package dirs

import (
	"bytes"
	"flag"
	"testing"

	"github.com/anchore/go-testutils"
	"github.com/anchore/imgbom/imgbom/pkg"
	"github.com/sergi/go-diff/diffmatchpatch"
)

var update = flag.Bool("update", false, "update the *.golden files for json presenters")

func TestJsonPresenter(t *testing.T) {
	var buffer bytes.Buffer

	catalog := pkg.NewCatalog()

	// populate catalog with test data
	catalog.Add(pkg.Package{
		Name:    "package-1",
		Version: "1.0.1",
		Type:    pkg.DebPkg,
	})
	catalog.Add(pkg.Package{
		Name:    "package-2",
		Version: "2.0.1",
		Type:    pkg.DebPkg,
	})

	pres := NewPresenter(catalog, "/some/path")

	// run presenter
	err := pres.Present(&buffer)
	if err != nil {
		t.Fatal(err)
	}
	actual := buffer.Bytes()

	if *update {
		testutils.UpdateGoldenFileContents(t, actual)
	}

	var expected = testutils.GetGoldenFileContents(t)

	if !bytes.Equal(expected, actual) {
		dmp := diffmatchpatch.New()
		diffs := dmp.DiffMain(string(actual), string(expected), true)
		t.Errorf("mismatched output:\n%s", dmp.DiffPrettyText(diffs))
	}

}