using System.Reflection;
using System.Text;

using Abp.Extensions;

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.OpenApi.Models;

using Swashbuckle.AspNetCore.SwaggerUI;

using VberZero.Configuration;

namespace VberAdmin.Swagger
{
    public static class SwaggerExtensions
    {
        private static string _apiVersion = "v1";

        /// <summary>
        /// 将 ABP 基础 URI 注入 index.html 页面
        /// </summary>
        /// <param name="options"></param>
        /// <param name="pathBase">base path (URL) to application API</param>
        public static void InjectBaseUrl(this SwaggerUIOptions options, string pathBase)
        {
            pathBase = pathBase.EnsureEndsWith('/');

            options.HeadContent = new StringBuilder(options.HeadContent)
                .AppendLine($"<script> var abp = abp || {{}}; abp.appPath = abp.appPath || '{pathBase}'; </script>")
                .ToString();
        }

        /// <summary>
        /// 在 Configure 方法中启用此行和相关行以启用 swagger UI
        /// </summary>
        /// <param name="services"></param>
        /// <param name="env"></param>
        public static void ConfigureSwagger(this IServiceCollection services, IWebHostEnvironment env)
        {
            var appConfiguration = env.GetAppConfiguration();
            services.AddSwaggerGen(options =>
            {
                options.SwaggerDoc(_apiVersion, new OpenApiInfo
                {
                    Version = _apiVersion,
                    Title = "VberAdmin API",
                    Description = "VberAdmin",
                    // uncomment if needed TermsOfService = new Uri("https://example.com/terms"),
                    //Contact = new OpenApiContact
                    //{
                    //    Name = "VberAdmin",
                    //    Email = string.Empty,
                    //    Url = new Uri("https://twitter.com/aspboilerplate"),
                    //},
                    //License = new OpenApiLicense
                    //{
                    //    Name = "MIT License",
                    //    Url = new Uri("https://github.com/aspnetboilerplate/aspnetboilerplate/blob/dev/LICENSE"),
                    //}
                });
                options.DocInclusionPredicate((docName, description) => true);

                // 定义正在使用的 BearerAuth 方案
                options.AddSecurityDefinition("bearerAuth", new OpenApiSecurityScheme()
                {
                    Description =
                        "使用 Bearer 方案的 JWT 授权标头。 例子: \"Authorization: Bearer {token}\"",
                    Name = "Authorization",
                    In = ParameterLocation.Header,
                    Type = SecuritySchemeType.ApiKey
                });
                options.AddSecurityRequirement(new OpenApiSecurityRequirement
                {
                    {
                        new OpenApiSecurityScheme
                        {
                            Reference = new OpenApiReference {
                                Type = ReferenceType.SecurityScheme,
                                Id = "bearerAuth"
                            }
                        },
                        new string[] { }
                    }
                });
                //添加摘要
                bool canShowSummaries = appConfiguration.GetValue<bool>("Swagger:ShowSummaries");
                if (canShowSummaries)
                {
                    var hostXmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                    var hostXmlPath = Path.Combine(env.ContentRootPath, hostXmlFile);
                    options.IncludeXmlComments(hostXmlPath);

                    var applicationXml = $"VberAdmin.Application.xml";
                    var applicationXmlPath = Path.Combine(env.ContentRootPath, applicationXml);
                    options.IncludeXmlComments(applicationXmlPath);

                    var webCoreXmlFile = $"VberAdmin.Web.Core.xml";
                    var webCoreXmlPath = Path.Combine(env.ContentRootPath, webCoreXmlFile);
                    options.IncludeXmlComments(webCoreXmlPath);
                }
                options.ParameterFilter<SwaggerEnumParameterFilter>();
                options.SchemaFilter<SwaggerEnumSchemaFilter>();
                options.OperationFilter<SwaggerOperationIdFilter>();
                options.OperationFilter<SwaggerOperationFilter>();
                options.DocumentFilter<CustomDocFilter>();
            });
        }

        public static void Use_SwaggerUI(this IApplicationBuilder app, Assembly assembly, string namespaceStr = "VberAdmin.Web.Mvc")
        {
            //启用中间件以将生成的 Swagger 作为 JSON 端点提供服务
            app.UseSwagger(c => { c.RouteTemplate = "doc/{documentName}/api.json"; });

            //  启用中间件以提供 swagger-ui 资产（HTML、JS、CSS 等）
            app.UseSwaggerUI(options =>
            {
                options.DocumentTitle = "API-系统管理平台";
                options.DocExpansion(DocExpansion.None);//设置为none可折叠所有方法
                options.DefaultModelsExpandDepth(-1); //设置为 -1 可不显示models
                options.RoutePrefix = "doc";//配置后，你的最终访问路径就就是 /doc/index.html 否则  /swagger;
                options.SwaggerEndpoint($"/doc/{_apiVersion}/api.json", $"VberAdmin API {_apiVersion}");
                options.IndexStream = () => assembly.GetManifestResourceStream($"{namespaceStr}.wwwroot.swagger.ui.index.html");
                options.DisplayRequestDuration(); // Controls the display of the request duration (in milliseconds) for "Try it out" requests.
            }); //  URL: /doc
        }
    }
}