using CloudBuilder.Core.Application.Builders;
using CloudBuilder.Core.Application.Packs;
using CloudBuilder.Core.DatabaseAccessor.Entity;
using CloudBuilder.Core.DatabaseAccessor;
using CloudBuilder.Core.DependencyInjection.EFCore;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection.Extensions;
using CloudBuilder.Core.Service;
using CloudBuilder.Core.Extensions;

namespace CloudBuilder.Core.DependencyInjection.EventBuses
{
    [PackLevel(30)]
    public class EventBusesPack : CloudBuilderPack
    {
        
        /// <summary>
        /// 获取 模块级别
        /// </summary>
        public override PackLevel Level => PackLevel.Business;

        /// <summary>
        /// 获取 模块启动顺序，模块启动的顺序先按级别启动，级别内部再按此顺序启动
        /// </summary>
        public override int Order => 3;

        /// <summary>
        /// 将事件总线的发布者和监听者都添加到依赖注入容器中
        /// </summary>
        /// <param name="services">依赖注入服务容器</param>
        /// <returns></returns>
        public override IServiceCollection AddServices(IServiceCollection services, CloudBuilderBuilder builder)
        {
            var baseType = typeof(IEventPublisher);

            var allAssemblies = CloudBuilderBuilder.GetAssemblies();

            var types = allAssemblies
                .SelectMany(a => a.DefinedTypes)
                .Select(type => type.AsType())
                .Where(type => type != baseType && type.HasImplementedRawGeneric(baseType))
                .Where(x => x.IsClass).ToList();


            foreach (var implementType in types)
            {
                services.AddScoped(implementType.GetInterfaces().FirstOrDefault(), implementType);
            }

            baseType = typeof(IEventSubscriber);

            types = allAssemblies
               .SelectMany(a => a.DefinedTypes)
               .Select(type => type.AsType())
               .Where(type => type != baseType && type.HasImplementedRawGeneric(baseType))
               .Where(x => x.IsClass).ToList();


            foreach (var implementType in types)
            {
                services.AddScoped(implementType.GetInterfaces().FirstOrDefault(), implementType);
            }
            /*
             * 取出所有监听服务
             IEnumerable<ISecurityUserRegisterSubscriber> subscribers = service.ServiceProvider.GetServices<ISecurityUserRegisterSubscriber>(); 
             */
            return services;
        }


    }
}