04. SoftUni Coffee Supplies [with classes]

using System;
using System.Collections.Generic;
using System.Linq;

namespace SoftUniCoffeeSupplies2
{
    class Program
    {
        static void Main()
        {
            string[] delimiters = Console.ReadLine().Split(' ');
            string personDelimiter = delimiters[0];
            string coffeeDelimiter = delimiters[1];
            string input = Console.ReadLine();

            //Lists to hold the objects
            var people = new List<Person>();
            var coffees = new List<Coffee>();

            //First loop for input
            while (input != "end of info")
            {
                int personSplitIndex = input.IndexOf(personDelimiter);
                int coffeSplitIndex = input.IndexOf(coffeeDelimiter);

                //Check whitch type the input is
                if (personSplitIndex != -1)
                {
                    //PersonName[firstDelimiter]CoffeeType
                    people.Add(Person.ReadPerson(input, personSplitIndex, personDelimiter));

                    //Check if his coffee exists
                    string coffeeName = input.Remove(0, personSplitIndex + personDelimiter.Length);
                    bool exists = false;
                    foreach (var coffee in coffees)
                    {
                        if (coffee.Name == coffeeName)
                        {
                            //Exists
                            exists = true;
                        }
                    }
                    if (!exists)
                    {
                        //Does not exist. Create it
                        coffees.Add(Coffee.CreateCoffee(0,coffeeName));
                    }
                }
                else if (coffeSplitIndex != -1)
                {
                    //CoffeeType[secondDelimiter]Quantity
                    string coffeeName = input.Substring(0, coffeSplitIndex);
                    int quantity = int.Parse(input.Remove(0, coffeSplitIndex + delimiters[1].Length));

                    //Check if object for this coffee exists
                    bool exists = false;
                    foreach (var coffee in coffees)
                    {
                        if (coffee.Name == coffeeName)
                        {
                            //Exists. Update quantity
                            coffee.Quantity += quantity;
                            exists = true;
                            break;
                        }
                    }
                    if (!exists)
                    {
                        //It does not exist. Create it
                        coffees.Add(Coffee.CreateCoffee(quantity, coffeeName));
                    }
                }

                //Keep getting input until "end of info"
                input = Console.ReadLine();
            }

            //Second Loop for input
            input = Console.ReadLine();
            while (input != "end of week")
            {
                string[] elements = input.Split(' ');
                string name = elements[0];
                int amount = int.Parse(elements[1]);

                //Check who this person is
                foreach (var person in people)
                {
                    if (person.Name == name)
                    {
                        //Person found. Add amount
                        person.Amount += amount;

                        //Get what coffe he drinks and find it
                        string coffeeName = person.CoffeeName;
                        foreach (var coffee in coffees)
                        {
                            if (coffee.Name == coffeeName)
                            {
                                //Coffe found. Add amount drunk
                                coffee.Drunk += amount;
                            }
                        }
                    }
                }

                //Keep getting input until "end of week"
                input = Console.ReadLine();
            }

            //Start printing
            foreach (var coffee in coffees)
            {
                if (coffee.IsLeft()<=0)
                {
                    //Print each coffee type out of stock
                    Console.Out.WriteLine($"Out of {coffee.Name}");
                }
            }
            Console.Out.WriteLine("Coffee Left:");
            foreach (var coffee in coffees.OrderBy(x => -x.IsLeft()))
            {
                if (coffee.IsLeft() > 0)
                {
                    //Print each coffee type in stock
                    //ordered by quantity
                    Console.Out.WriteLine($"{coffee.Name} {coffee.IsLeft()}");
                }
            }
            Console.Out.WriteLine("For:");
            foreach (var coffee in coffees.OrderBy(x => x.Name))
            {
                if (coffee.IsLeft() > 0)
                {
                    foreach (var person in people.OrderByDescending(x => x.Name))
                    {
                        if (coffee.Name == person.CoffeeName)
                        {
                            //Print each person whose coffe is in stock
                            //ordered first by coffe name then by person name
                            Console.Out.WriteLine($"{person.Name} {coffee.Name}");
                        }
                    }
                }
            }
        }
    }
}

class Person
{
    //Parameters
    public int Amount { get; set; }
    public string CoffeeName { get; set; }
    public string Name { get; set; }

    //Actions
    public static Person ReadPerson(string input, int personSplitIndex, string personDelimiter)
    {
        string coffeeName = input.Remove(0, personSplitIndex + personDelimiter.Length);
        var person = new Person
        {
            Name = input.Substring(0, personSplitIndex),
            CoffeeName = coffeeName,
            Amount=0
        };
        return person;
    }
}

class Coffee
{
    //Parameters
    public string Name { get; set; }
    public int Quantity { get; set; }
    public int Drunk { get; set; }

    //Actions
    public static Coffee CreateCoffee(int quantity, string name)
    {
        var coffee = new Coffee
        {
            Name = name,
            Quantity = quantity,
            Drunk=0
        };
        return coffee;
    }

    public int IsLeft()
    {
        int left = Quantity - Drunk;
        return left;
    }
}