Program.cs

using DailyLedgerSystem.Data;
using DailyLedgerSystem.Models;
using DailyLedgerSystem.Services;
using Hangfire;
using Hangfire.SqlServer;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

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

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

builder.Services.AddIdentity<ApplicationUser, IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();

builder.Services.ConfigureApplicationCookie(options =>
{
    options.LoginPath = "/Account/Login";
    options.AccessDeniedPath = "/Account/AccessDenied";
});

// Hangfire
builder.Services.AddHangfire(config =>
{
    config.SetDataCompatibilityLevel(CompatibilityLevel.Version_180);

    config.UseSimpleAssemblyNameTypeSerializer();

    config.UseRecommendedSerializerSettings();

    config.UseSqlServerStorage(
        builder.Configuration.GetConnectionString("DefaultConnection"),
        new SqlServerStorageOptions
        {
            CommandBatchMaxTimeout = TimeSpan.FromMinutes(5),
            SlidingInvisibilityTimeout = TimeSpan.FromMinutes(5),
            QueuePollInterval = TimeSpan.Zero,
            UseRecommendedIsolationLevel = true,
            DisableGlobalLocks = true
        });
});

builder.Services.AddHangfireServer();

builder.Services.AddScoped<IMonthlyBillService, MonthlyBillService>();
builder.Services.AddScoped<IEmailService, EmailService>();
builder.Services.AddScoped<IPdfService, PdfService>();
builder.Services.AddScoped<IExcelExportService, ExcelExportService>();
builder.Services.AddScoped<IAutoBillSchedulerService, AutoBillSchedulerService>();
builder.Services.AddScoped<ISettingsService, SettingsService>();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

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

// Hangfire Dashboard
app.UseHangfireDashboard("/hangfire");

// Auto Monthly Billing Scheduler
RecurringJob.AddOrUpdate<IAutoBillSchedulerService>(
    "auto-monthly-billing",
    service => service.GenerateMonthlyBillsAsync(),
    Cron.Monthly(1, 9) // Every month 1st day 9 AM
);

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Dashboard}/{action=Index}/{id?}");

using (var scope = app.Services.CreateScope())
{
    await DbInitializer.SeedAdminAsync(scope.ServiceProvider);
}

app.Run();