#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion

using System;
using System.Xml;
using System.Globalization;

namespace Newtonsoft.Json.Utilities
{
  internal static class DateTimeUtils
  {
    public static string GetUtcOffsetText(this DateTime d)
    {
      TimeSpan utcOffset = d.GetUtcOffset();

      return utcOffset.Hours.ToString("+00;-00", CultureInfo.InvariantCulture) + ":" + utcOffset.Minutes.ToString("00;00", CultureInfo.InvariantCulture);
    }

    public static TimeSpan GetUtcOffset(this DateTime d)
    {
#if NET20
      return TimeZone.CurrentTimeZone.GetUtcOffset(d);
#else
      return TimeZoneInfo.Local.GetUtcOffset(d);
#endif
    }

#if !(NETFX_CORE || PORTABLE)
    public static XmlDateTimeSerializationMode ToSerializationMode(DateTimeKind kind)
    {
      switch (kind)
      {
        case DateTimeKind.Local:
          return XmlDateTimeSerializationMode.Local;
        case DateTimeKind.Unspecified:
          return XmlDateTimeSerializationMode.Unspecified;
        case DateTimeKind.Utc:
          return XmlDateTimeSerializationMode.Utc;
        default:
          throw MiscellaneousUtils.CreateArgumentOutOfRangeException("kind", kind, "Unexpected DateTimeKind value.");
      }
    }
#endif
  }
}
