using System.Collections;
using System.Linq;

namespace Developpez.Dotnet
{
    internal static class CompatibilityHelper
    {
        public static class Enum
        {
            public static IEnumerable GetValues(System.Type type)
            {
#if SILVERLIGHT
                var fields = type.GetFields(System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public);
                return fields.Where(f => f.IsLiteral).Select(f => f.GetValue(null)).ToArray();
#else
                return System.Enum.GetValues(type);
#endif
            }

            
        }

        public class RegexOptions
        {
#if SILVERLIGHT
            public const System.Text.RegularExpressions.RegexOptions Compiled = System.Text.RegularExpressions.RegexOptions.None;
#else
            public const System.Text.RegularExpressions.RegexOptions Compiled = System.Text.RegularExpressions.RegexOptions.Compiled;
#endif
        }

        public class Math
        {
            public static int DivRem(int a, int b, out int result)
            {
#if SILVERLIGHT
                int c = a / b;
                result = a - (b * c);
                return c;
#else
            return System.Math.DivRem(a, b, out result);
#endif
            }

            public static long DivRem(long a, long b, out long result)
            {
#if SILVERLIGHT
                long c = a / b;
                result = a - (b * c);
                return c;
#else
            return System.Math.DivRem(a, b, out result);
#endif
            }

            public static double Truncate(double value)
            {
#if SILVERLIGHT
                return value < 0 ? System.Math.Ceiling(value) : System.Math.Floor(value);
#else
                return System.Math.Truncate(value);
#endif
            }

            public static decimal Truncate(decimal value)
            {
#if SILVERLIGHT
                return decimal.Truncate(value);
#else
                return System.Math.Truncate(value);
#endif
            }

        }
    }

}