using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var shop = new ConsignmentShop();

        shop.ShowMenu();

    }

}

​

public class Item{

​

    public string Name {get;set;}

    public string Description {get;set;}

    public decimal Price {get;set;}

    public bool IsSold {get;set;}

    public bool IsPaymentDone {get;set;}

    public Vendor Vendor {get;set;}

    public int Stock {get;set;}

    public override string ToString(){

        return $"{this.Name} {this.Price}";

    }

}

​

public class Vendor{

    public string FirstName {get;set;}

    public string LastName {get;set;}

    public decimal Commission {get;set;}

    public decimal PaymentDue {get;set;}    

    public override string ToString(){

        return $"{this.FirstName} {this.LastName}"; 

    }

}

​

public class Store{

    public string Name{get;set;}

    public string City{get;set;}

    public string ZipCode{get;set;}

    public string Country{get;set;}

    public string Address1{get;set;}

    public string Address2{get;set;}

    public List<Vendor> Vendors{get; private set;}

    public List<Item> Items {get;private set;}

    public Store(){

        this.Vendors = new List<Vendor>();

        this.Items = new List<Item>();

    }

    public void AddVendor(Vendor vendor){

        this.Vendors.Add(vendor);

    }

    public void AddItem(Item item){

        this.Items.Add(item);

    }

}

​

public class ConsignmentShop{

    private List<KeyValuePair<Item, int>> ItemsInShoppingCart{get;set;}

    private Store store {get;set;}

    public ConsignmentShop(){

        this.ItemsInShoppingCart = new List<KeyValuePair<Item, int>>(); 

        SetupStore();

    }

    private void SetupStore(){

        this.store = new Store{Name= "My Store"};

        this.store.AddVendor(new Vendor{FirstName = "Vladimir", LastName = "Gerasimenok", Commission = 0.2m, PaymentDue = 0});

        this.store.AddVendor(new Vendor{FirstName = "Raja", LastName = "Mani", Commission = 0.3m, PaymentDue = 0});

        this.store.AddItem(new Item{Name = "C# in a Nutshell", Description = "A book from O'Reiley", Price = 50.0m, IsSold = false, IsPaymentDone = false, Vendor = this.store.Vendors[0], Stock = 10});

        this.store.AddItem(new Item{Name = "Apple AirPods", Description = "Headphones from Apple", Price = 250.0m, IsSold = false, IsPaymentDone = false, Vendor = this.store.Vendors[1], Stock = 5});

        this.store.AddItem(new Item{Name = "Samsung Galyx S20+", Description = "Samsung phone", Price = 1200.0m, IsSold = false, IsPaymentDone = false, Vendor = this.store.Vendors[0], Stock = 3});

        this.store.AddItem(new Item{Name = "iMac 2011", Description = "A computer from Apple", Price = 575.0m, IsSold = false, IsPaymentDone = false, Vendor = this.store.Vendors[1], Stock = 2});

        this.store.AddItem(new Item{Name = "AOC AG352UCG", Description = "AOC Ultrawide monitor", Price = 790.0m, IsSold = false, IsPaymentDone = false, Vendor = this.store.Vendors[0], Stock = 5});

    }

    public void ShowMenu(){

        Console.WriteLine(this.store.Name);

        int index = 1;

        foreach( var item in this.store.Items){         

            Console.WriteLine($"{index++}. {item.Name}");           

        }

        Console.WriteLine("A - Add item to shoppping cart");

        Console.WriteLine("L - List items in shoppping cart");

        Console.WriteLine("O - Order items in shopping cart");

        Console.WriteLine("X - Exit");

        while(true){

            Console.WriteLine("Enter your choice");

            var choice = Console.ReadLine();

            switch(choice){

                case "A":

                    Console.WriteLine("Enter Item number, quantity");

                    var itemInfo = Console.ReadLine();

                    int itemIndex = Convert.ToInt32(itemInfo.Split(',')[0]);

                    int quantity = Convert.ToInt32(itemInfo.Split(',')[1]);

                    if(this.store.Items[itemIndex].Stock >= quantity){

                        this.ItemsInShoppingCart.Add(new KeyValuePair<Item,int>(this.store.Items[itemIndex], quantity));

                        this.store.Items[itemIndex].Stock -= quantity;

                    }else{

                        Console.WriteLine($"Sorry, the item {this.store.Items[itemIndex].Name} is out of stock! Remaining Items: {this.store.Items[itemIndex].Stock}"); 

                    }

                    break;

                case "L":

                    foreach(var item in this.ItemsInShoppingCart){

                        Console.WriteLine($"{item.Key.Name} X {item.Value} = {item.Key.Price * item.Value}");

                    }

                    break;

                case "X":

                    return;

                case "O":

                    decimal storeProfit=0;

                    foreach(var item in this.ItemsInShoppingCart){

                        item.Key.Vendor.PaymentDue += item.Key.Vendor.Commission * (item.Value * item.Key.Price);

                        storeProfit += (item.Value * item.Key.Price) * (1 - item.Key.Vendor.Commission);

                        Console.WriteLine($"{item.Key.Name} X {item.Value} = {item.Key.Price * item.Value}");

                    }

                    foreach(var vendor in this.store.Vendors){

                        Console.WriteLine($"Vendor Profit: {vendor.ToString()}: {vendor.PaymentDue}");

                    }

                    Console.WriteLine($"Store Profit: {storeProfit}");

                    break;

            }

        }

    }

}