using System;
using System.Collections.Specialized;
using System.IO;
using System.Net;
using System.Text;

namespace WebDAVSharp.Server.Adapters
{
    /// <summary>
    ///     This
    ///     <see cref="IHttpListenerRequest" /> implementation wraps around a
    ///     <see cref="HttpListenerRequest" /> instance.
    /// </summary>
    internal sealed class HttpListenerRequestAdapter : IHttpListenerRequest
    {
        #region Private Variables

        private readonly HttpListenerRequest _request;

        #endregion

        #region Public Functions

        /// <summary>
        ///     Initializes a new instance of the <see cref="HttpListenerRequestAdapter" /> class.
        /// </summary>
        /// <param name="request">The <see cref="HttpListenerRequest" /> to adapt for WebDAV#.</param>
        /// <exception cref="System.ArgumentNullException">request</exception>
        /// <exception cref="ArgumentNullException"><paramref name="request" /> is <c>null</c>.</exception>
        public HttpListenerRequestAdapter(HttpListenerRequest request)
        {
            if (request == null)
                throw new ArgumentNullException(nameof(request));

            _request = request;
        }

        #endregion

        #region Properties

        /// <summary>
        ///     Gets the internal instance that was adapted for WebDAV#.
        /// </summary>
        /// <value>
        ///     The adapted instance.
        /// </value>
        public HttpListenerRequest AdaptedInstance => _request;

        /// <summary>
        ///     Gets the client IP address and port number from which the request originated.
        /// </summary>
        public IPEndPoint RemoteEndPoint => _request.RemoteEndPoint;

        /// <summary>
        ///     Gets the <see cref="Uri" /> object requested by the client.
        /// </summary>
        public Uri Url => _request.Url;

        /// <summary>
        ///     Gets the HTTP method specified by the client.
        /// </summary>
        public string HttpMethod => _request.HttpMethod;

        /// <summary>
        ///     Gets the collection of header name/value pairs sent in the request.
        /// </summary>
        public NameValueCollection Headers => _request.Headers;

        /// <summary>
        ///     Gets a <see cref="Stream" /> that contains the body data sent by the client.
        /// </summary>
        public Stream InputStream => _request.InputStream;

        /// <summary>
        ///     Gets the content <see cref="Encoding" /> that can be used with data sent with the request.
        /// </summary>
        public Encoding ContentEncoding => _request.ContentEncoding;

        /// <summary>
        ///     Gets the length of the body data included in the request.
        /// </summary>
        public long ContentLength64 => _request.ContentLength64;

        #endregion
    }
}