using Autofac.Core;
using Autofac.Extensions.DependencyInjection;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WIDESEA_Core.Helper;

namespace WIDESEA_Core.Middlewares
{
    /// <summary>
    /// 查看所有注入的服务
    /// </summary>
    public static class AllServicesMiddleware
    {
        /// <summary>
        /// 注册一个中间件，用于显示所有已注册的服务信息
        /// </summary>
        /// <param name="app">应用程序构建器</param>
        /// <param name="_services">服务集合</param>
        /// <remarks>
        /// 该中间件会在"/allservices"路径下生成一个HTML表格，
        /// 展示所有注册的服务类型、生命周期和实现类型信息，
        /// 包括通过Autofac注册的服务
        /// </remarks>
        public static void UseAllServicesMiddle(this IApplicationBuilder app, IServiceCollection _services)
        {
            if (app == null) throw new ArgumentNullException(nameof(app));

            //List<Type> tsDIAutofac = new List<Type>();
            //tsDIAutofac.AddRange(Assembly.LoadFrom(Path.Combine(AppContext.BaseDirectory, "Blog.Core.Services.dll")).GetTypes().ToList());
            //tsDIAutofac.AddRange(Assembly.LoadFrom(Path.Combine(AppContext.BaseDirectory, "Blog.Core.Repository.dll")).GetTypes().ToList());

            IEnumerable<IComponentRegistration> autofacContainers = (app.ApplicationServices.GetAutofacRoot())?.ComponentRegistry?.Registrations ?? new List<IComponentRegistration>();


            app.Map("/allservices", builder => builder.Run(async context =>
            {
                context.Response.ContentType = "text/html; charset=utf-8";
                await context.Response.WriteAsync("<style>.table2_1 table {width:100%;margin:15px 0}.table2_1 th {background-color:#93DAFF;color:#000000}.table2_1,.table2_1 th,.table2_1 td{font-size:0.95em;text-align:center;padding:4px;border:1px solid #c1e9fe;border-collapse:collapse}.table2_1 tr:nth-child(odd){background-color:#dbf2fe;}.table2_1 tr:nth-child(even){background-color:#fdfdfd;}</style>");

                await context.Response.WriteAsync($"<h3>所有服务{_services.Count}个</h3><table class='table2_1'><thead><tr><th>类型</th><th>生命周期</th><th>Instance</th></tr></thead><tbody>");

                foreach (var svc in _services)
                {
                    await context.Response.WriteAsync("<tr>");
                    await context.Response.WriteAsync($"<td>{svc.ServiceType.FullName}</td>");
                    await context.Response.WriteAsync($"<td>{svc.Lifetime}</td>");
                    await context.Response.WriteAsync($"<td>{svc.ImplementationType?.Name}</td>");
                    await context.Response.WriteAsync("</tr>");
                }
                foreach (var item in autofacContainers?.ToList())
                {
                    var interfaceType = item.Services;
                    foreach (var typeArray in interfaceType)
                    {
                        await context.Response.WriteAsync("<tr>");
                        await context.Response.WriteAsync($"<td>{typeArray?.Description}</td>");
                        await context.Response.WriteAsync($"<td>{item?.Lifetime}</td>");
                        await context.Response.WriteAsync($"<td>{item?.Target.Activator.ObjToString().Replace("(ReflectionActivator)", "")}</td>");
                        await context.Response.WriteAsync("</tr>");
                    }
                }
                await context.Response.WriteAsync("</tbody></table>");
            }));
        }
    }
}