using Microsoft.JScript;
using Microsoft.Win32;
using System;
using System.IO;
using System.Reflection;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
using UFSoft.U8.U8M.Common;

namespace UFIDA.U8.Framework.Api
{
    public class WebApiApplication : HttpApplication
    {
        private readonly string s_u8Root;
        private readonly string s_u8MPath;
        private readonly string s_u8FrameworkPath;
        private readonly string s_u8APIFramework;


        public WebApiApplication()
        {
            s_u8Root = GetU8InstallPath();
            s_u8MPath = $@"{s_u8Root}U8M\";
            s_u8FrameworkPath = $@"{s_u8Root}Framework\";
            s_u8APIFramework = $@"{s_u8Root}UFMOM\U8APIFramework\";


        }

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            GlobalConfiguration.Configure(WebApiConfig.Register);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            AppDomain.CurrentDomain.AssemblyResolve -= CurrentDomain_AssemblyResolve;
            AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;

        }

        //private void ConfigureDependencyInjection(HttpConfiguration config)
        //{
        //    var builder = new ContainerBuilder();
        //    //builder.RegisterType<GMUtil>().As<>();

        //    var container = builder.Build();

        //    config.DependencyResolver = new AutofacWebApiDependencyResolver(container);
        //}


        private static string GetU8InstallPath()
        {
            string root;
            var installPath = Registry.LocalMachine.OpenSubKey(GlobalConstDefine.Product_Registry_InstallKey);
            root = installPath == null ? Path.GetDirectoryName(Assembly.GetExecutingAssembly().CodeBase) : installPath.GetValue(string.Empty).ToString();
            return root += @"\";
        }

        /// <summary>
        /// 缺少程序集全局处理事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        /// <returns></returns>
        private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            //先在已经加载的程序集中选择
            foreach (var asm in AppDomain.CurrentDomain.GetAssemblies())
            {
                if (args.Name.Equals(asm.FullName))
                    return asm;
            }

            //取未加载的DLL名
            var sAsmName = args.Name.Contains(",") ? $"{args.Name.Substring(0, args.Name.IndexOf(','))}.dll" : $"{args.Name}.dll";

            //到指定的目录下找
            if (File.Exists(s_u8Root + sAsmName))
                return Assembly.LoadFrom(s_u8Root + sAsmName);
            if (File.Exists(s_u8MPath + sAsmName))
                return Assembly.LoadFrom(s_u8MPath + sAsmName);
            if (File.Exists(s_u8FrameworkPath + sAsmName))
                return Assembly.LoadFrom(s_u8FrameworkPath + sAsmName);
            if (File.Exists(s_u8APIFramework + sAsmName))
                return Assembly.LoadFrom(s_u8APIFramework + sAsmName);
            return null;
        }
    }
}