using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace HelloWorld
{
	public class Program
	{
		public static void Main(string[] args)
		{
			Random rand = new Random();
		Room[] rooms = new Room[10];
		Profile user = new Profile();
		user.setName("Bill Buddy");
		user.setStartTime(new DateTime(2021, 6, 16, 7, 0, 0));
		
			
			for (int i = 1; i < 10; i++)
			{
				rooms[i] = new Room(i, rand.Next(0, 7));
				Console.WriteLine($"Room {i}");
			}
		rooms[2].Reserve(user.Name, 'A', user.StartTime, 5);
		Console.WriteLine("Select A Room (0 to exit):");
		string selection = Console.ReadLine();
			Console.Clear();
			string[] choices = { "1. Reserve Room", "2. Check Availability" };
			foreach (string choice in choices)
			{
				Console.WriteLine(choice);
			}
			string sel = Console.ReadLine();
			Console.Clear();
			int roomsel = Int32.Parse(selection);
			int logicsel = Int32.Parse(sel);
			switch (logicsel)
			{
				case 1:
					Console.WriteLine("Name: ");
					string name = Console.ReadLine();
					Console.WriteLine("Desk ID: ");
					string deskID = Console.ReadLine();
					char id = deskID[0];
					Console.WriteLine("Date (mm/dd/yyyy): ");
					string date = Console.ReadLine();
					string[] days = date.Split('/');
					int[] dayz = { Int32.Parse(days[2]), Int32.Parse(days[1]), Int32.Parse(days[0]) };
					DateTime day = new DateTime(DateTime.Now.Year, dayz[2], dayz[1]);
					Console.WriteLine("Duration: ");
					string dura = Console.ReadLine();
					double duration = Double.Parse(dura);

					rooms[roomsel].Reserve(name, id, day, duration);
					break;
				case 2:
					break;
			}
    
		}
	}
	public class Room
{
	int ID;
	Desk[] Desks;
	int Capacity;

	public Room(int id, int capacity)
	{
		ID = id;
		Capacity = capacity;
		Desks = new Desk[capacity];

        for (int i = 0; i < Desks.Length; i++)
        {
			int temp = 65 + i;
			Desks[i] = new Desk((char)temp);
        }
	}

	public bool Reserve(string name, char deskID, DateTime date, double duration)
    {
        if (CheckDesk(deskID, date))
        {
			Profile temp = new Profile();
			temp.Name = name;
			temp.StartTime = date.AddHours(7);
			temp.EndTime = date.AddHours(duration);
			GetDesk(deskID).AddProfile(temp);
			Console.WriteLine($"{name} Reserved Desk {deskID} In Room {ID} on {date} to {temp.EndTime}");
			return true;
        }
		return false;
    }
	bool CheckDesk(char ID, DateTime date)
    {
        for (int i = 0; i < Capacity; i++)
        {
			if(Desks[i].ID == ID)
            {
                foreach (Profile profile in Desks[i].GetProfiles())
                {
					if(profile.StartTime.Day == date.Day)
                    {
						Console.WriteLine("This Room Is Unavailable.");
						return false;
                    }
                }
				return true;
            }
			else if(Desks[i] == null)
            {
				Console.WriteLine("ERROR: A Desk Returned NULL");
				return false;
            }
        }
		return false;
    }
	Desk GetDesk(char ID)
    {
			for (int i = 0; i < Capacity; i++)
			{
				if (Desks[i].ID == ID)
				{
					return Desks[i];
				}
			}
			return null;
	}
}

public class Desk
{
	public char ID;
	List<Profile> Profiles;

    public Desk(char id)
    {
		ID = id;
		Profiles = new List<Profile>();
    }

	public void AddProfile(Profile profile)
    {
		Profiles.Add(profile);
    }
	public void RemoveProfile(Profile profile)
    {
		Profiles.Remove(profile);
    }
	public List<Profile> GetProfiles()
    {
		return Profiles;
    }
}

public class Profile
{
	public string Name;
	public DateTime StartTime;
	public DateTime EndTime;

	public void setName(string name)
    {
		Name = name;
    }
	public void setStartTime(DateTime StartTime)
    {
		this.StartTime = StartTime;
    }
}
}