using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using MP.Prog.Data;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;

namespace MP.Prog
{
    public class Startup
    {
        #region Public Constructors

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

        #endregion Public Constructors

        #region Public Properties

        public IConfiguration Configuration { get; }

        #endregion Public Properties

        #region Public Methods

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                //app.UseMigrationsEndPoint();
            }
            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();
            }

            // cultura IT...
            var supportedCultures = new[]{
                new CultureInfo("it-IT")
            };
            app.UseRequestLocalization(new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("it-IT"),
                SupportedCultures = supportedCultures,
                FallBackToParentCultures = false
            });
            CultureInfo.DefaultThreadCurrentCulture = CultureInfo.CreateSpecificCulture("it-IT");

            //// Registrazione Elmah:
            //// https://github.com/ElmahCore/ElmahCore
            //app.UseElmah();

            // fix forwarders
            app.UseForwardedHeaders(new ForwardedHeadersOptions
            {
                ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
            });

            //app.UseAuthentication();

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

            app.UseRouting();

            //app.UseAuthentication();
            //app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                //endpoints.MapControllers();
                endpoints.MapBlazorHub();
                //endpoints.MapHealthChecksUI();
                //endpoints.MapHealthChecks("/health", new HealthCheckOptions
                //{
                //    Predicate = _ => true,
                //    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
                //});
                endpoints.MapFallbackToPage("/_Host");
            });
        }

        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
#if false
            // init info x DB
            string dbServerAddr = Configuration["DbConfig:Server"];
            string nKey = Configuration["DbConfig:nKey"];
            string sKey = Configuration["DbConfig:sKey"];
            DbConfig.InitDb(dbServerAddr, nKey, sKey);
            // inizializzo il DB e creo (se necessario) l'utente
            DbConfig.CheckUser(nKey, sKey);
            // verifico se serve applicazione migrazioni
            //DbConfig.ExecMigrationMain();
            //DbConfig.ExecMigrationIdentity();

            // altri parametri per check vari
            string connStringDB = DbConfig.CONNECTION_STRING;
            string connStringRedis = Configuration.GetConnectionString("Redis");
            string redisSrvAddr = connStringRedis.Substring(0, connStringRedis.IndexOf(":"));
            //var qrCodeUri = new Uri(Configuration["ZCodeUrl"]);
            //string qrCodeAddr = qrCodeUri.Host;
#endif

#if false
            // healthchecks
            services.AddHealthChecks()
                .AddMySql(connStringDB, "MySql instance")
                .AddAsyncCheck($"DB PING ({dbServerAddr})", () => Health.Checks.PingCheck(dbServerAddr))
                .AddAsyncCheck($"Redis PING ({redisSrvAddr})", () => Health.Checks.PingCheck(redisSrvAddr))
                //.AddAsyncCheck($"QrCode PING ({qrCodeAddr})", () => Health.Checks.PingCheck(qrCodeAddr))
                .AddProcessAllocatedMemoryHealthCheck(512, "Max Process memory (<512MB)", failureStatus: HealthStatus.Degraded) // 512 MB max allocated memory
                .AddRedis(Configuration.GetConnectionString("Redis"), "Redis", failureStatus: HealthStatus.Degraded)
                //.AddUrlGroup(new Uri(Configuration["ZCodeUrl"]), name: $"QrCode Gen ({Configuration["ZCodeUrl"]})", failureStatus: HealthStatus.Degraded)
                .AddAsyncCheck($"MySql Root User", () => Health.Checks.DbUserRoot("MySql"))
                .AddAsyncCheck($"MySql App Users", () => Health.Checks.DbUserApp(DbConfig.DATABASE_NAME))
                .AddAsyncCheck($"MySql Identity", () => Health.Checks.DbIdentity(DbConfig.DATABASE_NAME))
                .AddAsyncCheck($"MySql PlantLog", () => Health.Checks.DbPlantLogTable(DbConfig.DATABASE_NAME))
                ;
            //.AddDiskStorageHealthCheck(s => s.AddDrive("C:\\", 1024)) // 1024 MB (1 GB) free minimum
            //.AddProcessHealthCheck("ProcessName", p => p.Length > 0) // check if process is running
            //.AddWindowsServiceHealthCheck("someservice", s => s.Status == ServiceControllerStatus.Running);

            services
              .AddHealthChecksUI(s =>
              {
                  s.AddHealthCheckEndpoint("GWMS_Services", "health");
                  s.SetEvaluationTimeInSeconds(60);
                  s.SetMinimumSecondsBetweenFailureNotifications(120);
                  s.SetApiMaxActiveRequests(5);
                  s.SetHeaderText("GWMS Health Check Status");
              })
              .AddInMemoryStorage();

            // abilitazione x email management con MailKit
            services.AddTransient<IEmailSender, MailKitEmailSender>();
            services.Configure<MailKitEmailSenderOptions>(options =>
            {
                options.Host_Address = Configuration["ExternalProviders:MailKit:SMTP:Address"];
                options.Host_Port = Convert.ToInt32(Configuration["ExternalProviders:MailKit:SMTP:Port"]);
                options.Host_Username = Configuration["ExternalProviders:MailKit:SMTP:Account"];
                options.Host_Password = Configuration["ExternalProviders:MailKit:SMTP:Password"];
                options.Sender_EMail = Configuration["ExternalProviders:MailKit:SMTP:SenderEmail"];
                options.Sender_Name = Configuration["ExternalProviders:MailKit:SMTP:SenderName"];
            });
#endif

            // cookie applicazione da 14 gg (defaul) a 30
            services.ConfigureApplicationCookie(o =>
            {
                o.ExpireTimeSpan = TimeSpan.FromDays(30);
                o.SlidingExpiration = true;
            });
#if false
            // token di sicurezza dati a 3h
            services.Configure<DataProtectionTokenProviderOptions>(o =>
               o.TokenLifespan = TimeSpan.FromHours(3));
#endif

#if false
            // setup MySql
            //string connString = Configuration.GetConnectionString("AdminConnection");
            var serverVersion = DbConfig.MysqlServerVersion(connStringDB);
            services.AddDbContext<UserIdentityDbContext>(options =>
                options.UseMySql(connStringDB, serverVersion));

            // identity management
            services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
                .AddRoles<IdentityRole>()
                .AddEntityFrameworkStores<UserIdentityDbContext>();
#endif

#if false
            services.AddBlazorise(options =>
                {
                    options.ChangeTextOnKeyPress = true; // optional
            })
               .AddBootstrapProviders()
               .AddFontAwesomeIcons();
#endif
            //// Elmah
            //services.AddElmah();
            //string elmaConn = "Data Source=SQL2016DEV;Initial Catalog=Elmah;User ID=sa;Password=keyhammer16;integrated security=False;MultipleActiveResultSets=True;App=SHERPA.BBM;";
            //services.AddElmah<SqlErrorLog>(options =>
            //{
            //    options.ConnectionString = elmaConn;
            //});

            services.AddStackExchangeRedisCache(options =>
            {
                //options.Configuration = "localhost:6379";
                options.ConfigurationOptions = new StackExchange.Redis.ConfigurationOptions() { KeepAlive = 180, DefaultDatabase = 12, EndPoints = { { "localhost", 6379 } } };
                options.InstanceName = "GWMS:";
            });

            services.AddLocalization();

            services.AddRazorPages();
            services.AddServerSideBlazor();
            services.AddSingleton<WeatherForecastService>();

#if false
            services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<IdentityUser>>();
            services.AddDatabaseDeveloperPageExceptionFilter();
#endif
            services.AddSingleton<IConfiguration>(Configuration);
            //services.AddTransient<Services.BlazorTimer>();

#if false
            //services.AddSingleton<GWMSDataService>();
            services.AddScoped<GWMSDataService>();
#endif
            services.AddScoped<MessageService>();
        }

        #endregion Public Methods
    }
}