using Blazored.LocalStorage;
using Blazored.SessionStorage;
using HealthChecks.UI.Client;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Diagnostics.HealthChecks;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Localization;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.FileProviders;
using StackExchange.Redis;
using System.Globalization;
using System.Text.Json.Serialization;
using WebDoorCreator.Data;
using WebDoorCreator.Data.Services;
using WebDoorCreator.UI.Areas.Identity;
using WebDoorCreator.UI.Data;

var builder = WebApplication.CreateBuilder(args);
// configuration setup
Microsoft.Extensions.Configuration.ConfigurationManager configuration = builder.Configuration;


// REDIS setup
string connStringRedis = configuration.GetConnectionString("Redis");
if (string.IsNullOrEmpty(connStringRedis))
{
    connStringRedis = "localhost:6379, DefaultDatabase=11, connectTimeout=5000, syncTimeout=5000, asyncTimeout=5000, abortConnect=false, ssl=false";
}
string redisSrvAddr = connStringRedis.Substring(0, connStringRedis.IndexOf(":"));
// avvio oggetto shared x redis...
var redisMultiplexer = ConnectionMultiplexer.Connect(connStringRedis);

// AspNetCore Identity setup
var connectionString = configuration.GetConnectionString("Identity.DB");
string dbServerAddr = "127.0.0.1";
if (string.IsNullOrEmpty(connectionString))
{
    connectionString = "Server=SQL2016DEV;Database=WebDoorCreator; User ID=sa;Password=keyhammer16; integrated security=False; MultipleActiveResultSets=True; App=WebDoorCreator.SRV;";
}
else
{
    if (connectionString.Contains("Server"))
    {
        bool trovato = false;
        var dbTokens = connectionString.Split(";");
        int numTok = dbTokens.Count();
        int idx = 0;
        while (!trovato && idx < numTok)
        {
            if (dbTokens[idx].StartsWith("Server="))
            {
                // rimuovo la chaive Server...
                dbServerAddr = dbTokens[idx].Replace("Server=", "");
                // se ci fosse un nome (tipo \\sqlexpress) rimuovo...
                if (dbServerAddr.Contains("\\"))
                {
                    int sIdx = dbServerAddr.IndexOf("\\");
                    dbServerAddr = dbServerAddr.Substring(0, sIdx);
                }
                trovato = true;
            }
            idx++;
        }
    }
}
// healthchecks
builder.Services.AddHealthChecks()
    .AddSqlServer(connectionString, healthQuery: "SELECT 1;", name: "SqlServer", failureStatus: HealthStatus.Degraded, tags: new string[] { "DB", "MsSql" })
    .AddAsyncCheck($"DB PING ({dbServerAddr})", () => WebDoorCreator.UI.Health.Checks.PingCheck(dbServerAddr))
    .AddAsyncCheck($"Redis PING ({redisSrvAddr})", () => WebDoorCreator.UI.Health.Checks.PingCheck(redisSrvAddr))
    // 512 MB max allocated memory
    .AddProcessAllocatedMemoryHealthCheck(512, "Max Process memory (<512MB)", failureStatus: HealthStatus.Degraded) 
    .AddRedis(connStringRedis, "Redis", failureStatus: HealthStatus.Degraded)
    .AddAsyncCheck($"Config Table", () => WebDoorCreator.UI.Health.Checks.ConfigCount(configuration))
    .AddAsyncCheck($"Orders Table", () => WebDoorCreator.UI.Health.Checks.OrdersCount(configuration))
    .AddAsyncCheck($"Doors Table", () => WebDoorCreator.UI.Health.Checks.DoorsCount(configuration))
    ;

#if false
builder.Services
.AddHealthChecksUI(s =>
{
  s.AddHealthCheckEndpoint("WDC_UI_HC", "health");
  s.SetEvaluationTimeInSeconds(60);
  s.SetMinimumSecondsBetweenFailureNotifications(120);
  s.SetApiMaxActiveRequests(5);
  s.SetHeaderText("WDC.UI Health Check Status");
})
.AddInMemoryStorage(); 
#endif

// abilitazione x email management con MailKit
builder.Services.AddTransient<IEmailSender, MailKitEmailSender>();
builder.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"];
});


// aggiunta servizi x accesso dati...
builder.Services.AddControllers()
   .AddJsonOptions(c => c.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.Preserve);

// Add services to the container.
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();
builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();

builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor();
builder.Services.AddSingleton<WebDoorCreatorService>();
builder.Services.AddSingleton<WDCRefreshService>();
builder.Services.AddSingleton<WDCVocabularyService>();
builder.Services.AddSingleton<QueueDataService>(); ;
builder.Services.AddSingleton<IConnectionMultiplexer>(redisMultiplexer);
builder.Services.AddScoped<WDCUserService>();
builder.Services.AddScoped<UserManDataService>();
builder.Services.AddScoped<MessageService>();
builder.Services.AddScoped<AuthenticationStateProvider, RevalidatingIdentityAuthenticationStateProvider<IdentityUser>>();
builder.Services.AddHttpContextAccessor();
builder.Services.AddBlazoredLocalStorage();
builder.Services.AddBlazoredSessionStorage();
var app = builder.Build();

// aggiunt base URL x routing corretto
app.UsePathBase(configuration["RuntimeOpt:BaseUrl"]);

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    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 US...
var supportedCultures = new[]{
                new CultureInfo("en-US")
            };
app.UseRequestLocalization(new RequestLocalizationOptions
{
    DefaultRequestCulture = new RequestCulture("en-US"),
    SupportedCultures = supportedCultures,
    FallBackToParentCultures = false
});
CultureInfo.DefaultThreadCurrentCulture = CultureInfo.CreateSpecificCulture("en-US");

app.UseHttpsRedirection();

app.UseStaticFiles();

// gestione static files: https://learn.microsoft.com/en-us/aspnet/core/fundamentals/static-files?view=aspnetcore-8.0
string BasePathPdf = configuration.GetValue<string>("ServerConf:BasePathPdf") ?? configuration.GetValue<string>("OptConf:BasePathPdf") ?? "";
if (!string.IsNullOrEmpty(BasePathPdf))
{
    // verifico esista folder disegni
    if (Directory.Exists(BasePathPdf))
    {
        // gestione cartella x PDF
        app.UseStaticFiles(new StaticFileOptions
        {
            FileProvider = new PhysicalFileProvider(BasePathPdf),
            RequestPath = "/docs",
        });
    }
}

app.UseRouting();

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

app.MapControllers();
app.MapBlazorHub();

// config healthcheck: https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/health-checks
// prende tutti i predicati
app.MapHealthChecks("/health", new HealthCheckOptions
{
    Predicate = _ => true,
    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
});
// opzionalmente si puo' aggiungere richiesta AUTH
    //.RequireAuthorization();

// nasconde tutti i dettagli
app.MapHealthChecks("/health/live", new HealthCheckOptions
{
    Predicate = _ => false
});

app.MapFallbackToPage("/_Host");

app.Run();