using System;

using System.Collections.Generic;

using System.Text;

​

​

public class Program

{

    public static List<Tuple<DateTime,int>> masterlist;

    public static void Main()

    {

        DateTime? FSDateStart = null;

        DateTime? NFSDateStart = null;

        DateTime? FSDateEnd = null;

        DateTime? NFSDateEnd = null;        

        bool FSPrevious = false;

        bool NFSPrevious = false;

        // we have numbers representing dates and numbers representing categories

        // Some categories are meaningless others are not

        //

        // Categories inv-for sale, inv-rehab, inv-demo, inv-install, all others ignore who cares

        // 1=forsale 2 =rehab, 3=demo 4 = install  

        // Rules : LAtest date where it became for sale from either nothing or one of the others

        //          but within constraint of < 5/1/17

​

        masterlist = new List<Tuple<DateTime,int>>();

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,02,10),9));

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,02,10),1));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,08,25),9));        

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,09,23),9));

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,11,08),2));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2016,12,02),3));

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,03,03),4));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,03,06),4));

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,03,30),1));

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,05,22),3));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,05,26),1));        

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,07,10),1));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,03,30),1));        

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,07,12),12));

​

        masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,07,14),4));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,07,14),8));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,07,28),8));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,10,03),3));    

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,11,14),8));

//      masterlist.Add(new Tuple<DateTime,int>(new DateTime(2017,11,27),2));        

        masterlist.Sort((x, y) => x.Item1.CompareTo(y.Item1));

//      masterlist.ForEach(x => Console.WriteLine("Category: " +  x.Item2 + "  " + x.Item1.ToShortDateString()));

        Console.WriteLine();

​

        masterlist.ForEach(x => {

            switch(x.Item2)

            {

                case 2:

                case 3:

                case 4: 

​

                    if(!NFSPrevious){

                        //Console.WriteLine("NFS Is First Found on " + x.Item1.ToShortDateString());

                        NFSPrevious = true;

                        NFSDateEnd = x.Item1.AddDays(1);;

                        NFSDateStart = x.Item1;

                        if(FSPrevious){FSDateEnd = x.Item1; }

                    }

                    else{

                            //Console.WriteLine("NFS Found on " + x.Item1.ToShortDateString());

                            NFSDateEnd = x.Item1;

                        }

                    FSPrevious = false;

                break;

                case 1:

​

                    if(!FSPrevious){                        

                        //Console.WriteLine("FS is first Found on "+ x.Item1.ToShortDateString());

                        FSPrevious = true;

                        if(NFSPrevious){NFSDateEnd = x.Item1;}

                        FSDateEnd = x.Item1.AddDays(1);

                        FSDateStart = x.Item1;

                        if(NFSPrevious){NFSDateEnd = x.Item1;}

                    }

                    else{

                            //Console.WriteLine("FS Found on "+ x.Item1.ToShortDateString());

                            FSDateEnd = x.Item1;

                        }

                    NFSPrevious = false;                

                break;

              default:

                //Console.WriteLine("Skipped");

                break;

            }

​

        }

                          );

        if(NFSDateStart == null && NFSDateEnd != null){Console.WriteLine("Somehow NFSDateEnd was not null but NFSDateStart was.");}

        if(NFSDateStart != null && NFSDateEnd == null){Console.WriteLine("Somehow NFSDateStart was not null but NFSDateEnd was.");}     

        if(NFSDateStart == null && NFSDateEnd == null){NFSDateStart = DateTime.MinValue;NFSDateEnd=DateTime.MinValue;Console.WriteLine("There were no Not for sales");}

        if(FSDateStart == null && FSDateEnd == null){FSDateStart = DateTime.MinValue;FSDateEnd=DateTime.MinValue;Console.WriteLine("There were no for sales");}         

        if(FSDateStart != null && FSDateEnd == null){FSDateEnd = FSDateStart.Value.AddDays(1);Console.WriteLine("FSDateEnd Set to FSDateSTart !!!");}                                              

        if(NFSDateStart != null && NFSDateEnd == null){NFSDateEnd = NFSDateStart.Value.AddDays(1);Console.WriteLine("NFSDateEnd Set to NFSDateSTart !!!");}                                                        

        Console.WriteLine();

        Console.WriteLine("Latest Date For Sale is  " + FSDateStart.Value.ToShortDateString() );

        Console.WriteLine("Days Not For Sale {1} to {2} is {0} ", (NFSDateEnd-NFSDateStart).Value.TotalDays,NFSDateStart.Value.ToShortDateString(),NFSDateEnd.Value.ToShortDateString());   

​

        Console.WriteLine("Days For Sale {1} to {2} is {0} ", (FSDateEnd-FSDateStart).Value.TotalDays,FSDateStart.Value.ToShortDateString(),FSDateEnd.Value.ToShortDateString());

        if(NFSDateEnd > FSDateEnd){Console.WriteLine("Unit is not for Sale");}

        if(FSDateEnd > NFSDateEnd){Console.WriteLine("Unit is for Sale");}

​

    }

}