClerk].IsCompleted)
                    {
                        NextClient(indexClerk);
                    }
                }
            }
            Close_Department();
        }

        //Accesses the "OfficeClerk" class to start a thread ("enter client") and set the service time.
        void NextClient(int indexClerk)
        {
            _arrFreeClerk[indexClerk] = clerk.ServiceClerkAsync();
            _arrTimeReceptionPerClerk[indexClerk] += clerk.TimeReception;
            search = false;
            NumberPeopleInLine--;
        }

        //The Method sends data to class "DataProcessing" for processing
        void Close_Department ()
        {
           DataProcess.Processing(_arrTimeReceptionPerClerk, NumberClerks);
        }
    }
}