using System.Reflection;
using System.Text;
using FastEndpoints;
using FastEndpoints.Swagger;
using GB5Shared.Connection;
using GB5Shared.Telemetry;
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.Validation;
using Microsoft.AspNetCore.Diagnostics;
using Microsoft.Extensions.Caching.Hybrid;
using OpenTelemetry;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

// -------------------------
// Bootstrap
// -------------------------
var builder = WebApplication.CreateBuilder(args);

// -------------------------
// Console Encoding
// -------------------------
Console.OutputEncoding = Encoding.UTF8;

// ── 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}");

// -------------------------
// Dapr & Controllers Setup
// -------------------------
builder.Services.AddDaprClient();

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

// -------------------------
// JSON Global (Minimal API / HttpContext)
// -------------------------
builder.Services.ConfigureHttpJsonOptions(options =>
{
    options.SerializerOptions.PropertyNamingPolicy = null;
    options.SerializerOptions.PropertyNameCaseInsensitive = true;
    options.SerializerOptions.AddGB5Converters();
});

// -------------------------
// Caching
// -------------------------
#pragma warning disable EXTEXP0018
builder.Services.AddHybridCache(options =>
{
    options.DefaultEntryOptions = new HybridCacheEntryOptions
    {
        Expiration = TimeSpan.FromMinutes(30),
        LocalCacheExpiration = TimeSpan.FromMinutes(5)
    };
    options.DisableCompression = false;
});
#pragma warning restore EXTEXP0018

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

// -------------------------
// CORS Policy
// -------------------------

// -------------------------
// 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"));
// -- OpenTelemetry (Tracing + Metrics) ----------------------------------------
builder.Services.AddGB5Telemetry(builder.Configuration, "GB5-AMP");

// -------------------------
// Assembly Scan for DI
// -------------------------
var AmpBLLAssembly = Assembly.Load("AmpBLL");
var AmpDALAssembly = Assembly.Load("AmpDAL");

builder.Services.Scan(scan => scan
    .FromAssemblies(AmpBLLAssembly, AmpDALAssembly)
    .AddClasses(c => c.Where(t => !t.IsAbstract && !t.IsInterface
                && (t.Namespace == null || !t.Namespace.Contains(".DTO"))))
    .AsImplementedInterfaces()
    .WithScopedLifetime());

// -------------------------
// FastEndpoints
// -------------------------
builder.Services.AddFastEndpoints();

// -------------------------
// Swagger
// -------------------------
builder.Services.SwaggerDocument(o =>
{
    o.DocumentSettings = s =>
    {
        s.Title = "GB5 AMP API";
        s.Version = "v1";
        s.Description = "API Metadata Platform";
    };
});

// -------------------------
// Build App
// -------------------------
var app = builder.Build();

// -------------------------
// Middleware
// -------------------------

// Global exception handler must be FIRST so it catches all downstream exceptions.
app.UseExceptionHandler(appError =>
{
    appError.Run(async context =>
    {
        context.Response.StatusCode = 500;
        context.Response.ContentType = "application/json";
        var error = context.Features.Get<IExceptionHandlerFeature>();
        if (error != null)
        {
            var logger = context.RequestServices.GetRequiredService<ILogger<Program>>();
            logger.LogError(error.Error, "Unhandled exception on {Method} {Path}", context.Request.Method, context.Request.Path);
        }
        await context.Response.WriteAsJsonAsync(new { message = "An internal server error occurred." });
    });
});

app.UseAuthorization();
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();

// -------------------------
// Swagger UI (All Environments)
// -------------------------
app.UseOpenApi();

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

// -------------------------
// Test Endpoint
// -------------------------
app.MapGet("/", () => "Hello from GB5 AMP Service (.NET 9)");

// -------------------------
// Run the Application
// -------------------------
app.Run();