using Microsoft.AspNetCore.Http.Extensions;
using Microsoft.EntityFrameworkCore;
using Microsoft.OpenApi.Models;
using MP.Core.Conf;
using MP.Data;
using MP.IOC.Components;
using MP.IOC.Data;
using MP.IOC.Services;
using NLog;
using NLog.Web;
using StackExchange.Redis;
using System.Net;
using System.Reflection;

var builder = WebApplication.CreateBuilder(args);

// recupero env corrente
var env = builder.Environment;
var logger = LogManager.Setup()
                .LoadConfigurationFromAppSettings()
                .GetCurrentClassLogger();

var assemblyVersion = Assembly.GetExecutingAssembly().GetName().Version?.ToString();
logger.Info($"MP.IOC | Program.cs: startup | v.{assemblyVersion}");
logger.Info($"Current ASPNETCORE_ENVIRONMENT: {env.EnvironmentName}");

// Config setup
ConfigurationManager configuration = builder.Configuration;
// REDIS setup
logger.Info("Config OK");
string confRedis = configuration.GetConnectionString("Redis");
string redisSrvAddr = confRedis.Substring(0, confRedis.IndexOf(":"));
logger.Info("Setup REDIS OK");


// YARP base config
builder.Services.AddReverseProxy().LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
builder.Services.AddHttpForwarder();

// HttpMessageInvoker (SocketsHttpHandler)
builder.Services.AddSingleton(sp =>
{
    var handler = new SocketsHttpHandler
    {
        AllowAutoRedirect = false,
        UseCookies = false,
        PooledConnectionLifetime = TimeSpan.FromMinutes(5),
        AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
    };

    // Accetta certificati non validi (dev only)
    handler.SslOptions = new System.Net.Security.SslClientAuthenticationOptions
    {
        RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true
    };

    return new HttpMessageInvoker(handler);
});
logger.Info("YARP reverse proxy configured");

builder.Services.Configure<RedisScriptsConfig>(
    builder.Configuration.GetSection("RedisScripts"));
logger.Info("RedisScript Provider configured");

// MP.Data Services Utils - Statistiche DB
builder.Services.AddIocDataLayer();

// base services
builder.Services.AddSingleton<PreserveBodyTransformer>();
builder.Services.AddSingleton<RouteStatsManager>();
builder.Services.AddHostedService<MetricsCalcService>();
builder.Services.AddHostedService<MetricsDbFlushService>();
builder.Services.AddSingleton<LuaScriptProvider>();

// Registra i servizi per Blazor
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();
// Aggiungi Health Checks
//builder.Services.AddHealthChecks()
//    .AddSqlServer(builder.Configuration.GetConnectionString("CoreDb"));

// MP.Data DbContext for Stats repositories
string utilsConnString = builder.Configuration.GetConnectionString("MP.Utils") ?? "Server=localhost;Database=MoonPro_Utils; integrated security=True; MultipleActiveResultSets=True; App=MP.IOC;";
builder.Services.AddDbContextFactory<MoonPro_UtilsContext>(options =>
    options.UseSqlServer(utilsConnString));

// generic controller
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
//builder.Services.AddSwaggerGen();
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo
    {
        Title = "EgaWare's Mapo Rest API",
        Version = $"v1 | {assemblyVersion}",
        Description = $"API documentation for v1 | AssemblyVersion {assemblyVersion}"
    });
});

// avvio oggetto shared x redis...
var redisMux = ConnectionMultiplexer.Connect(confRedis);
builder.Services.AddSingleton<IConnectionMultiplexer>(redisMux);

// oggetto principale accesso dati
builder.Services.AddSingleton<MpDataService>();

logger.Info("Standard service configured");

// WeightProvider: Redis/Memory da config
var weightOnRedis = builder.Configuration.GetValue<bool>("ServerConf:RedisWeight", false);
if (weightOnRedis)
{
    builder.Services.AddSingleton<IConnectionMultiplexer>(redisMux);
    builder.Services.AddSingleton<IWeightProvider, RedisWeightProvider>();
}
else
{
    builder.Services.AddSingleton<IWeightProvider, InMemoryWeightProvider>();
}
logger.Info($"Weight service configured | use Redis: {weightOnRedis}");

// RouteManager registration (singleton)
builder.Services.AddSingleton<RouteManager>();
logger.Info("Singleton Route Manager registered");

var app = builder.Build();

// Blocco per la migrazione automatica del DB Utils...
using (var scope = app.Services.CreateScope())
{
    var services = scope.ServiceProvider;
    try
    {
        var context = services.GetRequiredService<MoonPro_UtilsContext>();
        context.Database.Migrate();
    }
    catch (Exception ex)
    {
        var migrateLogger = services.GetRequiredService<ILogger<Program>>();
        migrateLogger.LogError(ex, "Si � verificato un errore durante l'aggiornamento del database.");
    }
}


// aggiunt base URL x routing corretto
string baseUrl = configuration.GetValue<string>("ServerConf:BaseUrlIoc") ?? "/MP/";
app.UsePathBase(baseUrl);
string routePath = configuration.GetValue<string>("ServerConf:RoutePath") ?? "/api/RIOB";
string fullPath = $"{baseUrl}{routePath}".Replace("//", "/");
logger.Info($"BaseUrl: {baseUrl}");

app.Use(async (ctx, next) =>
{
    logger.Debug($"Incoming request PathBase='{ctx.Request.PathBase}' Path='{ctx.Request.Path}' RawTarget='{ctx.Request.GetEncodedUrl()}'");
    await next();
});


// parametrizzare?!?!?
app.MapWhen(ctx =>
    ctx.Request.Path.StartsWithSegments(fullPath, StringComparison.OrdinalIgnoreCase) ||
    ctx.Request.Path.StartsWithSegments(routePath, StringComparison.OrdinalIgnoreCase) ||
    (ctx.Request.PathBase.HasValue && ctx.Request.Path.StartsWithSegments(routePath, StringComparison.OrdinalIgnoreCase)),
    builder =>
    {
        builder.Run(async ctx =>
        {
            var routeManager = ctx.RequestServices.GetRequiredService<RouteManager>();
            await routeManager.HandleAsync(ctx);
        });
    });

logger.Info("App: route Mapped");


// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment() || app.Environment.IsStaging())
{
    app.UseSwagger();
    //app.UseSwaggerUI();
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint($"{baseUrl}swagger/v1/swagger.json", "EgalWare's MAPO API v1");
    });
}
logger.Info("Added swagger");

app.UseHttpsRedirection();

app.UseAuthorization();

// aggiunta x index.html
app.UseDefaultFiles();
app.UseStaticFiles();
app.UseAntiforgery();

// Mappatura delle API
app.MapControllers();

// Mappatura della Dashboard Blazor
app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

//app.MapHealthChecks("/health");

logger.Info("Run App");

app.Run();