using System.Diagnostics;

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.TestHost;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

using Xunit;
using Xunit.DependencyInjection;
using Xunit.DependencyInjection.AspNetCoreTesting;
using Xunit.DependencyInjection.Logging;

namespace HttpClientStudy.UnitTest
{
    /// <summary>
    /// 依赖注入 框架必备设置类
    /// </summary>
    public class Startup
    {
        /// <summary>
        /// 创建主机：可选，一般不用
        /// </summary>
        /// <returns></returns>
        public IHostBuilder CreateHostBuilder()
        {
            return Host.CreateDefaultBuilder() ;
        }

        /// <summary>
        /// 配置主机：可选
        /// </summary>
        /// <param name="hostBuilder"></param>
        public void ConfigureHost(IHostBuilder hostBuilder)
        {
            hostBuilder
                //主机配置
                .ConfigureHostConfiguration(builder => 
                {

                })
                //应用配置
                .ConfigureAppConfiguration((context, builder) => 
                { 
                
                });

            hostBuilder.ConfigureWebHost(webHostBuilder =>
            {
                webHostBuilder
                    .UseTestServer(options => options.PreserveExecutionContext = true)
                    .ConfigureTestServices(a => { })
                    .UseStartup<WebApiStartup>();

                //配置默认配置项
                //webHostBuilder.ConfigureAppConfiguration((context, configBuilder) =>
                //{
                //    configBuilder.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
                //    configBuilder.AddJsonFile($"appsettings.{context.HostingEnvironment.EnvironmentName}.json", optional: true, reloadOnChange: true);
                //});

                //webHostBuilder.ConfigureServices(services => 
                //{
                //    services.AddHealthChecks(); 
                //});
            });
        }

        /// <summary>
        /// 注册服务：必须
        /// </summary>
        /// <param name="services"></param>
        public void ConfigureServices(IServiceCollection services,HostBuilderContext context)
        {
            Debugger.Log(1,"DI","ConfigureServices");
        }

        private class WebApiStartup
        {
            public void ConfigureServices(IServiceCollection services) => services.AddLogging(lb => lb.AddXunitOutput());

            public void Configure(IApplicationBuilder app)
            { 
                app.Run(static context => context.Response.WriteAsync("xxxxxx"));
            }  
        }
    }
}