Program.cs

using FintechWallet.Data;
using FintechWallet.Repositories;
using FintechWallet.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using System.Text;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers();

// Configure EF Core with SQLite
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection")
    ?? "Data Source=WalletDB.db";
builder.Services.AddDbContext<WalletDbContext>(options =>
    options.UseSqlite(connectionString));

builder.Services.AddScoped(typeof(IRepository<>), typeof(Repository<>));
builder.Services.AddScoped<IAuthService, AuthService>();
builder.Services.AddScoped<IWalletService, WalletService>();
builder.Services.AddScoped<FintechWallet.Payments.PaymentFac>();

// Configure JWT Authentication
var jwtKey = builder.Configuration["Jwt:Key"] ?? "super_secret_key_that_is_long_enough_for_hmac256";
var keyBytes = Encoding.ASCII.GetBytes(jwtKey);

builder.Services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
    options.RequireHttpsMetadata = false;
    options.SaveToken = true;
    options.TokenValidationParameters = new TokenValidationParameters
    {
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(keyBytes),
        ValidateIssuer = false,
        ValidateAudience = false,
        ClockSkew = TimeSpan.Zero
    };
});

// Configure Swagger
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Ensure Database is Created
using (var scope = app.Services.CreateScope())
{
    var context = scope.ServiceProvider.GetRequiredService<WalletDbContext>();
    context.Database.EnsureCreated();
}

app.UseSwagger();
app.UseSwaggerUI();

app.UseHttpsRedirection();

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

app.MapControllers();

app.Run();