//using AX.CloudDrive.Hubs;
using AX.FireTrainingSys.Middlewares;
using AX.FireTrainingSys.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http.Connections;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Formatters;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Hosting;
using Microsoft.IdentityModel.Tokens;
using Microsoft.IO;
using Microsoft.OpenApi.Models;
using Minio.AspNetCore;
using System;
using System.IdentityModel.Tokens.Jwt;
using System.IO;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace AX.FireTrainingSys
{
    public class Startup
    {
        private const string SandboxHub = "/hubs/sandbox";

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            #region JWT 相关
            services.Configure<JwtOptions>(Configuration.GetSection("JWT"));

            JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();

            services
                .AddAuthentication(options =>
                {
                    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
                })
                .AddJwtBearer(options =>
                {
                    var secret = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT:Secret"]));

                    options.TokenValidationParameters = new TokenValidationParameters
                    {
                        NameClaimType = JwtClaimTypes.Name,
                        RoleClaimType = JwtClaimTypes.Role,

                        ValidateIssuer = true,
                        ValidIssuer = Configuration["JWT:Issuer"],
                        ValidateAudience = true,
                        ValidAudience = Configuration["JWT:Audience"],
                        ValidateIssuerSigningKey = true,
                        IssuerSigningKey = secret,
                        RequireExpirationTime = true,
                        ValidateLifetime = true,
                        ClockSkew = TimeSpan.FromSeconds(30),
                    };

                    //支持 SignalR 非常规认证
                    options.Events = new JwtBearerEvents
                    {
                        OnMessageReceived = context =>
                        {
                            var accessToken = context.Request.Query["access_token"];

                            // 校验 Hub 路径
                            var path = context.HttpContext.Request.Path;

                            if (!string.IsNullOrEmpty(accessToken) &&
                                path.StartsWithSegments(SandboxHub))
                                context.Token = accessToken;

                            return Task.CompletedTask;
                        }
                    };
                });
            #endregion

            services.Configure<KestrelServerOptions>(options =>
            {
                options.AllowSynchronousIO = true;
            });

            services.AddControllers(options =>
            {
                options.InputFormatters.Insert(0, new RawJsonInputFormatter());
                options.OutputFormatters.Insert(0, new RawJsonOutputFormatter());
            });

            services.AddMemoryCache();

            services.AddDbContextPool<DriveDbContext>(options =>
            {
                var connectionString = Configuration.GetConnectionString("SQLite");
                options.UseSqlite(connectionString);
            });

#if DEBUG
            services.AddSwaggerGen(options =>
            {
                options.SwaggerDoc("v1", new OpenApiInfo { Title = $"{Program.ProductName} API", Version = "v1" });

                var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);

                options.IncludeXmlComments(xmlPath);
                options.IgnoreObsoleteActions();

                options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
                {
                    Description = "使用 JWT Bearer 模式进行授权。示例: \"Bearer {token}\"",
                    Name = "Authorization",             //Jwt default param name
                    In = ParameterLocation.Header,      //Jwt store address
                    Type = SecuritySchemeType.ApiKey,   //Security scheme type
                    Scheme = "Bearer"
                });

                options.AddSecurityRequirement(new OpenApiSecurityRequirement
                {
                    {
                        new OpenApiSecurityScheme
                        {
                            Reference = new OpenApiReference{Type = ReferenceType.SecurityScheme, Id = "Bearer"},
                        },
                        new string[] { }
                    }
                });
            });
#endif
            services.AddApiVersioning(options =>
            {
                options.DefaultApiVersion = new ApiVersion(1, 0);
                options.ReportApiVersions = true;
                options.AssumeDefaultVersionWhenUnspecified = true;
            });

            services.AddSignalR(hubOptions =>
            {
                var ping = int.Parse(Configuration["SignalR:KeepAliveInterval"]);
                var maxSize = long.Parse(Configuration["SignalR:MaximumReceiveMessageSize"]);

                hubOptions.KeepAliveInterval = TimeSpan.FromSeconds(ping);
                hubOptions.ClientTimeoutInterval = TimeSpan.FromSeconds(ping * 2);
                hubOptions.MaximumReceiveMessageSize = maxSize == 0 ? null : maxSize;
                hubOptions.MaximumParallelInvocationsPerClient = 500;

#if DEBUG
                hubOptions.EnableDetailedErrors = true;
#endif
            })
            .AddJsonProtocol(options =>
            {
                options.PayloadSerializerOptions.PropertyNameCaseInsensitive = true;
                options.PayloadSerializerOptions.IncludeFields = true;
            });

            services.AddGroupManager();

            services.AddMinio(options =>
            {
                var section = Configuration.GetSection("Minio");

                options.Endpoint = section.GetValue<string>("EndPoint");
                options.AccessKey = section.GetValue<string>("AccessKey");
                options.SecretKey = section.GetValue<string>("SecretKey");
                options.Region = section.GetValue<string>("Region");

                var enableHttps = section.GetValue<bool>("EnableHttps");

                options.OnClientConfiguration = client =>
                {
                    if (enableHttps)
                        client.WithSSL();
                };
            });

            services.TryAddSingleton<IJwtService, JwtService>();
            services.AddSingleton<IUserIdProvider, SubjectUserIdProvider>();
            services.AddSingleton<RecyclableMemoryStreamManager>();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseLicence();

#if DEBUG
            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", $"{Program.ProductName} API v1");
            });
            app.UseReDoc(c =>
            {
                c.RoutePrefix = "docs";
                c.DocumentTitle = $"{Program.ProductName} API v1";

                c.SpecUrl("/swagger/v1/swagger.json");
                c.EnableUntrustedSpec();
                c.ScrollYOffset(10);
                c.HideHostname();
                c.HideDownloadButton();
                c.ExpandResponses("200,201");
                c.RequiredPropsFirst();
                //c.NoAutoAuth();
                //c.PathInMiddlePanel();
                //c.HideLoading();
                //c.NativeScrollbars();
                //c.DisableSearch();
                //c.OnlyRequiredInSamples();
                //c.SortPropsAlphabetically();
            });
#endif

            app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                //endpoints.MapHub<SandboxHub>(SandboxHub, options =>
                //{
                //    options.Transports = HttpTransportType.WebSockets;
                //    options.ApplicationMaxBufferSize = 0;
                //    options.TransportMaxBufferSize = 0;
                //});
            });
        }
    }
}