//
// Json.cs
//
// Author:
//   Marek Habersack <mhabersack@novell.com>
//
// (C) 2008 Novell, Inc.  http://novell.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.Globalization;

namespace Nancy.Json
{
    using System;
    using System.IO;
    using System.Text;
    
    internal static class Json
	{

    public static void Serialize (object obj, StringBuilder output)
        {
            Serialize(obj, JavaScriptSerializer.DefaultSerializer, output);    
        }

        public static void Serialize (object obj, JavaScriptSerializer jss, StringBuilder output)
		{
			JsonSerializer js = new JsonSerializer (jss);
			js.Serialize (obj, output);
			js = null;
		}

        public static void Serialize(object obj, TextWriter output)
        {
            Serialize(obj, JavaScriptSerializer.DefaultSerializer, output);
        }

		public static void Serialize (object obj, JavaScriptSerializer jss, TextWriter output)
		{
			JsonSerializer js = new JsonSerializer (jss);
			js.Serialize (obj, output);
			js = null;
		}

    	public static object Deserialize (string input)
    	{
    	    return Deserialize(input, JavaScriptSerializer.DefaultSerializer);
    	}

		public static object Deserialize (string input, JavaScriptSerializer jss)
		{
			if (jss == null)
				throw new ArgumentNullException ("jss");
			
			return Deserialize (new StringReader (input), jss);
		}

        public static object Deserialize(TextReader input)
        {
            return Deserialize(input, JavaScriptSerializer.DefaultSerializer);
        }

		public static object Deserialize (TextReader input, JavaScriptSerializer jss)
		{
			if (jss == null)
				throw new ArgumentNullException ("jss");
			
			JsonDeserializer ser = new JsonDeserializer (jss);
			return ser.Deserialize (input);
		}

        public static IFormatProvider DefaultNumberFormatInfo
        {
            get
            {
                return new NumberFormatInfo()
                                                    {NumberDecimalSeparator = ".", NumberGroupSeparator = string.Empty};
            }
            
        }

        /// <summary>
        /// Attempts to detect if the content type is JSON.
        /// Supports:
        ///   application/json
        ///   text/json
        ///   application/vnd[something]+json
        /// Matches are case insentitive to try and be as "accepting" as possible.
        /// </summary>
        /// <param name="contentType">Request content type</param>
        /// <returns>True if content type is JSON, false otherwise</returns>
        public static bool IsJsonContentType(string contentType)
        {
            if (String.IsNullOrEmpty(contentType))
            {
                return false;
            }

            var contentMimeType = contentType.Split(';')[0];

            return contentMimeType.Equals("application/json", StringComparison.InvariantCultureIgnoreCase) ||
                   contentMimeType.StartsWith("application/json-", StringComparison.InvariantCultureIgnoreCase) ||
                   contentMimeType.Equals("text/json", StringComparison.InvariantCultureIgnoreCase) ||
                  (contentMimeType.StartsWith("application/vnd", StringComparison.InvariantCultureIgnoreCase) &&
                   contentMimeType.EndsWith("+json", StringComparison.InvariantCultureIgnoreCase));
        }
	}
}
