using Serilog;
using DocumentOperator.Infrastructure.Configuration;
using DocumentOperator.Application;
using DocumentOperator.Infrastructure;
using DocumentOperator.API.Middleware;
using DocumentOperator.API.Endpoints.v1;
using DocumentOperator.API.Configuration;

var builder = WebApplication.CreateBuilder(args);

// ========================================
// 1. Serilog Configuration
// ========================================
Log.Logger = new LoggerConfiguration()
    .ReadFrom.Configuration(builder.Configuration)
    .Enrich.FromLogContext()
    .Enrich.WithProperty("Application", "DocumentOperator")
    .CreateLogger();

builder.Host.UseSerilog();

Log.Information("Starting DocumentOperator API...");

try
{
    // ========================================
    // 2. Options Pattern Configuration
    // ========================================
    builder.Services.Configure<DocumentOperatorSettings>(
        builder.Configuration.GetSection(DocumentOperatorSettings.SectionName));

    builder.Services.Configure<RedisSettings>(
        builder.Configuration.GetSection(RedisSettings.SectionName));

    builder.Services.Configure<ApiKeySettings>(
        builder.Configuration.GetSection(ApiKeySettings.SectionName));

    // ========================================
    // 3. Services (Clean Architecture Layers)
    // ========================================
    builder.Services.AddApplication();      // Application Layer (MediatR, FluentValidation, Behaviors)
    builder.Services.AddInfrastructure();   // Infrastructure Layer (DevExpress, Services)

    builder.Services.AddEndpointsApiExplorer();
    builder.Services.AddSwaggerDocumentation();

    // ========================================
    // 4. Build App
    // ========================================
    var app = builder.Build();

    // ========================================
    // 5. Middleware Pipeline (Order matters!)
    // ========================================

    // Exception Handling FIRST (catches all exceptions from subsequent middleware)
    app.UseMiddleware<ExceptionHandlingMiddleware>();

    if (app.Environment.IsDevelopment())
    {
        app.UseSwagger();
        app.UseSwaggerUI();
    }

    app.UseSerilogRequestLogging(); // Log HTTP Requests

    app.UseHttpsRedirection();

    // ========================================
    // 6. Endpoints (Minimal API)
    // ========================================
    app.MapDocumentEndpoints(); // POST /api/v1/documents/validate

    Log.Information("DocumentOperator API started successfully");

    app.Run();
}
catch (Exception ex)
{
    Log.Fatal(ex, "Application startup failed");
    throw;
}
finally
{
    Log.CloseAndFlush();
}

// Make Program class accessible for Integration Tests
public partial class Program { }