using Infrastructure.Application.Services.Settings;
using Infrastructure.Data;
using Infrastructure.Extensions;
using Infrastructure.Security;
using Infrastructure.Web;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Localization;
using Microsoft.AspNetCore.Mvc.Razor;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Text;
using System.Text.Encodings.Web;
using System.Text.Unicode;
using System.Threading.Tasks;
using TeacherExt.Data;
using Microsoft.AspNetCore.Mvc.DataAnnotations;

namespace TeacherExt
{
    public class Startup
    {
        private readonly string _origins = "AllowAllHeaders";

        public Startup(IConfiguration configuration, IHostEnvironment hostEnvironment)
        {
            Configuration = configuration;
            HostEnvironment = hostEnvironment;
        }

        public IConfiguration Configuration { get; }

        public IHostEnvironment HostEnvironment { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSwaggerGen();
            services.AddSingleton(HtmlEncoder.Create(UnicodeRanges.All));
            services.AddHttpContextAccessor();
            services.AddCors(options => options.AddPolicy(_origins, builder =>
             {
                 builder.SetIsOriginAllowed(o => true)
                 .AllowAnyMethod()
                 .AllowAnyHeader()
                 .AllowCredentials();
             }));
            var database = Configuration.GetValue<string>("database");
            services.AddTransient<AesHelper>();
            var connstr = Configuration.GetConnectionString("mariyadb");
            services.AddDbContext<TeacherDbContext>(o => o.UseMySql(connstr, ServerVersion.AutoDetect(connstr)));

            services.AddDistributedMemoryCache();
            services.AddScoped<DbContext, TeacherDbContext>();
            services.AddTransient(typeof(IRepository<>), typeof(EfRepository<>));
            services.AddTransient<IEncryptionService, EncryptionService>();
            services.AddTransient<SettingService>();
            services.AddTransient<ISettingService, CachedSettingService>();
            services.AddTransient<IUserService, UserService>();
            services.AddLocalization(options => options.ResourcesPath = null);
            services.AddSingleton<IValidationAttributeAdapterProvider, LocalizedValidationAttributeAdapterProvider>();
            services.AddSingleton<LocalizedValidationMetadataProvider>();
            services.Configure<RequestLocalizationOptions>(
                options =>
                {
                    var supportedCultures = new List<CultureInfo>
                        {
                            new CultureInfo("en-US"),
                            new CultureInfo("zh-CN"),
                        };

                    options.DefaultRequestCulture = new RequestCulture(culture: "zh-CN", uiCulture: "zh-CN");
                    options.SupportedCultures = supportedCultures;
                    options.SupportedUICultures = supportedCultures;
                    options.RequestCultureProviders.Insert(0, new QueryStringRequestCultureProvider());
                });
            services.AddMvc(o => o.ModelMetadataDetailsProviders.Add(
                new LocalizedValidationMetadataProvider(services.BuildServiceProvider().GetRequiredService<IStringLocalizerFactory>()))
            )
                .AddNewtonsoftJson()
                .AddControllersAsServices();
            //.AddMvcLocalization()
            //.AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
            //.AddDataAnnotationsLocalization(options =>
            //{
            //    options.DataAnnotationLocalizerProvider = (type, factory) =>
            //    {
            //        var localizer = factory.Create("Resources.Resource", Assembly.GetEntryAssembly().GetName().Name);
            //        return localizer;
            //    };
            //}); 

            services.AddControllers()
                .ConfigureApiBehaviorOptions(options =>
                {
                    options.SuppressConsumesConstraintForFormFileParameters = true;
                    options.SuppressInferBindingSourcesForParameters = true;
                    options.SuppressModelStateInvalidFilter = true;
                    options.SuppressMapClientErrors = true;
                    //options.ClientErrorMapping[404].Link = "https://httpstatuses.com/404";
                })
                .AddNewtonsoftJson(o =>
                {
                    o.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
                });
            services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            }).AddJwtBearer(o =>
            {
                services.AddSingleton(o);
                o.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["jwt:key"])),
                    ValidateIssuer = false,
                    ValidIssuer = Configuration["jwt:issuer"],
                    ValidateAudience = false,
                    ValidAudience = Configuration["jwt:audience"]
                };
                o.Events = new JwtBearerEvents
                {
                    OnTokenValidated = context =>
                    {
                        if (context.SecurityToken == null)
                        {
                            context.Fail("token error");
                        }
                        else if (DateTime.UtcNow > context.SecurityToken.ValidTo)
                        {
                            context.Fail("token time out");
                        }
                        return Task.CompletedTask;
                    },
                    OnForbidden = context =>
                    {
                        return context.Response.WriteAsync("403 forbidden");
                    },
                    OnAuthenticationFailed = context =>
                    {
                        return Task.CompletedTask;
                    },
                    OnChallenge = context =>
                    {
                        if (!context.Request.IsAjax())
                        {
                            context.Response.Redirect(Configuration["Admin:login"] ?? "/Account/Login");
                            context.HandleResponse();
                        }
                        return Task.CompletedTask;
                    },
                    OnMessageReceived = context =>
                    {
                        if (!context.Request.IsStatic())
                        {
                            if (context.Request.Query.ContainsKey("access_token"))
                            {
                                context.Token = context.Request.Query["access_token"];
                            }
                            else
                            {
                                var jwtCookieName = context.HttpContext.GetJwtCookieName();
                                if (!context.Request.Headers.ContainsKey("Authorization") && context.Request.Cookies.Keys.Contains(jwtCookieName))
                                {
                                    context.Token = context.Request.Cookies[jwtCookieName];
                                }
                            }
                        }
                        return Task.CompletedTask;
                    }
                };
                o.SecurityTokenValidators.Clear();
                o.SecurityTokenValidators.Insert(0, new JwtTokenValidator(services.BuildServiceProvider()));
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            });
            app.UseStaticFiles();
            var locOptions = app.ApplicationServices.GetService<IOptions<RequestLocalizationOptions>>();
            app.UseRequestLocalization(locOptions.Value);
            app.UseRouting()
                .UseCors(_origins)
                .UseAuthentication()
                .UseAuthorization()
                .UseEndpoints(endpoints =>
                {
                    endpoints.MapControllerRoute(
                        name: "default",
                        pattern: "{controller=Home}/{action=Index}/{id?}");
                });
            /*生成测试数据库*/
            //if(this.HostEnvironment.IsDevelopment())
            //{
            //    using var scope = app.ApplicationServices.CreateScope();
            //    using var db = scope.ServiceProvider.GetRequiredService<DbContext>();
            //    db.Database.EnsureCreated();
            //}
        }
    }
}