using System;

using System.Collections.Generic;       

using System.Linq;

​

public class WeekWork

{

    public int Id { get; set; }

    public List<DateTime> Days { get; set; }

    public char Shift { get; set; }

    public int WorkingDay { get; set; }

}

​

public class Employee

{

    public int Id { get; set; }

    public string Name { get; set; }

    public string LastName { get; set; }

    public List<WeekWork> weekWorks { get; set; }

​

}

​

public class Program

{

    public static void Main()

    {

        List<Employee> employees = new List<Employee>{ new Employee(){Id = 1, Name = "Mateusz", LastName = "Test"},

                                                     new Employee(){Id = 2, Name = "Marcin", LastName = "Jakis"},

                                                     new Employee(){Id = 2, Name = "Normalnie", LastName = "Nienormalny"} };

        //List<int> employees = new List<int> { 1, 2, 3, 4, 5, 6, 7 };

        WeekWork weekWork = new WeekWork();

        int workingDays = 22;

        DateTime CurrentDate = DateTime.Now.AddMonths(1);

        DateTime StartMonth = CurrentDate.AddDays(-CurrentDate.Day + 1);

        DateTime CheckWeek = StartMonth;

        int workDay = 2; // need to set properly week 1 (has to be fetched from database)

        int temp = 0; // need to set properly week 1

        while (StartMonth.DayOfWeek.ToString() != "Monday")

        {

            temp++;

            StartMonth = StartMonth.AddDays(-1);

        }

        int workInWeek = 5; // need to set up properly workdays in the every week

        //Console.WriteLine(temp - workDay); // numbers of the days that were free in the previous month

        IDictionary<int, int> Weeks = new Dictionary<int, int>(); // 

        Weeks.Add(1, CheckWeek.AddDays(7 - temp - 1).Day); // temp - 1 because temp stands for Monday and in this case we need Sunday.      

        for(int i = 2; i <= 4; i++)

        {

            int x = Weeks.ElementAt(i - 2).Value + 6;

            Weeks.Add(i, CheckWeek.AddDays(x).Day);

        }

        DateTime LastWeek = CheckWeek.AddDays(Weeks.ElementAt(3).Value);

        while (LastWeek.Day != DateTime.DaysInMonth(CurrentDate.Year, CurrentDate.Month))

        {

            LastWeek = LastWeek.AddDays(+1);

        }

        Weeks.Add(5, LastWeek.Day);

        //Console.WriteLine(Weeks.ElementAt(0).Value);

        Random rand = new Random();     

        List<int> listNumbers = new List<int>();

        int number;

        for (int i = 0; i < employees.Count(); i++)

        {

          do {

             number = rand.Next(1, employees.Count + 1);

          } while (listNumbers.Contains(number));

          listNumbers.Add(number);

        }

        for (int i = 1; i <= 5; i++)

        {

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

            int dayShift = 0;

            int swingShift = 0;

            int nightShift = 0;

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

            if (i == 1)

            {

                foreach (int val in listNumbers)

                {

                    var emp = employees.ElementAt(val-1);

                    if (nightShift < 1)

                    {

                        Console.WriteLine("Night");

                        nightShift++;

                    }

                    if (swingShift < 2)

                    {

                        Console.WriteLine("Swing");

                        swingShift++;

                    }

                    if (dayShift < 2)

                    {

                        Console.WriteLine("Day");

                        dayShift++;

                    }

                    for (int day = 1; day <= DateTime.DaysInMonth(CurrentDate.Year, CurrentDate.Month); day++)

                    {

                        if (Weeks.ElementAt(0).Value >= day)

                            Console.WriteLine(emp.Name);

                    }

                }

            }

​

        }

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

        //int dayShift = 0;

        //int swingShift = 0;

        //int nightShift = 0;

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

        for (int day = 1; day <= DateTime.DaysInMonth(CurrentDate.Year, CurrentDate.Month); day++)

        {

            if (Weeks.ElementAt(0).Value >= day) // implement working days on the first week.

            {

                // dni pierwszego tygodnia

                foreach (int val in listNumbers)

                {

                    var emp = employees.ElementAt(val-1);

                    //Console.WriteLine(emp.Name);

                    //if (nightShift < 1)

                        //Console.WriteLine("Night");

                    //if (weekWork.WorkingDay <= 5)

                    //  workingDays--;

                }

                    //Console.WriteLine(workingDays);

                //workingDays--;

            }

            if ((Weeks.ElementAt(0).Value < day) && (Weeks.ElementAt(3).Value >= day))

                //Console.WriteLine();

            if ((Weeks.ElementAt(3).Value < day) && (Weeks.ElementAt(4).Value >= day)) // implement working days on the last week.

            {

                //Console.WriteLine("Last Week");

            }

        }       

    }

}

​