"regexp"
	"sort"
	"strings"
	"time"

	"github.com/spf13/pflag"
	"golang.org/x/tools/go/packages"
	"k8s.io/klog/v2"
	"sigs.k8s.io/yaml"
)

const (
	rulesFileName = ".import-restrictions"
	goModFile     = "go.mod"
)

func main() {
	klog.InitFlags(nil)
	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
	pflag.Parse()

	pkgs, err := loadPkgs(pflag.Args()...)
	if err != nil {

	err = TryProxies(func(proxy string) (err error) {
		data, err = Lookup(ctx, proxy, path).GoMod(ctx, rev)
		return err
	})
	return data, err
}

// GoModFile is like GoMod but returns the name of the file containing
// the cached information.
func GoModFile(ctx context.Context, path, version string) (string, error) {
	if !gover.ModIsValid(path, version) {
		return "", fmt.Errorf("invalid version %q", version)
	}

func DownloadModule(ctx context.Context, m *ModuleJSON) error {
	var err error
	_, file, err := modfetch.InfoFile(ctx, m.Path, m.Version)
	if err != nil {
		return err
	}
	m.Info = file
	m.GoMod, err = modfetch.GoModFile(ctx, m.Path, m.Version)
	if err != nil {
		return err
	}
	m.GoModSum, err = modfetch.GoModSum(ctx, m.Path, m.Version)
	if err != nil {
		return err
	}