using Alchemy;
using Alchemy.Classes;
using MediaBrowser.Common.Net;
using MediaBrowser.Model.Logging;
using System;
using System.Net;

namespace MediaBrowser.Server.Implementations.WebSocket
{
    /// <summary>
    /// Class AlchemyServer
    /// </summary>
    public class AlchemyServer : IWebSocketServer
    {
        /// <summary>
        /// Occurs when [web socket connected].
        /// </summary>
        public event EventHandler<WebSocketConnectEventArgs> WebSocketConnected;

        /// <summary>
        /// Gets or sets the web socket server.
        /// </summary>
        /// <value>The web socket server.</value>
        private WebSocketServer WebSocketServer { get; set; }

        /// <summary>
        /// The _logger
        /// </summary>
        private readonly ILogger _logger;

        /// <summary>
        /// Initializes a new instance of the <see cref="AlchemyServer" /> class.
        /// </summary>
        /// <param name="logger">The logger.</param>
        /// <exception cref="System.ArgumentNullException">logger</exception>
        public AlchemyServer(ILogger logger)
        {
            if (logger == null)
            {
                throw new ArgumentNullException("logger");
            }
            _logger = logger;
        }

        /// <summary>
        /// Gets the port.
        /// </summary>
        /// <value>The port.</value>
        public int Port { get; private set; }

        /// <summary>
        /// Starts the specified port number.
        /// </summary>
        /// <param name="portNumber">The port number.</param>
        public void Start(int portNumber)
        {
            WebSocketServer = new WebSocketServer(portNumber, IPAddress.Any)
            {
                OnConnected = OnAlchemyWebSocketClientConnected,
                TimeOut = TimeSpan.FromHours(12)
            };

            WebSocketServer.Start();

            Port = portNumber;

            _logger.Info("Alchemy Web Socket Server started");
        }

        /// <summary>
        /// Called when [alchemy web socket client connected].
        /// </summary>
        /// <param name="context">The context.</param>
        private void OnAlchemyWebSocketClientConnected(UserContext context)
        {
            if (WebSocketConnected != null)
            {
                var socket = new AlchemyWebSocket(context, _logger);

                WebSocketConnected(this, new WebSocketConnectEventArgs
                {
                    WebSocket = socket,
                    Endpoint = context.ClientAddress.ToString()
                });
            }
        }

        /// <summary>
        /// Stops this instance.
        /// </summary>
        public void Stop()
        {
            if (WebSocketServer != null)
            {
                WebSocketServer.Stop();
            }
        }

        /// <summary>
        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
        /// </summary>
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        /// <summary>
        /// Releases unmanaged and - optionally - managed resources.
        /// </summary>
        /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
        protected virtual void Dispose(bool dispose)
        {
            if (WebSocketServer != null)
            {
                WebSocketServer.Dispose();
            }
        }
    }
}