using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Autofac;

namespace Example.Common
{
    public static class IoC
    {
        private static IContainer _container { get; set; }
        private static ContainerBuilder builder = new ContainerBuilder();
        static List<Assembly> allAssemblies = new List<Assembly>();

        public static IContainer Container
        {
            get
            {
                if (_container == null)
                {
                    Init();
                }
                return _container;
            }
        }

        public static void Init()
        {
            LoadEveryAssembly();

            foreach (Assembly a in allAssemblies)
            {
                builder.RegisterAssemblyTypes(a)
                           .Where(t => t.Name.EndsWith("Context")).AsSelf().SingleInstance();

                builder.RegisterAssemblyTypes(a)
                           .Where(t => t.Name.EndsWith("Repository"));

                builder.RegisterAssemblyTypes(a)
                           .Where(t => t.Name.EndsWith("Manager"))
                           .AsImplementedInterfaces()
                           .AsSelf();

                builder.RegisterAssemblyTypes(a)
                           .Where(t => t.Name.EndsWith("Query")).AsImplementedInterfaces()
                           .AsSelf();

                builder.RegisterAssemblyTypes(a)
                           .Where(t => t.Name.EndsWith("Service"))
                           .AsImplementedInterfaces()
                           .AsSelf();
            }
            _container = builder.Build();
        }

        private static void LoadEveryAssembly()
        {
            string path = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
            foreach (string dll in Directory.GetFiles(path, "*.dll"))
                allAssemblies.Add(Assembly.LoadFile(dll));
        }
    }
}