using System.Collections.Generic;
using System.Configuration;
using Kreta.Core.MessageBroker.Azure.EventHub.Client.Configuration;

namespace Kreta.MessageBroker.Configuration
{
    public class EventHubClientConfigurationElementCollection : ConfigurationElementCollection, IEnumerable<IAzureEventHubClientConfiguration>
    {
        #region [Properties]

        /// <summary>
        /// Collection type
        /// </summary>
        public override ConfigurationElementCollectionType CollectionType
        {
            get { return ConfigurationElementCollectionType.BasicMap; }
        }

        /// <summary>
        /// Get element name 
        /// </summary>
        protected override string ElementName
        {
            get { return "EventHub"; }
        }

        #endregion

        #region [Private/Protected Methods]

        /// <summary>
        /// Create new element
        /// </summary>
        /// <returns>Configuration element</returns>
        protected override ConfigurationElement CreateNewElement()
        {
            return new EventHubClientConfigurationElement();
        }

        /// <summary>
        /// Get element key
        /// </summary>
        /// <param name="element">Element</param>
        /// <returns>Element key</returns>
        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((EventHubClientConfigurationElement)element).Name;
        }

        IEnumerator<IAzureEventHubClientConfiguration> IEnumerable<IAzureEventHubClientConfiguration>.GetEnumerator()
        {
            var enumerator = base.GetEnumerator();

            var eventHubClientConfiguration = new List<IAzureEventHubClientConfiguration>();

            while (enumerator.MoveNext())
            {
                eventHubClientConfiguration.Add((IAzureEventHubClientConfiguration)enumerator.Current);
            }

            return eventHubClientConfiguration.GetEnumerator();
        }

        #endregion
    }
}