Program.cs

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Serilog;
using System.Text;
using TaskManagement.BackgroundJobs;
using TaskManagement.Data;
using TaskManagement.Interfaces;
using TaskManagement.Repositories;
using TaskManagement.Services;

var builder = WebApplication.CreateBuilder(args);

Log.Logger = new LoggerConfiguration()
    .ReadFrom.Configuration(builder.Configuration)
    .Enrich.FromLogContext()
    .WriteTo.Console()
    .WriteTo.File("logs/log-.txt", rollingInterval: RollingInterval.Day)
    .CreateLogger();

builder.Host.UseSerilog();

builder.Services.AddControllers();

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var connectionString = builder.Configuration.GetConnectionString("DefaultConnection")
    ?? throw new InvalidOperationException("Connection string 'DefaultConnection' is not configured.");

builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));

builder.Services.AddScoped<ITaskRepository, TaskRepository>();
builder.Services.AddScoped<ITaskService, TaskService>();
builder.Services.AddScoped<IAuthService, AuthService>();
builder.Services.Configure<JwtSettings>(builder.Configuration.GetSection("Jwt"));
builder.Services.AddHostedService<ExpiredTaskBackgroundService>();

var jwtSection = builder.Configuration.GetSection("Jwt");
var jwtKey = jwtSection["Key"]
    ?? throw new InvalidOperationException("JWT Key is missing.");

builder.Services
    .AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,

            ValidIssuer = jwtSection["Issuer"],
            ValidAudience = jwtSection["Audience"],

            IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(jwtKey))
        };
    });
builder.Services.AddCors(options =>
{
    options.AddPolicy("AllowNextJs", policy =>
    {
        policy.WithOrigins("http://localhost:3000")
              .AllowAnyHeader()
              .AllowAnyMethod();
    });
});

builder.Services.AddAuthorization();

var app = builder.Build();

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

app.UseHttpsRedirection();
app.UseCors("AllowNextJs");

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();

app.Run();