using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;

namespace Caliburn.Micro.Core
{
    /// <summary>
    /// A collection of extension methods to help with differing reflection between the portable library and SL5
    /// </summary>
    internal static class PortableReflectionExtensions {

        public static bool IsAssignableFrom(this Type t, Type c) {
            return t.GetTypeInfo().IsAssignableFrom(c.GetTypeInfo());
        }

        public static Type[] GetGenericArguments(this Type t) {
            return t.GetTypeInfo().GenericTypeArguments;
        }

        public static IEnumerable<PropertyInfo> GetProperties(this Type t) {
            return t.GetRuntimeProperties();
        }

        public static IEnumerable<ConstructorInfo> GetConstructors(this Type t) {
            return t.GetTypeInfo().DeclaredConstructors;
        }

        public static IEnumerable<Type> GetInterfaces(this Type t) {
            return t.GetTypeInfo().ImplementedInterfaces;
        }

        public static IEnumerable<Type> GetTypes(this Assembly a) {
            return a.DefinedTypes.Select(t => t.AsType());
        }

        public static bool IsAbstract(this Type t) {
            return t.GetTypeInfo().IsAbstract;
        }

        public static bool IsInterface(this Type t) {
            return t.GetTypeInfo().IsInterface;
        }

        public static bool IsGenericType(this Type t) {
            return t.GetTypeInfo().IsGenericType;
        }

        public static MethodInfo GetMethod(this Type t, string name, Type[] parameters) {
            return t.GetRuntimeMethod(name, parameters);
        }
    }
}