//
// HttpResponseHeaders.cs
//
// Authors:
//	Marek Safar  <marek.safar@gmail.com>
//
// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Collections.Generic;

namespace System.Net.Http.Headers
{
	public sealed class HttpResponseHeaders : HttpHeaders
	{
		internal HttpResponseHeaders ()
			: base (HttpHeaderKind.Response)
		{
		}

		public HttpHeaderValueCollection<string> AcceptRanges {
			get {
				return GetValues<string> ("Accept-Ranges");
			}
		}

		public TimeSpan? Age {
			get {
				return GetValue<TimeSpan?> ("Age");
			}
			set {
				AddOrRemove ("Age", value, l => ((long)((TimeSpan)l).TotalSeconds).ToString ()); 
			}
		}

		public CacheControlHeaderValue CacheControl {
			get {
				return GetValue<CacheControlHeaderValue> ("Cache-Control");
			}
			set {
				AddOrRemove ("Cache-Control", value);
			}
		}

		public HttpHeaderValueCollection<string> Connection {
			get {
				return GetValues<string> ("Connection");
			}
		}

		public bool? ConnectionClose {
			get {
				if (connectionclose == true || Connection.Find (l => string.Equals (l, "close", StringComparison.OrdinalIgnoreCase)) != null)
					return true;

				return connectionclose;
			}
			set {
				if (connectionclose == value)
					return;

				Connection.Remove ("close");
				if (value == true)
					Connection.Add ("close");

				connectionclose = value;
			}
		}

		public DateTimeOffset? Date {
			get {
				return GetValue<DateTimeOffset?> ("Date");
			}
			set {
				AddOrRemove ("Date", value, Parser.DateTime.ToString);
			}
		}

		public EntityTagHeaderValue ETag {
			get {
				return GetValue<EntityTagHeaderValue> ("ETag");
			}
			set {
				AddOrRemove ("ETag", value);
			}
		}

		public Uri Location {
			get {
				return GetValue<Uri> ("Location");
			}
			set {
				AddOrRemove ("Location", value);
			}
		}

		public HttpHeaderValueCollection<NameValueHeaderValue> Pragma {
			get {
				return GetValues<NameValueHeaderValue> ("Pragma");
			}
		}

		public HttpHeaderValueCollection<AuthenticationHeaderValue> ProxyAuthenticate {
			get {
				return GetValues<AuthenticationHeaderValue> ("Proxy-Authenticate");
			}
		}

		public RetryConditionHeaderValue RetryAfter {
			get {
				return GetValue<RetryConditionHeaderValue> ("Retry-After");
			}
			set {
				AddOrRemove ("Retry-After", value);
			}
		}

		public HttpHeaderValueCollection<ProductInfoHeaderValue> Server {
			get {
				return GetValues<ProductInfoHeaderValue> ("Server");
			}
		}

		public HttpHeaderValueCollection<string> Trailer {
			get {
				return GetValues<string> ("Trailer");
			}
		}

		public HttpHeaderValueCollection<TransferCodingHeaderValue> TransferEncoding {
			get {
				return GetValues<TransferCodingHeaderValue> ("Transfer-Encoding");
			}
		}

		public bool? TransferEncodingChunked {
			get {
				if (transferEncodingChunked.HasValue)
					return transferEncodingChunked;

				var found = TransferEncoding.Find (l => StringComparer.OrdinalIgnoreCase.Equals (l.Value, "chunked"));
				return found != null ? true : (bool?) null;
			}
			set {
				if (value == transferEncodingChunked)
					return;

				TransferEncoding.Remove (l => l.Value == "chunked");
				if (value == true)
					TransferEncoding.Add (new TransferCodingHeaderValue ("chunked"));

				transferEncodingChunked = value;
			}
		}

		public HttpHeaderValueCollection<ProductHeaderValue> Upgrade {
			get {
				return GetValues<ProductHeaderValue> ("Upgrade");
			}
		}

		public HttpHeaderValueCollection<string> Vary {
			get {
				return GetValues<string> ("Vary");
			}
		}

		public HttpHeaderValueCollection<ViaHeaderValue> Via {
			get {
				return GetValues<ViaHeaderValue> ("Via");
			}
		}

		public HttpHeaderValueCollection<WarningHeaderValue> Warning {
			get {
				return GetValues<WarningHeaderValue> ("Warning");
			}
		}

		public HttpHeaderValueCollection<AuthenticationHeaderValue> WwwAuthenticate {
			get {
				return GetValues<AuthenticationHeaderValue> ("WWW-Authenticate");
			}
		}
	}
}