<PackageReference Include="Asp.Versioning.Http" Version="8.*" />

<PackageReference Include="Asp.Versioning.Mvc.ApiExplorer" Version="8.*" />

builder.Services.AddApiVersioning(options =>
{
    options.DefaultApiVersion = new ApiVersion(1, 0);
    options.AssumeDefaultVersionWhenUnspecified = true;
    options.ReportApiVersions = true; // Adds api-supported-versions header
    options.ApiVersionReader = new UrlSegmentApiVersionReader();
});

var app = builder.Build();

var versionSet = app.NewApiVersionSet()
    .HasApiVersion(new ApiVersion(1, 0))
    .HasApiVersion(new ApiVersion(2, 0))
    .ReportApiVersions()
    .Build();

var v1 = app.MapGroup("/api/v{version:apiVersion}/products")
    .WithApiVersionSet(versionSet)
    .MapToApiVersion(new ApiVersion(1, 0));

var v2 = app.MapGroup("/api/v{version:apiVersion}/products")
    .WithApiVersionSet(versionSet)
    .MapToApiVersion(new ApiVersion(2, 0));

// V1: returns basic product info
v1.MapGet("/", async (AppDbContext db) =>
    TypedResults.Ok(await db.Products
        .Select(p => new ProductV1Dto(p.Id, p.Name, p.Price))
        .ToListAsync()));

// V2: returns extended product info with category
v2.MapGet("/", async (AppDbContext db) =>
    TypedResults.Ok(await db.Products
        .Select(p => new ProductV2Dto(p.Id, p.Name, p.Price, p.Category, p.CreatedAt))
        .ToListAsync()));

builder.Services.AddApiVersioning(options =>
{
    options.DefaultApiVersion = new ApiVersion(1, 0);
    options.AssumeDefaultVersionWhenUnspecified = true;
    options.ReportApiVersions = true;
    options.ApiVersionReader = new UrlSegmentApiVersionReader();
})
.AddMvc()
.AddApiExplorer(options =>
{
    options.GroupNameFormat = "'v'VVV"; // e.g., v1, v2
    options.SubstituteApiVersionInUrl = true;
});

// V1 controller
[ApiController]
[Route("api/v{version:apiVersion}/products")]
[ApiVersion("1.0")]
public sealed class ProductsController(AppDbContext db) : ControllerBase
{
    [HttpGet]
    public async Task<IActionResult> GetAll() =>
        Ok(await db.Products
            .Select(p => new ProductV1Dto(p.Id, p.Name, p.Price))
            .ToListAsync());
}

// V2 controller -- use explicit route, not [controller] token
[ApiController]
[Route("api/v{version:apiVersion}/products")]
[ApiVersion("2.0")]
public sealed class ProductsV2Controller(AppDbContext db) : ControllerBase
{
    [HttpGet]
    public async Task<IActionResult> GetAll() =>
        Ok(await db.Products
            .Select(p => new ProductV2Dto(p.Id, p.Name, p.Price, p.Category, p.CreatedAt))
            .ToListAsync());
}

builder.Services.AddApiVersioning(options =>
{
    options.DefaultApiVersion = new ApiVersion(1, 0);
    options.AssumeDefaultVersionWhenUnspecified = true;
    options.ReportApiVersions = true;
    options.ApiVersionReader = new HeaderApiVersionReader("X-Api-Version");
});

GET /api/products HTTP/1.1
Host: api.example.com
X-Api-Version: 2.0

builder.Services.AddApiVersioning(options =>
{
    options.DefaultApiVersion = new ApiVersion(1, 0);
    options.AssumeDefaultVersionWhenUnspecified = true;
    options.ReportApiVersions = true;
    options.ApiVersionReader = new QueryStringApiVersionReader("api-version");
});

GET /api/products?api-version=2.0 HTTP/1.1
Host: api.example.com

options.ApiVersionReader = ApiVersionReader.Combine(
    new UrlSegmentApiVersionReader(),
    new HeaderApiVersionReader("X-Api-Version"),
    new QueryStringApiVersionReader("api-version"));

builder.Services.AddApiVersioning(options =>
{
    options.DefaultApiVersion = new ApiVersion(2, 0);
    options.ReportApiVersions = true;
    options.Policies.Sunset(1.0)
        .Effective(new DateTimeOffset(2026, 6, 1, 0, 0, 0, TimeSpan.Zero))
        .Link("https://docs.example.com/api/migration-v1-to-v2")
            .Title("V1 to V2 Migration Guide")
            .Type("text/html");
});

api-supported-versions: 1.0, 2.0
api-deprecated-versions: 1.0
Sunset: Sun, 01 Jun 2026 00:00:00 GMT
Link: <https://docs.example.com/api/migration-v1-to-v2>; rel="sunset"; title="V1 to V2 Migration Guide"; type="text/html"

// Minimal APIs
var versionSet = app.NewApiVersionSet()
    .HasApiVersion(new ApiVersion(1, 0))
    .HasDeprecatedApiVersion(new ApiVersion(1, 0))
    .HasApiVersion(new ApiVersion(2, 0))
    .ReportApiVersions()
    .Build();

// MVC controllers
[ApiVersion("1.0", Deprecated = true)]
[ApiVersion("2.0")]
public sealed class ProductsController : ControllerBase { }