Program.cs

using Microsoft.AspNetCore.Authentication.OpenIdConnect;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.Authorization;
using Microsoft.Identity.Web;
using Microsoft.Identity.Web.UI;
using NetGraphWithAI.AIHelper;
using NetGraphWithAI.Graph;
using OpenAI_API;

var builder = WebApplication.CreateBuilder(args);
var initialScopes = builder.Configuration["DownstreamApi:Scopes"]?.Split(' ') ?? builder.Configuration["MicrosoftGraph:Scopes"]?.Split(' ');
builder.Services.AddTransient<IConfiguration>(sp =>
 {
 IConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
 configurationBuilder.AddJsonFile("appsettings.json")
 .SetBasePath(AppDomain.CurrentDomain.BaseDirectory)
 .AddUserSecrets<Program>();
 return configurationBuilder.Build();
 });



builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)

 
 .AddMicrosoftIdentityWebApp(builder.Configuration)
 .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
 .AddMicrosoftGraph(builder.Configuration.GetSection("DownstreamApi"))
 .AddInMemoryTokenCaches();

builder.Services.AddControllersWithViews(options =>
 {
 var policy = new AuthorizationPolicyBuilder()
 .RequireAuthenticatedUser()
 .Build();
 options.Filters.Add(new AuthorizeFilter(policy));
 });

 builder.Services
 .AddRazorPages()
 .AddMicrosoftIdentityUI();
 builder.Services.AddScoped<HttpClient>( (p) => 
 {
 var apiToken = p.GetService<IConfiguration>().GetValue<string>("OpenAIAPI");
 var client = new HttpClient();
 client.DefaultRequestHeaders.Add("authorization", "Bearer "+apiToken);
 return client;
 });
 builder.Services.AddControllers();
 builder.Services.AddScoped<GraphEmailClient>();
 builder.Services.AddScoped<GraphProfileClient>();
 builder.Services.AddScoped<OpenAIAPI>( (p) =>
 {
 var apiToken = p.GetService<IConfiguration>().GetValue<string>("OpenAIAPI");
 var client = new OpenAIAPI(apiToken);
 return client;
 });
 builder.Services.AddScoped<IAIHelperService, AIHelperService>();


;
var app = builder.Build();
 app.UseHttpsRedirection();
 app.UseStaticFiles();
 app.UseRouting();
 app.UseAuthentication();
 app.UseAuthorization();
 app.MapRazorPages();
 app.UseEndpoints(c =>
 
 {c.MapControllerRoute(
 name: "default",
 pattern: "{controller=API}/{action=Index}/{id?}"); 
 }); 

app.Run();