package store

import (
	"encoding/json"
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"orchestra/internal/authz"
	"orchestra/internal/domain"
)

func created(id string) domain.Event {
	b, _ := json.Marshal(map[string]any{"source": "jsonl", "external_id": "42", "project": "demo", "capability": []string{"mechanical"}})
	return domain.Event{ID: id, Type: "TaskCreated", TaskID: "task-1", Version: 1, Payload: b, Surface: string(authz.System)}
}

func TestLeaseCarriesReleasedHandoffRef(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	b := []byte(`{"source":"s","external_id":"x","project":"p"}`)
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: b, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "h", time.Minute); err != nil {
		t.Fatal(err)
	}
	ref, err := s.PutArtifact([]byte("handoff"))
	if err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("t")
	p, _ := json.Marshal(map[string]any{"handoff_ref": ref, "anchor_sha": "0123456789012345678901234567890123456789", "harness_id": task.Lease.HarnessID, "lease_epoch": task.Lease.Epoch, "expected_version": task.Version})
	if err := s.Append(domain.Event{ID: "release", Type: "TaskReleased", TaskID: "t", Version: task.Version + 1, Payload: p, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	e, err := s.Lease("t", "h", time.Minute)
	if err != nil {
		t.Fatal(err)
	}
	var got map[string]any
	if err := json.Unmarshal(e.Payload, &got); err != nil {
		t.Fatal(err)
	}
	if got["handoff_ref"] != ref {
		t.Fatalf("handoff_ref=%v want %s", got["handoff_ref"], ref)
	}
}

func TestRenewLeaseRequiresCurrentOwnerAndVersion(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"renew","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "worker-a", time.Minute); err != nil {
		t.Fatal(err)
	}
	before, _ := s.Task("t")
	if _, err := s.RenewLease("t", "worker-b", before.Lease.Epoch, before.Version, time.Hour); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("other worker renewal = %v, want conflict", err)
	}
	if _, err := s.RenewLease("t", "worker-a", before.Lease.Epoch, before.Version-1, time.Hour); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("stale renewal = %v, want conflict", err)
	}
	e, err := s.RenewLease("t", "worker-a", before.Lease.Epoch, before.Version, time.Hour)
	if err != nil {
		t.Fatal(err)
	}
	after, _ := s.Task("t")
	if e.Type != "TaskLeaseRenewed" || after.Version != before.Version+1 || after.Lease == nil || !after.Lease.Until.After(before.Lease.Until) {
		t.Fatalf("renewal was not projected: before=%+v after=%+v event=%+v", before, after, e)
	}
	if _, err := s.RenewLease("t", "worker-a", before.Lease.Epoch, before.Version, time.Hour); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("replayed renewal = %v, want conflict", err)
	}
}

func TestLeaseEpochFencesStaleOwnerLifecycleWrites(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"epoch","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "worker", time.Minute); err != nil {
		t.Fatal(err)
	}
	first, _ := s.Task("t")
	ref, err := s.PutArtifact([]byte("handoff"))
	if err != nil {
		t.Fatal(err)
	}
	staleRelease, _ := json.Marshal(map[string]any{"handoff_ref": ref, "anchor_sha": strings.Repeat("a", 40), "harness_id": "worker", "lease_epoch": "stale", "expected_version": first.Version})
	if err := s.Append(domain.Event{ID: "stale-release", Type: "TaskReleased", TaskID: "t", Version: first.Version + 1, Payload: staleRelease, Surface: string(authz.System)}); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("stale release = %v, want conflict", err)
	}
	release, _ := json.Marshal(map[string]any{"handoff_ref": ref, "anchor_sha": strings.Repeat("a", 40), "harness_id": "worker", "lease_epoch": first.Lease.Epoch, "expected_version": first.Version})
	if err := s.Append(domain.Event{ID: "release", Type: "TaskReleased", TaskID: "t", Version: first.Version + 1, Payload: release, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "worker", time.Minute); err != nil {
		t.Fatal(err)
	}
	second, _ := s.Task("t")
	if second.Lease.Epoch == first.Lease.Epoch {
		t.Fatal("re-lease reused fencing epoch")
	}
	report, err := s.PutArtifact([]byte("report"))
	if err != nil {
		t.Fatal(err)
	}
	staleComplete, _ := json.Marshal(map[string]any{"report_ref": report, "receipt": map[string]any{"consumed": 1}, "harness_id": "worker", "lease_epoch": first.Lease.Epoch, "expected_version": second.Version})
	if err := s.Append(domain.Event{ID: "stale-complete", Type: "TaskCompleted", TaskID: "t", Version: second.Version + 1, Payload: staleComplete, Surface: string(authz.System)}); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("stale completion = %v, want conflict", err)
	}
}

func TestNeedsAttentionRetainsFencedLeaseForLateCompletion(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"attention","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "worker", time.Hour); err != nil {
		t.Fatal(err)
	}
	leased, _ := s.Task("t")
	attention, _ := json.Marshal(map[string]any{"blocker": "prompt response uncertain", "block_reason": "lease_failure", "harness_id": leased.Lease.HarnessID, "lease_epoch": leased.Lease.Epoch, "expected_version": leased.Version})
	if err := s.Append(domain.Event{ID: "attention", Type: "TaskNeedsAttention", TaskID: "t", Version: leased.Version + 1, Payload: attention, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	current, _ := s.Task("t")
	if current.State != domain.StateNeedsAttention || current.Lease == nil || current.Lease.Epoch != leased.Lease.Epoch {
		t.Fatalf("attention revoked or replaced lease: %+v", current)
	}
	report, err := s.PutArtifact([]byte("late completion"))
	if err != nil {
		t.Fatal(err)
	}
	completion, _ := json.Marshal(map[string]any{"report_ref": report, "receipt": map[string]any{"consumed": 1}, "harness_id": current.Lease.HarnessID, "lease_epoch": current.Lease.Epoch, "expected_version": current.Version})
	if err := s.Append(domain.Event{ID: "late-complete", Type: "TaskCompleted", TaskID: "t", Version: current.Version + 1, Payload: completion, Surface: string(authz.System)}); err != nil {
		t.Fatalf("late completion from retained owner: %v", err)
	}
	completed, _ := s.Task("t")
	if completed.State != domain.StateCompleted || completed.Lease != nil {
		t.Fatalf("late completion did not settle task: %+v", completed)
	}
}

func TestReclaimPersistsAttemptAndBackoffAcrossReopen(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"retry","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("t", "worker", time.Hour); err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("t")
	at := time.Date(2026, 7, 30, 12, 0, 0, 0, time.UTC)
	p, _ := json.Marshal(map[string]any{"reason": "lease_expired", "failure_class": "worker_lost", "harness_id": task.Lease.HarnessID, "lease_epoch": task.Lease.Epoch, "expected_version": task.Version})
	if err := s.Append(domain.Event{ID: "reclaim", Type: "TaskReleased", TaskID: "t", Version: task.Version + 1, At: at, Payload: p, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	got, _ := s.Task("t")
	if got.Attempt != 1 || got.FailureClass != "worker_lost" || !got.NextRetryAt.Equal(at.Add(time.Minute)) {
		t.Fatalf("reclaim projection=%+v", got)
	}
	reopened, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	got, _ = reopened.Task("t")
	if got.Attempt != 1 || !got.NextRetryAt.Equal(at.Add(time.Minute)) {
		t.Fatalf("reopen lost retry state: %+v", got)
	}
}

func TestOpenRebuildsOnlyFromLogAndIgnoresCorruptSnapshot(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("create")); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "snapshot.json"), []byte(`not json`), 0600); err != nil {
		t.Fatal(err)
	}
	restarted, err := Open(dir)
	if err != nil {
		t.Fatalf("corrupt disposable snapshot prevented log recovery: %v", err)
	}
	if task, ok := restarted.Task("task-1"); !ok || task.State != domain.StateQueued {
		t.Fatalf("log projection = %#v, present=%v", task, ok)
	}
}

func TestSchedulingAndQuotaIndexesReplayFromEvents(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("indexed")); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("task-1", "h1", time.Hour); err != nil {
		t.Fatal(err)
	}
	snapshot := s.SchedulingSnapshot()
	if got := snapshot.ActiveLeases["h1"]; got != 1 {
		t.Fatalf("active lease index=%d, want 1", got)
	}
	now := time.Now().UTC()
	report := func(at time.Time, consumed float64, known bool) {
		payload, _ := json.Marshal(map[string]any{"harness_id": "h1", "consumed": consumed, "known": known})
		if err := s.Append(domain.Event{ID: domain.NewID(), Type: "QuotaReported", TaskID: "quota", Version: 1, At: at, Payload: payload, Surface: string(authz.System)}); err != nil {
			t.Fatal(err)
		}
	}
	// Deliberately append out of timestamp order: the index must answer the
	// rolling query by receipt time, not event sequence.
	report(now, 4, true)
	report(now.Add(-2*time.Hour), 3, true)
	report(now.Add(-time.Hour), 1, false)
	if used, known := s.QuotaSince("h1", now.Add(-90*time.Minute)); used != 5 || known {
		t.Fatalf("indexed quota=(%v,%v), want (5,false)", used, known)
	}
	if used, known := s.QuotaSince("h1", now.Add(-30*time.Minute)); used != 4 || !known {
		t.Fatalf("recent indexed quota=(%v,%v), want (4,true)", used, known)
	}
	reopened, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if got := reopened.SchedulingSnapshot().ActiveLeases["h1"]; got != 1 {
		t.Fatalf("replayed active lease index=%d, want 1", got)
	}
	if used, known := reopened.QuotaSince("h1", now.Add(-90*time.Minute)); used != 5 || known {
		t.Fatalf("replayed indexed quota=(%v,%v), want (5,false)", used, known)
	}
}

func TestReplayLegacyLeaseDerivesNonRenewableFence(t *testing.T) {
	dir := t.TempDir()
	until := time.Now().Add(time.Hour).UnixNano()
	events := []domain.Event{
		{SchemaVersion: 2, Seq: 1, ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"legacy","project":"p"}`), Surface: string(authz.System)},
		{SchemaVersion: 2, Seq: 2, ID: "lease", Type: "TaskLeased", TaskID: "t", Version: 2, Payload: []byte(`{"harness_id":"worker","until_ns":` + fmt.Sprint(until) + `,"expected_version":1}`), Surface: string(authz.System)},
	}
	f, err := os.Create(filepath.Join(dir, "events.jsonl"))
	if err != nil {
		t.Fatal(err)
	}
	for _, e := range events {
		b, _ := json.Marshal(e)
		if _, err := f.Write(append(b, '\n')); err != nil {
			_ = f.Close()
			t.Fatal(err)
		}
	}
	if err := f.Close(); err != nil {
		t.Fatal(err)
	}
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("t")
	if task.Lease == nil || task.Lease.Epoch != "legacy:lease" {
		t.Fatalf("legacy lease fence = %#v", task.Lease)
	}
	if _, err := s.RenewLease("t", "worker", "", task.Version, time.Hour); !errors.Is(err, domain.ErrConflict) {
		t.Fatalf("legacy lease renewed without derived fence: %v", err)
	}
}

func TestBlockedTaskProjectsStructuredDiagnosisAndLegacyFallback(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"blocked","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	payload := []byte(`{"blocker":"worker is offline","block_reason":"worker_offline","pane_id":"p1","harness_id":"w1","pane_state":"unreachable"}`)
	if err := s.Append(domain.Event{ID: "blocked", Type: "TaskBlocked", TaskID: "t", Version: 2, Payload: payload, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("t")
	if task.BlockReason != domain.BlockReasonWorkerOffline || task.LastPaneID != "p1" || task.PaneState != "unreachable" {
		t.Fatalf("blocked diagnosis was not projected: %+v", task)
	}
	if got := domain.InferBlockReason("handoff validation failed"); got != domain.BlockReasonHandoffValidation {
		t.Fatalf("legacy fallback=%q", got)
	}
}

func TestTerminalSessionEvidenceSurvivesSessionCleanup(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{ID: "create", Type: "TaskCreated", TaskID: "t", Version: 1, Payload: []byte(`{"source":"s","external_id":"evidence","project":"p"}`), Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	ref, err := s.PutArtifact([]byte("report"))
	if err != nil {
		t.Fatal(err)
	}
	payload := []byte(`{"report_ref":"` + ref + `","receipt":{"source":"worker"},"session_evidence":{"pane_id":"w:p1","harness_id":"worker-1","pane_state":"open","source":"worker","captured_at":"2026-07-29T12:00:00Z","checked_at":"2026-07-29T12:00:01Z"}}`)
	if err := s.Append(domain.Event{ID: "complete", Type: "TaskCompleted", TaskID: "t", Version: 2, Payload: payload, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("t")
	if task.LastSession.PaneID != "w:p1" || task.LastSession.Source != "worker" || task.LastSession.CapturedAt.IsZero() || task.LastHarness != "worker-1" {
		t.Fatalf("terminal session evidence was lost: %+v", task)
	}
}

func TestAppendReplayAndDeduplicate(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e1")); err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e2")); !errors.Is(err, domain.ErrDuplicate) {
		t.Fatalf("expected ErrDuplicate, got %v", err)
	}
	if got := len(s.Events(0)); got != 1 {
		t.Fatalf("duplicate ingest appended %d events", got)
	}
	ref, err := s.PutArtifact([]byte("report"))
	if err != nil {
		t.Fatal(err)
	}
	completion, _ := json.Marshal(map[string]any{"report_ref": ref, "receipt": map[string]any{"harness_id": "h", "consumed": 1}})
	if err := s.Append(domain.Event{Type: "TaskCompleted", TaskID: "task-1", Version: 2, Payload: completion, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if err := s.Append(domain.Event{Type: "TaskReleased", TaskID: "task-1", Version: 2, Surface: string(authz.System), Payload: json.RawMessage(`{"handoff_ref":"` + ref + `","anchor_sha":"0123456789012345678901234567890123456789"}`)}); err != domain.ErrConflict {
		t.Fatalf("expected conflict, got %v", err)
	}
	s2, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if got := s2.Tasks()[0].State; got != domain.StateCompleted {
		t.Fatalf("replay state = %s", got)
	}
	if _, err := os.Stat(filepath.Join(dir, "snapshot.json")); err != nil {
		t.Fatal(err)
	}
}

// TestTaskAmendedAppliesAllFields guards S7: the projection previously only
// applied "title" from a TaskAmended payload, silently discarding due,
// description, and inherent_priority amendments even though they were
// accepted and logged.
func TestTaskAmendedAppliesAllFields(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e1")); err != nil {
		t.Fatal(err)
	}
	amend, _ := json.Marshal(map[string]any{
		"title":             "new title",
		"description":       "new description",
		"inherent_priority": 5.0,
		"due":               "2026-08-01T00:00:00Z",
	})
	if err := s.Append(domain.Event{Type: "TaskAmended", TaskID: "task-1", Version: 2, Payload: amend, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	tk := s.Tasks()[0]
	if tk.Title != "new title" || tk.Description != "new description" || tk.InherentPriority != 5 {
		t.Fatalf("unexpected task after amendment: %+v", tk)
	}
	if tk.Due == nil || !tk.Due.Equal(time.Date(2026, 8, 1, 0, 0, 0, 0, time.UTC)) {
		t.Fatalf("unexpected due after amendment: %+v", tk.Due)
	}
}

// TestTaskCorrected guards S8: the spec (§3.1) requires corrections to be
// compensating events appended on top of a wrong one, never an edit of the
// log — a wrongly-emitted terminal state (e.g. a mistaken TaskFailed) must be
// repairable by appending a new event that references the one it corrects,
// with both surviving in the replayed log.
func TestTaskCorrected(t *testing.T) {
	dir := t.TempDir()
	s, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e1")); err != nil {
		t.Fatal(err)
	}
	failPayload, _ := json.Marshal(map[string]any{"reason": "mistaken failure"})
	failEvt := domain.Event{ID: "e2", Type: "TaskFailed", TaskID: "task-1", Version: 2, Payload: failPayload, Surface: string(authz.System)}
	if err := s.Append(failEvt); err != nil {
		t.Fatal(err)
	}
	if tk := s.Tasks()[0]; tk.State != domain.StateFailed {
		t.Fatalf("expected failed, got %s", tk.State)
	}

	// Referencing an unknown event is rejected.
	badCorrection, _ := json.Marshal(map[string]any{"corrects": "does-not-exist", "state": "queued"})
	if err := s.Append(domain.Event{Type: "TaskCorrected", TaskID: "task-1", Version: 3, Payload: badCorrection, Surface: string(authz.System)}); !errors.Is(err, domain.ErrInvalid) {
		t.Fatalf("expected ErrInvalid for unknown corrects target, got %v", err)
	}

	correction, _ := json.Marshal(map[string]any{"corrects": "e2", "state": "queued"})
	if err := s.Append(domain.Event{ID: "e3", Type: "TaskCorrected", TaskID: "task-1", Version: 3, Payload: correction, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	tk := s.Tasks()[0]
	if tk.State != domain.StateQueued {
		t.Fatalf("expected correction to restore queued state, got %s", tk.State)
	}

	// Replay from disk still applies both the wrong event and its correction
	// (the snapshot only elides already-applied events from Events(), never
	// from the durable log itself).
	s2, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	if tk2 := s2.Tasks()[0]; tk2.State != domain.StateQueued {
		t.Fatalf("expected replayed state queued, got %s", tk2.State)
	}
}

// TestLeaseAndExpireEventIDsAreUnique guards S5: Event.ID was set to the
// task id in both Lease and ExpireLeases, so every lease of the same task
// produced a TaskLeased/TaskReleased event with a colliding ID — unsound
// for ApplyAdvisory or any future ID-based lookup.
func TestLeaseAndExpireEventIDsAreUnique(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e1")); err != nil {
		t.Fatal(err)
	}
	task := s.Tasks()[0]
	leaseEvt, err := s.Lease(task.ID, "h1", time.Millisecond)
	if err != nil {
		t.Fatal(err)
	}
	if leaseEvt.ID == task.ID || leaseEvt.ID == "" {
		t.Fatalf("lease event ID %q collides with task ID %q", leaseEvt.ID, task.ID)
	}
	time.Sleep(2 * time.Millisecond)
	expired, err := s.ExpireLeases(time.Now())
	if err != nil {
		t.Fatal(err)
	}
	if len(expired) != 1 {
		t.Fatalf("expected 1 expiry, got %d", len(expired))
	}
	if expired[0].ID == task.ID || expired[0].ID == leaseEvt.ID || expired[0].ID == "" {
		t.Fatalf("expiry event ID %q collides", expired[0].ID)
	}
}

// TestTaskBySourceResolvesDuplicate covers the S6 fix: a caller that gets
// ErrDuplicate from Append must be able to look up the already-ingested
// task by its dedup key instead of guessing at "the last event in the log".
func TestTaskBySourceResolvesDuplicate(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("e1")); err != nil {
		t.Fatal(err)
	}
	want := s.Tasks()[0]
	if err := s.Append(created("e2")); !errors.Is(err, domain.ErrDuplicate) {
		t.Fatalf("expected ErrDuplicate, got %v", err)
	}
	got, ok := s.TaskBySource("jsonl", "42")
	if !ok || got.ID != want.ID {
		t.Fatalf("TaskBySource = %+v, ok=%v, want %+v", got, ok, want)
	}
	if _, ok := s.TaskBySource("jsonl", "does-not-exist"); ok {
		t.Fatal("expected not found")
	}
}

func TestArtifactIsContentAddressed(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	h1, err := s.PutArtifact([]byte("proof"))
	if err != nil {
		t.Fatal(err)
	}
	h2, err := s.PutArtifact([]byte("proof"))
	if err != nil {
		t.Fatal(err)
	}
	if h1 != h2 {
		t.Fatal("same artifact received different hashes")
	}
	if _, err := os.Stat(filepath.Join(s.cas, h1)); err != nil {
		t.Fatal(err)
	}
}

func TestLifecycleEventsRequireEvidence(t *testing.T) {
	cases := []struct {
		name string
		typ  string
		body string
	}{
		{"release", "TaskReleased", `{}`},
		{"complete", "TaskCompleted", `{}`},
		{"block", "TaskBlocked", `{}`},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			err := domain.ValidateEvent(domain.Event{Type: tc.typ, TaskID: "task-1", Version: 1, Payload: json.RawMessage(tc.body), Surface: string(authz.System)})
			if err == nil {
				t.Fatal("expected lifecycle evidence validation error")
			}
		})
	}
}

// TestAppendEnforcesAuthorizationAtTheBus proves authorization is checked
// once at the append boundary (spec §7.1/§1.4), not only in HTTP handlers:
// a caller writing to the store directly with a notify-only surface, or with
// no declared surface at all, is rejected exactly like an HTTP request would
// be — there is no in-process bypass for the router, coordinator, or a
// provider adapter that forgets to declare who it's acting as.
func TestAppendEnforcesAuthorizationAtTheBus(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	b, _ := json.Marshal(map[string]any{"source": "jsonl", "external_id": "1", "project": "demo"})

	// A notify-only surface (e.g. Telegram) must never be able to create a
	// task by calling the store directly, even though it bypasses HTTP.
	if err := s.Append(domain.Event{ID: "e1", Type: "TaskCreated", TaskID: "task-1", Version: 1, Payload: b, Surface: string(authz.Telegram)}); err == nil {
		t.Fatal("notify-only surface created a task via direct store access")
	}

	// An internal producer that forgets to declare a surface is rejected,
	// not silently trusted as the plane.
	if err := s.Append(domain.Event{ID: "e2", Type: "TaskCreated", TaskID: "task-1", Version: 1, Payload: b}); err == nil {
		t.Fatal("event with no declared surface was accepted")
	}

	// The plane (router/coordinator/provider) authorizes as System and
	// succeeds.
	if err := s.Append(domain.Event{ID: "e3", Type: "TaskCreated", TaskID: "task-1", Version: 1, Payload: b, Surface: string(authz.System)}); err != nil {
		t.Fatalf("system surface rejected: %v", err)
	}
}

func TestExpectedVersionIsCheckedForEveryWriter(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("create")); err != nil {
		t.Fatal(err)
	}
	p := json.RawMessage(`{"reason":"rotate","expected_version":0}`)
	err = s.Append(domain.Event{Type: "TaskReleased", TaskID: "task-1", Version: 2, Payload: p, Surface: string(authz.System)})
	if err != domain.ErrConflict {
		t.Fatalf("expected CAS conflict, got %v", err)
	}
}

func TestReleaseTransactionSurvivesReLeaseUntilMatchingPickup(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	if err := s.Append(created("create")); err != nil {
		t.Fatal(err)
	}
	leased, err := s.Lease("task-1", "predecessor", time.Minute)
	if err != nil {
		t.Fatal(err)
	}
	ref, err := s.PutArtifact([]byte("handoff"))
	if err != nil {
		t.Fatal(err)
	}
	anchor := strings.Repeat("a", 40)
	first, _ := s.Task("task-1")
	p, _ := json.Marshal(map[string]any{"handoff_ref": ref, "anchor_sha": anchor, "transaction_id": "tx-1", "harness_id": first.Lease.HarnessID, "lease_epoch": first.Lease.Epoch, "expected_version": leased.Version})
	if err := s.Append(domain.Event{ID: "release", Type: "TaskReleased", TaskID: "task-1", Version: leased.Version + 1, Payload: p, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if _, err := s.Lease("task-1", "successor", time.Minute); err != nil {
		t.Fatal(err)
	}
	task, _ := s.Task("task-1")
	if task.ReleaseTransaction != "tx-1" || task.ReleaseAnchor != anchor || task.HandoffRef != ref {
		t.Fatalf("re-lease lost transaction: %+v", task)
	}
	p, _ = json.Marshal(map[string]any{"transaction_id": "tx-1", "handoff_ref": ref, "anchor_sha": anchor, "harness_id": "successor", "lease_epoch": task.Lease.Epoch, "lease_version": task.Version, "expected_version": task.Version})
	if err := s.Append(domain.Event{ID: "pickup", Type: "TaskPickupValidated", TaskID: "task-1", Version: task.Version + 1, Payload: p, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	task, _ = s.Task("task-1")
	if task.PickupTransaction != "tx-1" || task.PickupLeaseVersion != 4 {
		t.Fatalf("pickup not bound to transaction/epoch: %+v", task)
	}
}

// An empty window is observable zero consumption, not missing data. Reporting
// it as unknown made the router refuse every harness that had a configured
// quota limit and no receipt history, which no first lease could ever produce.
func TestQuotaSinceReportsEmptyWindowAsKnownZero(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	now := time.Now().UTC()
	if used, known := s.QuotaSince("fresh", now.Add(-fiveHours)); used != 0 || !known {
		t.Fatalf("never-reported harness quota=(%v,%v), want (0,true)", used, known)
	}
	payload, _ := json.Marshal(map[string]any{"harness_id": "h1", "consumed": 7.0, "known": true})
	if err := s.Append(domain.Event{ID: domain.NewID(), Type: "QuotaReported", TaskID: "quota", Version: 1, At: now.Add(-24 * time.Hour), Payload: payload, Surface: string(authz.System)}); err != nil {
		t.Fatal(err)
	}
	if used, known := s.QuotaSince("h1", now.Add(-fiveHours)); used != 0 || !known {
		t.Fatalf("receipts only outside the window quota=(%v,%v), want (0,true)", used, known)
	}
	if used, known := s.QuotaSince("h1", now.Add(-48*time.Hour)); used != 7 || !known {
		t.Fatalf("receipts inside the window quota=(%v,%v), want (7,true)", used, known)
	}
}

const fiveHours = 5 * time.Hour