Program.cs

using Microsoft.OpenApi.Models;
using Microsoft.EntityFrameworkCore;
using Pizzastore.Models;


var builder = WebApplication.CreateBuilder(args);
var connectionString = builder.Configuration.GetConnectionString("Pizzas") ?? "Data Source=Pizzas.db";

builder.Services.AddEndpointsApiExplorer();

builder.Services.AddSqlite<PizzaDb>(connectionString);
// builder.Services.AddDbContext<PizzaDb>(options => options.UseInMemoryDatabase("items"));

builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo
    {
        Title = "Pizza Store",
        Description = "Making the pizza you love",
        Version = "v1"
    });
});

var app = builder.Build();

if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint("/swagger/v1/swagger.json", "Pizza Store API v1");
    });
}

app.MapGet("/", () => "Hello World!");

app.MapGet("/pizzas", async (PizzaDb db) => await db.Pizzas.ToListAsync());

app.MapPost("/pizza", async (PizzaDb db, Pizza pizza) =>
{
    await db.Pizzas.AddAsync(pizza);
    await db.SaveChangesAsync();
    return Results.Created($"/pizza/{pizza.Id}", pizza);
});

app.MapGet("/pizza/{id}", async (PizzaDb db, int id) => await db.Pizzas.FindAsync(id));


app.MapPut("/pizza/{id}", async (PizzaDb db, Pizza updatepizza, int id) =>
{
    var pizza = await db.Pizzas.FindAsync(id);
    if (pizza is null) return Results.NotFound();
    pizza.Name = updatepizza.Name;
    pizza.Description = updatepizza.Description;
    await db.SaveChangesAsync();
    return Results.NoContent();
});

app.MapDelete("/pizza/{id}", async (PizzaDb db, int id) =>
{
    var pizza = await db.Pizzas.FindAsync(id);
    if (pizza is null) return Results.NotFound();
    db.Pizzas.Remove(pizza);
    await db.SaveChangesAsync();
    return Results.Ok();   
});

app.Run();