using GWMS.Data;
using GWMS.User.Areas.Identity;
using GWMS.User.Data;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace GWMS.User
{
    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();
            }

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

            app.UseRouting();

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

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapBlazorHub();
                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)
        {
            string connString = Configuration.GetConnectionString("AuthConnection");
            var serverVersion = DbConfig.MysqlServerVersion(connString);

            // 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"];
            });

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

            // DB management
            services.AddDbContext<UserIdentityDbContext>(options =>
                options.UseMySql(connString, serverVersion));

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

            services.AddRazorPages();

            // rif auth
            // https://stackoverflow.com/questions/60687879/require-authorization-on-all-blazor-pages/60688109#60688109
            // https://www.c-sharpcorner.com/article/understand-basic-of-authorization-in-blazor-server-app/#:~:text=Authentication%20is%20a%20process%20of%20validating%20a%20user,UI%20option%20can%20be%20accessible%20by%20the%20user.

            // non funziona --> messo attributo in _Imports.razor e esclusione in Index page
#if false
            // richiesta esplicita autorizzazione
            services.AddAuthorization(options =>
            {
                options.FallbackPolicy = new AuthorizationPolicyBuilder()
                    .RequireAuthenticatedUser()
                    .Build();
            });
#endif

            services.AddServerSideBlazor();
            services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<IdentityUser>>();
            services.AddDatabaseDeveloperPageExceptionFilter();
            services.AddSingleton<WeatherForecastService>();
        }

        #endregion Public Methods
    }
}