using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Configuration;
using System.Web.Mvc;
using Autofac;
using Autofac.Integration.Mvc;
using GreenTree.Nachtragsmanagement.Core.Configuration;
using GreenTree.Nachtragsmanagement.Core.Data;
using GreenTree.Nachtragsmanagement.Data;
using GreenTree.Nachtragsmanagement.Services.Configuration;
using GreenTree.Nachtragsmanagement.Services.DbContext;
using GreenTree.Nachtragsmanagement.Services.Site;
using GreenTree.Nachtragsmanagement.Services.Test;
using GreenTree.Nachtragsmanagement.Services.User;

namespace GreenTree.Nachtragsmanagement.Web.Framework
{
    public class ApplicationContext
    {
        #region Statics

        /// <summary>
        /// Current ApplicationContext
        /// </summary>
        private static ApplicationContext _current;

        /// <summary>
        /// Returns the current ApplicationContext or creates one if doesn't exist already
        /// </summary>
        public static ApplicationContext Current
        {
            get
            {
                if (_current == null)
                {
                    _current = new ApplicationContext();
                }

                return _current;
            }
        }

        #endregion

        #region Fields

        /// <summary>
        /// Returns the application wide app container builder
        /// </summary>
        private static IContainer _appContainer;

        #endregion

        #region Ctor

        /// <summary>
        /// Initializes a new instance of the ApplicationContext class
        /// </summary>
        public ApplicationContext()
        {

        }

        #endregion

        #region Initialization

        /// <summary>
        /// Registers all application ressources
        /// </summary>
        public static void InitApplication()
        {
            var builder = new ContainerBuilder();

            var connection = WebConfigurationManager.ConnectionStrings["DefaultConnection"];

            // Register object instances
            builder.RegisterInstance(new AppendixObjectContext(connection.ConnectionString)).As<IDbContext>().SingleInstance();

            // Register generic data repositorys
            builder.RegisterGeneric(typeof(EfRepository<>)).As(typeof(IRepository<>));

            // Register service types
            builder.RegisterType<ConfigurationService>().As<IConfigurationService>();
            builder.RegisterType<DbRelationService>().As<IDbRelationService>();
            builder.RegisterType<UserService>().As<IUserService>();
            builder.RegisterType<SiteService>().As<ISiteService>();

            // Register controllers
            builder.RegisterControllers(Assembly.GetCallingAssembly());

            // Register modules
            builder.RegisterModule(new AutofacWebTypesModule());

            _appContainer = builder.Build();

            DependencyResolver.SetResolver(new AutofacDependencyResolver(_appContainer));
        }

        #endregion
    }
}