Program.cs

using backend.Services;
using DotNetEnv;
using DotNetEnv.Configuration;
using Klustr_api.Data;
using Klustr_api.Dtos.Hub;
using Klustr_api.Dtos.User;
using Klustr_api.Hubs;
using Klustr_api.Interfaces;
using Klustr_api.Repository;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Microsoft.OpenApi.Models;

var builder = WebApplication.CreateBuilder(args);

builder.Configuration.AddEnvironmentVariables();

builder.Configuration.AddDotNetEnv(
    ".env", LoadOptions.TraversePath()
);
builder.Services.AddCors(options =>
{
    options.AddPolicy(name: "default",
                      policy =>
                      {
                          policy.WithOrigins("http://localhost:5173")
                          .AllowAnyHeader()
                          .AllowAnyMethod()
                          .SetIsOriginAllowed((host) => true)
                          .AllowCredentials();
                      });
});
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(option =>
{
    option.SwaggerDoc("v1", new OpenApiInfo { Title = "Klustr API", Version = "v1" });
    option.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
    {
        In = ParameterLocation.Header,
        Description = "Please enter a valid token",
        Name = "Authorization",
        Type = SecuritySchemeType.Http,
        BearerFormat = "JWT",
        Scheme = "Bearer"
    });
    option.AddSecurityRequirement(new OpenApiSecurityRequirement
    {
        {
            new OpenApiSecurityScheme
            {
                Reference = new OpenApiReference
                {
                    Type=ReferenceType.SecurityScheme,
                    Id="Bearer"
                }
            },
            new string[]{}
        }
    });
});

builder.Services.AddDbContext<ApplicationDBContext>(options =>
{
    options.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection"));
});

builder.Services.AddScoped<IUserRepository, UserRepository>();
builder.Services.AddScoped<ITokenService, TokenService>();
builder.Services.AddScoped<IRoomRepository, RoomRepository>();
builder.Services.AddScoped<IMemberRepository, MemberRepository>();
builder.Services.AddScoped<IMessageRepository, MessageRepository>();
builder.Services.AddSingleton<IDictionary<string, UserRoomConnection>>(new Dictionary<string, UserRoomConnection>());
builder.Services.AddSingleton<IDictionary<string, string?>>(new Dictionary<string, string?>());
builder.Services.AddSingleton<IDictionary<string, UserDto>>(new Dictionary<string, UserDto>());
builder.Services.AddSingleton<List<string>>([]);
builder.Services.AddSignalR();

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme =
    options.DefaultChallengeScheme =
    options.DefaultForbidScheme =
    options.DefaultScheme =
    options.DefaultSignInScheme =
    options.DefaultSignOutScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(options =>
{
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuer = true,
        ValidIssuer = builder.Configuration["JWT:Issuer"],
        ValidateAudience = true,
        ValidAudience = builder.Configuration["JWT:Audience"],
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(System.Text.Encoding.UTF8.GetBytes(builder.Configuration["JWT:SigningKey"])),
    };
});

var app = builder.Build();

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

app.UseCors("default");
app.UseHttpsRedirection();
app.MapControllers();
app.MapHub<ChatHub>("/chathub");

app.Run();