using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace ConsoleApplication1
{
    public class Admin : ClientHandler
    {
        private string name;
        private int password ;

        public Admin(string name,int password)
        {
            this.name = name;
            this.password = password;
        }
        private bool SecCHeck(string name, int password)
        {
            if (String.Equals(this.name,name) && (this.password == password))
                return true;
            return false;
        }
        public override void ClientUi(string name,int password)
        {
            if (!SecCHeck(name, password))
            {
                Console.WriteLine(" Wrong Password");
                return;
            }
            Console.WriteLine("Admin login succsful Please choose the option you want");
            while (true)
            {
                Console.WriteLine("Please choose the option you want");
                Console.WriteLine(" 1-Stock List, 2-Add Item, 3- Remove Item, 4 Change Item, 5-Return To main Menue");
                int choice = int.Parse(Console.ReadLine());
                switch (choice)
                {
                    case 1:
                        PrintStock();
                        break;
                    case 2:
                        AddItem();
                        break;
                    case 3:
                        RemoveItem();
                        break;
                    case 4:
                        ChangeItem();
                        break;
                    case 5:
                        return;
                    default:
                        Console.WriteLine("We have encoutred a problame in your selction");
                        break;
                }
            }

        }
        private void ChangeItem()
        {
            Console.WriteLine("Pls enetr the name of the item you want to change his propties");
            string name = Console.ReadLine(),Nname;
            int Id = base.Search(name),choice,price,age;
            if (items[Id].GetType() == typeof(Animal))
            {
                Console.WriteLine("1-to change price, 2-to change name,3-to change age");
                choice = int.Parse(Console.ReadLine());
                switch (choice)
                {
                    case 1:
                        Console.WriteLine("Pls write the new price you want to set for {0}", name);
                        price = int.Parse(Console.ReadLine());
                        items[Id].SetPrice(price);
                        break;
                    case 2:
                        Console.WriteLine("Pls write the new name you want to set for {0}", name);
                        Nname = Console.ReadLine();
                        items[Id].SetName(Nname);
                        break;
                    case 3:
                        Console.WriteLine("Pls write the new age you want to set for {0}", name);
                        Animal animal = (Animal)items[Id];
                        age = int.Parse(Console.ReadLine());
                        animal.SetAge(age);
                        break;
                    default:
                        Console.WriteLine("Eror you didnt give valid choice");
                        break;
                }
            }
            else
            {
                Console.WriteLine("1-to change price, 2-to change name");
                choice = int.Parse(Console.ReadLine());
                switch (choice)
                {
                    case 1:
                        Console.WriteLine("Pls write the new price you want to set for {0}", name);
                        price = int.Parse(Console.ReadLine());
                        items[Id].SetPrice(price);
                        break;
                    case 2:
                        Console.WriteLine("Pls write the new name you want to set for {0}", name);
                        Nname = Console.ReadLine();
                        items[Id].SetName(Nname);
                        break;
                    default:
                        Console.WriteLine("Eror you didnt give valid choice");
                        break;
                }
            }


        }
        private void RemoveItem()
        {
            Console.WriteLine("Pls enter the name of the item you wish to delete");
            string name = Console.ReadLine();
            base.DeleteItem(base.Search(name));
        }

        private void AddItem()
        {
            Console.WriteLine("If you want to add an animal press 1 else if you want to add genrel item press 2");
            int choice = int.Parse(Console.ReadLine());
            if (choice == 1)
            {
                if (items[0] == null)
                {
                    Console.WriteLine("Pls enter data(price,name,age)");
                    int price = int.Parse(Console.ReadLine());
                    string name = (Console.ReadLine());
                    int age = int.Parse(Console.ReadLine());
                    items[0] = new Animal(price, name, age);
                }
                else
                {
                    Console.WriteLine("Pls enter data(price,name,age)");
                    int price = int.Parse(Console.ReadLine());
                    string name = (Console.ReadLine());
                    int age = int.Parse(Console.ReadLine());
                    items[items[0].GetAmm()] = new Animal(price, name, age);
                }

            }
            if(choice==2)
            {
                if (items[0] != null)
                {
                    Console.WriteLine("Pls enter data(price,name)");
                    int price = int.Parse(Console.ReadLine());
                    string name = (Console.ReadLine());
                    items[items[0].GetAmm()] = new Item(price, name);
                }
                else
                {
                    Console.WriteLine("Pls enter data(price,name)");
                    int price = int.Parse(Console.ReadLine());
                    string name =Console.ReadLine();
                    items[0] = new Item (price, name);
                }
            }
            else
            {
                Console.WriteLine("Eror ! argument isnt valid");
            }
        }
        protected override void PrintStock()
        {
            int i = 0;
            Console.WriteLine("name  price  age");//need to fix formating
            while (i < items.Length)
            {
                if (items[i] != null)
                    if (items[i].GetType() == typeof(Animal))
                    {
                        Animal animal = (Animal)items[i];
                        Console.WriteLine(items[i].GetName() + "  " + items[i].GetPrice() + "  " + animal.GetAge());
                    }
                else
                Console.WriteLine(items[i].GetName() + "  " + items[i].GetPrice());
                i++;
            }
            Console.WriteLine();
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public class Animal : Item
    {
        private int age;
        public Animal(int price, string name, int age) : base(price, name)
        {
            SetAge(age);

        }

        public void SetAge(int age) { this.age = age; }
        public int GetAge() { return age; }
        public override int Buy()
        {
            Console.WriteLine("Are you sure you want to buy {0} the price is {1} and the age is {2}", GetName(), GetPrice(), age);
            char answer = char.Parse(Console.ReadLine());
            if (answer == 'N')
                return 0;
            else
                return GetPrice();
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public abstract class  ClientHandler : Object
    {
        private  static int  MaxItems = 99;
        protected  static Item[] items = new Item[MaxItems];
        protected abstract void PrintStock();
        public abstract void ClientUi(string name, int password);
        protected  void DeleteItem(int itemID)
        {

            for (int i = items[0].GetAmm(); i > itemID; itemID++)
            {
                items[itemID] = items[itemID + 1];
            }
        }
        protected int  Search(string name)
        {
            int i = 0;
            while (i < MaxItems)
            {
                if (items[i] != null)
                    if (name.Equals(items[i].GetName(), StringComparison.Ordinal))
                        return i;
                i++;
            }
            return -1;
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    public class Item : Object
    {
        private static int items_amm = 0;
        private int price;
        private string name;

        public Item(int price, string name)
        {
            items_amm++;
            this.price = price;
            this.name = name;
        }
        public virtual int Buy()
        {
            Console.WriteLine("Are you sure you want to buy {0} the price is {1} press 'N' to cancel transction", name, price);
            char answer = char.Parse(Console.ReadLine());
            if (answer == 'N')
                return 0;
            else
                return price;

        }
        public int GetAmm() { return items_amm; }
        public string GetName() { return name; }
        public void SetName(string name) { this.name = name; }
        public void SetPrice(int price) { this.price = price; }
        public int GetPrice() { return price; }

    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Class : Object
    {
        static private Admin admin = new Admin("A",1);// intalizte admin password;
        public static void Main(string[] args)
        {
            Ui();
        }
        public static void Ui()
        {

            Console.WriteLine("Welcome to the pet shop");
            while (true)
            {
                Console.WriteLine("If you are coustomr press 1, if you are an opretor press 2");
            int chocie = int.Parse(Console.ReadLine());
                if (chocie == 1)
                    Console.WriteLine("Pls enter your name ");
                    string name = Console.ReadLine();
                Customer client = new Customer(name);
                }
                if (chocie == 2)
            {
                Console.WriteLine("Pls enter the username ");
                string username = Console.ReadLine();
                Console.WriteLine("and password");
                int password = int.Parse(Console.ReadLine());
                admin.ClientUi(username, password);
            }

            }
        }
    }
}