ThothII/tools/tht/internal/backup/create_test.go

package backup

import (
	"archive/tar"
	"archive/zip"
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"sort"
	"strings"
	"testing"
	"time"

	"github.com/aritmolab/thothii/tools/tht/internal/compose"
	"github.com/aritmolab/thothii/tools/tht/internal/config"
	"github.com/aritmolab/thothii/tools/tht/internal/lifecycle"
)

var requiredTestVolumes = []string{"settings", "pi-state", "workspace-registry", "workspace-secrets", "sessions", "qdrant-data", "embedding-models"}

func TestCreateWritesManifestLastWithConfigurationMetadataAndSevenVolumes(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	output := filepath.Join(t.TempDir(), "custom.zip")
	runner := newBackupRunner(fixture.installation, false)

	result, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, runner))
	if err != nil {
		t.Fatal(err)
	}
	if result.Path != output {
		t.Fatalf("Result.Path = %q, want %q", result.Path, output)
	}
	archive := readFixtureArchive(t, output)
	if got := archive.order[len(archive.order)-1]; got != ManifestPath {
		t.Fatalf("last archive entry = %q, want %q", got, ManifestPath)
	}
	if archive.manifest.InstallationID != fixture.installationID || archive.manifest.SourceRevision != testRevision || archive.manifest.ComposeProject != fixture.installation.ProjectName() {
		t.Fatalf("manifest identity = %#v", archive.manifest)
	}
	if len(archive.manifest.Volumes) != len(requiredTestVolumes) {
		t.Fatalf("manifest volumes = %d, want %d", len(archive.manifest.Volumes), len(requiredTestVolumes))
	}
	for _, logical := range requiredTestVolumes {
		path := "volumes/" + logical + ".tar"
		if _, exists := archive.files[path]; !exists {
			t.Errorf("archive is missing %s", path)
		}
	}
	for _, path := range []string{
		"configuration/installation/thothii-installation.yaml",
		"configuration/environment/operator.env",
		"configuration/pi/models.json",
		"configuration/pi/settings.json",
		"configuration/generated/current-image.yaml",
	} {
		if _, exists := archive.files[path]; !exists {
			t.Errorf("archive is missing %s", path)
		}
	}
	if len(archive.manifest.Images) < 2 {
		t.Fatalf("image identities = %#v", archive.manifest.Images)
	}
	if runner.streamWhileRunning {
		t.Fatal("a volume was streamed before the installation was stopped")
	}
}

func TestCreateRestartsAndVerifiesAnInstallationThatWasRunning(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, true)
	output := filepath.Join(t.TempDir(), "running.zip")

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, runner)); err != nil {
		t.Fatal(err)
	}
	if !runner.running || !runner.coreRunning || runner.maintenance {
		t.Fatalf("running state was not restored: running=%v core=%v maintenance=%v", runner.running, runner.coreRunning, runner.maintenance)
	}
	if runner.stopCount != 1 || runner.startCount != 1 || runner.healthChecks == 0 {
		t.Fatalf("lifecycle counts: stop=%d start=%d health=%d", runner.stopCount, runner.startCount, runner.healthChecks)
	}
}

func TestCreateRefusesActiveSessionsWithoutDrainAndRestoresAdmissions(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, true)
	runner.sessionResponses = []string{activeSessionPayload()}
	output := filepath.Join(t.TempDir(), "refused.zip")

	_, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, runner))
	if !errors.Is(err, ErrActiveSessions) {
		t.Fatalf("Create() error = %v, want ErrActiveSessions", err)
	}
	if runner.stopCount != 0 || !runner.running || runner.maintenance {
		t.Fatalf("refusal changed lifecycle state: stop=%d running=%v maintenance=%v", runner.stopCount, runner.running, runner.maintenance)
	}
	if _, statErr := os.Stat(output); !errors.Is(statErr, os.ErrNotExist) {
		t.Fatalf("unsafe backup was published: %v", statErr)
	}
}

func TestCreateDrainsActiveSessionsBeforeStoppedSnapshot(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, true)
	runner.sessionResponses = []string{activeSessionPayload(), activeSessionPayload(), `[]`}
	dependencies := testDependencies(t, runner)
	sleeps := 0
	dependencies.sleep = func(time.Duration) { sleeps++ }

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(t.TempDir(), "drained.zip"), Drain: true}, dependencies); err != nil {
		t.Fatal(err)
	}
	if sleeps == 0 || runner.streamWhileRunning {
		t.Fatalf("drain did not wait for a stopped snapshot: sleeps=%d streamedWhileRunning=%v", sleeps, runner.streamWhileRunning)
	}
}

func TestCreateDefaultPathUsesHomeInstallationIDUTCAndSourceRevision(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, false)
	dependencies := testDependencies(t, runner)
	home := t.TempDir()
	dependencies.homeDir = func() (string, error) { return home, nil }

	result, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{}, dependencies)
	if err != nil {
		t.Fatal(err)
	}
	wantDirectory := filepath.Join(home, ".thothii", "backups", fixture.installationID)
	if filepath.Dir(result.Path) != wantDirectory {
		t.Fatalf("default directory = %q, want %q", filepath.Dir(result.Path), wantDirectory)
	}
	name := filepath.Base(result.Path)
	for _, fragment := range []string{"20260816T081112Z", testRevision} {
		if !strings.Contains(name, fragment) {
			t.Errorf("default archive name %q does not contain %q", name, fragment)
		}
	}
}

func TestCreateCleansIncompleteArchiveAndRestoresRunningStateAfterStreamFailure(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, true)
	runner.failStreamAt = 3
	directory := t.TempDir()
	output := filepath.Join(directory, "failed.zip")

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, runner)); err == nil {
		t.Fatal("Create() succeeded after a volume stream failure")
	}
	if !runner.running || !runner.coreRunning || runner.maintenance {
		t.Fatalf("running state was not recovered: running=%v core=%v maintenance=%v", runner.running, runner.coreRunning, runner.maintenance)
	}
	assertNoBackupArtifacts(t, directory)
}

func TestCreateCleansIncompleteArchiveWhenVolumeHelperReportsANonzeroExit(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, false)
	runner.exitOnlyAt = 3
	directory := t.TempDir()

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(directory, "failed.zip")}, testDependencies(t, runner)); err == nil {
		t.Fatal("Create() succeeded after a nonzero volume-helper exit")
	}
	assertNoBackupArtifacts(t, directory)
}

func TestCreateCleansIncompleteArchiveAfterAtomicPublishFailure(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, false)
	directory := t.TempDir()
	dependencies := testDependencies(t, runner)
	dependencies.publishReserved = func(*archiveReservation, string) error { return errors.New("publish failed") }

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(directory, "failed.zip")}, dependencies); err == nil {
		t.Fatal("Create() succeeded after publish failure")
	}
	assertNoBackupArtifacts(t, directory)
}

func TestCreateDoesNotOverwriteOrDeleteAnOutputCreatedBeforeReservation(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, false)
	directory := t.TempDir()
	output := filepath.Join(directory, "race.zip")
	dependencies := testDependencies(t, runner)
	reserve := dependencies.reserveOutput
	dependencies.reserveOutput = func(path string) (*archiveReservation, error) {
		if err := os.WriteFile(path, []byte("created-by-another-process"), 0o600); err != nil {
			return nil, err
		}
		return reserve(path)
	}

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, dependencies); err == nil {
		t.Fatal("Create() succeeded after another process claimed the output path")
	}
	contents, err := os.ReadFile(output)
	if err != nil {
		t.Fatalf("racing output was removed: %v", err)
	}
	if got := string(contents); got != "created-by-another-process" {
		t.Fatalf("racing output = %q, want unchanged content", got)
	}
	entries, err := os.ReadDir(directory)
	if err != nil {
		t.Fatal(err)
	}
	if len(entries) != 1 || entries[0].Name() != "race.zip" {
		t.Fatalf("temporary backup artifacts remain after race: %v", entries)
	}
}

func TestCreateExcludesExternalSecretPayloadsByDefaultButRecordsDigests(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	runner := newBackupRunner(fixture.installation, false)
	output := filepath.Join(t.TempDir(), "no-external-secrets.zip")

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, runner)); err != nil {
		t.Fatal(err)
	}
	archive := readFixtureArchive(t, output)
	all := bytes.Join(mapValues(archive.files), nil)
	if bytes.Contains(all, []byte(fixture.secretValue)) {
		t.Fatal("default archive contains an external secret value")
	}
	secretReferences := 0
	workspaceSecrets := false
	for _, entry := range archive.manifest.Entries {
		if entry.Kind == EntrySecretReference {
			secretReferences++
			if entry.Archived || entry.SourcePath == "" || entry.SHA256 != DigestBytes([]byte(fixture.secretValue)) {
				t.Fatalf("secret reference = %#v", entry)
			}
		}
		if entry.Path == "volumes/workspace-secrets.tar" {
			workspaceSecrets = entry.Archived
		}
	}
	if secretReferences != 1 || !workspaceSecrets || archive.manifest.IncludesSecrets {
		t.Fatalf("secret behavior: references=%d workspace=%v includes=%v", secretReferences, workspaceSecrets, archive.manifest.IncludesSecrets)
	}
	if strings.Contains(strings.Join(runner.calls, "\n"), fixture.secretValue) {
		t.Fatal("external secret value appeared in a process argument")
	}
}

func TestCreateRequiresConfirmationToIncludeSecretsAndUsesOwnerOnlyMode(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	output := filepath.Join(t.TempDir(), "with-secrets.zip")
	request := CreateRequest{Output: output, IncludeSecrets: true}
	if _, err := createWithDependencies(context.Background(), fixture.installation, request, testDependencies(t, newBackupRunner(fixture.installation, false))); !errors.Is(err, ErrConfirmationRequired) {
		t.Fatalf("Create() error = %v, want ErrConfirmationRequired", err)
	}

	request.Confirm = true
	result, err := createWithDependencies(context.Background(), fixture.installation, request, testDependencies(t, newBackupRunner(fixture.installation, false)))
	if err != nil {
		t.Fatal(err)
	}
	if result.Warning == "" || strings.Contains(result.Warning, fixture.secretValue) {
		t.Fatalf("custody warning = %q", result.Warning)
	}
	info, err := os.Stat(output)
	if err != nil {
		t.Fatal(err)
	}
	if got := info.Mode().Perm(); got != 0o600 {
		t.Fatalf("archive mode = %#o, want 0600", got)
	}
	archive := readFixtureArchive(t, output)
	if !archive.manifest.IncludesSecrets || !bytes.Contains(bytes.Join(mapValues(archive.files), nil), []byte(fixture.secretValue)) {
		t.Fatal("confirmed archive does not include the external secret payload")
	}
}

func TestCreateRejectsInlineSecretValuesBeforeWritingAnArchive(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	fixture.environment = append(fixture.environment, "THT_LLM_API_KEY=must-never-enter-an-archive")
	fixture.writeEnvironment(t)
	directory := t.TempDir()
	runner := newBackupRunner(fixture.installation, false)

	_, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(directory, "unsafe.zip")}, testDependencies(t, runner))
	if err == nil || !strings.Contains(err.Error(), "inline secret") || strings.Contains(err.Error(), "must-never") {
		t.Fatalf("Create() error = %v, want value-free inline-secret refusal", err)
	}
	if len(runner.calls) != 0 {
		t.Fatalf("Docker was called before unsafe environment refusal: %v", runner.calls)
	}
	assertNoBackupArtifacts(t, directory)
}

func TestCreateRejectsInlineAuthorizationValuesBeforeWritingAnArchive(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	fixture.environment = append(fixture.environment, "DWH_AUTHORIZATION=must-never-enter-an-archive")
	fixture.writeEnvironment(t)
	directory := t.TempDir()
	runner := newBackupRunner(fixture.installation, false)

	_, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(directory, "unsafe.zip")}, testDependencies(t, runner))
	if err == nil || !strings.Contains(err.Error(), "inline secret") || strings.Contains(err.Error(), "must-never") {
		t.Fatalf("Create() error = %v, want value-free inline-secret refusal", err)
	}
	if len(runner.calls) != 0 {
		t.Fatalf("Docker was called before unsafe environment refusal: %v", runner.calls)
	}
	assertNoBackupArtifacts(t, directory)
}

func TestCreateIncludesServerPreservationRootsWithoutRecursingIntoBackupRoot(t *testing.T) {
	fixture := newBackupFixture(t, "server")
	for _, item := range []struct{ variable, name, value string }{
		{"THT_DATA_ROOT", "data", "session-state"},
		{"THT_PI_STATE_ROOT", "pi-state", "pi-state"},
		{"THT_WORKSPACE_REGISTRY_ROOT", "registry", "workspace-registry"},
	} {
		root := filepath.Join(fixture.root, item.name)
		if err := os.MkdirAll(root, 0o700); err != nil {
			t.Fatal(err)
		}
		if err := os.WriteFile(filepath.Join(root, "payload"), []byte(item.value), 0o600); err != nil {
			t.Fatal(err)
		}
		fixture.environment = append(fixture.environment, item.variable+"="+root)
	}
	backupRoot := filepath.Join(fixture.root, "existing-backups")
	if err := os.MkdirAll(backupRoot, 0o700); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(backupRoot, "old-secret-backup"), []byte("must-not-be-recursed"), 0o600); err != nil {
		t.Fatal(err)
	}
	fixture.environment = append(fixture.environment, "THT_BACKUP_ROOT="+backupRoot)
	fixture.writeEnvironment(t)
	output := filepath.Join(t.TempDir(), "server.zip")

	if _, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: output}, testDependencies(t, newBackupRunner(fixture.installation, false))); err != nil {
		t.Fatal(err)
	}
	archive := readFixtureArchive(t, output)
	all := bytes.Join(mapValues(archive.files), nil)
	for _, value := range []string{"session-state", "pi-state", "workspace-registry"} {
		if !bytes.Contains(all, []byte(value)) {
			t.Errorf("server preservation payload %q is missing", value)
		}
	}
	if bytes.Contains(all, []byte("must-not-be-recursed")) {
		t.Fatal("backup destination root was recursively included")
	}
}

func TestCreateHonorsTheSharedInstallationLifecycleLock(t *testing.T) {
	fixture := newBackupFixture(t, "local")
	lock, err := lifecycle.Acquire(fixture.installation)
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { _ = lock.Release() })
	runner := newBackupRunner(fixture.installation, false)

	_, err = createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(t.TempDir(), "locked.zip")}, testDependencies(t, runner))
	if !errors.Is(err, lifecycle.ErrLocked) {
		t.Fatalf("Create() error = %v, want lifecycle.ErrLocked", err)
	}
	if len(runner.calls) != 0 {
		t.Fatalf("Docker runner was called while lock was held: %v", runner.calls)
	}
}

func TestCreateRefusesMutableNonRunningServiceStates(t *testing.T) {
	for _, state := range []string{"paused", "restarting", "created", "removing"} {
		t.Run(state, func(t *testing.T) {
			fixture := newBackupFixture(t, "local")
			runner := newBackupRunner(fixture.installation, false)
			runner.serviceStates = map[string]string{"core": "running", "frontend": state}
			dependencies := testDependencies(t, runner)
			dependencies.sleep = func(time.Duration) { t.Fatal("unsafe service state reached the drain loop") }

			_, err := createWithDependencies(context.Background(), fixture.installation, CreateRequest{Output: filepath.Join(t.TempDir(), "unsafe.zip")}, dependencies)
			if err == nil || !strings.Contains(err.Error(), "not safely quiesced") {
				t.Fatalf("Create() error = %v, want unsafe service-state refusal", err)
			}
			if runner.stopCount != 0 || runner.streams != 0 {
				t.Fatalf("unsafe state was not refused before snapshot: stops=%d streams=%d", runner.stopCount, runner.streams)
			}
		})
	}
}

type backupFixture struct {
	root           string
	installationID string
	installation   config.Installation
	environment    []string
	secretValue    string
}

func newBackupFixture(t *testing.T, profile string) *backupFixture {
	t.Helper()
	temporaryRoot, err := filepath.EvalSymlinks(os.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	root, err := os.MkdirTemp(temporaryRoot, "tht-backup-")
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { _ = os.RemoveAll(root) })
	for _, directory := range []string{filepath.Join(root, "deploy", "pi"), filepath.Join(root, "deploy", "fixture")} {
		if err := os.MkdirAll(directory, 0o700); err != nil {
			t.Fatal(err)
		}
	}
	write := func(path, contents string) {
		if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	write(filepath.Join(root, "compose.yaml"), "services: {}\n")
	write(filepath.Join(root, "deploy", "compose."+profile+".yaml"), "services: {}\n")
	write(filepath.Join(root, "deploy", "pi", "models.json"), `{"providers":{}}`)
	write(filepath.Join(root, "deploy", "pi", "settings.json"), `{"enabledModels":[]}`)
	override := filepath.Join(root, "deploy", "fixture", "extra.yaml")
	write(override, "services: {}\n")
	installationID := profile + "-fixture"
	descriptorDirectory := filepath.Join(root, "deploy", installationID)
	if err := os.MkdirAll(descriptorDirectory, 0o700); err != nil {
		t.Fatal(err)
	}
	descriptor := filepath.Join(descriptorDirectory, "thothii-installation.yaml")
	environment := filepath.Join(descriptorDirectory, "operator.env")
	write(descriptor, "profile: "+profile+"\nprojectDirectory: "+root+"\nenvFile: "+environment+"\n")
	secretValue := "external-secret-value-for-backup-test"
	secretDirectory, err := os.MkdirTemp(temporaryRoot, "tht-backup-secret-")
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { _ = os.RemoveAll(secretDirectory) })
	secretPath := filepath.Join(secretDirectory, "external-secret")
	write(secretPath, secretValue)
	fixture := &backupFixture{
		root:           root,
		installationID: installationID,
		secretValue:    secretValue,
		environment: []string{
			"THT_WORKSPACE_INSTALLATION_ID=" + installationID,
			"THT_SECRETS_FILE=" + secretPath,
			"THT_WORKSPACE_GIT_REMOTE=https://git.example.invalid/workspaces.git",
			"THT_WORKSPACE_GIT_BRANCH=main",
		},
		installation: config.Installation{
			Path: descriptor, Profile: profile, ProjectDirectory: root, EnvFile: environment,
			Overrides: []string{override},
		},
	}
	fixture.writeEnvironment(t)
	currentImage := fixture.installation.CurrentImageOverridePath()
	if err := os.MkdirAll(filepath.Dir(currentImage), 0o700); err != nil {
		t.Fatal(err)
	}
	write(currentImage, "services:\n  core:\n    image: core:current\n")
	return fixture
}

func (fixture *backupFixture) writeEnvironment(t *testing.T) {
	t.Helper()
	if err := os.WriteFile(fixture.installation.EnvFile, []byte(strings.Join(fixture.environment, "\n")+"\n"), 0o600); err != nil {
		t.Fatal(err)
	}
}

type fakeBackupRunner struct {
	installation       config.Installation
	running            bool
	coreRunning        bool
	maintenance        bool
	sessionResponses   []string
	calls              []string
	streams            int
	failStreamAt       int
	exitOnlyAt         int
	streamWhileRunning bool
	stopCount          int
	startCount         int
	healthChecks       int
	serviceStates      map[string]string
}

func newBackupRunner(installation config.Installation, running bool) *fakeBackupRunner {
	return &fakeBackupRunner{installation: installation, running: running, coreRunning: running}
}

func (runner *fakeBackupRunner) Run(_ context.Context, args []string, _ io.Reader) (compose.Result, error) {
	command := strings.Join(args, " ")
	runner.calls = append(runner.calls, command)
	switch {
	case strings.Contains(command, " config --format json"):
		volumes := map[string]map[string]string{}
		for _, logical := range requiredTestVolumes {
			volumes[logical] = map[string]string{"name": runner.installation.ProjectName() + "_" + logical}
		}
		payload := map[string]any{
			"volumes": volumes,
			"services": map[string]any{
				"core":     map[string]any{"image": "thothii-core:test"},
				"frontend": map[string]any{"image": "thothii-frontend:test"},
			},
		}
		encoded, _ := json.Marshal(payload)
		return compose.Result{Stdout: string(encoded)}, nil
	case strings.HasPrefix(command, "volume inspect "):
		items := make([]map[string]any, 0, len(requiredTestVolumes))
		for _, logical := range requiredTestVolumes {
			items = append(items, map[string]any{
				"Name":   runner.installation.ProjectName() + "_" + logical,
				"Driver": "local",
				"Labels": map[string]string{"com.docker.compose.project": runner.installation.ProjectName(), "com.docker.compose.volume": logical},
			})
		}
		encoded, _ := json.Marshal(items)
		return compose.Result{Stdout: string(encoded)}, nil
	case strings.Contains(command, " images --format json"):
		return compose.Result{Stdout: "{\"Service\":\"core\",\"Repository\":\"thothii-core\",\"Tag\":\"test\",\"ID\":\"sha256:core\"}\n{\"Service\":\"frontend\",\"Repository\":\"thothii-frontend\",\"Tag\":\"test\",\"ID\":\"sha256:frontend\"}\n"}, nil
	case strings.Contains(command, " ps --all --format json"):
		runner.healthChecks++
		states := runner.serviceStates
		if states == nil {
			if runner.running {
				return compose.Result{Stdout: healthyServicesPayload()}, nil
			}
			return compose.Result{}, nil
		}
		services := make([]string, 0, len(states))
		for service := range states {
			services = append(services, service)
		}
		sort.Strings(services)
		lines := make([]string, 0, len(services))
		for _, service := range services {
			lines = append(lines, fmt.Sprintf(`{"Service":%q,"State":%q}`, service, states[service]))
		}
		return compose.Result{Stdout: strings.Join(lines, "\n")}, nil
	case strings.Contains(command, "/internal/maintenance/status"):
		return compose.Result{Stdout: fmt.Sprintf(`{"active":%t,"admissions":0,"recoveryRequired":false}`, runner.maintenance)}, nil
	case strings.Contains(command, "/internal/maintenance/activate"):
		runner.maintenance = true
		return compose.Result{Stdout: `{"active":true,"admissions":0,"recoveryRequired":false}`}, nil
	case strings.Contains(command, "/internal/maintenance/deactivate"):
		runner.maintenance = false
		return compose.Result{Stdout: `{"active":false,"admissions":0,"recoveryRequired":false}`}, nil
	case strings.Contains(command, "/sessions?scope="):
		if len(runner.sessionResponses) == 0 {
			return compose.Result{Stdout: `[]`}, nil
		}
		response := runner.sessionResponses[0]
		if len(runner.sessionResponses) > 1 {
			runner.sessionResponses = runner.sessionResponses[1:]
		}
		return compose.Result{Stdout: response}, nil
	case strings.HasSuffix(command, " stop"):
		runner.stopCount++
		runner.running, runner.coreRunning = false, false
		return compose.Result{}, nil
	case strings.HasSuffix(command, " start"):
		runner.startCount++
		runner.running, runner.coreRunning = true, true
		return compose.Result{}, nil
	case strings.Contains(command, " ps --all --format json"):
		runner.healthChecks++
		return compose.Result{Stdout: healthyServicesPayload()}, nil
	default:
		return compose.Result{}, fmt.Errorf("unexpected fake Docker command: %s", command)
	}
}

func (runner *fakeBackupRunner) Stream(_ context.Context, args []string, _ io.Reader, stdout io.Writer) (compose.Result, error) {
	runner.calls = append(runner.calls, strings.Join(args, " "))
	runner.streams++
	if runner.running {
		runner.streamWhileRunning = true
	}
	writer := tar.NewWriter(stdout)
	payload := []byte(fmt.Sprintf("volume-%d", runner.streams))
	if err := writer.WriteHeader(&tar.Header{Name: "payload", Mode: 0o600, Size: int64(len(payload))}); err != nil {
		return compose.Result{}, err
	}
	if _, err := writer.Write(payload); err != nil {
		return compose.Result{}, err
	}
	if err := writer.Close(); err != nil {
		return compose.Result{}, err
	}
	if runner.failStreamAt == runner.streams {
		return compose.Result{ExitCode: 1}, errors.New("fixture volume stream failed")
	}
	if runner.exitOnlyAt == runner.streams {
		return compose.Result{ExitCode: 1}, nil
	}
	return compose.Result{}, nil
}

func (runner *fakeBackupRunner) SessionInventoryScope() string {
	if runner.installation.Profile == "local" {
		return "mine"
	}
	return "all"
}

func testDependencies(t *testing.T, runner archiveRunner) dependencies {
	t.Helper()
	return dependencies{
		runner:          runner,
		now:             func() time.Time { return time.Date(2026, 8, 16, 8, 11, 12, 0, time.UTC) },
		homeDir:         func() (string, error) { return t.TempDir(), nil },
		revision:        func(context.Context, string) (string, error) { return testRevision, nil },
		sleep:           func(time.Duration) {},
		reserveOutput:   reserveArchiveOutput,
		publishReserved: publishReservedArchive,
	}
}

type fixtureArchive struct {
	order    []string
	files    map[string][]byte
	manifest Manifest
}

func readFixtureArchive(t *testing.T, path string) fixtureArchive {
	t.Helper()
	reader, err := zip.OpenReader(path)
	if err != nil {
		t.Fatal(err)
	}
	defer reader.Close()
	result := fixtureArchive{files: make(map[string][]byte)}
	for _, file := range reader.File {
		result.order = append(result.order, file.Name)
		opened, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		contents, err := io.ReadAll(opened)
		closeErr := opened.Close()
		if err != nil || closeErr != nil {
			t.Fatalf("read %s: %v / %v", file.Name, err, closeErr)
		}
		result.files[file.Name] = contents
	}
	if err := json.Unmarshal(result.files[ManifestPath], &result.manifest); err != nil {
		t.Fatalf("decode manifest: %v", err)
	}
	return result
}

func mapValues(values map[string][]byte) [][]byte {
	keys := make([]string, 0, len(values))
	for key := range values {
		keys = append(keys, key)
	}
	sort.Strings(keys)
	result := make([][]byte, 0, len(keys))
	for _, key := range keys {
		result = append(result, values[key])
	}
	return result
}

func activeSessionPayload() string {
	return `[{"status":"running","archived":false}]`
}

func healthyServicesPayload() string {
	return strings.Join([]string{
		`{"Service":"core","State":"running","Health":"healthy"}`,
		`{"Service":"frontend","State":"running","Health":"healthy"}`,
		`{"Service":"qdrant","State":"running","Health":"healthy"}`,
		`{"Service":"embedding","State":"running","Health":"healthy"}`,
		`{"Service":"embedding-model-init","State":"exited","ExitCode":0}`,
	}, "\n")
}

func assertNoBackupArtifacts(t *testing.T, directory string) {
	t.Helper()
	entries, err := os.ReadDir(directory)
	if err != nil {
		t.Fatal(err)
	}
	if len(entries) != 0 {
		names := make([]string, 0, len(entries))
		for _, entry := range entries {
			names = append(names, entry.Name())
		}
		t.Fatalf("incomplete backup artifacts remain: %v", names)
	}
}