using EntrustSettle.Common;
using Microsoft.AspNetCore.Builder;
using NLog;
using Swashbuckle.AspNetCore.SwaggerUI;
using System;
using System.IO;

namespace EntrustSettle.Extensions.Middlewares
{
    /// <summary>
    /// Swagger中间件
    /// </summary>
    public static class SwaggerMiddleware
    {
        public static void UseSwaggerMiddle(this IApplicationBuilder app, Func<Stream> streamHtml)
        {
            if (app == null) throw new ArgumentNullException(nameof(app));

            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                SwaggerSetup.ApiInfos.ForEach(x =>
                {
                    c.SwaggerEndpoint($"/swagger/{x.UrlPrefix}/swagger.json", x.Name);
                });

                // 将swagger首页，设置成我们自定义的页面，记得这个字符串的写法：{项目名.swagger_index.html}
                if (streamHtml.Invoke() == null)
                {
                    var msg = "swagger_index.html的属性，必须设置为嵌入的资源";
                    LogManager.GetCurrentClassLogger().Error(msg);
                    throw new Exception(msg);
                }

                c.IndexStream = streamHtml;
                c.DocExpansion(DocExpansion.None); //->界面打开时自动折叠

                if (Permissions.IsUseIds4)
                {
                    c.OAuthClientId("blogadminjs");
                }

                //增加令牌本地缓存 reload不会丢失
                c.ConfigObject.AdditionalItems.Add("persistAuthorization", "true");

                // 路径配置，设置为空，表示直接在根域名（localhost:8001）访问该文件,注意localhost:8001/swagger是访问不到的，去launchSettings.json把launchUrl去掉，如果你想换一个路径，直接写名字即可，比如直接写c.RoutePrefix = "doc";
                c.RoutePrefix = "";
            });
        }
    }
}