Program.cs

using LibraryAppRestapi;
using LibraryAppRestapi.Data;
using LibraryAppRestapi.IRepository;
using Microsoft.EntityFrameworkCore;
using LibraryAppRestapi.Repository;
using System.Text.Json.Serialization;
using LibraryAppRestapi.UnitOfWorkk;
using LibraryAppRestapi.Models;
using Microsoft.OpenApi.Models;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using Swashbuckle.AspNetCore.Filters;
using System.Text;

var MyAllowSpecificOrigins = "_myAllowSpecificOrigins";

var builder = WebApplication.CreateBuilder(args);

//cors
builder.Services.AddCors(options =>
{
    options.AddPolicy(MyAllowSpecificOrigins,
                          policy =>
                          {
                              policy.WithOrigins("http://localhost:5173/"
                                                  )
                                                  .AllowAnyOrigin()
                                                  .AllowAnyMethod()
                                                  .AllowAnyHeader()
                                                  ;
                          });
});

// Add services to the container.

builder.Services.AddControllers();
//Populate data into db 
builder.Services.AddTransient<Seed>();
builder.Services.AddControllers().AddJsonOptions(x =>
                x.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles);
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();
builder.Services.AddScoped<IBookRepository, BookRepository>();
builder.Services.AddScoped<IStudentRepository, StudentRepository>();
builder.Services.AddScoped<IAuthorRepository, AuthorRepository>();
builder.Services.AddScoped<IPublisherRepository, PublisherRepository>();
builder.Services.AddScoped<IIssueRecordRepository,IssueRecordRepository>();
builder.Services.AddScoped<IUserRepository, UserRepository>();


builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(options =>
{
    options.AddSecurityDefinition("oauth2", new OpenApiSecurityScheme
    {
        Description = "Standard Authorization header using the Bearer scheme (\"bearer {token}\")",
        In = ParameterLocation.Header,
        Name = "Authorization",
        Type = SecuritySchemeType.ApiKey
    });

    options.OperationFilter<SecurityRequirementsOperationFilter>();
});

builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuerSigningKey = true,
            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8
                .GetBytes(builder.Configuration.GetSection("AppSettings:Token").Value)),
            ValidateIssuer = false,
            ValidateAudience = false
        };
    });
//builder.Services.AddCors(options => options.AddPolicy(name: "NgOrigins",
//    policy =>
//    {
//        policy.WithOrigins("http://localhost:4200").AllowAnyMethod().AllowAnyHeader();
//    }));

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

var app = builder.Build();

if (args.Length == 1 && args[0].ToLower() == "seeddata")
    SeedData(app);

void SeedData(IHost app)
{
    var scopedFactory = app.Services.GetService<IServiceScopeFactory>();

    using (var scope = scopedFactory.CreateScope())
    {
        var service = scope.ServiceProvider.GetService<Seed>();
        service.SeedDataContext();
    }
}

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

app.UseCors("_myAllowSpecificOrigins");

app.UseHttpsRedirection();

app.UseAuthentication();

app.UseAuthorization();

app.MapControllers();

app.Run();