using Microsoft.AspNetCore.Mvc.RazorPages; // PageModel
using Packt.Shared; // NorthwindContext
using Microsoft.AspNetCore.Mvc; // [BindProperty], IActionResult

namespace Northwind.Web.Pages;

public class SuppliersModel : PageModel
{
  private NorthwindContext db;

  public SuppliersModel(NorthwindContext injectedContext)
  {
    db = injectedContext;
  }

  public IEnumerable<Supplier>? Suppliers { get; set; }

  public void OnGet()
  {
    ViewData["Title"] = "Northwind B2B - Suppliers";

    Suppliers = db.Suppliers
      .OrderBy(c => c.Country).ThenBy(c => c.CompanyName);
  }

  [BindProperty]
  public Supplier? Supplier { get; set; }

  public IActionResult OnPost()
  {
    if ((Supplier is not null) && ModelState.IsValid)
    {
      db.Suppliers.Add(Supplier);
      db.SaveChanges();
      return RedirectToPage("/suppliers");
    }
    else
    {
      return Page(); // return to original page
    }
  }
}