using Blazorise;
using Blazorise.Bootstrap;
using Blazorise.Icons.FontAwesome;
using ElmahCore.Mvc;
using GWMS.Data;
using GWMS.UI.Areas.Identity;
using GWMS.UI.Data;
using HealthChecks.UI.Client;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Diagnostics.HealthChecks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI;
using Microsoft.AspNetCore.Localization;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.Hosting;
using Quartz;
using Quartz.Impl;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;

namespace GWMS.UI
{
    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();

            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)
        {
            // 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;

            // 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(15);
                  s.SetMinimumSecondsBetweenFailureNotifications(60);
                  s.SetApiMaxActiveRequests(5);
                  s.SetHeaderText("GWMS Health Check Status");
              })
              .AddInMemoryStorage();

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

            services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
                .AddEntityFrameworkStores<UserIdentityDbContext>();

            services.AddBlazorise(options =>
            {
                options.ChangeTextOnKeyPress = true; // optional
            })
           .AddBootstrapProviders()
           .AddFontAwesomeIcons();

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

            services.AddSingleton<GWMSDataService>();
            services.AddScoped<MessageService>();

#if false
            // aggiunta quartz scheduler
            var scheduler = StdSchedulerFactory.GetDefaultScheduler().GetAwaiter().GetResult();
            services.AddSingleton(scheduler);
            services.AddHostedService<QuartzHostedService>();

#endif
        }

        #endregion Public Methods
    }
}