package syftjson

import (
	"bytes"
	"context"
	"flag"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	stereoFile "github.com/anchore/stereoscope/pkg/file"
	"github.com/anchore/syft/internal"
	"github.com/anchore/syft/syft/artifact"
	"github.com/anchore/syft/syft/cpe"
	"github.com/anchore/syft/syft/file"
	"github.com/anchore/syft/syft/format/internal/testutil"
	"github.com/anchore/syft/syft/linux"
	"github.com/anchore/syft/syft/pkg"
	"github.com/anchore/syft/syft/sbom"
	"github.com/anchore/syft/syft/source"
)

var updateSnapshot = flag.Bool("update-json", false, "update the *.golden files for json encoders")
var updateImage = flag.Bool("update-image", false, "update the golden image used for image encoder testing")

func TestDefaultNameAndVersion(t *testing.T) {
	expectedID, expectedVersion := ID, internal.JSONSchemaVersion
	enc := NewFormatEncoder()
	if enc.ID() != expectedID {
		t.Errorf("expected ID %q, got %q", expectedID, enc.ID())
	}

	if enc.Version() != expectedVersion {
		t.Errorf("expected version %q, got %q", expectedVersion, enc.Version())
	}
}

func TestPrettyOutput(t *testing.T) {
	run := func(opt bool) string {
		enc, err := NewFormatEncoderWithConfig(EncoderConfig{
			Pretty: opt,
		})
		require.NoError(t, err)

		dir := t.TempDir()
		s := testutil.DirectoryInput(t, dir)

		var buffer bytes.Buffer
		err = enc.Encode(&buffer, s)
		require.NoError(t, err)

		return strings.TrimSpace(buffer.String())
	}

	t.Run("pretty", func(t *testing.T) {
		actual := run(true)
		assert.Contains(t, actual, "\n")
	})

	t.Run("compact", func(t *testing.T) {
		actual := run(false)
		assert.NotContains(t, actual, "\n")
	})
}

func TestEscapeHTML(t *testing.T) {
	dir := t.TempDir()
	s := testutil.DirectoryInput(t, dir)
	s.Artifacts.Packages.Add(pkg.Package{
		Name: "<html-package>",
	})

	// by default we do not escape HTML
	t.Run("default", func(t *testing.T) {
		cfg := DefaultEncoderConfig()

		enc, err := NewFormatEncoderWithConfig(cfg)
		require.NoError(t, err)

		var buffer bytes.Buffer
		err = enc.Encode(&buffer, s)
		require.NoError(t, err)

		actual := buffer.String()
		assert.Contains(t, actual, "<html-package>")
		assert.NotContains(t, actual, "\\u003chtml-package\\u003e")
	})
}

func TestDirectoryEncoder(t *testing.T) {
	cfg := DefaultEncoderConfig()
	cfg.Pretty = true
	enc, err := NewFormatEncoderWithConfig(cfg)
	require.NoError(t, err)

	dir := t.TempDir()
	testutil.AssertEncoderAgainstGoldenSnapshot(t,
		testutil.EncoderSnapshotTestConfig{
			Subject:                     testutil.DirectoryInput(t, dir),
			Format:                      enc,
			UpdateSnapshot:              *updateSnapshot,
			PersistRedactionsInSnapshot: true,
			IsJSON:                      true,
			Redactor:                    redactor(dir),
		},
	)
}

func TestImageEncoder(t *testing.T) {
	cfg := DefaultEncoderConfig()
	cfg.Pretty = true
	enc, err := NewFormatEncoderWithConfig(cfg)
	require.NoError(t, err)

	testImage := "image-simple"
	testutil.AssertEncoderAgainstGoldenImageSnapshot(t,
		testutil.ImageSnapshotTestConfig{
			Image:               testImage,
			UpdateImageSnapshot: *updateImage,
		},
		testutil.EncoderSnapshotTestConfig{
			Subject:                     testutil.ImageInput(t, testImage, testutil.FromSnapshot()),
			Format:                      enc,
			UpdateSnapshot:              *updateSnapshot,
			PersistRedactionsInSnapshot: true,
			IsJSON:                      true,
			Redactor:                    redactor(),
		},
	)
}

func TestEncodeFullJSONDocument(t *testing.T) {
	catalog := pkg.NewCollection()
	ctx := context.TODO()
	p1 := pkg.Package{
		Name:    "package-1",
		Version: "1.0.1",
		Locations: file.NewLocationSet(
			file.NewLocationFromCoordinates(file.Coordinates{
				RealPath: "/a/place/a",
			}),
		),
		Type:     pkg.PythonPkg,
		FoundBy:  "the-cataloger-1",
		Language: pkg.Python,
		Licenses: pkg.NewLicenseSet(pkg.NewLicenseWithContext(ctx, "MIT")),
		Metadata: pkg.PythonPackage{
			Name:    "package-1",
			Version: "1.0.1",
			Files:   []pkg.PythonFileRecord{},
		},
		PURL: "a-purl-1",
		CPEs: []cpe.CPE{
			cpe.Must("cpe:2.3:*:some:package:1:*:*:*:*:*:*:*", cpe.NVDDictionaryLookupSource),
		},
	}

	p2 := pkg.Package{
		Name:    "package-2",
		Version: "2.0.1",
		Locations: file.NewLocationSet(
			file.NewLocationFromCoordinates(file.Coordinates{
				RealPath: "/b/place/b",
			}),
		),
		Type:    pkg.DebPkg,
		FoundBy: "the-cataloger-2",
		Metadata: pkg.DpkgDBEntry{
			Package: "package-2",
			Version: "2.0.1",
			Files:   []pkg.DpkgFileRecord{},
		},
		PURL: "a-purl-2",
		CPEs: []cpe.CPE{
			cpe.Must("cpe:2.3:*:some:package:2:*:*:*:*:*:*:*", cpe.GeneratedSource),
		},
	}

	catalog.Add(p1)
	catalog.Add(p2)

	s := sbom.SBOM{
		Artifacts: sbom.Artifacts{
			Packages: catalog,
			FileMetadata: map[file.Coordinates]file.Metadata{
				file.NewVirtualLocation("/a/place", "/a/symlink/to/place").Coordinates: {
					FileInfo: stereoFile.ManualInfo{
						NameValue: "/a/place",
						ModeValue: 0775,
					},
					Type:    stereoFile.TypeDirectory,
					UserID:  0,
					GroupID: 0,
				},
				file.NewLocation("/a/place/a").Coordinates: {
					FileInfo: stereoFile.ManualInfo{
						NameValue: "/a/place/a",
						ModeValue: 0775,
					},
					Type:    stereoFile.TypeRegular,
					UserID:  0,
					GroupID: 0,
				},
				file.NewLocation("/b").Coordinates: {
					FileInfo: stereoFile.ManualInfo{
						NameValue: "/b",
						ModeValue: 0775,
					},
					Type:            stereoFile.TypeSymLink,
					LinkDestination: "/c",
					UserID:          0,
					GroupID:         0,
				},
				file.NewLocation("/b/place/b").Coordinates: {
					FileInfo: stereoFile.ManualInfo{
						NameValue: "/b/place/b",
						ModeValue: 0644,
					},
					Type:    stereoFile.TypeRegular,
					UserID:  1,
					GroupID: 2,
				},
			},
			FileDigests: map[file.Coordinates][]file.Digest{
				file.NewLocation("/a/place/a").Coordinates: {
					{
						Algorithm: "sha256",
						Value:     "366a3f5653e34673b875891b021647440d0127c2ef041e3b1a22da2a7d4f3703",
					},
				},
				file.NewLocation("/b/place/b").Coordinates: {
					{
						Algorithm: "sha256",
						Value:     "1b3722da2a7d90d033b87581a2a3f12021647445653e34666ef041e3b4f3707c",
					},
				},
			},
			FileContents: map[file.Coordinates]string{
				file.NewLocation("/a/place/a").Coordinates: "the-contents",
			},
			LinuxDistribution: &linux.Release{
				ID:        "redhat",
				Version:   "7",
				VersionID: "7",
				IDLike: []string{
					"rhel",
				},
			},
		},
		Relationships: []artifact.Relationship{
			{
				From: p1,
				To:   p2,
				Type: artifact.OwnershipByFileOverlapRelationship,
				Data: map[string]string{
					"file": "path",
				},
			},
		},
		Source: source.Description{
			ID: "c2b46b4eb06296933b7cf0722683964e9ecbd93265b9ef6ae9642e3952afbba0",
			Metadata: source.ImageMetadata{
				UserInput:      "user-image-input",
				ID:             "sha256:c2b46b4eb06296933b7cf0722683964e9ecbd93265b9ef6ae9642e3952afbba0",
				ManifestDigest: "sha256:2731251dc34951c0e50fcc643b4c5f74922dad1a5d98f302b504cf46cd5d9368",
				MediaType:      "application/vnd.docker.distribution.manifest.v2+json",
				Tags: []string{
					"stereoscope-fixture-image-simple:85066c51088bdd274f7a89e99e00490f666c49e72ffc955707cd6e18f0e22c5b",
				},
				Size: 38,
				Layers: []source.LayerMetadata{
					{
						MediaType: "application/vnd.docker.image.rootfs.diff.tar.gzip",
						Digest:    "sha256:3de16c5b8659a2e8d888b8ded8427be7a5686a3c8c4e4dd30de20f362827285b",
						Size:      22,
					},
					{
						MediaType: "application/vnd.docker.image.rootfs.diff.tar.gzip",
						Digest:    "sha256:366a3f5653e34673b875891b021647440d0127c2ef041e3b1a22da2a7d4f3703",
						Size:      16,
					},
				},
				RawManifest: []byte("eyJzY2hlbWFWZXJzaW9uIjoyLCJtZWRpYVR5cGUiOiJh..."),
				RawConfig:   []byte("eyJhcmNoaXRlY3R1cmUiOiJhbWQ2NCIsImNvbmZp..."),
				RepoDigests: []string{},
			},
		},
		Descriptor: sbom.Descriptor{
			Name:    "syft",
			Version: "v0.42.0-bogus",
			// the application configuration should be persisted here, however, we do not want to import
			// the application configuration in this package (it's reserved only for ingestion by the cmd package)
			Configuration: map[string]string{
				"config-key": "config-value",
			},
		},
	}

	cfg := DefaultEncoderConfig()
	cfg.Pretty = true
	enc, err := NewFormatEncoderWithConfig(cfg)
	require.NoError(t, err)

	testutil.AssertEncoderAgainstGoldenSnapshot(t,
		testutil.EncoderSnapshotTestConfig{
			Subject:                     s,
			Format:                      enc,
			UpdateSnapshot:              *updateSnapshot,
			PersistRedactionsInSnapshot: true,
			IsJSON:                      true,
			Redactor:                    redactor(),
		},
	)
}

func redactor(values ...string) testutil.Redactor {
	return testutil.NewRedactions().
		WithValuesRedacted(values...).
		WithPatternRedactors(
			map[string]string{
				// remove schema version (don't even show the key or value)
				`,?\s*"schema":\s*\{[^}]*}`: "",
			},
		)
}
