using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Identity.Web;
using Registration.Data;
using Registration.Mock;

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices((context, services) =>
    {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();

        // =============================================================
        // JWT Authentication — Entra External ID (CIAM)
        // Validates Bearer tokens issued by usimclients.ciamlogin.com.
        // AzureAd config is in local.settings.json (dev) or Function App
        // Configuration (production) using AzureAd__ prefix.
        // =============================================================
        services.AddAuthentication()
            .AddMicrosoftIdentityWebApi(context.Configuration.GetSection("AzureAd"));

        services.AddAuthorization();

        // =============================================================
        // Data layer — SqlDataService backed by dbRegistration.
        // Connection string: ConnectionStrings:Sql in local.settings.json
        // or the "Sql" connection string in Function App Configuration.
        // =============================================================
        services.AddSingleton<SqlService>();
        services.AddSingleton<IRegistrationDataService, SqlDataService>();
    })
    .Build();

host.Run();