using Autofac;
using Autofac.Configuration;
using Microsoft.Extensions.Configuration.Json;
using Microsoft.Extensions.Configuration;
using Tiger.IBusiness;
using System.Reflection;
using System.IO;
using System;
using Rhea.Common;
using System.Text.RegularExpressions;
using System.Linq;
using System.Collections.Generic;

namespace Tiger.Api
{
    /// <summary>
    /// AutoFac容器类
    /// </summary>
    public static class AutoFacContainer
    {
        /// <summary>
        /// 容器
        /// </summary>
        public static IContainer Instance;

        /// <summary>
        /// 初始化容器
        /// </summary>
        /// <returns></returns>
        public static void Init(ContainerBuilder builder)
        {
            //新建容器构建器，用于注册组件和服务
            Build(builder);
        }

        /// <summary>
        /// AutoFac 配置文件注入
        /// </summary>
        /// <param name="builder"></param>
        public static void Build(ContainerBuilder builder)
        {
            ////注入Tiger.Business.dll
            //var assembly = Assembly.LoadFrom(AppDomain.CurrentDomain.BaseDirectory + "Tiger.Business.dll");
            //builder.RegisterAssemblyTypes(assembly).AsImplementedInterfaces();

            #region 动态加载多个dll
            string[] assemblyPattern = new[] { "Tiger.Business([.].*)*.dll" };

            // 1. Scan for assemblies containing autofac modules in the bin folder
            List<Assembly> assemblies = new List<Assembly>();
            assemblies.AddRange(
                Directory.EnumerateFiles(AppDomain.CurrentDomain.BaseDirectory, "*.dll", SearchOption.AllDirectories)
                              .Where(filename => assemblyPattern.Any(pattern => Regex.IsMatch(filename, pattern)))
                              .Select(Assembly.LoadFrom)
            );

            foreach (var assembly in assemblies)
            {
                builder.RegisterAssemblyTypes(assembly).AsImplementedInterfaces();
            }
            #endregion

            //读取配置文件,把配置关系装载到ContainerBuilder
            var rootPath = new DirectoryInfo($"{AppDomain.CurrentDomain.BaseDirectory}Autofac");
            if (rootPath.Exists)
            {
                var files = rootPath.GetFiles("*.json", SearchOption.AllDirectories);
                foreach (var file in files)
                {
                    IConfigurationBuilder config = new ConfigurationBuilder();
                    IConfigurationSource autofacJsonConfigSource = new JsonConfigurationSource()
                    {
                        Path = file.FullName.Replace(AppDomain.CurrentDomain.BaseDirectory, ""),
                        Optional = false,//boolean,默认就是false,可不写
                        ReloadOnChange = true,//同上
                    };
                    config.Add(autofacJsonConfigSource);
                    ConfigurationModule module = new ConfigurationModule(config.Build());
                    builder.RegisterModule(module);
                }
            }

            //builder.RegisterType<TestService>().As<ITest>().InstancePerLifetimeScope(); 

            //利用构建器创建容器
            //Instance = builder.Build();
        }
    }

    /// <summary>
    /// DI公用方法
    /// </summary>
    public static class DI
    {
        public static T Resolve<T>() where T : notnull
        {
            return AutoFacContainer.Instance.Resolve<T>();
        }
    }
}