using Tiobon.Core.Common;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.OpenApi.Models;
using Serilog;
using Swashbuckle.AspNetCore.Filters;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using static Tiobon.Core.Extensions.CustomApiVersion;
using Microsoft.AspNetCore.Builder;
using Swashbuckle.AspNetCore.SwaggerUI;
using Microsoft.Extensions.Options;

namespace Tiobon.Core.Extensions
{
    /// <summary>
    /// Swagger 启动服务
    /// </summary>
    public static class SwaggerSetup
    {
        public static void AddSwaggerSetup(this IServiceCollection services)
        {
            if (services == null) throw new ArgumentNullException(nameof(services));

            var basePath = AppContext.BaseDirectory;

            services.AddSwaggerGen(c =>
            {
                ApiInfos.ForEach(x =>
                {
                    c.SwaggerDoc(x.UrlPrefix, x.OpenApiInfo);
                    c.OrderActionsBy(o => o.RelativePath);
                });
                c.UseInlineDefinitionsForEnums();
                // 开启加权小锁
                c.OperationFilter<AddResponseHeadersFilter>();
                c.OperationFilter<AppendAuthorizeToSummaryOperationFilter>();

                // 在header中添加token，传递到后台
                c.OperationFilter<SecurityRequirementsOperationFilter>();

                // API注释所需XML文件
                try
                {

                    c.IncludeXmlComments(Path.Combine(basePath, "Tiobon.Core.xml"), true);
                    c.IncludeXmlComments(Path.Combine(basePath, "Tiobon.Core.Model.xml"), true);
                }
                catch (Exception ex)
                {
                    Log.Error("Tiobon.Core.xml和Tiobon.Core.Model.xml 丢失，请检查并拷贝。\n" + ex.Message);
                }

                c.MapType<QueryFilter>(() => new OpenApiSchema { Type = "string", Format = "string" });


                // ids4和jwt切换
                if (Permissions.IsUseIds4)
                {
                    //接入identityserver4
                    c.AddSecurityDefinition("oauth2", new OpenApiSecurityScheme
                    {
                        Type = SecuritySchemeType.OAuth2,
                        Flows = new OpenApiOAuthFlows
                        {
                            Implicit = new OpenApiOAuthFlow
                            {
                                AuthorizationUrl = new Uri($"{AppSettings.app(new string[] { "Startup", "IdentityServer4", "AuthorizationUrl" })}/connect/authorize"),
                                Scopes = new Dictionary<string, string>
                                {
                                    {
                                        "Tiobon.core.api", "ApiResource id"
                                    }
                                }
                            }
                        }
                    });
                }
                else
                {
                    c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
                    {
                        Name = "Authorization",
                        Type = SecuritySchemeType.ApiKey,
                        BearerFormat = "JWT",
                        In = ParameterLocation.Header,
                        Scheme = "Bearer",
                        Description = "JWT授权(数据将在请求头中进行传输) 直接在下框中输入Bearer {token}（注意两者之间是一个空格）\"",

                    });
                }

                c.AddSecurityRequirement(new OpenApiSecurityRequirement
                {
                    {
                        new OpenApiSecurityScheme
                        {
                            Reference = new OpenApiReference
                            {
                                Type = ReferenceType.SecurityScheme,
                                Id = "Bearer"
                            }
                        },
                        new List<string>()
                    }
                });

            });
            services.AddSwaggerGenNewtonsoftSupport();
        }

        public static void UseSwaggerMiddle(this IApplicationBuilder app, Func<Stream> streamHtml)
        {
            if (app == null) throw new ArgumentNullException(nameof(app));

            SwaggerBuilderExtensions.UseSwagger(app);
            app.UseSwaggerUI(options =>
            {
                // 遍历分组信息，生成Json
                ApiInfos.ForEach(x =>
                {
                    options.SwaggerEndpoint($"/swagger/{x.UrlPrefix}/swagger.json", x.Name);
                });
                // 模型的默认扩展深度，设置为 -1 完全隐藏模型
                options.DefaultModelsExpandDepth(-1);
                // API文档仅展开标记
                options.DocExpansion(DocExpansion.List);
                // API前缀设置为空
                options.RoutePrefix = string.Empty;
                // API页面Title
                options.DocumentTitle = "接口文档";
                if (streamHtml.Invoke() == null)
                {
                    var msg = "index.html的属性，必须设置为嵌入的资源";
                    Log.Error(msg);
                    throw new Exception(msg);
                }

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

                if (Permissions.IsUseIds4)
                {
                    options.OAuthClientId("Tiobonadminjs");
                }

                //增加令牌本地缓存 reload不会丢失
                options.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";
                options.RoutePrefix = "";
            });
        }


        /// <summary>
        /// 当前API版本
        /// </summary>
        private static readonly string version = $"V1.0";
        /// <summary>
        /// Swagger分组信息，将进行遍历使用
        /// </summary>
        private static readonly List<SwaggerApiInfo> ApiInfos = new List<SwaggerApiInfo>()
        {
            new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_Auth,
                Name = "认证授权",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "认证授权",
                    Description = "登录/注销",
                }
            },
            new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_System,
                Name = "系统模块",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "系统模块",
                    Description = "用户/角色/权限...",
                }
            },
            new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_Assistant,
                Name = "工具模块",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "工具模块",
                    Description = "自助测量程序/中央站...",
                }
            },
            new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_Other,
                Name = "其他模块",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "其他模块",
                    Description = "其他...",
                }
            }, new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_Ghre,
                Name = "培训模块",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "培训模块",
                    Description = "培训模块..."
                }
            },
            new SwaggerApiInfo
            {
                UrlPrefix = Grouping.GroupName_Ghra,
                Name = "Ghra模块",
                OpenApiInfo = new OpenApiInfo
                {
                    Version = version,
                    Title = "Ghra模块",
                    Description = "Ghra...",
                }
            }
        };
        private class SwaggerApiInfo
        {
            /// <summary>
            /// URL前缀
            /// </summary>
            public string UrlPrefix { get; set; }

            /// <summary>
            /// 名称
            /// </summary>
            public string Name { get; set; }

            /// <summary>
            /// OpenApiInfo
            /// </summary>
            public OpenApiInfo OpenApiInfo { get; set; }
        }

        /// <summary>
        /// swagger分组
        /// </summary>
        public static class Grouping
        {
            /// <summary>
            /// 系统
            /// </summary>
            public const string GroupName_System = "system";
            /// <summary>
            /// 系统
            /// </summary>
            public const string GroupName_Ghrs = "system";

            /// <summary>
            /// 认证授权
            /// </summary>
            public const string GroupName_Auth = "auth";
            /// <summary>
            /// 其他
            /// </summary>
            public const string GroupName_Other = "other";

            /// <summary>
            /// Ghra
            /// </summary>
            public const string GroupName_Ghra = "ghra";

            /// <summary>
            /// ghro
            /// </summary>
            public const string GroupName_Ghro = "ghro";
            /// <summary>
            /// 辅助工具
            /// </summary>
            public const string GroupName_Assistant = "assistant";
            /// <summary>
            /// 培训模块
            /// </summary>
            public const string GroupName_Ghre = " ghre";
        }
    }

    /// <summary>
    /// 自定义版本
    /// </summary>
    public class CustomApiVersion
    {
        /// <summary>
        /// Api接口版本 自定义
        /// </summary>
        public enum ApiVersions
        {
            /// <summary>
            /// Ghra 版本
            /// </summary>
            Ghra = 0,
            /// <summary>
            /// V1 版本
            /// </summary>
            V1 = 1,

            /// <summary>
            /// V2 版本
            /// </summary>
            V2 = 2,
        }
    }
}