felhom-agent/internal/localapi/disks_test.go

package localapi

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"net/http"
	"strings"
	"sync"
	"testing"
	"time"

	"gitea.dooplex.hu/admin/felhom-agent/internal/hub"
	"gitea.dooplex.hu/admin/felhom-agent/internal/proxmox"
	"gitea.dooplex.hu/admin/felhom-agent/internal/storage"
)

// ---- fakes ------------------------------------------------------------------------------

type fakeDiskOps struct {
	mu           sync.Mutex
	probe        storage.DeviceProbe // returned by InspectDevice (Device filled per call)
	inspectErr   error
	formatCalls  []string
	mountCalls   []storage.MountSpec
	unmountCalls []string
}

func (f *fakeDiskOps) InspectDevice(_ context.Context, device string) (storage.DeviceProbe, error) {
	p := f.probe
	p.Device = device
	return p, f.inspectErr
}
func (f *fakeDiskOps) Format(_ context.Context, device, _ string) error {
	f.mu.Lock()
	f.formatCalls = append(f.formatCalls, device)
	f.mu.Unlock()
	return nil
}
func (f *fakeDiskOps) EnsureMount(_ context.Context, spec storage.MountSpec) error {
	f.mu.Lock()
	f.mountCalls = append(f.mountCalls, spec)
	f.mu.Unlock()
	return nil
}
func (f *fakeDiskOps) Unmount(_ context.Context, where string) error {
	f.mu.Lock()
	f.unmountCalls = append(f.unmountCalls, where)
	f.mu.Unlock()
	return nil
}
func (f *fakeDiskOps) formatted() []string { f.mu.Lock(); defer f.mu.Unlock(); return append([]string(nil), f.formatCalls...) }

type fakeGate struct {
	mu       sync.Mutex
	decision WipeDecision
	reqs     []WipeRequest
}

func (g *fakeGate) AuthorizeWipe(req WipeRequest) WipeDecision {
	g.mu.Lock()
	defer g.mu.Unlock()
	g.reqs = append(g.reqs, req)
	return g.decision
}
func (g *fakeGate) requests() []WipeRequest {
	g.mu.Lock()
	defer g.mu.Unlock()
	return append([]WipeRequest(nil), g.reqs...)
}

type fakeGuestList struct{ guests []proxmox.Guest }

func (f fakeGuestList) ListLXC(context.Context) ([]proxmox.Guest, error) { return f.guests, nil }

// fakeHostReader is a deterministic HostReader fixture for the role classifier: "/" lives on the
// whole disk /dev/sda, so SystemDisks resolves {/dev/sda} (sysKnown=true) and any storage backed by
// a different whole-disk (e.g. /dev/sdb1) classifies as user-data without touching the real host.
type fakeHostReader struct{ mounts []storage.Mount }

func (f fakeHostReader) Mounts() ([]storage.Mount, error)       { return f.mounts, nil }
func (f fakeHostReader) ResolveUUID(string) (string, bool)      { return "", false }
func (f fakeHostReader) DeviceExists(string) bool               { return true }
func (f fakeHostReader) Rotational(string) (bool, bool)         { return false, false }
func (f fakeHostReader) Removable(string) (bool, bool)          { return false, false }

// sysOnSDA is the default system-disk fixture (root on /dev/sda) used by the disk-server test helpers.
func sysOnSDA() fakeHostReader {
	return fakeHostReader{mounts: []storage.Mount{{Device: "/dev/sda1", MountPoint: "/"}}}
}

// newDiskServer builds a server wired with the 8C disk deps (token A → guest 8200).
func newDiskServer(t *testing.T, d *fakeDiskOps, g *fakeGate, sv StorageView, gl GuestLister) http.Handler {
	t.Helper()
	if sv == nil {
		sv = fakeStorage{}
	}
	srv, err := NewServer(Options{
		ListenAddr: "127.0.0.1:0",
		Guests:     &fakeGuests{},
		Backups:    &fakeBackups{},
		Store:      &fakeStore{},
		Storage:    sv,
		Tokens:     staticTokens{"A": 8200, "B": 9300},
		Disks:      d,
		DiskGate:   g,
		Guests2:    gl,
		HostReader: sysOnSDA(),
		Logger:     slog.New(slog.NewTextHandler(io.Discard, nil)),
	})
	if err != nil {
		t.Fatalf("new server: %v", err)
	}
	srv.baseCtx = context.Background()
	// [AGENT-001] The real anti-retarget re-resolution touches /dev/disk/by-*,
	// which doesn't exist in unit tests. Stub it to a successful re-resolve of the
	// device the format tests use; antiRetargetResolve itself is covered directly
	// in wipe_reresolve_test.go.
	srv.reresolveWipe = func(_ context.Context, _ string) (string, error) { return "/dev/sdb", nil }
	// F20-BUG2: the wipe id derivation hits /dev/disk/by-* in production; stub it deterministically so
	// both the /disks list and the gate (which share this seam) resolve the same id in tests.
	srv.deviceDurableID = func(device string) (string, error) { return "byid:wwn-" + strings.TrimPrefix(device, "/dev/"), nil }
	return srv.Handler()
}

// ---- the security centerpiece -----------------------------------------------------------

// A blank device (the agent's own probe says blank) is formatted — mkfs called, gate NOT consulted.
func TestFormat_BlankDevice_Formats(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true}} // blank: Probed, nothing set
	g := &fakeGate{}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4"}`)
	if w.Code != http.StatusOK {
		t.Fatalf("blank format: got %d want 200 (%s)", w.Code, w.Body.String())
	}
	if got := d.formatted(); len(got) != 1 || got[0] != "/dev/sdb" {
		t.Fatalf("mkfs not called for blank device: %v", got)
	}
	if len(g.requests()) != 0 {
		t.Fatal("gate was consulted for a blank-device format (should be benign)")
	}
}

// THE HEADLINE SECURITY TEST: a caller asks to format a DATA-BEARING device the gate tiers as
// SYSTEM/BACKUP (destructive). The gate refuses pending_signature, **mkfs is NEVER called**, and the
// response surfaces the operator-signature pending op (NOT a customer-confirmation prompt).
func TestFormat_DataBearing_ProtectedRole_RefusedNoMkfs(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true, HasFilesystem: true, FSType: "ext4"}}
	g := &fakeGate{decision: WipeDecision{Allowed: false, Tier: "destructive", Reason: "pending_signature"}}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4"}`)
	if w.Code != http.StatusForbidden {
		t.Fatalf("data-bearing protected format: got %d want 403", w.Code)
	}
	if got := d.formatted(); len(got) != 0 {
		t.Fatalf("mkfs WAS called on a protected data-bearing device — security invariant violated: %v", got)
	}
	if len(g.requests()) != 1 {
		t.Fatalf("gate not consulted for the destructive format: %v", g.requests())
	}
	if !strings.Contains(w.Body.String(), "operator signature") {
		t.Fatalf("response did not signal an operator signature is needed: %s", w.Body.String())
	}
}

// A hand-issued confirmed:true on a data-bearing device the gate tiers as SYSTEM/BACKUP is STILL
// refused (operator-signature) and mkfs is NOT called — role beats confirmation. (The gate's
// role-tiering is itself asserted in reconcile/gate_test; here we assert the handler honors a
// destructive verdict even when the caller claimed confirmed:true.)
func TestFormat_DataBearing_ConfirmedTrueButProtected_StillRefused(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true, HasFilesystem: true, FSType: "ext4"}}
	g := &fakeGate{decision: WipeDecision{Allowed: false, Tier: "destructive", Reason: "pending_signature"}}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4","confirmed":true,"durable_id":"byid:wwn-xyz"}`)
	if w.Code != http.StatusForbidden {
		t.Fatalf("confirmed-but-protected format: got %d want 403", w.Code)
	}
	if got := d.formatted(); len(got) != 0 {
		t.Fatalf("mkfs called despite protected role — confirmation must not beat role: %v", got)
	}
	// The handler must have forwarded the caller's confirmation claim to the gate (the gate, not the
	// handler, ignores it for protected roles).
	if reqs := g.requests(); len(reqs) != 1 || !reqs[0].Confirmed || reqs[0].ConfirmDurableID != "byid:wwn-xyz" {
		t.Fatalf("handler did not forward the confirmation claim to the gate: %+v", reqs)
	}
}

// USER-DATA + customer-confirmed (gate Allowed): the wipe proceeds — mkfs IS called, 200.
func TestFormat_DataBearing_UserDataConfirmed_Formats(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true, HasFilesystem: true, FSType: "ext4"}}
	g := &fakeGate{decision: WipeDecision{Allowed: true, Tier: "customer_confirmable", Reason: "customer_confirmed"}}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4","confirmed":true,"durable_id":"byuuid:abc"}`)
	if w.Code != http.StatusOK {
		t.Fatalf("user-data confirmed format: got %d want 200 (%s)", w.Code, w.Body.String())
	}
	if got := d.formatted(); len(got) != 1 || got[0] != "/dev/sdb" {
		t.Fatalf("mkfs not called for a customer-confirmed user-data wipe: %v", got)
	}
}

// USER-DATA + NOT yet confirmed (gate refuses pending_confirmation): 403 with needs_confirmation,
// mkfs NOT called, and NO operator-signature pending op (it's the customer's to confirm).
func TestFormat_DataBearing_UserDataNeedsConfirmation(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true, HasFilesystem: true, FSType: "ext4"}}
	g := &fakeGate{decision: WipeDecision{Allowed: false, Tier: "customer_confirmable", Reason: "pending_confirmation", NeedsConfirmation: true}}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4"}`)
	if w.Code != http.StatusForbidden {
		t.Fatalf("user-data unconfirmed: got %d want 403", w.Code)
	}
	if len(d.formatted()) != 0 {
		t.Fatal("mkfs called for an unconfirmed user-data wipe")
	}
	var resp struct {
		Data FormatResponse `json:"data"`
	}
	_ = json.Unmarshal(w.Body.Bytes(), &resp)
	if !resp.Data.NeedsConfirmation {
		t.Fatalf("response missing needs_confirmation: %s", w.Body.String())
	}
	if resp.Data.PendingOp != nil {
		t.Fatal("user-data refusal must NOT surface an operator-signature pending op")
	}
	if strings.Contains(w.Body.String(), "operator signature") {
		t.Fatalf("user-data refusal must not ask for an operator signature: %s", w.Body.String())
	}
}

// Fail-safe: a device the agent could NOT reliably inspect (Probed=false) is treated as
// data-bearing → routed through the gate, mkfs not called.
func TestFormat_AmbiguousProbe_TreatedDestructive(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: false}} // probe failed → DataBearing()=true
	g := &fakeGate{decision: WipeDecision{Allowed: false, Tier: "destructive", Reason: "pending_signature"}}
	h := newDiskServer(t, d, g, nil, nil)

	w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4"}`)
	if w.Code != http.StatusForbidden {
		t.Fatalf("ambiguous device: got %d want 403", w.Code)
	}
	if got := d.formatted(); len(got) != 0 {
		t.Fatalf("mkfs called on an unprobed device: %v", got)
	}
}

func TestFormat_RejectsBadDeviceOrFSType(t *testing.T) {
	d := &fakeDiskOps{probe: storage.DeviceProbe{Probed: true}}
	h := newDiskServer(t, d, &fakeGate{}, nil, nil)
	if w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/../etc","fstype":"ext4"}`); w.Code != http.StatusBadRequest {
		t.Fatalf("bad device: got %d want 400", w.Code)
	}
	if w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ntfs"}`); w.Code != http.StatusBadRequest {
		t.Fatalf("bad fstype: got %d want 400", w.Code)
	}
	if len(d.formatted()) != 0 {
		t.Fatal("formatted despite invalid input")
	}
}

// ---- assign / eject ---------------------------------------------------------------------

func TestAssign_EnsureMount(t *testing.T) {
	d := &fakeDiskOps{}
	h := newDiskServer(t, d, &fakeGate{}, nil, nil)
	w := do(t, h, "POST", "/disks/assign", "A", `{"uuid":"1234-ABCD","where":"/mnt/data","fstype":"ext4"}`)
	if w.Code != http.StatusOK {
		t.Fatalf("assign: got %d (%s)", w.Code, w.Body.String())
	}
	d.mu.Lock()
	defer d.mu.Unlock()
	if len(d.mountCalls) != 1 || d.mountCalls[0].Where != "/mnt/data" || d.mountCalls[0].UUID != "1234-ABCD" {
		t.Fatalf("EnsureMount not called correctly: %+v", d.mountCalls)
	}
}

func TestEject_UnmountAndDependents(t *testing.T) {
	d := &fakeDiskOps{}
	// storage view: USER-DATA target "bulk" (usb on a non-system disk) mounted at /mnt/bulk — the
	// role-gate permits ejecting it.
	sv := fakeStorage{targets: []hub.StorageTarget{{Name: "bulk", Type: hub.StorageTypeUSB, BackingDevice: "/dev/sdb1", MountPath: "/mnt/bulk"}}}
	// guest 8200 mounts storage "bulk"; guest 9300 does not
	gl := fakeGuestList{guests: []proxmox.Guest{{VMID: 8200}, {VMID: 9300}}}
	h := newDiskServerWithGuestConfigs(t, d, sv, gl, map[int]map[string]string{
		8200: {"mp0": "bulk:200,mp=/mnt/media,backup=0"},
		9300: {"mp0": "local-lvm:8,mp=/var,backup=1"},
	})

	w := do(t, h, "POST", "/disks/eject", "A", `{"where":"/mnt/bulk"}`)
	if w.Code != http.StatusOK {
		t.Fatalf("eject: got %d (%s)", w.Code, w.Body.String())
	}
	d.mu.Lock()
	unmounts := append([]string(nil), d.unmountCalls...)
	d.mu.Unlock()
	if len(unmounts) != 1 || unmounts[0] != "/mnt/bulk" {
		t.Fatalf("Unmount not called: %v", unmounts)
	}
	var resp struct {
		Data struct {
			DependentGuests []int `json:"dependent_guests"`
		} `json:"data"`
	}
	_ = json.Unmarshal(w.Body.Bytes(), &resp)
	found := false
	for _, v := range resp.Data.DependentGuests {
		if v == 8200 {
			found = true
		}
		if v == 9300 {
			t.Fatal("9300 listed as dependent but it does not mount bulk")
		}
	}
	if !found {
		t.Fatalf("dependent guest 8200 not reported: %v", resp.Data.DependentGuests)
	}
}

// A2 (security): the eject path is ROLE-GATED at the agent. A system mount (local dir on the OS disk)
// and a backup mount (PBS) are REFUSED 403 with NO Unmount; only a user-data mount ejects. The UI
// hiding the button is not the control — a direct API call to unmount a protected storage is refused.
func TestEject_RoleGated(t *testing.T) {
	sv := fakeStorage{targets: []hub.StorageTarget{
		{Name: "bulk", Type: hub.StorageTypeUSB, BackingDevice: "/dev/sdb1", MountPath: "/mnt/bulk"}, // user-data
		{Name: "local", Type: "local", MountPath: "/var/lib/vz"},                                     // system (builtin dir)
		{Name: "felhom-pbs", Type: hub.StorageTypePBS, MountPath: "/mnt/pbs"},                         // backup (PBS)
	}}

	// system mount → refused, no Unmount.
	d := &fakeDiskOps{}
	h := newDiskServer(t, d, &fakeGate{}, sv, nil)
	if w := do(t, h, "POST", "/disks/eject", "A", `{"where":"/var/lib/vz"}`); w.Code != http.StatusForbidden {
		t.Fatalf("eject system mount: got %d want 403 (%s)", w.Code, w.Body.String())
	}
	d.mu.Lock()
	if len(d.unmountCalls) != 0 {
		t.Fatalf("Unmount called on a system mount — role-gate bypassed: %v", d.unmountCalls)
	}
	d.mu.Unlock()

	// backup mount (PBS) → refused, no Unmount.
	d2 := &fakeDiskOps{}
	h2 := newDiskServer(t, d2, &fakeGate{}, sv, nil)
	if w := do(t, h2, "POST", "/disks/eject", "A", `{"where":"/mnt/pbs"}`); w.Code != http.StatusForbidden {
		t.Fatalf("eject backup mount: got %d want 403 (%s)", w.Code, w.Body.String())
	}
	d2.mu.Lock()
	if len(d2.unmountCalls) != 0 {
		t.Fatalf("Unmount called on a backup mount — role-gate bypassed: %v", d2.unmountCalls)
	}
	d2.mu.Unlock()

	// user-data mount → ejects (Unmount called once).
	d3 := &fakeDiskOps{}
	h3 := newDiskServer(t, d3, &fakeGate{}, sv, nil)
	if w := do(t, h3, "POST", "/disks/eject", "A", `{"where":"/mnt/bulk"}`); w.Code != http.StatusOK {
		t.Fatalf("eject user-data mount: got %d want 200 (%s)", w.Code, w.Body.String())
	}
	d3.mu.Lock()
	if len(d3.unmountCalls) != 1 || d3.unmountCalls[0] != "/mnt/bulk" {
		t.Fatalf("user-data eject did not Unmount /mnt/bulk: %v", d3.unmountCalls)
	}
	d3.mu.Unlock()

	// fail-safe: an unknown mount (no storage target) → refused, no Unmount.
	d4 := &fakeDiskOps{}
	h4 := newDiskServer(t, d4, &fakeGate{}, sv, nil)
	if w := do(t, h4, "POST", "/disks/eject", "A", `{"where":"/mnt/unknown"}`); w.Code != http.StatusForbidden {
		t.Fatalf("eject unresolvable mount: got %d want 403 (fail-safe) (%s)", w.Code, w.Body.String())
	}
	d4.mu.Lock()
	if len(d4.unmountCalls) != 0 {
		t.Fatalf("Unmount called on an unresolvable mount — fail-safe violated: %v", d4.unmountCalls)
	}
	d4.mu.Unlock()
}

// ---- guest data-drive passthrough (slice 10 P2) -----------------------------------------

type fakeGuestAttacher struct {
	mu    sync.Mutex
	calls []struct {
		vmid        int
		slot, where string
	}
	reboots  []int
	detaches []struct {
		vmid int
		slot string
	}
	attachDrives    []string // where passed to AttachDrive (intermediary model)
	detachDrives    []string // where passed to DetachDrive
	ensureParentN   int      // EnsureSharedParent call count
	attachDriveFail bool     // when set, AttachDrive returns an error
}

func (f *fakeGuestAttacher) AttachBind(_ context.Context, vmid int, mountKey, where string) error {
	f.mu.Lock()
	defer f.mu.Unlock()
	f.calls = append(f.calls, struct {
		vmid        int
		slot, where string
	}{vmid, mountKey, where})
	return nil
}
func (f *fakeGuestAttacher) count() int { f.mu.Lock(); defer f.mu.Unlock(); return len(f.calls) }

func (f *fakeGuestAttacher) AttachDrive(_ context.Context, _ int, where string) (string, error) {
	f.mu.Lock()
	defer f.mu.Unlock()
	if f.attachDriveFail {
		return "", fmt.Errorf("fake attach-drive failure")
	}
	f.attachDrives = append(f.attachDrives, where)
	return StablePathForRaw(where), nil
}
func (f *fakeGuestAttacher) GuestSeesMount(_ context.Context, _ int, _ string) bool { return true }
func (f *fakeGuestAttacher) attachDriveCount() int {
	f.mu.Lock()
	defer f.mu.Unlock()
	return len(f.attachDrives)
}

func (f *fakeGuestAttacher) DetachDrive(_ context.Context, where string) error {
	f.mu.Lock()
	defer f.mu.Unlock()
	f.detachDrives = append(f.detachDrives, where)
	return nil
}

func (f *fakeGuestAttacher) EnsureSharedParent(_ context.Context) error {
	f.mu.Lock()
	defer f.mu.Unlock()
	f.ensureParentN++
	return nil
}

func (f *fakeGuestAttacher) DetachBind(_ context.Context, vmid int, mountKey string) error {
	f.mu.Lock()
	defer f.mu.Unlock()
	f.detaches = append(f.detaches, struct {
		vmid int
		slot string
	}{vmid, mountKey})
	return nil
}
func (f *fakeGuestAttacher) detachCount() int {
	f.mu.Lock()
	defer f.mu.Unlock()
	return len(f.detaches)
}

func (f *fakeGuestAttacher) RebootGuest(_ context.Context, vmid int) error {
	f.mu.Lock()
	defer f.mu.Unlock()
	f.reboots = append(f.reboots, vmid)
	return nil
}
func (f *fakeGuestAttacher) rebootCount() int { f.mu.Lock(); defer f.mu.Unlock(); return len(f.reboots) }

func newAttachServer(t *testing.T, ga GuestAttacher, mounts map[int]map[string]string) http.Handler {
	t.Helper()
	srv, err := NewServer(Options{
		ListenAddr: "127.0.0.1:0", Guests: &fakeGuestsCfg{mounts: mounts}, Backups: &fakeBackups{},
		Store: &fakeStore{}, Storage: fakeStorage{}, Tokens: staticTokens{"A": 8200, "B": 9300},
		GuestAttach: ga, Logger: slog.New(slog.NewTextHandler(io.Discard, nil)),
	})
	if err != nil {
		t.Fatal(err)
	}
	srv.baseCtx = context.Background()
	return srv.Handler()
}

// Intermediary model: a guest-attach binds the drive's felhom-data under the shared parent (host-side)
// and returns its STABLE guest path — no pct slot. EnsureSharedParent runs first.
//
// COMPANION GUARD: the legacy `pct set -mpN` AttachBind must NOT be used in the intermediary model — a
// pre-fix impl that still called AttachBind would trip ga.count()!=0 here.
func TestGuestAttach_BindsUnderParent(t *testing.T) {
	ga := &fakeGuestAttacher{}
	h := newAttachServer(t, ga, map[int]map[string]string{
		8200: {"mp9": "/var/lib/.../bootstrap,mp=/etc/felhom-bootstrap,ro=1"},
	})
	w := do(t, h, "POST", "/disks/guest-attach", "A", `{"where":"/mnt/felhom-usb"}`)
	if w.Code != http.StatusOK {
		t.Fatalf("attach: got %d want 200 (%s)", w.Code, w.Body.String())
	}
	if ga.attachDriveCount() != 1 || ga.attachDrives[0] != "/mnt/felhom-usb" {
		t.Fatalf("AttachDrive not called with /mnt/felhom-usb: %+v", ga.attachDrives)
	}
	if ga.ensureParentN < 1 {
		t.Fatalf("EnsureSharedParent must run before binding the drive")
	}
	if !strings.Contains(w.Body.String(), `"guest_path":"/mnt/felhom-drives/felhom-usb"`) {
		t.Fatalf("response missing the stable guest_path: %s", w.Body.String())
	}
	if ga.count() != 0 {
		t.Fatalf("legacy pct AttachBind called (%d) — intermediary model must use host-side AttachDrive", ga.count())
	}
}

// An AttachDrive failure surfaces as 502 (no silent success).
func TestGuestAttach_AttachDriveFailure(t *testing.T) {
	ga := &fakeGuestAttacher{attachDriveFail: true}
	h := newAttachServer(t, ga, map[int]map[string]string{8200: {}})
	w := do(t, h, "POST", "/disks/guest-attach", "A", `{"where":"/mnt/felhom-usb"}`)
	if w.Code != http.StatusBadGateway {
		t.Fatalf("attach failure: got %d want 502 (%s)", w.Code, w.Body.String())
	}
}

// A hostile/invalid where is refused with no binder call.
func TestGuestAttach_RejectsBadPath(t *testing.T) {
	ga := &fakeGuestAttacher{}
	h := newAttachServer(t, ga, map[int]map[string]string{8200: {}})
	for _, bad := range []string{`{"where":"/mnt/../etc"}`, `{"where":"/etc/passwd"}`, `{"where":"/mnt/a/b"}`, `{"where":""}`} {
		if w := do(t, h, "POST", "/disks/guest-attach", "A", bad); w.Code != http.StatusBadRequest {
			t.Fatalf("bad where %s: got %d want 400", bad, w.Code)
		}
	}
	if ga.count() != 0 {
		t.Fatal("binder called for an invalid path")
	}
}

// Not configured (no GuestAttach dep) → 503.
func TestGuestAttach_NotConfigured(t *testing.T) {
	h := newAttachServer(t, nil, map[int]map[string]string{8200: {}})
	if w := do(t, h, "POST", "/disks/guest-attach", "A", `{"where":"/mnt/felhom-usb"}`); w.Code != http.StatusServiceUnavailable {
		t.Fatalf("unconfigured: got %d want 503", w.Code)
	}
}

// Guest reboot (activation) returns 202 and triggers RebootGuest for the token's vmid (detached).
func TestGuestReboot_Accepted(t *testing.T) {
	ga := &fakeGuestAttacher{}
	h := newAttachServer(t, ga, map[int]map[string]string{8200: {}})
	w := do(t, h, "POST", "/guest/reboot", "A", "")
	if w.Code != http.StatusAccepted {
		t.Fatalf("reboot: got %d want 202 (%s)", w.Code, w.Body.String())
	}
	// The reboot runs in a goroutine; give it a moment to record the call.
	for i := 0; i < 100 && ga.rebootCount() == 0; i++ {
		time.Sleep(time.Millisecond)
	}
	if ga.rebootCount() != 1 || ga.reboots[0] != 8200 {
		t.Fatalf("RebootGuest not invoked for vmid 8200: %+v", ga.reboots)
	}
}

// A cross-guest reboot (body vmid != token's) is refused 403, no reboot.
func TestGuestReboot_CrossGuest403(t *testing.T) {
	ga := &fakeGuestAttacher{}
	h := newAttachServer(t, ga, map[int]map[string]string{8200: {}})
	if w := do(t, h, "POST", "/guest/reboot", "A", `{"vmid":9300}`); w.Code != http.StatusForbidden {
		t.Fatalf("cross-guest reboot: got %d want 403", w.Code)
	}
	time.Sleep(5 * time.Millisecond)
	if ga.rebootCount() != 0 {
		t.Fatal("reboot triggered for a cross-guest request")
	}
}

// ---- auth / config ----------------------------------------------------------------------

func TestDisks_CrossGuest403(t *testing.T) {
	h := newDiskServer(t, &fakeDiskOps{probe: storage.DeviceProbe{Probed: true}}, &fakeGate{}, nil, nil)
	if w := do(t, h, "GET", "/disks?vmid=9300", "A", ""); w.Code != http.StatusForbidden {
		t.Fatalf("cross-guest /disks: got %d want 403", w.Code)
	}
	if w := do(t, h, "POST", "/disks/format", "A", `{"vmid":9300,"device":"/dev/sdb","fstype":"ext4"}`); w.Code != http.StatusForbidden {
		t.Fatalf("cross-guest format: got %d want 403", w.Code)
	}
}

func TestDisks_NotConfigured(t *testing.T) {
	// a server with no disk deps → 503 on disk endpoints
	srv, err := NewServer(Options{
		ListenAddr: "127.0.0.1:0", Guests: &fakeGuests{}, Backups: &fakeBackups{},
		Store: &fakeStore{}, Storage: fakeStorage{}, Tokens: staticTokens{"A": 8200},
		Logger: slog.New(slog.NewTextHandler(io.Discard, nil)),
	})
	if err != nil {
		t.Fatal(err)
	}
	srv.baseCtx = context.Background()
	h := srv.Handler()
	if w := do(t, h, "POST", "/disks/format", "A", `{"device":"/dev/sdb","fstype":"ext4"}`); w.Code != http.StatusServiceUnavailable {
		t.Fatalf("unconfigured format: got %d want 503", w.Code)
	}
}

// ---- helpers ----------------------------------------------------------------------------

// newDiskServerWithGuestConfigs is like newDiskServer but with a fakeGuests that returns the given
// per-vmid mount maps (so eject's dependent-scan can resolve).
func newDiskServerWithGuestConfigs(t *testing.T, d *fakeDiskOps, sv StorageView, gl GuestLister, mounts map[int]map[string]string) http.Handler {
	t.Helper()
	fg := &fakeGuestsCfg{mounts: mounts}
	srv, err := NewServer(Options{
		ListenAddr: "127.0.0.1:0", Guests: fg, Backups: &fakeBackups{}, Store: &fakeStore{},
		Storage: sv, Tokens: staticTokens{"A": 8200, "B": 9300},
		Disks: d, DiskGate: &fakeGate{}, Guests2: gl, HostReader: sysOnSDA(),
		Logger: slog.New(slog.NewTextHandler(io.Discard, nil)),
	})
	if err != nil {
		t.Fatal(err)
	}
	srv.baseCtx = context.Background()
	return srv.Handler()
}

// fakeGuestsCfg returns per-vmid mountpoints from GuestConfig.
type fakeGuestsCfg struct{ mounts map[int]map[string]string }

func (f *fakeGuestsCfg) GuestConfig(_ context.Context, vmid int) (proxmox.GuestConfig, error) {
	extra := map[string]json.RawMessage{}
	for k, v := range f.mounts[vmid] {
		b, _ := json.Marshal(v)
		extra[k] = b
	}
	return proxmox.GuestConfig{Extra: extra}, nil
}
func (f *fakeGuestsCfg) Snapshot(context.Context, int, string, string) (string, error) { return "", nil }
func (f *fakeGuestsCfg) Rollback(context.Context, int, string) (string, error)         { return "", nil }
func (f *fakeGuestsCfg) WaitTask(context.Context, string, proxmox.WaitOptions) (proxmox.TaskStatus, error) {
	return proxmox.TaskStatus{ExitStatus: "OK"}, nil
}