using AspNetCoreRateLimit;
using ATS.NonCustodial.AdminUi.Attributes;
using ATS.NonCustodial.AdminUi.Auth;
using ATS.NonCustodial.AdminUi.Extensions;
using ATS.NonCustodial.AdminUi.Extensions.Host;
using ATS.NonCustodial.AdminUi.Extensions.ImSignalR;
using ATS.NonCustodial.AdminUi.Filters;
using ATS.NonCustodial.AdminUi.Helpers;
using ATS.NonCustodial.AdminUi.Helpers.Logs;
using ATS.NonCustodial.Application.Contracts.Interfaces.Business.IM.Notifies;
using ATS.NonCustodial.Application.Impl.Business.IM;
using ATS.NonCustodial.DynamicApi;
using ATS.NonCustodial.Shared.Common.Auth;
using ATS.NonCustodial.Shared.Common.Constants;
using ATS.NonCustodial.Shared.Common.Enums;
using ATS.NonCustodial.Shared.Tools.Cache;
using IdentityServer4.AccessTokenValidation;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Connections;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.DependencyModel;
using Microsoft.Extensions.Hosting;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Any;
using Microsoft.OpenApi.Models;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using Serilog;
using System.IdentityModel.Tokens.Jwt;
using System.Reflection;
using System.Text;
using ATS.NonCustodial.Shared.Helpers.Http.HttpPolly;
using Yitter.IdGenerator;
using IConfiguration = Microsoft.Extensions.Configuration.IConfiguration;

namespace ATS.NonCustodial.AdminUi.Configurations
{
    /// <summary>
    ///  Startup==> ServiceCollection 注入扩展
    /// </summary>
    /// Author:mxg
    /// CreatedTimed:2022-05-30 08:57 PM
    public static class AdminServerCollectionExtension
    {
        /// <summary>
        /// This method gets called by the runtime. Use this method to add services to the container.
        /// </summary>
        /// <param name="services"></param>
        /// <param name="adminUiOptions"></param>
        /// <param name="configuration"></param>
        /// <param name="assemblies"></param>
        public static void AddAdminServices(this IServiceCollection services, AdminUiOptions adminUiOptions, IConfiguration configuration, Assembly[] assemblies)
        {
            //雪花漂移算法
            YitIdHelper.SetIdGenerator(new IdGeneratorOptions(1) { WorkerIdBitLength = 6 });

            //权限处理
            services.AddScoped<IPermissionHandler, PermissionHandler>();
            services.AddScoped<IHttpPollyHelper, HttpPollyHelper>();

            // ClaimType不被更改
            JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();

            //用户信息
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            if (adminUiOptions.IdentityServerConfiguration.Enable) services.TryAddSingleton<IUser, UserIdentityServer>();  //is4
            else services.TryAddSingleton<IUser, User>(); //jwt

            //AutoMapper映射配置
            services.AddAutoMapper((serviceProvider, cfg) =>
            {
                // 你可以在这里进行全局性的配置
                cfg.AllowNullCollections = true; // 示例：允许空集合映射

                // 如果你需要从服务提供器（IServiceProvider）解析服务，以便在映射配置中使用，可以使用 serviceProvider 参数
                // var someService = serviceProvider.GetRequiredService<ISomeService>();
                // cfg.ConstructServicesUsing(type => serviceProvider.GetService(type)); // 另一种设置服务构造函数的方法
            }, assemblies);

            //注册job
            services.InitialQuartzJob(adminUiOptions);

            //Cors 跨域
            services.AddAdminApiCors(adminUiOptions);

            //个推
            services.AddSingleton(adminUiOptions.TweetsConfigConfiguration);

            #region 身份认证授权

            //signalR:https://docs.microsoft.com/zh-cn/aspnet/core/signalr/authn-and-authz?view=aspnetcore-6.0
            var jwtConfig = adminUiOptions.JwtConfiguration;
            services.TryAddSingleton(jwtConfig);
            if (adminUiOptions.IdentityServerConfiguration.Enable)
            {
                //is4
                services.AddAuthentication(options =>
                {
                    options.DefaultScheme = IdentityServerAuthenticationDefaults.AuthenticationScheme;
                    options.DefaultChallengeScheme = nameof(ResponseAuthenticationHandler); //401
                    options.DefaultForbidScheme = nameof(ResponseAuthenticationHandler);    //403
                })
                .AddJwtBearer(options =>
                {
                    options.Authority = adminUiOptions.IdentityServerConfiguration.Url;
                    options.RequireHttpsMetadata = false;
                    options.Audience = "ATS.NonCustodial.Admin.Api";

                    //重点在于这里；判断是SignalR的路径
                    options.Events = new JwtBearerEvents
                    {
                        OnMessageReceived = (context) =>
                        {
                            if (!context.HttpContext.Request.Path.HasValue) return Task.CompletedTask;

                            //重点在于这里；判断是SignalR的路径
                            var accessToken = context.HttpContext.Request.Query["access_token"];
                            var path = context.HttpContext.Request.Path;
                            if (string.IsNullOrWhiteSpace(accessToken) || !path.StartsWithSegments("/nonCustodialHub")) return Task.CompletedTask;

                            context.Token = accessToken;
                            return Task.CompletedTask;
                        }
                    };
                })
                .AddScheme<AuthenticationSchemeOptions, ResponseAuthenticationHandler>(nameof(ResponseAuthenticationHandler), o => { });
            }
            else
            {
                //jwt
                services.AddAuthentication(options =>
                {
                    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
                    options.DefaultChallengeScheme = nameof(ResponseAuthenticationHandler); //401
                    options.DefaultForbidScheme = nameof(ResponseAuthenticationHandler);    //403
                })
                .AddJwtBearer(options =>
                {
                    options.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateIssuer = true,
                        ValidateAudience = true,
                        ValidateLifetime = true,
                        ValidateIssuerSigningKey = true,
                        ValidIssuer = jwtConfig.Issuer,
                        ValidAudience = jwtConfig.Audience,
                        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtConfig.SymmetricSecurityKey)),
                        ClockSkew = TimeSpan.Zero
                    };

                    //重点在于这里；判断是SignalR的路径(https://www.cnblogs.com/fger/p/11811190.html)
                    options.Events = new JwtBearerEvents
                    {
                        OnMessageReceived = (context) =>
                        {
                            if (!context.HttpContext.Request.Path.HasValue) return Task.CompletedTask;

                            //重点在于这里；判断是SignalR的路径
                            var accessToken = context.HttpContext.Request.Query["access_token"];
                            var path = context.HttpContext.Request.Path;
                            if (string.IsNullOrWhiteSpace(accessToken) || !path.StartsWithSegments("/nonCustodialHub")) return Task.CompletedTask;

                            context.Token = accessToken;
                            return Task.CompletedTask;
                        },

                        //此处为权限验证失败后触发的事件
                        OnChallenge = context =>
                        {
                            //此处代码为终止.Net Core默认的返回类型和数据结果，这个很重要哦，必须
                            context.HandleResponse();
                            //自定义自己想要返回的数据结果，我这里要返回的是Json对象，通过引用Newtonsoft.Json库进行转换
                            var payload = new { StatusCode = 0, Message = "身份认证失败！" };
                            //自定义返回的数据类型
                            context.Response.ContentType = "application/json";
                            //自定义返回状态码，默认为401 我这里改成 200
                            context.Response.StatusCode = StatusCodes.Status200OK;
                            //context.Response.StatusCode = StatusCodes.Status401Unauthorized;
                            //输出Json数据结果
                            context.Response.WriteAsync(Convert.ToString(payload));
                            return Task.FromResult(0);
                        }
                    };
                })
                .AddScheme<AuthenticationSchemeOptions, ResponseAuthenticationHandler>(nameof(ResponseAuthenticationHandler), o => { });
            }

            #endregion 身份认证授权

            #region Swagger Api文档

            if (adminUiOptions.SwaggerConfiguration.Enable)
            {
                services.AddSwaggerGen(options =>
                {
                    typeof(ApiVersionEnum).GetEnumNames().ToList().ForEach(version =>
                    {
                        options.SwaggerDoc(version, new OpenApiInfo
                        {
                            Version = version,
                            Title = "ATS.NonCustodial.Admin.Api"
                        });
                        //c.OrderActionsBy(o => o.RelativePath);
                    });

                    options.SchemaFilter<EnumSchemaFilter>();

                    options.CustomOperationIds(apiDesc =>
                    {
                        var controllerAction = apiDesc.ActionDescriptor as ControllerActionDescriptor;
                        return controllerAction?.ControllerName + "-" + controllerAction?.ActionName;
                    });

                    options.ResolveConflictingActions(apiDescription => apiDescription.First());
                    options.CustomSchemaIds(x => x.FullName);
                    options.DocInclusionPredicate((docName, description) => true);

                    var xmlFiles = Directory.GetFiles(Path.Combine(AppContext.BaseDirectory, "xml"), "*.xml");
                    if (xmlFiles.Length > 0)
                    {
                        foreach (var xmlFile in xmlFiles)
                        {
                            options.IncludeXmlComments(xmlFile, true);
                        }
                    }

                    var server = new OpenApiServer()
                    {
                        Url = adminUiOptions.SwaggerConfiguration.Url,
                        Description = ""
                    };
                    server.Extensions.Add("extensions", new OpenApiObject
                    {
                        ["copyright"] = new OpenApiString(adminUiOptions.SwaggerConfiguration.Footer)
                    });

                    //options.AddServer(server);

                    #region 添加设置Token的按钮

                    if (adminUiOptions.IdentityServerConfiguration.Enable)
                    {
                        //添加Jwt验证设置
                        options.AddSecurityRequirement(new OpenApiSecurityRequirement()
                        {
                            {
                                new OpenApiSecurityScheme
                                {
                                    Reference = new OpenApiReference
                                    {
                                        Id = "oauth2",
                                        Type = ReferenceType.SecurityScheme
                                    }
                                },
                                new List<string>()
                            }
                        });

                        //统一认证
                        options.AddSecurityDefinition("oauth2", new OpenApiSecurityScheme
                        {
                            Type = SecuritySchemeType.OAuth2,
                            Description = "oauth2登录授权",
                            Flows = new OpenApiOAuthFlows
                            {
                                Implicit = new OpenApiOAuthFlow
                                {
                                    AuthorizationUrl = new Uri($"{adminUiOptions.IdentityServerConfiguration.Url}/connect/authorize"),
                                    Scopes = new Dictionary<string, string>
                                    {
                                        { "ATS.NonCustodial.Admin.Api", "ATS.NonCustodial.Admin.Api" }
                                    }
                                },
                                //AuthorizationCode = new OpenApiOAuthFlow
                                //{
                                //    AuthorizationUrl = new Uri($"{adminApiConfiguration.IdentityServerBaseUrl}/connect/authorize"),
                                //    TokenUrl = new Uri($"{adminApiConfiguration.IdentityServerBaseUrl}/connect/token"),
                                //    Scopes = new Dictionary<string, string> {
                                //    {
                                //            adminApiConfiguration.OidcApiName, adminApiConfiguration.ApiName }
                                //    }
                                //}
                            }
                        });
                        options.OperationFilter<AuthorizeCheckOperationFilter>();
                    }
                    else
                    {
                        //添加Jwt验证设置
                        options.AddSecurityRequirement(new OpenApiSecurityRequirement()
                        {
                            {
                                new OpenApiSecurityScheme
                                {
                                    Reference = new OpenApiReference
                                    {
                                        Id = "Bearer",
                                        Type = ReferenceType.SecurityScheme
                                    }
                                },
                                new List<string>()
                            }
                        });

                        options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
                        {
                            Description = "Value: Bearer {token}",
                            Name = "Authorization",
                            In = ParameterLocation.Header,
                            Type = SecuritySchemeType.ApiKey
                        });
                    }

                    #endregion 添加设置Token的按钮

                    //注册Api过滤器
                    options.DocumentFilter<ApiToSwaggerFilter>();
                });
            }

            #endregion Swagger Api文档

            //操作日志
            if (adminUiOptions.LogConfiguration.EnableOperationLog) services.AddScoped<ILogHandler, LogHandler>();

            #region 控制器

            services.AddControllers(options =>
            {
                options.Filters.Add<ControllerExceptionFilter>();
                options.Filters.Add<ValidateInputFilter>();
                options.Filters.Add<ValidatePermissionAttribute>();
                if (adminUiOptions.LogConfiguration.EnableOperationLog)
                {
                    options.Filters.Add<ControllerLogFilter>();
                }
                //禁止去除ActionAsync后缀
                //options.SuppressAsyncSuffixInActionNames = false;
            })
            //.AddFluentValidation(config =>
            //{
            //    var assembly = Assembly.LoadFrom(Path.Combine(basePath, "ATS.NonCustodial.Admin.dll"));
            //    config.RegisterValidatorsFromAssembly(assembly);
            //})
            .AddNewtonsoftJson(options =>
            {
                //忽略循环引用
                options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
                //使用驼峰 首字母小写
                options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                //设置时间格式
                options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";
            })
            .AddControllersAsServices();

            #endregion 控制器

            services.AddHttpClient();

            #region 缓存

            var cacheConfig = adminUiOptions.CacheConfiguration;
            if (cacheConfig.Type == CacheTypeEnum.Redis)
            {
                var csredis = new CSRedis.CSRedisClient(cacheConfig.Redis.ConnectionString);
                RedisHelper.Initialization(csredis);
                services.AddSingleton<ICacheTool, RedisCacheTool>();
            }
            else
            {
                services.AddMemoryCache();
                services.AddSingleton<ICacheTool, MemoryCacheTool>();
            }

            #endregion 缓存

            #region singalR

            // Change to use Name as the user identifier for SignalR
            // WARNING: This requires that the source of your JWT token
            // ensures that the Name claim is unique!
            // If the Name claim isn't unique, users could receive messages
            // intended for a different user!
            services.AddSingleton<IUserIdProvider, NameUserIdProvider>();

            //SignalR https://docs.microsoft.com/zh-cn/aspnet/core/signalr/configuration?view=aspnetcore-6.0&tabs=dotnet
            services
                .AddSignalR()
                .AddHubOptions<NonCustodialHub>(options =>
                {
                    const int keepAliveIntervalInSeconds = 60;
                    options.EnableDetailedErrors = true;
                    //客户端发保持连接请求到服务端最长间隔，默认30秒
                    options.ClientTimeoutInterval = TimeSpan.FromSeconds(2 * keepAliveIntervalInSeconds);
                    options.HandshakeTimeout = TimeSpan.FromSeconds(keepAliveIntervalInSeconds);
                    //服务端发保持连接请求到客户端间隔，默认15秒
                    options.KeepAliveInterval = TimeSpan.FromSeconds(keepAliveIntervalInSeconds);
                })
                .AddJsonProtocol(options =>
                {
                    options.PayloadSerializerOptions.PropertyNamingPolicy = null;
                });
            services.AddSingleton(typeof(IClientNotifyService), typeof(ClientNotifyService));

            #endregion singalR

            //性能分析  (https://miniprofiler.com/)
            //默认的index.html页面可以从如下链接下载
            //https://github.com/domaindrivendev/Swashbuckle.AspNetCore/blob/master/src/Swashbuckle.AspNetCore.SwaggerUI/index.html
            if (adminUiOptions.SwaggerConfiguration.EnableMiniProfiler) services.AddMiniProfiler();//AddComtorizedMiniProfiler();

            //动态api
            services.AddDynamicApi(options =>
            {
                var assemblies = DependencyContext.Default.RuntimeLibraries
                .Where(a => a.Name.EndsWith("Service"))
                .Select(o => Assembly.Load(new AssemblyName(o.Name))).ToArray();
                options.AddAssemblyOptions(assemblies);
            });
        }

        /// <summary>
        /// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        /// </summary>
        /// <param name="app"></param>
        /// <param name="env"></param>
        /// <param name="adminUiOptions"></param>
        /// <param name="indexStream"></param>
        public static void ConfigApp(IApplicationBuilder app, IWebHostEnvironment env, AdminUiOptions adminUiOptions, Stream? indexStream)
        {
            //IP限流
            if (adminUiOptions.RateLimitConfiguration.Enable) app.UseIpRateLimiting();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }

            //静态文件
            app.UseDefaultFiles();

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseUploadConfig();

            //激活中间件，启用MiniProfiler服务，放在UseEndpoints方法之前
            if (adminUiOptions.SwaggerConfiguration.EnableMiniProfiler) app.UseMiniProfiler();
            //路由
            app.UseRouting();

            //跨域
            app.UseCors(AdminConstant.requestPolicyName);

            //认证
            app.UseAuthentication();

            //授权
            app.UseAuthorization();

            //配置端点(include signalR)
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();

                //即时通讯
                endpoints.MapHub<NonCustodialHub>("/nonCustodialHub", options =>
                {
                    options.Transports =
                             HttpTransportType.WebSockets |
                             HttpTransportType.LongPolling;
                    options.LongPolling.PollTimeout = TimeSpan.FromSeconds(30);
                }).RequireCors(t =>
                    t.WithOrigins(adminUiOptions.UrlsConfiguration.CorUrls.Any()
                                ? adminUiOptions.UrlsConfiguration.CorUrls.ToArray()
                                : new string[] { })
                            .AllowAnyMethod()
                            .AllowAnyHeader()
                            .AllowCredentials()
                        );
            });

            //解决Ubuntu下Nginx代理不能获取IP问题
            app.UseForwardedHeaders(new ForwardedHeadersOptions
            {
                ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
            });

            #region Swagger Api文档

            if (!env.IsDevelopment() && !adminUiOptions.SwaggerConfiguration.Enable) return;

            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                typeof(ApiVersionEnum).GetEnumNames().OrderByDescending(e => e).ToList().ForEach(version =>
                {
                    c.SwaggerEndpoint($"/swagger/{version}/swagger.json", $"ATS.NonCustodial.Admin {version}");
                });
                c.RoutePrefix = "";//直接根目录访问，如果是IIS发布可以注释该语句，并打开launchSettings.launchUrl
                c.DocExpansion(Swashbuckle.AspNetCore.SwaggerUI.DocExpansion.None);//折叠Api

                c.OAuthClientId(adminUiOptions.AdminApiConfiguration.OidcSwaggerUIClientId);
                c.OAuthAppName(adminUiOptions.AdminApiConfiguration.ApiName);
                c.OAuthUsePkce();

                //c.DefaultModelsExpandDepth(-1);//不显示Models
                if (!adminUiOptions.SwaggerConfiguration.EnableMiniProfiler) return;
                // Gets or sets a Stream function for retrieving the swagger-ui page
                if (indexStream != null) c.IndexStream = () => indexStream;

                c.InjectJavascript("/swagger/mini-profiler.js?v=4.2.22+2.0");
                c.InjectStylesheet("/swagger/mini-profiler.css?v=4.2.22+2.0");
            });

            #endregion Swagger Api文档
        }

        /// <summary>
        /// Program==> SerialLog and Kestral
        /// </summary>
        /// <param name="args"></param>
        /// <param name="host"></param>
        /// <param name="webHost"></param>
        /// <param name="webApplicationBuilder"></param>
        /// <param name="adminUiOptions"></param>
        public static void ConfigureProgram(string[] args, IHostBuilder host, IWebHostBuilder webHost, WebApplicationBuilder webApplicationBuilder, AdminUiOptions adminUiOptions)
        {
            try
            {
                Log.Logger = new LoggerConfiguration().CreateBootstrapLogger();

                //                //configure SerialLog
                //                host.UseSerilog((hostContext, loggerConfig) =>
                //                {
                //                    loggerConfig
                //                         .ReadFrom.Configuration(hostContext.Configuration)
                //                         .Enrich.WithProperty("ApplicationName", hostContext.HostingEnvironment.ApplicationName)
                //#if DEBUG
                //                         .WriteTo.Console();
                //#endif
                //                });

                //配置Kestrel服务器
                webHost
                    .ConfigureAppConfiguration((hostContext, configApp) =>
                    {
                        var configurationRoot = configApp.Build();
                        configApp.AddJsonFile("configs/appsettings.json", optional: true, reloadOnChange: true);
                        configApp.AddJsonFile("configs/serilog.json", optional: true, reloadOnChange: true);
                        configApp.AddJsonFile("seeds/datadictionary.json", optional: true, reloadOnChange: true);
                        configApp.AddJsonFile("seeds/identitydata.json", optional: true, reloadOnChange: true);
                        configApp.AddJsonFile("seeds/swagger.json", optional: true, reloadOnChange: true);

                        var env = hostContext.HostingEnvironment;
                        configApp.AddJsonFile($"configs/appsettings.{env.EnvironmentName}.json", optional: true,
                            reloadOnChange: true);
                        configApp.AddJsonFile($"configs/serilog.{env.EnvironmentName}.json", optional: true,
                            reloadOnChange: true);
                        configApp.AddEnvironmentVariables();
                        configApp.AddCommandLine(args);
                    })
                    //https://docs.microsoft.com/zh-cn/dotnet/api/microsoft.aspnetcore.http.features.formoptions?view=aspnetcore-6.0
                    .ConfigureKestrel((context, options) =>
                    {
                        //https://docs.microsoft.com/zh-cn/dotnet/api/microsoft.aspnetcore.mvc.requestformlimitsattribute?view=aspnetcore-6.0
                        options.Limits.MaxConcurrentConnections = 100;
                        options.Limits.MaxConcurrentUpgradedConnections = 100;
                        //设置应用服务器Kestrel请求体最大为100MB
                        options.Limits.MaxRequestBodySize = int.MaxValue;
                    });
            }
            catch (Exception ex)
            {
                Log.Fatal(ex, "Host terminated unexpectedly");
            }
            finally
            {
                Log.CloseAndFlush();
            }
        }
    }
}