books/backend/Books.Api/Program.cs

using Books.Api;
using Books.Api.GraphQL;
using GraphQL;
using GraphQL.Server.Ui.Altair;
using Hangfire;

// Enable legacy timestamp behavior for Npgsql 6.0+
// This allows DateTimeOffset with non-UTC offsets to be written to timestamptz columns
AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);

var builder = WebApplication.CreateBuilder(args);

// Configure EventFlow, Hangfire, GraphQL and all services
Startup.ConfigureServices(builder.Services, builder.Configuration, builder.Environment);

var app = builder.Build();

// Configure the HTTP request pipeline
if (app.Environment.IsDevelopment())
{
    app.UseHangfireDashboard();
}

app.UseHttpsRedirection();

// GraphQL endpoint
app.UseGraphQL<BooksSchema>("/graphql");

// GraphQL UI (development only) - use external tools like Altair, Insomnia, or GraphiQL
if (app.Environment.IsDevelopment())
{
    app.UseGraphQLAltair("/graphql/ui");
}

app.Run();