package packages

import (
	"bytes"
	"flag"
	"testing"

	"github.com/anchore/stereoscope/pkg/filetree"

	"github.com/go-test/deep"

	"github.com/anchore/go-testutils"
	"github.com/anchore/stereoscope/pkg/imagetest"
	"github.com/anchore/syft/syft/pkg"
	"github.com/anchore/syft/syft/source"
	"github.com/sergi/go-diff/diffmatchpatch"
)

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

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

	testImage := "image-simple"

	catalog := pkg.NewCatalog()
	img := imagetest.GetFixtureImage(t, "docker-archive", testImage)

	_, ref1, _ := img.SquashedTree().File("/somefile-1.txt", filetree.FollowBasenameLinks)
	_, ref2, _ := img.SquashedTree().File("/somefile-2.txt", filetree.FollowBasenameLinks)

	// populate catalog with test data
	catalog.Add(pkg.Package{
		Name:    "package-1",
		Version: "1.0.1",
		Locations: []source.Location{
			source.NewLocationFromImage(string(ref1.RealPath), *ref1, img),
		},
		Type: pkg.DebPkg,
	})
	catalog.Add(pkg.Package{
		Name:    "package-2",
		Version: "2.0.1",
		Locations: []source.Location{
			source.NewLocationFromImage(string(ref2.RealPath), *ref2, img),
		},
		Type: pkg.DebPkg,
	})

	pres := NewTablePresenter(catalog)

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

	if *updateTablePresenterGoldenFiles {
		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))
	}
}

func TestRemoveDuplicateRows(t *testing.T) {
	data := [][]string{
		{"1", "2", "3"},
		{"a", "b", "c"},
		{"1", "2", "3"},
		{"a", "b", "c"},
		{"1", "2", "3"},
		{"4", "5", "6"},
		{"1", "2", "1"},
	}

	expected := [][]string{
		{"1", "2", "3"},
		{"a", "b", "c"},
		{"4", "5", "6"},
		{"1", "2", "1"},
	}

	actual := removeDuplicateRows(data)

	if diffs := deep.Equal(expected, actual); len(diffs) > 0 {
		t.Errorf("found diffs!")
		for _, d := range diffs {
			t.Errorf("   diff: %+v", d)
		}
	}

}