using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autofac;
using Autofac.Integration.Mvc;
using GreenTree.Nachtragsmanagement.Data;
using GreenTree.Nachtragsmanagement.Services.DbContext;

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 container builder
        /// </summary>
        private static IContainer _appContainer;

        #endregion

        #region Services

        /// <summary>
        /// Returns the generel DbContextService
        /// </summary>
        public DbContextService DbContextService { get; set; }

        #endregion

        #region Ctor

        /// <summary>
        /// Initializes a new instance of the ApplicationContext class
        /// </summary>
        public ApplicationContext()
        {
            DbContextService = new DbContextService(_appContainer.Resolve<IDbContext>());
        }

        #endregion

        #region Initialization

        /// <summary>
        /// Registers all ressources needed by the ApplicationContext
        /// </summary>
        public static void Init()
        {
            var appBuilder = new ContainerBuilder();

            appBuilder
                .RegisterInstance(new AppendixObjectContext("Server=localhost\\SQLEXPRESS;Database=Nachtragsmanagement;User Id=nachtragdat;Password=nachtragdat;"))
                .As<IDbContext>()
                .SingleInstance();

            _appContainer = appBuilder.Build();
        }

        #endregion
    }
}