// ------------------------------------------------------------------------
// 版权信息
// 版权归百小僧及百签科技（广东）有限公司所有。
// 所有权利保留。
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//
// 许可证信息
// 项目主要遵循 MIT 许可证和 Apache 许可证（版本 2.0）进行分发和使用。
// 许可证的完整文本可以在源代码树根目录中的 LICENSE-APACHE 和 LICENSE-MIT 文件中找到。
// ------------------------------------------------------------------------

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

using Swashbuckle.AspNetCore.Swagger;
using Swashbuckle.AspNetCore.SwaggerGen;
using Swashbuckle.AspNetCore.SwaggerUI;

using System.Collections.Concurrent;
using System.Reflection;
using System.Text;
using System.Text.Json.Nodes;
using System.Text.RegularExpressions;
using System.Xml.Linq;
using System.Xml.XPath;

using ThingsGateway.DynamicApiController;
using ThingsGateway.Extensions;
using ThingsGateway.Reflection;

namespace ThingsGateway.SpecificationDocument;

/// <summary>
/// 规范化文档构建器
/// </summary>
[SuppressSniffer]
public static class SpecificationDocumentBuilder
{
    /// <summary>
    /// 所有分组默认的组名 Key
    /// </summary>
    private const string AllGroupsKey = "All Groups";

    /// <summary>
    /// 规范化文档配置
    /// </summary>
    private static readonly SpecificationDocumentSettingsOptions _specificationDocumentSettings;

    /// <summary>
    /// 应用全局配置
    /// </summary>
    private static readonly AppSettingsOptions _appSettings;

    /// <summary>
    /// 分组信息
    /// </summary>
    private static readonly IEnumerable<GroupExtraInfo> DocumentGroupExtras;

    /// <summary>
    /// 带排序的分组名
    /// </summary>
    private static readonly Regex _groupOrderRegex;

    /// <summary>
    /// 文档分组列表
    /// </summary>
    public static readonly IEnumerable<string> DocumentGroups;

    /// <summary>
    /// 构造函数
    /// </summary>
    static SpecificationDocumentBuilder()
    {
        // 载入配置
        _specificationDocumentSettings = App.GetConfig<SpecificationDocumentSettingsOptions>("SpecificationDocumentSettings", true);
        _appSettings = App.Settings;

        // 初始化常量
        _groupOrderRegex = new Regex(@"@(?<order>[0-9]+$)");
        GetActionGroupsCached = new ConcurrentDictionary<MethodInfo, IEnumerable<GroupExtraInfo>>();
        GetControllerGroupsCached = new ConcurrentDictionary<Type, IEnumerable<GroupExtraInfo>>();
        GetGroupOpenApiInfoCached = new ConcurrentDictionary<string, SpecificationOpenApiInfo>();
        GetControllerTagCached = new ConcurrentDictionary<ControllerActionDescriptor, string>();
        GetActionTagCached = new ConcurrentDictionary<ApiDescription, string>();

        // 默认分组，支持多个逗号分割
        DocumentGroupExtras = new List<GroupExtraInfo> { ResolveGroupExtraInfo(_specificationDocumentSettings.DefaultGroupName) };

        // 加载所有分组
        DocumentGroups = ReadGroups();
    }

    /// <summary>
    /// 检查方法是否在分组中
    /// </summary>
    /// <param name="currentGroup"></param>
    /// <param name="apiDescription"></param>
    /// <returns></returns>
    public static bool CheckApiDescriptionInCurrentGroup(string currentGroup, ApiDescription apiDescription)
    {
        if (!apiDescription.TryGetMethodInfo(out var method)) return false;

        // 处理 Mvc 和 WebAPI 混合项目路由问题
        if (typeof(Controller).IsAssignableFrom(method.DeclaringType) && apiDescription.ActionDescriptor.ActionConstraints == null)
        {
            return false;
        }

        // 处理贴有 [ApiExplorerSettings(IgnoreApi = true)] 或者 [ApiDescriptionSettings(false)] 特性的接口
        var apiExplorerSettings = method.GetFoundAttribute<ApiExplorerSettingsAttribute>(true);

        var apiDescriptionSettings = method.GetFoundAttribute<ApiDescriptionSettingsAttribute>(true);

        if (apiExplorerSettings?.IgnoreApi == true || apiDescriptionSettings?.IgnoreApi == true) return false;

        if (currentGroup == AllGroupsKey)
        {
            return true;
        }

        return GetActionGroups(method).Any(u => u.Group == currentGroup);
    }

    /// <summary>
    /// 获取所有的规范化分组信息
    /// </summary>
    /// <returns></returns>
    public static List<SpecificationOpenApiInfo> GetOpenApiGroups()
    {
        var openApiGroups = new List<SpecificationOpenApiInfo>();
        foreach (var group in DocumentGroups)
        {
            openApiGroups.Add(GetGroupOpenApiInfo(group));
        }

        return openApiGroups;
    }

    /// <summary>
    /// 获取分组信息缓存集合
    /// </summary>
    private static readonly ConcurrentDictionary<string, SpecificationOpenApiInfo> GetGroupOpenApiInfoCached;

    /// <summary>
    /// 获取分组配置信息
    /// </summary>
    /// <param name="group"></param>
    /// <returns></returns>
    public static SpecificationOpenApiInfo GetGroupOpenApiInfo(string group)
    {
        return GetGroupOpenApiInfoCached.GetOrAdd(group, Function);

        // 本地函数
        static SpecificationOpenApiInfo Function(string group)
        {
            // 替换路由模板
            var routeTemplate = _specificationDocumentSettings.RouteTemplate.Replace("{documentName}", Uri.EscapeDataString(group));
            if (!string.IsNullOrWhiteSpace(_specificationDocumentSettings.ServerDir))
            {
                routeTemplate = _specificationDocumentSettings.ServerDir + "/" + routeTemplate;
            }

            // 处理虚拟目录问题
            var template = $"{_appSettings.VirtualPath}/{routeTemplate}";

            var groupInfo = _specificationDocumentSettings.GroupOpenApiInfos.FirstOrDefault(u => u.Group == group);
            if (groupInfo != null)
            {
                groupInfo.RouteTemplate = template;
                groupInfo.Title ??= group;
            }
            else
            {
                groupInfo = new SpecificationOpenApiInfo { Group = group, RouteTemplate = template };
            }

            // 处理外部定义
            var groupKey = "[openapi:{0}]";
            if (App.Configuration.Exists(string.Format(groupKey, group)))
            {
                SetProperty<int>(group, nameof(SpecificationOpenApiInfo.Order), value => groupInfo.Order = value);
                SetProperty<bool>(group, nameof(SpecificationOpenApiInfo.Visible), value => groupInfo.Visible = value);
                SetProperty<string>(group, nameof(SpecificationOpenApiInfo.RouteTemplate), value => groupInfo.RouteTemplate = value);
                SetProperty<string>(group, nameof(SpecificationOpenApiInfo.Title), value => groupInfo.Title = value);
                SetProperty<string>(group, nameof(SpecificationOpenApiInfo.Description), value => groupInfo.Description = value);
                SetProperty<string>(group, nameof(SpecificationOpenApiInfo.Version), value => groupInfo.Version = value);
                SetProperty<Uri>(group, nameof(SpecificationOpenApiInfo.TermsOfService), value => groupInfo.TermsOfService = value);
                SetProperty<OpenApiContact>(group, nameof(SpecificationOpenApiInfo.Contact), value => groupInfo.Contact = value);
                SetProperty<OpenApiLicense>(group, nameof(SpecificationOpenApiInfo.License), value => groupInfo.License = value);
            }

            return groupInfo;
        }
    }

    /// <summary>
    /// 设置额外配置的值
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="group"></param>
    /// <param name="propertyName"></param>
    /// <param name="action"></param>
    private static void SetProperty<T>(string group, string propertyName, Action<T> action)
    {
        var propertyKey = string.Format("[openapi:{0}]:{1}", group, propertyName);
        if (App.Configuration.Exists(propertyKey))
        {
            var value = App.GetConfig<T>(propertyKey);
            action?.Invoke(value);
        }
    }

    /// <summary>
    /// 构建Swagger全局配置
    /// </summary>
    /// <param name="swaggerOptions">Swagger 全局配置</param>
    /// <param name="configure"></param>
    internal static void Build(SwaggerOptions swaggerOptions, Action<SwaggerOptions> configure = null)
    {
        // 生成V2版本
        swaggerOptions.OpenApiVersion = _specificationDocumentSettings.FormatAsV2 == true ? Microsoft.OpenApi.OpenApiSpecVersion.OpenApi2_0 : Microsoft.OpenApi.OpenApiSpecVersion.OpenApi3_0;

        // 判断是否启用 Server
        if (_specificationDocumentSettings.HideServers != true)
        {
            // 启动服务器 Servers
            swaggerOptions.PreSerializeFilters.Add((swagger, request) =>
            {
                // 默认 Server
                var servers = new List<OpenApiServer> {
                        new OpenApiServer { Url = $"{request.Scheme}://{request.Host.Value}{_appSettings.VirtualPath}",Description="Default" }
                };
                servers.AddRange(_specificationDocumentSettings.Servers);

                swagger.Servers = servers;
            });
        }

        // 配置路由模板
        swaggerOptions.RouteTemplate = _specificationDocumentSettings.RouteTemplate;

        // 自定义配置
        configure?.Invoke(swaggerOptions);
    }

    /// <summary>
    /// Swagger 生成器构建
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    /// <param name="configure">自定义配置</param>
    internal static void BuildGen(SwaggerGenOptions swaggerGenOptions, Action<SwaggerGenOptions> configure = null)
    {
        // 创建分组文档
        CreateSwaggerDocs(swaggerGenOptions);

        // 加载分组控制器和动作方法列表
        LoadGroupControllerWithActions(swaggerGenOptions);

        // 配置 Swagger OperationIds
        ConfigureOperationIds(swaggerGenOptions);

        // 配置 Swagger SchemaId
        ConfigureSchemaIds(swaggerGenOptions);

        // 配置标签
        ConfigureTagsAction(swaggerGenOptions);

        // 配置 Action 排序
        ConfigureActionSequence(swaggerGenOptions);

        if (_specificationDocumentSettings.EnableXmlComments == true)
        {
            // 加载注释描述文件
            LoadXmlComments(swaggerGenOptions);
        }

        // 配置授权
        ConfigureSecurities(swaggerGenOptions);

        //使得 Swagger 能够正确地显示 Enum 的对应关系
        if (_specificationDocumentSettings.EnableEnumSchemaFilter == true) swaggerGenOptions.SchemaFilter<EnumSchemaFilter>();

        // 修复 editor.swagger.io 生成不能正常处理 C# object 类型问题
        swaggerGenOptions.SchemaFilter<AnySchemaFilter>();

        // 添加 Action 操作过滤器
        swaggerGenOptions.OperationFilter<ApiActionFilter>();

        // 自定义配置
        configure?.Invoke(swaggerGenOptions);

        // 支持控制器排序操作
        if (_specificationDocumentSettings.EnableTagsOrderDocumentFilter == true) swaggerGenOptions.DocumentFilter<TagsOrderDocumentFilter>();
    }

    /// <summary>
    /// Swagger UI 构建
    /// </summary>
    /// <param name="swaggerUIOptions"></param>
    /// <param name="routePrefix"></param>
    /// <param name="configure"></param>
    /// <param name="withProxy">解决 Swagger 被代理问题</param>
    internal static void BuildUI(SwaggerUIOptions swaggerUIOptions, string routePrefix = default, Action<SwaggerUIOptions> configure = null, bool withProxy = false)
    {
        // 配置分组终点路由
        CreateGroupEndpoint(swaggerUIOptions, routePrefix, withProxy);

        // 配置文档标题
        swaggerUIOptions.DocumentTitle = _specificationDocumentSettings.DocumentTitle;

        // 配置UI地址（处理二级虚拟目录）
        swaggerUIOptions.RoutePrefix = _specificationDocumentSettings.RoutePrefix ?? routePrefix ?? "api";

        // 文档展开设置
        swaggerUIOptions.DocExpansion(_specificationDocumentSettings.DocExpansionState.Value);

        // 自定义 Swagger 首页
        CustomizeIndex(swaggerUIOptions);

        // 配置多语言和自动登录token
        AddDefaultInterceptor(swaggerUIOptions);

        // 自定义配置
        configure?.Invoke(swaggerUIOptions);
    }

    /// <summary>
    /// 创建分组文档
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger生成器对象</param>
    private static void CreateSwaggerDocs(SwaggerGenOptions swaggerGenOptions)
    {
        foreach (var group in DocumentGroups)
        {
            if (swaggerGenOptions.SwaggerGeneratorOptions.SwaggerDocs.ContainsKey(group)) continue;

            var groupOpenApiInfo = GetGroupOpenApiInfo(group) as OpenApiInfo;
            swaggerGenOptions.SwaggerDoc(group, groupOpenApiInfo);
        }
    }

    /// <summary>
    /// 加载分组控制器和动作方法列表
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    private static void LoadGroupControllerWithActions(SwaggerGenOptions swaggerGenOptions)
    {
        swaggerGenOptions.DocInclusionPredicate(CheckApiDescriptionInCurrentGroup);
    }

    /// <summary>
    ///  配置标签
    /// </summary>
    /// <param name="swaggerGenOptions"></param>
    private static void ConfigureTagsAction(SwaggerGenOptions swaggerGenOptions)
    {
        swaggerGenOptions.TagActionsBy(apiDescription =>
        {
            return new[] { GetActionTag(apiDescription) };
        });
    }

    /// <summary>
    ///  配置 Action 排序
    /// </summary>
    /// <param name="swaggerGenOptions"></param>
    private static void ConfigureActionSequence(SwaggerGenOptions swaggerGenOptions)
    {
        swaggerGenOptions.OrderActionsBy(apiDesc =>
        {
            var apiDescriptionSettings = apiDesc.CustomAttributes()
                                   .FirstOrDefault(u => u.GetType() == typeof(ApiDescriptionSettingsAttribute))
                                   as ApiDescriptionSettingsAttribute ?? new ApiDescriptionSettingsAttribute();

            return (int.MaxValue - apiDescriptionSettings.Order).ToString()
                            .PadLeft(int.MaxValue.ToString().Length, '0');
        });
    }

    /// <summary>
    /// 配置 Swagger OperationIds
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    private static void ConfigureOperationIds(SwaggerGenOptions swaggerGenOptions)
    {
        swaggerGenOptions.CustomOperationIds(apiDescription =>
        {
            var isMethod = apiDescription.TryGetMethodInfo(out var method);

            // 判断是否自定义了 [OperationId] 特性
            if (isMethod && method.IsDefined(typeof(OperationIdAttribute), false))
            {
                return method.GetCustomAttribute<OperationIdAttribute>(false).OperationId;
            }

            var operationId = apiDescription.RelativePath.Replace("/", "-")
                                       .Replace("{", "-")
                                       .Replace("}", "-") + "-" + apiDescription.HttpMethod.ToLower().ToUpperCamelCase();

            return operationId.Replace("--", "-");
        });
    }

    /// <summary>
    /// 配置 Swagger SchemaIds
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    private static void ConfigureSchemaIds(SwaggerGenOptions swaggerGenOptions)
    {
        // 本地函数
        static string DefaultSchemaIdSelector(Type modelType)
        {
            var modelName = modelType.Name;

            // 处理泛型类型问题
            if (modelType.IsConstructedGenericType)
            {
                var prefix = modelType.GetGenericArguments()
                    .Select(genericArg => DefaultSchemaIdSelector(genericArg))
                    .Aggregate((previous, current) => previous + current);

                // 通过 _ 拼接多个泛型
                modelName = modelName.Split('`').First() + "_" + prefix;
            }

            // 判断是否自定义了 [SchemaId] 特性，解决模块化多个程序集命名冲突
            var isCustomize = modelType.IsDefined(typeof(SchemaIdAttribute));
            if (isCustomize)
            {
                var schemaIdAttribute = modelType.GetCustomAttribute<SchemaIdAttribute>();
                if (!schemaIdAttribute.Replace) return schemaIdAttribute.SchemaId + modelName;
                else return schemaIdAttribute.SchemaId;
            }

            return modelName;
        }

        // 调用本地函数
        swaggerGenOptions.CustomSchemaIds(modelType => DefaultSchemaIdSelector(modelType));
    }

    /// <summary>
    /// 加载注释描述文件
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    private static void LoadXmlComments(SwaggerGenOptions swaggerGenOptions)
    {
        var xmlComments = _specificationDocumentSettings.XmlComments ?? Array.Empty<string>();
        var members = new Dictionary<string, XElement>();

        // 显式继承的注释
        var regex = new Regex(@"[A-Z]:[a-zA-Z0-9_@\.]+");
        // 隐式继承的注释
        var regex2 = new Regex(@"[A-Z]:[a-zA-Z0-9_@\.]+\.");

        // 支持注释完整特性，包括 inheritdoc 注释语法
        foreach (var xmlComment in xmlComments)
        {
            var assemblyXmlName = xmlComment.EndsWith(".xml") ? xmlComment : $"{xmlComment}.xml";
            var assemblyXmlPath = Path.Combine(AppContext.BaseDirectory, assemblyXmlName);

            if (File.Exists(assemblyXmlPath))
            {
                var xmlDoc = XDocument.Load(assemblyXmlPath);

                // 查找所有 member[name] 节点，且不包含 <inheritdoc /> 节点的注释
                var memberNotInheritdocElementList = xmlDoc.XPathSelectElements("/doc/members/member[@name and not(inheritdoc)]");

                foreach (var memberElement in memberNotInheritdocElementList)
                {
                    members.TryAdd(memberElement.Attribute("name").Value, memberElement);
                }

                // 查找所有 member[name] 含有 <inheritdoc /> 节点的注释
                var memberElementList = xmlDoc.XPathSelectElements("/doc/members/member[inheritdoc]");
                foreach (var memberElement in memberElementList)
                {
                    var inheritdocElement = memberElement.Element("inheritdoc");
                    var cref = inheritdocElement.Attribute("cref");
                    var value = cref?.Value;

                    // 处理不带 cref 的 inheritdoc 注释
                    if (value == null)
                    {
                        var memberName = inheritdocElement.Parent.Attribute("name").Value;

                        // 处理隐式实现接口的注释
                        // 注释格式：M:ThingsGateway.Application.TestInheritdoc.Furion#Application#ITestInheritdoc#Abc(System.String)
                        // 匹配格式：[A-Z]:[a-zA-Z0-9_@\.]+\.
                        // 处理逻辑：直接替换匹配为空，然后讲 # 替换为 . 查找即可
                        if (memberName.Contains('#'))
                        {
                            value = $"{memberName[..2]}{regex2.Replace(memberName, "").Replace('#', '.')}";
                        }
                        // 处理带参数的注释
                        // 注释格式：M:ThingsGateway.Application.TestInheritdoc.WithParams(System.String)
                        // 匹配格式：[A-Z]:[a-zA-Z0-9_@\.]+
                        // 处理逻辑：匹配出不带参数的部分，然后获取类型命名空间，最后调用 GenerateInheritdocCref 进行生成
                        else if (memberName.Contains('('))
                        {
                            var noParamsClassName = regex.Match(memberName).Value;
                            var className = noParamsClassName[noParamsClassName.IndexOf(':')..noParamsClassName.LastIndexOf(':')];
                            value = GenerateInheritdocCref(xmlDoc, memberName, className);
                        }
                        // 处理不带参数的注释
                        // 注释格式：M:ThingsGateway.Application.TestInheritdoc.WithParams
                        // 匹配格式：无
                        // 处理逻辑：获取类型命名空间，最后调用 GenerateInheritdocCref 进行生成
                        else
                        {

                            try
                            {
                                var className = memberName[memberName.IndexOf(':')..memberName.LastIndexOf(':')];
                                value = GenerateInheritdocCref(xmlDoc, memberName, className);
                            }
                            catch (Exception ex)
                            {
                                throw new Exception($"namespace {memberName} parsing doc warn", ex);
                            }
                        }
                    }

                    if (string.IsNullOrWhiteSpace(value)) continue;

                    // 处理带 cref 的 inheritdoc 注释
                    if (members.TryGetValue(value, out var realDocMember))
                    {
                        memberElement.SetAttributeValue("_ref_", value);
                        inheritdocElement.Parent.ReplaceNodes(realDocMember.Nodes());
                    }
                }

                swaggerGenOptions.IncludeXmlComments(() => new XPathDocument(xmlDoc.CreateReader()), true);
            }
        }
    }

    /// <summary>
    /// 生成 Inheritdoc cref 属性
    /// </summary>
    /// <param name="xmlDoc"></param>
    /// <param name="memberName"></param>
    /// <param name="className"></param>
    /// <returns></returns>
    private static string GenerateInheritdocCref(XDocument xmlDoc, string memberName, string className)
    {
        var classElement = xmlDoc.XPathSelectElements($"/doc/members/member[@name='{"T" + className}' and @_ref_]").FirstOrDefault();
        if (classElement == null) return default;

        var _ref_value = classElement.Attribute("_ref_")?.Value;
        if (_ref_value == null) return default;

        var classCrefValue = _ref_value[_ref_value.IndexOf(':')..];
        return memberName.Replace(className, classCrefValue);
    }

    /// <summary>
    /// 配置授权
    /// </summary>
    /// <param name="swaggerGenOptions">Swagger 生成器配置</param>
    private static void ConfigureSecurities(SwaggerGenOptions swaggerGenOptions)
    {
        // 判断是否启用了授权
        if (_specificationDocumentSettings.EnableAuthorized != true || _specificationDocumentSettings.SecurityDefinitions.Length == 0) return;

        var openApiSecurityRequirement = new OpenApiSecurityRequirement();

        // 生成安全定义
        foreach (var securityDefinition in _specificationDocumentSettings.SecurityDefinitions)
        {
            // Id 必须定义
            if (string.IsNullOrWhiteSpace(securityDefinition.Id)
                || swaggerGenOptions.SwaggerGeneratorOptions.SecuritySchemes.ContainsKey(securityDefinition.Id)) continue;

            // 添加安全定义
            var openApiSecurityScheme = securityDefinition as OpenApiSecurityScheme;
            swaggerGenOptions.AddSecurityDefinition(securityDefinition.Id, openApiSecurityScheme);

            // 添加安全需求
            var securityRequirement = securityDefinition.Requirement;

            // C# 9.0 模式匹配新语法
            if (securityRequirement is { Scheme.Reference: not null })
            {
                securityRequirement.Scheme.Reference.Id ??= securityDefinition.Id;
                openApiSecurityRequirement.Add(securityRequirement.Scheme, securityRequirement.Accesses);
            }
        }

        // 添加安全需求
        if (openApiSecurityRequirement.Count > 0)
        {
            swaggerGenOptions.AddSecurityRequirement(openApiSecurityRequirement);
        }
    }

    /// <summary>
    /// 配置分组终点路由
    /// </summary>
    /// <param name="swaggerUIOptions"></param>
    /// <param name="routePrefix"></param>
    /// <param name="withProxy">解决 Swagger 被代理问题</param>
    private static void CreateGroupEndpoint(SwaggerUIOptions swaggerUIOptions, string routePrefix = default, bool withProxy = false)
    {
        var routePrefixArrs = (routePrefix ?? swaggerUIOptions.RoutePrefix).Split('/', StringSplitOptions.RemoveEmptyEntries);
        var routePrefixList = routePrefixArrs.Length == 0 ? routePrefixArrs.Concat(new[] { string.Empty }) : routePrefixArrs;

        foreach (var group in DocumentGroups)
        {
            var groupOpenApiInfo = GetGroupOpenApiInfo(group);

            swaggerUIOptions.SwaggerEndpoint((withProxy ? string.Join(string.Empty, routePrefixList.Select(c => "../")) : "/") + groupOpenApiInfo.RouteTemplate.TrimStart('/'), groupOpenApiInfo?.Title ?? group);
        }
    }

    /// <summary>
    /// 自定义 Swagger 首页
    /// </summary>
    /// <param name="swaggerUIOptions"></param>
    private static void CustomizeIndex(SwaggerUIOptions swaggerUIOptions)
    {
        var thisType = typeof(SpecificationDocumentBuilder);
        var thisAssembly = thisType.Assembly;

        // 判断是否启用 MiniProfile
        var customIndex = $"{Reflect.GetAssemblyName(thisAssembly)}{thisType.Namespace.Replace(nameof(ThingsGateway), string.Empty)}.Assets.{(_appSettings.InjectMiniProfiler != true ? "index" : "index-mini-profiler")}.html";
        swaggerUIOptions.IndexStream = () =>
        {
            StringBuilder htmlBuilder;
            // 自定义首页模板参数
            var indexArguments = new Dictionary<string, string>
            {
                {"%(VirtualPath)", _appSettings.VirtualPath }    // 解决二级虚拟目录 MiniProfiler 丢失问题
            };

            // 读取文件内容
            using (var stream = thisAssembly.GetManifestResourceStream(customIndex))
            {
                using var reader = new StreamReader(stream);
                htmlBuilder = new StringBuilder(reader.ReadToEnd());
            }

            // 替换模板参数
            foreach (var (template, value) in indexArguments)
            {
                htmlBuilder.Replace(template, value);
            }

            // 返回新的内存流
            var byteArray = Encoding.UTF8.GetBytes(htmlBuilder.ToString());
            return new MemoryStream(byteArray);
        };

        // 添加登录信息配置
        var additionals = _specificationDocumentSettings.LoginInfo;
        if (additionals != null)
        {
            swaggerUIOptions.ConfigObject.AdditionalItems.Add(nameof(_specificationDocumentSettings.LoginInfo), new JsonObject
            {
                [nameof(SpecificationLoginInfo.Enabled)] = additionals.Enabled || (App.HostEnvironment.IsProduction() && additionals.EnableOnProduction),
                [nameof(SpecificationLoginInfo.CheckUrl)] = additionals.CheckUrl,
                [nameof(SpecificationLoginInfo.SubmitUrl)] = additionals.SubmitUrl
            });
        }
    }

    /// <summary>
    /// 添加默认请求/响应拦截器
    /// </summary>
    /// <param name="swaggerUIOptions"></param>
    private static void AddDefaultInterceptor(SwaggerUIOptions swaggerUIOptions)
    {
        // 配置多语言和自动登录token
        swaggerUIOptions.UseRequestInterceptor("function(request) { return defaultRequestInterceptor(request); }");
        swaggerUIOptions.UseResponseInterceptor("function(response) { return defaultResponseInterceptor(response); }");
    }

    /// <summary>
    /// 读取所有分组信息
    /// </summary>
    /// <returns></returns>
    private static IEnumerable<string> ReadGroups()
    {
        // 获取所有的控制器和动作方法
        var controllers = App.EffectiveTypes.Where(u => Penetrates.IsApiController(u));
        if (!controllers.Any())
        {
            var defaultGroups = new List<string>
            {
                _specificationDocumentSettings.DefaultGroupName
            };

            // 启用总分组功能
            if (_specificationDocumentSettings.EnableAllGroups == true)
            {
                defaultGroups.Add(AllGroupsKey);
            }

            return defaultGroups;
        }

        var actions = controllers.SelectMany(c => c.GetMethods().Where(u => IsApiAction(u, c)));

        // 合并所有分组
        var groupOrders = controllers.SelectMany(u => GetControllerGroups(u))
            .Union(
                actions.SelectMany(u => GetActionGroups(u))
            )
            .Where(u => u != null && u.Visible)
            // 分组后取最大排序
            .GroupBy(u => u.Group)
            .Select(u => new GroupExtraInfo
            {
                Group = u.Key,
                Order = u.Max(x => x.Order),
                Visible = true
            });

        // 分组排序
        var groups = groupOrders
            .OrderByDescending(u => u.Order)
            .ThenBy(u => u.Group)
            .Select(u => u.Group)
            .Union(_specificationDocumentSettings.PackagesGroups);

        // 启用总分组功能
        if (_specificationDocumentSettings.EnableAllGroups == true)
        {
            groups = groups.Concat(new[] { AllGroupsKey });
        }

        return groups;
    }

    /// <summary>
    /// 获取控制器组缓存集合
    /// </summary>
    private static readonly ConcurrentDictionary<Type, IEnumerable<GroupExtraInfo>> GetControllerGroupsCached;

    /// <summary>
    /// 获取控制器分组列表
    /// </summary>
    /// <param name="type"></param>
    /// <returns></returns>
    public static IEnumerable<GroupExtraInfo> GetControllerGroups(Type type)
    {
        return GetControllerGroupsCached.GetOrAdd(type, Function);

        // 本地函数
        static IEnumerable<GroupExtraInfo> Function(Type type)
        {
            // 如果控制器没有定义 [ApiDescriptionSettings] 特性，则返回默认分组
            if (!type.IsDefined(typeof(ApiDescriptionSettingsAttribute), true)) return DocumentGroupExtras;

            // 读取分组
            var apiDescriptionSettings = type.GetCustomAttribute<ApiDescriptionSettingsAttribute>(true);
            if (apiDescriptionSettings.Groups == null || apiDescriptionSettings.Groups.Length == 0) return DocumentGroupExtras;

            // 处理分组额外信息
            var groupExtras = new List<GroupExtraInfo>();
            foreach (var group in apiDescriptionSettings.Groups)
            {
                groupExtras.Add(ResolveGroupExtraInfo(group));
            }

            return groupExtras;
        }
    }

    /// <summary>
    /// <see cref="GetActionGroups(MethodInfo)"/> 缓存集合
    /// </summary>
    private static readonly ConcurrentDictionary<MethodInfo, IEnumerable<GroupExtraInfo>> GetActionGroupsCached;

    /// <summary>
    /// 获取动作方法分组列表
    /// </summary>
    /// <param name="method">方法</param>
    /// <returns></returns>
    public static IEnumerable<GroupExtraInfo> GetActionGroups(MethodInfo method)
    {
        return GetActionGroupsCached.GetOrAdd(method, Function);

        // 本地函数
        static IEnumerable<GroupExtraInfo> Function(MethodInfo method)
        {
            // 如果动作方法没有定义 [ApiDescriptionSettings] 特性，则返回所在控制器分组
            if (!method.IsDefined(typeof(ApiDescriptionSettingsAttribute), true)) return GetControllerGroups(method.ReflectedType);

            // 读取分组
            var apiDescriptionSettings = method.GetCustomAttribute<ApiDescriptionSettingsAttribute>(true);
            if (apiDescriptionSettings.Groups == null || apiDescriptionSettings.Groups.Length == 0) return GetControllerGroups(method.ReflectedType);

            // 处理排序
            var groupExtras = new List<GroupExtraInfo>();
            foreach (var group in apiDescriptionSettings.Groups)
            {
                groupExtras.Add(ResolveGroupExtraInfo(group));
            }

            return groupExtras;
        }
    }

    /// <summary>
    /// <see cref="GetActionTag(ApiDescription)"/> 缓存集合
    /// </summary>
    private static readonly ConcurrentDictionary<ControllerActionDescriptor, string> GetControllerTagCached;

    /// <summary>
    /// 获取控制器标签
    /// </summary>
    /// <param name="controllerActionDescriptor">控制器接口描述器</param>
    /// <returns></returns>
    public static string GetControllerTag(ControllerActionDescriptor controllerActionDescriptor)
    {
        return GetControllerTagCached.GetOrAdd(controllerActionDescriptor, Function);

        // 本地函数
        static string Function(ControllerActionDescriptor controllerActionDescriptor)
        {
            var type = controllerActionDescriptor.ControllerTypeInfo;
            // 如果动作方法没有定义 [ApiDescriptionSettings] 特性，则返回所在控制器名
            if (!type.IsDefined(typeof(ApiDescriptionSettingsAttribute), true)) return controllerActionDescriptor.ControllerName;

            // 读取标签
            var apiDescriptionSettings = type.GetCustomAttribute<ApiDescriptionSettingsAttribute>(true);
            return string.IsNullOrWhiteSpace(apiDescriptionSettings.Tag) ? controllerActionDescriptor.ControllerName : apiDescriptionSettings.Tag;
        }
    }

    /// <summary>
    /// <see cref="GetActionTag(ApiDescription)"/> 缓存集合
    /// </summary>
    private static readonly ConcurrentDictionary<ApiDescription, string> GetActionTagCached;

    /// <summary>
    /// 获取动作方法标签
    /// </summary>
    /// <param name="apiDescription">接口描述器</param>
    /// <returns></returns>
    public static string GetActionTag(ApiDescription apiDescription)
    {
        return GetActionTagCached.GetOrAdd(apiDescription, Function);

        // 本地函数
        static string Function(ApiDescription apiDescription)
        {
            if (!apiDescription.TryGetMethodInfo(out var method)
                || apiDescription.ActionDescriptor is not ControllerActionDescriptor controllerActionDescriptor) return Assembly.GetEntryAssembly().GetName().Name;

            // 如果动作方法没有定义 [ApiDescriptionSettings] 特性，则返回所在控制器名
            if (!method.IsDefined(typeof(ApiDescriptionSettingsAttribute), true)) return GetControllerTag(controllerActionDescriptor);

            // 读取标签
            var apiDescriptionSettings = method.GetCustomAttribute<ApiDescriptionSettingsAttribute>(true);
            return string.IsNullOrWhiteSpace(apiDescriptionSettings.Tag) ? GetControllerTag(controllerActionDescriptor) : apiDescriptionSettings.Tag;
        }
    }

    /// <summary>
    /// 是否是动作方法
    /// </summary>
    /// <param name="method">方法</param>
    /// <param name="ReflectedType">声明类型</param>
    /// <returns></returns>
    public static bool IsApiAction(MethodInfo method, Type ReflectedType)
    {
        // 不是非公开、抽象、静态、泛型方法
        if (!method.IsPublic || method.IsAbstract || method.IsStatic || method.IsGenericMethod) return false;

        // 如果所在类型不是控制器，则该行为也被忽略
        if (method.ReflectedType != ReflectedType || method.DeclaringType == typeof(object)) return false;

        return true;
    }

    /// <summary>
    /// 解析分组附加信息
    /// </summary>
    /// <param name="group">分组名</param>
    /// <returns></returns>
    private static GroupExtraInfo ResolveGroupExtraInfo(string group)
    {
        string realGroup;
        var order = 0;

        if (!_groupOrderRegex.IsMatch(group)) realGroup = group;
        else
        {
            realGroup = _groupOrderRegex.Replace(group, "");
            order = int.Parse(_groupOrderRegex.Match(group).Groups["order"].Value);
        }

        var groupOpenApiInfo = GetGroupOpenApiInfo(realGroup);
        return new GroupExtraInfo
        {
            Group = realGroup,
            Order = groupOpenApiInfo.Order ?? order,
            Visible = groupOpenApiInfo.Visible ?? true
        };
    }
}
