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

namespace ProjectBus.CollectionGenericObject;

public class ListGenericObjects<T> : ICollectionGenericObjects<T>
    where T : class
{
    /// <summary>
    /// Список объектов, которые храним
    /// </summary>
    private readonly List<T?> _collection;

    /// <summary>
    /// Максимально допустимое число объектов в списке
    /// </summary>
    private int _maxCount;

    public int Count => _collection.Count;

    public int SetMaxCount { set { if (value > 0) { _maxCount = value; } } }

    /// <summary>
    /// Конструктор
    /// </summary>
    public ListGenericObjects()
    {
        _collection = new();
    }

    public T? Get(int position)
    {

        if (position < 0 || position > _collection.Count - 1)
        {
            return null;
        }
        return _collection[position];
    }

    public int Insert(T obj)
    {
        if (_collection.Count + 1 > _maxCount) { return 0; }
        _collection.Add(obj);

        return 1;
    }

    public int Insert(T obj, int position)
    {
        if (_collection.Count + 1 < _maxCount) { return 0; }
        if (position > _collection.Count || position < 0)
        {
            return 0;
        }
        _collection.Insert(position, obj);
        return 1;
    }

    public T Remove(int position)
    {
        if (position > _collection.Count || position < 0)
        {
            return null;
        }
        T temp = _collection[position];
        _collection.RemoveAt(position);
        return temp;
    }
}