using System;

using System.Collections.Generic;

​

namespace MyScript

{

    class Program

    {

        enum InventoryOwnerType

        {

            None,

            Player,

            InventoryItem

        }

        struct InventoryOwner

        {

            public int id;

            public InventoryOwnerType type;

            public InventoryOwner(int id, InventoryOwnerType type)

            {

                this.id = id;

                this.type = type;

            }

        }

        class Item

        {

            public Inventory items;

            public InventoryOwner ownerInfo;

            public int id;

            public int type;

            public int amount;

            public DateTime createTime;

            public Item(int id, int type, int amount, InventoryOwner ownerInfo = default, DateTime createTime = default)

            {

                this.id = id;

                this.type = type;

                this.amount = amount;

                this.ownerInfo = ownerInfo;

                this.createTime = createTime == default ? DateTime.Now : createTime;

                items = new Inventory(id, InventoryOwnerType.InventoryItem);

            }

            public void PrintInfo()

            {

                Console.WriteLine($"[ownerId: {ownerInfo.id} | ownerType: {ownerInfo.type}]");

                Console.WriteLine($"[id: {id} | type: {type} | amount: {amount} | createTime: {createTime}]");

            }

        }

        class Inventory

        {

            public static int createdInventoryCount;

            // ---

            public InventoryOwner ownerInfo { get; private set; }

            private List<Item> _items = new List<Item>();

            public List<Item> items 

            {

                get => _items; 

                private set => _items = value;

            }

            public Inventory(int ownerId, InventoryOwnerType ownerType = InventoryOwnerType.None)

            {

                ownerInfo = new InventoryOwner(ownerId, ownerType);

                Inventory.createdInventoryCount++;

            }

            public Item this[int index]

            {

                get

                {

                    return items[index];

                }

            }

            public void AddItem(Item item)

            {

                item.ownerInfo.id = ownerInfo.id;

                item.ownerInfo.type = ownerInfo.type;

                items.Add(item);

            }

            public void AddItem(params Item[] arrItems)

            {

                foreach(var item in arrItems)

                {

                    AddItem(item);

                }

            }

            // ---

            public int GetItemsCount()

            {

                return items.Count;

            }

            public void PrintItemsInfo()

            {

                Console.WriteLine($"| inventoryOwnerInfo [id: {ownerInfo.id} | type: {ownerInfo.type}]");

                Console.WriteLine( "| itemsCount: " + GetItemsCount() + "\n|");

                foreach(var item in items)

                {

                    Console.WriteLine($"| id: {item.id} | type: {item.type} | amount: {item.amount} | createTime: {item.createTime}");

                    if(item.items.GetItemsCount() > 0)

                    {

                        item.items.PrintItemsInfo();

                    }

                }

                Console.WriteLine();

            }

        }

        public static void Main()

        {

            Console.WriteLine("Hello World");

            // ---

            var inventory = new Inventory(1, InventoryOwnerType.Player);

            inventory.AddItem

            (

                new Item(1, 1, 10),

                new Item(2, 1, 15),

                new Item(3, 1, 20),

                new Item(4, 1, 25),

                new Item(5, 1, 30)

            );

            inventory.PrintItemsInfo();

            // ---

            var inventory2 = new Inventory(2, InventoryOwnerType.Player);

            var invRef = inventory2;

            invRef.AddItem

            (

                new Item(10, 2, 50),

                new Item(11, 2, 65),

                new Item(12, 2, 70)

            );

            invRef = invRef[0].items;

            invRef.AddItem(new Item(15, 3, 100));

            invRef.AddItem(new Item(16, 3, 120));

            invRef.AddItem(new Item(17, 3, 140));

            inventory2.PrintItemsInfo();

            inventory2[1].PrintInfo();

            inventory2[0].items[2].PrintInfo();

            // ---

            Console.WriteLine("\ninventoryCreated: " + Inventory.createdInventoryCount);

        }

    }

}