using System.Collections.Generic;

namespace IPLocationServerTool.Model
{    
    /// <summary>
    /// Represents a collection which is readonly to outside of objects that can be individually accessed by index 
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public interface INotificationList<T> : IEnumerable<T>
    {
        #region Data Members and Events 

        // Data Members 

        /// <summary>
        /// Gets the number of elements contained in the <see cref="IReadableList{T}"/>
        /// </summary>
        int Count { get; }

        /// <summary>
        /// Gets the element at the specified index.
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        T this[int index] { get; }

        bool IsEmpty { get; }

        #endregion Data Members and Events 

        #region Operations 

        /// <summary>
        /// Determines whether the <see cref="IReadableList{T}"/> contains a specific value.
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        bool Contains(T item);

        /// <summary>
        /// Searches for the specified object 
        /// and returns the zero-based index of the first occurrence within the entire <see cref="IReadableList{T}"/>.
        /// </summary>
        /// <param name="item"></param>
        /// <returns>
        /// The zero-based index of the first occurrence of item within the entire <see cref="IReadableList{T}"/>, if found; 
        /// otherwise, –1.</returns>
        int IndexOf(T item);

        ///// <summary>
        ///// Gets the first element, if list is empty, then default value is returned
        ///// </summary>
        //T FirstOrDefault();

        ///// <summary>
        ///// Gets the last element, if list is empty, then default value is returned
        ///// </summary>
        //T LastOrDefault();

        #endregion Operations 
    }
}