using System;
using System.Reflection;
using System.Text;
using FastEndpoints;
using FastEndpoints.Swagger;
using GB5Shared.Connection;
using GB5Shared.Telemetry;
using GB5Shared.DateConverter;
using static GB5Shared.DateConverter.GB5JsonOptions;
using GB5Shared.DTO.Framework.CommonConfig;
using GB5Shared.GB5CommonFunction;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.QueryExecutor;
using GB5Shared.Storage;
using GB5Shared.Validation;
using GB5Shared.Vault;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.Extensions.Caching.Hybrid;
using Microsoft.Extensions.Hosting;
using OpenTelemetry;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

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

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

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

// -------------------------
// JSON Global (Minimal API / HttpContext)
// -------------------------
builder.Services.ConfigureHttpJsonOptions(options =>
{
    options.SerializerOptions.PropertyNamingPolicy = null;
    options.SerializerOptions.DictionaryKeyPolicy = null;
    options.SerializerOptions.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 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.Configure<Gb5SystemDTO>(
    builder.Configuration.GetSection("Gb5SystemDTO"));

// -------------------------
// Storage Provider (DMS file operations)
// StorageConfiguration values come from HashiCorp Vault, not appsettings.json
// -------------------------
builder.Services.AddGB5Storage(builder.Configuration.GetSection("StorageConfiguration"));

builder.Services.AddGB5Vault(builder.Configuration);

builder.Services.AddScoped<GB5Shared.RuleEngine.IConditionEvaluator,
                            GB5Shared.RuleEngine.JsonPathConditionEvaluator>();

// -------------------------
// Kestrel
// -------------------------
builder.Services.Configure<KestrelServerOptions>(options =>
{
    options.AllowSynchronousIO = true;
});
// -- OpenTelemetry (Tracing + Metrics) ----------------------------------------
builder.Services.AddGB5Telemetry(builder.Configuration, "GB5-DMS");

// ── Attachment path settings (used by BulkIngestionBLL → IAttachmentUploadService) ──
// IAttachmentUploadService/ITemplateResolutionEngine/IAttachmentPathResolutionService now live
// in GB5Shared.Attachment — not covered by the FrameworkBLL/FrameworkDAL scan below.
builder.Services.Configure<GB5Shared.Attachment.AttachmentPathSettings>(
    builder.Configuration.GetSection(GB5Shared.Attachment.AttachmentPathSettings.Section));
builder.Services.AddScoped<GB5Shared.Attachment.ITemplateResolutionEngine, GB5Shared.Attachment.TemplateResolutionEngine>();
builder.Services.AddScoped<GB5Shared.Attachment.IAttachmentUploadService, GB5Shared.Attachment.AttachmentUploadService>();
builder.Services.AddScoped<GB5Shared.Attachment.IAttachmentPathResolutionService, GB5Shared.Attachment.AttachmentPathResolutionService>();

// -------------------------
// Assembly Scan for DI
// -------------------------
var dmsBLLAssembly       = Assembly.Load("DMSBLL");
var dmsDALAssembly       = Assembly.Load("DMSDAL");

builder.Services.Scan(scan => scan
    .FromAssemblies(dmsBLLAssembly, dmsDALAssembly)
    // Canonical filter (mirrors GB5Framework/FrameworkSL/Program.cs's scan):
    //  - IHostedService: hosted services are registered separately with their own lifetime.
    //  - Exception: Exception implements ISerializable/_Exception, so AsImplementedInterfaces()
    //    would otherwise register exception types (e.g. QualifierActivationException) as services,
    //    and DI then fails trying to activate them via their (string) constructor.
    //  - records (detected via the compiler-generated <Clone>$ method): a record implicitly
    //    implements IEquatable<T>, so without this, DTOs/records get registered as services and
    //    the container fails trying to activate them via their data constructor.
    .AddClasses(c => c.Where(t => !t.IsAbstract && !t.IsInterface
        && !typeof(IHostedService).IsAssignableFrom(t)
        && !typeof(Exception).IsAssignableFrom(t)
        && t.GetMethod("<Clone>$") == null))
    .AsImplementedInterfaces()
    .WithScopedLifetime());

// ── HttpClient for Alfresco migration ────────────────────────────
// Named client used by AlfrescoMigrationDAL; timeout suited for large file downloads.
builder.Services.AddHttpClient("alfresco", client =>
{
    client.Timeout = TimeSpan.FromMinutes(10);
});

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

// -------------------------
// Swagger
// -------------------------
builder.Services.SwaggerDocument(o =>
{
    o.DocumentSettings = s =>
    {
        s.Title = "GB5 DMS API";
        s.Version = "v1";
        s.Description = "Document Management Service";
    };
});

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

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

app.UseCloudEvents();

// FIX: Was app.MapFastEndpoints() — wrong method, no serializer config
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, _) => "/dms" + internalUiRoute;
});

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

// -------------------------
// HTTPS & Authorization
// -------------------------
app.UseAuthorization();

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