using System;
using System.Reflection;

namespace BitStrap
{
	public static class ReflectionHelper
	{
		public static readonly object[] EmptyArgs = new object[0];

		public static TField[] GetFieldValuesOfType<TField>(object instance)
		{
			return GetFieldValuesOfType<TField>(instance, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
		}

		public static TField[] GetFieldValuesOfType<TField>(object instance, BindingFlags bindingFlags)
		{
			FieldInfo[] fields = instance.GetType().GetFields(bindingFlags);
			int num = fields.Count((FieldInfo f) => typeof(TField).IsAssignableFrom(f.FieldType));
			TField[] array = new TField[num];
			int num2 = 0;
			FieldInfo[] array2 = fields;
			foreach (FieldInfo fieldInfo in array2)
			{
				if (typeof(TField).IsAssignableFrom(fieldInfo.FieldType))
				{
					array[num2++] = (TField)fieldInfo.GetValue(instance);
				}
			}
			return array;
		}

		public static FieldInfo[] GetFieldsOfType<TField>(Type type)
		{
			return GetFieldsOfType<TField>(type, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
		}

		public static FieldInfo[] GetFieldsOfType<TField>(Type type, BindingFlags bindingFlags)
		{
			FieldInfo[] fields = type.GetFields(bindingFlags);
			int num = fields.Count((FieldInfo f) => typeof(TField).IsAssignableFrom(f.FieldType));
			FieldInfo[] array = new FieldInfo[num];
			int num2 = 0;
			FieldInfo[] array2 = fields;
			foreach (FieldInfo fieldInfo in array2)
			{
				if (typeof(TField).IsAssignableFrom(fieldInfo.FieldType))
				{
					array[num2++] = fieldInfo;
				}
			}
			return array;
		}

		public static T GetCustomAttribute<T>(this Type type, bool inherit) where T : Attribute
		{
			return type.GetCustomAttributes(typeof(T), inherit).FirstOrDefault() as T;
		}
	}
}