using System.Reflection;
using System.Linq;
using System.Text;
using FastEndpoints;
using FastEndpoints.Swagger;
using FLSSL.Hubs;
using GB5Shared.Connection;
using GB5Shared.DaprCache;
using GB5Shared.DateConverter;
using static GB5Shared.DateConverter.GB5JsonOptions;
using GB5Shared.DTO.Framework.CommonConfig;
using GB5Shared.EventLogPublish;
using GB5Shared.GB5CommonFunction;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.QueryExecutor;
using GB5Shared.Telemetry;
using GB5Shared.Validation;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.Extensions.Caching.Hybrid;
using OpenTelemetry;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

var builder = WebApplication.CreateBuilder(args);

// ── Port from config — change "AppPort" in appsettings.json to use any port ──
var appPort = builder.Configuration.GetValue<int>("AppPort");
builder.WebHost.UseUrls($"http://0.0.0.0:{appPort}");

Console.OutputEncoding = Encoding.UTF8;

// ── Dapr ──────────────────────────────────────────────────────────
builder.Services.AddDaprClient();

builder.Services.AddControllers()
    .AddDapr()
    .AddJsonOptions(options =>
    {
        options.JsonSerializerOptions.PropertyNamingPolicy = null;
        options.JsonSerializerOptions.DictionaryKeyPolicy  = null;
        options.JsonSerializerOptions.AddGB5Converters();
    });

// ── Caching ───────────────────────────────────────────────────────
#pragma warning disable EXTEXP0018
builder.Services.AddHybridCache(options =>
{
    options.DefaultEntryOptions = new HybridCacheEntryOptions();
    options.DisableCompression  = false;
});
#pragma warning restore EXTEXP0018

builder.Services.AddMemoryCache();
builder.Services.AddDistributedMemoryCache();

// ── CORS ──────────────────────────────────────────────────────────

// ── Application Services ──────────────────────────────────────────
builder.Services.AddScoped<IQueryExecutor, QueryExecutor>();
builder.Services.AddScoped<IApplicationConnection, ApplicationConnection>();
builder.Services.AddScoped<IGB5CommonFunction, GB5CommonFunction>();
builder.Services.AddScoped<IValidation, Validation>();
builder.Services.AddScoped<AutoNumber>();
builder.Services.AddScoped<GB5Shared.CriteriaConfig.ICriteriaConfigFastSave, GB5Shared.CriteriaConfig.CriteriaConfigFastSave>();
builder.Services.AddScoped<KeyInvalidate>();
builder.Services.AddScoped<EventLogPublish>();

builder.Services.Configure<Gb5SystemDTO>(
    builder.Configuration.GetSection("Gb5SystemDTO"));

// ── Named HTTP Clients ────────────────────────────────────────────
// FlsBridge — used by FlsEventBLL for HTTP bridge deliveries
builder.Services.AddHttpClient("FlsBridge")
    .SetHandlerLifetime(TimeSpan.FromMinutes(5));

// Dapr sidecar client — used by FlsEventBLL for Dapr pub/sub deliveries
builder.Services.AddHttpClient("Dapr")
    .SetHandlerLifetime(TimeSpan.FromMinutes(5));

// ── Kestrel ───────────────────────────────────────────────────────
builder.Services.Configure<KestrelServerOptions>(options =>
{
    options.AllowSynchronousIO = true;
});

// ── SignalR ───────────────────────────────────────────────────────
builder.Services.AddSignalR(options =>
{
    options.EnableDetailedErrors      = builder.Environment.IsDevelopment();
    options.KeepAliveInterval         = TimeSpan.FromSeconds(15);
    options.ClientTimeoutInterval     = TimeSpan.FromSeconds(60);
    options.MaximumReceiveMessageSize = 32 * 1024;
});

// ── Telemetry ─────────────────────────────────────────────────────
builder.Services.AddGB5Telemetry(builder.Configuration, "GB5-FLS");

// ── Assembly Scan for DI ──────────────────────────────────────────
var flsBllAssembly = Assembly.Load("FLSBLL");
var flsDalAssembly = Assembly.Load("FLSDAL");

builder.Services.Scan(scan => scan
    .FromAssemblies(flsBllAssembly, flsDalAssembly)
    // Exclude plain DTOs/records (any namespace containing ".DTO", not just an exact "DTOs"
    // last-segment match — FLSDAL.DTO.Survey.SaveSurveyDraftRequest slipped past the old check)
    // and Exception types. A `record` implicitly implements IEquatable<T> and every Exception
    // implements ISerializable, so without this filter AsImplementedInterfaces() registers them
    // as services and the container later fails trying to activate them via their data/message
    // constructor.
    .AddClasses(c => c.Where(t => !t.IsAbstract && !t.IsInterface
        && (t.Namespace == null || !t.Namespace.Contains(".DTO"))
        && !typeof(Exception).IsAssignableFrom(t)))
    .AsImplementedInterfaces()
    .WithScopedLifetime());

// ── FastEndpoints ─────────────────────────────────────────────────
var endpointAssemblies = new[]
{
    Assembly.Load("FLSSL"),
    Assembly.Load("FLSBLL"),
    Assembly.Load("FLSDAL"),
    Assembly.Load("GB5Shared")
};

builder.Services.AddFastEndpoints(o =>
{
    o.Assemblies = endpointAssemblies;
});

// ── Swagger ───────────────────────────────────────────────────────
builder.Services.SwaggerDocument(o =>
{
    o.DocumentSettings = s =>
    {
        s.Title       = "GB5 FLS API";
        s.Version     = "v1";
        s.Description = "Form Lifecycle Service — surveys, quick ratings, token-based response collection";
    };

    o.EnableJWTBearerAuth = false;
    o.ShortSchemaNames    = true;
});

// ── Build ─────────────────────────────────────────────────────────
var app = builder.Build();

app.UseCloudEvents();

app.UseMiddleware<GB5Shared.Telemetry.Middleware.RequestTracingMiddleware>();
app.UseMiddleware<GB5Shared.Middleware.SessionHeartbeatMiddleware>();

app.UseFastEndpoints(c =>
{
    c.Serializer.Options.PropertyNamingPolicy = null;
    c.Serializer.Options.DictionaryKeyPolicy  = null;
    c.Serializer.Options.AddGB5Converters();
});

app.MapControllers();
app.MapSubscribeHandler();

// ── SignalR Hub ───────────────────────────────────────────────────
app.MapHub<FlsMonitorHub>("/hubs/fls-monitor");

// ── Swagger UI ────────────────────────────────────────────────────
app.UseOpenApi();

app.UseSwaggerUi(o =>
{
    o.Path          = "/GB5Documentation";
    o.DocumentPath  = "/swagger/{documentName}/swagger.json";
    o.TransformToExternalPath = (internalUiRoute, _) => "/fls" + internalUiRoute;
});

app.MapGet("/", () => "Hello from GB5 FLS API (.NET 9)");

app.UseAuthorization();

app.Run();