package sync

import (
	"archive/zip"
	"bytes"
	"context"
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/Rain-kl/Wavelet/internal/apps/agent/nginx"
	"github.com/Rain-kl/Wavelet/internal/apps/agent/protocol"
	"github.com/Rain-kl/Wavelet/internal/apps/agent/state"
)

type fakeExecutor struct {
	testErr   error
	reloadErr error
}

func testPagesSourceConfigJSON(deploymentID uint, checksum string) string {
	return fmt.Sprintf(`{"routes":[{"id":1,"site_name":"pages","domain":"pages.example.com","domains":["pages.example.com"],"origin_url":"openflare-pages://project/1","upstreams":["openflare-pages://project/1"],"enabled":true,"upstream_type":"pages","pages_deployment":{"project_id":1,"project_slug":"pages","deployment_id":%d,"deployment_number":1,"checksum":"%s","entry_file":"index.html","spa_fallback_enabled":true,"local_root":"__OPENFLARE_PAGES_DIR__/deployments/%d/current"}}],"openresty_config":{"worker_processes":"auto","worker_connections":1024,"worker_rlimit_nofile":65535,"events_multi_accept_enabled":true,"keepalive_timeout":20,"keepalive_requests":1000,"client_header_timeout":15,"client_body_timeout":15,"client_max_body_size":"64m","large_client_header_buffers":"4 16k","send_timeout":30,"proxy_connect_timeout":3,"proxy_send_timeout":60,"proxy_read_timeout":60,"websocket_enabled":true,"proxy_request_buffering":false,"proxy_buffering_enabled":true,"proxy_buffers":"16 16k","proxy_buffer_size":"8k","proxy_busy_buffers_size":"64k","gzip_enabled":true,"gzip_min_length":1024,"gzip_comp_level":5,"cache_enabled":false,"cache_levels":"1:2","cache_inactive":"30m","cache_max_size":"1g","cache_key_template":"$scheme$host$request_uri","cache_lock_enabled":true,"cache_lock_timeout":"5s","cache_use_stale":"error timeout updating http_500 http_502 http_503 http_504","main_config_template":"worker_processes {{OpenRestyWorkerProcesses}};"},"waf":{"rule_groups":[],"bindings":[]}}`, deploymentID, checksum, deploymentID)
}

type fakeClient struct {
	config        protocol.ActiveConfigResponse
	reports       []protocol.ApplyLogPayload
	pagesPackages map[uint][]byte
	pagesHashes   map[uint]string
	fetchCalls    int
	hashCalls     int
}

type fakeManager struct {
	applyOutcome       nginx.ApplyOutcome
	currentChecksum    string
	currentChecksumErr error
	ensureErr          error
	fallbackErr        error
	ensureCalls        []bool
	fallbackReasons    []string
	applyMainContents  []string
	applyRouteContents []string
	applyFiles         [][]protocol.SupportFile
}

func testSourceConfigJSON(workerProcesses string, listen int) string {
	return fmt.Sprintf(`{"routes":[{"id":1,"site_name":"example","domain":"example.com","domains":["example.com"],"origin_url":"http://127.0.0.1:%d","upstreams":["http://127.0.0.1:%d"],"enabled":true}],"openresty_config":{"worker_processes":"%s","worker_connections":1024,"worker_rlimit_nofile":65535,"events_multi_accept_enabled":true,"keepalive_timeout":20,"keepalive_requests":1000,"client_header_timeout":15,"client_body_timeout":15,"client_max_body_size":"64m","large_client_header_buffers":"4 16k","send_timeout":30,"proxy_connect_timeout":3,"proxy_send_timeout":60,"proxy_read_timeout":60,"websocket_enabled":true,"proxy_request_buffering":false,"proxy_buffering_enabled":true,"proxy_buffers":"16 16k","proxy_buffer_size":"8k","proxy_busy_buffers_size":"64k","gzip_enabled":true,"gzip_min_length":1024,"gzip_comp_level":5,"cache_enabled":false,"cache_levels":"1:2","cache_inactive":"30m","cache_max_size":"1g","cache_key_template":"$scheme$host$request_uri","cache_lock_enabled":true,"cache_lock_timeout":"5s","cache_use_stale":"error timeout updating http_500 http_502 http_503 http_504","main_config_template":"worker_processes {{OpenRestyWorkerProcesses}};"},"waf":{"rule_groups":[],"bindings":[]}}`, listen, listen, workerProcesses)
}

func (f *fakeExecutor) Test(ctx context.Context) error {
	return f.testErr
}

func (f *fakeExecutor) Reload(ctx context.Context) error {
	return f.reloadErr
}

func (f *fakeExecutor) EnsureRuntime(ctx context.Context, recreate bool) error {
	return nil
}

func (f *fakeExecutor) CheckHealth(ctx context.Context) error {
	return f.testErr
}

func (f *fakeExecutor) Restart(ctx context.Context) error {
	return f.reloadErr
}

func (f *fakeClient) GetActiveConfig(ctx context.Context) (*protocol.ActiveConfigResponse, error) {
	f.fetchCalls++
	return &f.config, nil
}

func (f *fakeClient) GetPagesDeploymentHash(ctx context.Context, deploymentID uint) (string, error) {
	f.hashCalls++
	if f.pagesHashes != nil {
		if hash, ok := f.pagesHashes[deploymentID]; ok {
			return hash, nil
		}
	}
	if f.pagesPackages != nil {
		if packageBytes, ok := f.pagesPackages[deploymentID]; ok {
			return testBytesChecksum(packageBytes), nil
		}
	}
	return "", fmt.Errorf("missing Pages hash %d", deploymentID)
}

func (f *fakeClient) DownloadPagesDeploymentPackage(ctx context.Context, deploymentID uint) ([]byte, error) {
	if f.pagesPackages == nil {
		return nil, fmt.Errorf("missing Pages package %d", deploymentID)
	}
	return f.pagesPackages[deploymentID], nil
}

func (f *fakeClient) ReportApplyLog(ctx context.Context, payload protocol.ApplyLogPayload) error {
	f.reports = append(f.reports, payload)
	return nil
}

func (f *fakeClient) SyncWAFIPGroups(ctx context.Context, payload protocol.WAFIPGroupSyncRequest) (*protocol.WAFIPGroupSyncResponse, error) {
	return &protocol.WAFIPGroupSyncResponse{}, nil
}

func (m *fakeManager) Apply(ctx context.Context, mainConfig string, routeConfig string, supportFiles []protocol.SupportFile) nginx.ApplyOutcome {
	m.applyMainContents = append(m.applyMainContents, mainConfig)
	m.applyRouteContents = append(m.applyRouteContents, routeConfig)
	m.applyFiles = append(m.applyFiles, append([]protocol.SupportFile(nil), supportFiles...))
	if m.applyOutcome.Status == "" {
		return nginx.ApplyOutcome{Status: nginx.ApplyStatusSuccess}
	}
	return m.applyOutcome
}

func (m *fakeManager) EnsureRuntime(ctx context.Context, recreate bool) error {
	m.ensureCalls = append(m.ensureCalls, recreate)
	return m.ensureErr
}

func (m *fakeManager) EnsureSafeFallbackRuntime(ctx context.Context, reason string) error {
	m.fallbackReasons = append(m.fallbackReasons, reason)
	return m.fallbackErr
}

func (m *fakeManager) CurrentChecksum() (string, error) {
	return m.currentChecksum, m.currentChecksumErr
}

func (m *fakeManager) WAFIPGroupChecksums() (map[string]string, error) {
	return map[string]string{}, nil
}

func (m *fakeManager) SyncWAFIPGroups(groups []protocol.WAFIPGroup) error {
	return nil
}

func (m *fakeManager) EnsureWorkerReadAccess() error {
	return nil
}

func TestSyncOnceSuccess(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-001",
			Checksum:         "checksum-1",
			SourceConfigJSON: testSourceConfigJSON("auto", 80),
			SupportFiles:     []protocol.SupportFile{{Path: "1.crt", Content: "cert"}},
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}

	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	snapshot, _ := stateStore.Load()
	snapshot.NodeID = nodeID
	if err = stateStore.Save(snapshot); err != nil {
		t.Fatalf("failed to save initial state: %v", err)
	}

	routePath := filepath.Join(t.TempDir(), "routes.conf")
	service := New(client, &nginx.Manager{
		MainConfigPath:  filepath.Join(filepath.Dir(routePath), "nginx.conf"),
		RouteConfigPath: routePath,
		Executor:        &fakeExecutor{},
	}, stateStore)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}

	data, err := os.ReadFile(routePath)
	if err != nil {
		t.Fatalf("failed to read route config: %v", err)
	}
	if !strings.Contains(string(data), "listen 80;") || !strings.Contains(string(data), "server_name example.com;") {
		t.Fatal("expected rendered config to be written to route file")
	}
	mainData, err := os.ReadFile(filepath.Join(filepath.Dir(routePath), "nginx.conf"))
	if err != nil {
		t.Fatalf("failed to read main config: %v", err)
	}
	if string(mainData) != "worker_processes auto;" {
		t.Fatal("expected main config to be written")
	}
	snapshot, err = stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.CurrentVersion != "20260309-001" || snapshot.CurrentChecksum != "checksum-1" {
		t.Fatal("expected state store to persist current version and checksum")
	}
	if len(client.reports) != 1 || client.reports[0].Result != ApplyResultSuccess {
		t.Fatal("expected successful apply report to be sent")
	}
	if client.reports[0].Checksum != "checksum-1" {
		t.Fatalf("expected config checksum to be reported, got %q", client.reports[0].Checksum)
	}
	if client.reports[0].MainConfigChecksum == "" || client.reports[0].RouteConfigChecksum == "" {
		t.Fatal("expected main and route config checksums to be reported")
	}
	if client.reports[0].SupportFileCount != 3 {
		t.Fatalf("expected support file count to be reported, got %d", client.reports[0].SupportFileCount)
	}
}

func TestSyncOnceDownloadsPagesDeploymentBeforeApply(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{"index.html": "hello"})
	checksum := testBytesChecksum(packageBytes)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-101",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(7, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{7: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	snapshot, _ := stateStore.Load()
	snapshot.NodeID = nodeID
	if err = stateStore.Save(snapshot); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	manager := &fakeManager{currentChecksum: "old-checksum"}
	service := New(client, manager, stateStore)
	pagesDir := t.TempDir()
	service.SetPagesDir(pagesDir)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{Version: "20260309-101", Checksum: "pages-config-checksum"}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	data, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "7", "current", "index.html"))
	if err != nil {
		t.Fatalf("expected Pages file to be extracted: %v", err)
	}
	if string(data) != "hello" {
		t.Fatalf("unexpected Pages file content: %s", string(data))
	}
	if len(manager.applyRouteContents) != 1 || !strings.Contains(manager.applyRouteContents[0], "__OPENFLARE_PAGES_DIR__/deployments/7/current") {
		t.Fatalf("expected Pages placeholder in rendered route config, got %#v", manager.applyRouteContents)
	}
}

func TestSyncPagesDeploymentEnsuresWorkerReadAccess(t *testing.T) {
	tempDir := t.TempDir()
	dataDir := filepath.Join(tempDir, "data")
	if err := os.MkdirAll(dataDir, 0o700); err != nil {
		t.Fatalf("MkdirAll failed: %v", err)
	}
	pagesDir := filepath.Join(dataDir, "var", "lib", "openflare", "pages")

	packageBytes := testPagesPackage(t, map[string]string{"index.html": "hello"})
	checksum := testBytesChecksum(packageBytes)
	config := protocol.ActiveConfigResponse{
		Version:          "20260309-106",
		Checksum:         "pages-config-checksum",
		SourceConfigJSON: testPagesSourceConfigJSON(7, checksum),
		CreatedAt:        time.Now().Format(time.RFC3339),
	}
	client := &fakeClient{
		config:        config,
		pagesPackages: map[uint][]byte{7: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(tempDir, "state.json"))
	snapshot, _ := stateStore.Load()

	runtimeManager := &nginx.Manager{PagesDir: pagesDir}
	service := New(client, runtimeManager, stateStore)
	service.SetPagesDir(pagesDir)

	if err := service.syncPagesDeployments(context.Background(), snapshot, &config); err != nil {
		t.Fatalf("syncPagesDeployments failed: %v", err)
	}

	dataInfo, err := os.Stat(dataDir)
	if err != nil {
		t.Fatalf("Stat dataDir failed: %v", err)
	}
	if dataInfo.Mode().Perm()&0o005 == 0 {
		t.Fatalf("expected dataDir to be world-traversable, got %o", dataInfo.Mode().Perm())
	}
	indexPath := filepath.Join(pagesDir, "deployments", "7", "current", "index.html")
	indexInfo, err := os.Stat(indexPath)
	if err != nil {
		t.Fatalf("expected Pages file to be extracted: %v", err)
	}
	if indexInfo.Mode().Perm() != 0o644 {
		t.Fatalf("expected index.html mode 0644, got %o", indexInfo.Mode().Perm())
	}
}

func TestSyncOnceExtractsPagesPackageWithZeroByteFiles(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{
		"index.html": "hello",
		".gitkeep":   "",
	})
	checksum := testBytesChecksum(packageBytes)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-103",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(9, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{9: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	snapshot, _ := stateStore.Load()
	snapshot.NodeID = nodeID
	if err = stateStore.Save(snapshot); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	manager := &fakeManager{currentChecksum: "old-checksum"}
	service := New(client, manager, stateStore)
	pagesDir := t.TempDir()
	service.SetPagesDir(pagesDir)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{Version: "20260309-103", Checksum: "pages-config-checksum"}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	gitkeepPath := filepath.Join(pagesDir, "deployments", "9", "current", ".gitkeep")
	info, err := os.Stat(gitkeepPath)
	if err != nil {
		t.Fatalf("expected zero-byte Pages file to be extracted: %v", err)
	}
	if info.Size() != 0 {
		t.Fatalf("expected zero-byte Pages file, got %d bytes", info.Size())
	}
}

func TestSyncOnceRejectsPagesZipSlipBeforeApply(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{"../escape.html": "bad", "index.html": "ok"})
	checksum := testBytesChecksum(packageBytes)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-102",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(8, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{8: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	if _, err := stateStore.EnsureNodeID(); err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	manager := &fakeManager{currentChecksum: "old-checksum"}
	service := New(client, manager, stateStore)
	service.SetPagesDir(t.TempDir())

	err := service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{Version: "20260309-102", Checksum: "pages-config-checksum"})
	if err == nil || !strings.Contains(err.Error(), "escapes deployment root") {
		t.Fatalf("expected zip-slip rejection, got %v", err)
	}
	if len(manager.applyRouteContents) != 0 {
		t.Fatalf("OpenResty apply must not run after Pages package rejection")
	}
}

func TestSyncOnceRollbackOnNginxFailure(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-002",
			Checksum:         "checksum-2",
			SourceConfigJSON: testSourceConfigJSON("2", 81),
			SupportFiles:     []protocol.SupportFile{{Path: "1.crt", Content: "cert"}},
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}

	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-001",
		CurrentChecksum: "checksum-1",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	service := New(client, &fakeManager{
		applyOutcome: nginx.ApplyOutcome{
			Status:  nginx.ApplyStatusFatal,
			Message: "openresty failed after rollback",
		},
	}, stateStore)

	err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	})
	if err == nil {
		t.Fatal("expected SyncOnce to fail when apply outcome is fatal")
	}
	snapshot, loadErr := stateStore.Load()
	if loadErr != nil {
		t.Fatalf("failed to load state: %v", loadErr)
	}
	if snapshot.CurrentVersion != "20260309-001" {
		t.Fatal("expected failed sync not to overwrite current version")
	}
	if snapshot.BlockedVersion != "20260309-002" || snapshot.BlockedChecksum != "checksum-2" {
		t.Fatalf("expected failed target version to be blocked, got %+v", snapshot)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusUnhealthy {
		t.Fatalf("expected unhealthy openresty status, got %q", snapshot.OpenrestyStatus)
	}
	if len(client.reports) != 1 || client.reports[0].Result != ApplyResultFailed {
		t.Fatal("expected failed apply report to be sent")
	}
	if client.reports[0].Checksum != "checksum-2" {
		t.Fatalf("expected failed report to retain target checksum, got %q", client.reports[0].Checksum)
	}
	if client.reports[0].MainConfigChecksum == "" || client.reports[0].RouteConfigChecksum == "" {
		t.Fatal("expected failed report to include main and route config checksums")
	}
	if client.reports[0].SupportFileCount != 3 {
		t.Fatalf("expected failed report to include support file count, got %d", client.reports[0].SupportFileCount)
	}
}

func TestSyncOnceReportsWarningWhenRollbackKeepsOpenrestyHealthy(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-002",
			Checksum:         "checksum-2",
			SourceConfigJSON: testSourceConfigJSON("2", 81),
			SupportFiles:     []protocol.SupportFile{{Path: "1.crt", Content: "cert"}},
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}

	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-001",
		CurrentChecksum: "checksum-1",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	service := New(client, &fakeManager{
		applyOutcome: nginx.ApplyOutcome{
			Status:  nginx.ApplyStatusWarning,
			Message: "apply failed, rolled back to previous config",
		},
	}, stateStore)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("expected warning outcome to keep sync successful, got %v", err)
	}

	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.CurrentVersion != "20260309-001" || snapshot.CurrentChecksum != "checksum-1" {
		t.Fatal("expected warning apply to keep previous version state")
	}
	if snapshot.BlockedVersion != "20260309-002" || snapshot.BlockedChecksum != "checksum-2" {
		t.Fatalf("expected rolled-back target version to be blocked, got %+v", snapshot)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusHealthy {
		t.Fatalf("expected healthy openresty after rollback, got %q", snapshot.OpenrestyStatus)
	}
	if snapshot.LastError == "" {
		t.Fatal("expected rollback warning to be recorded")
	}
	if len(client.reports) != 1 || client.reports[0].Result != ApplyResultWarning {
		t.Fatal("expected warning apply report to be sent")
	}
}

func TestSyncOnStartupRecreatesRuntimeWhenChecksumMatches(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-003",
			Checksum:         "checksum-3",
			SourceConfigJSON: testSourceConfigJSON("auto", 82),
			SupportFiles:     []protocol.SupportFile{{Path: "1.crt", Content: "cert"}},
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{NodeID: nodeID}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-3"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnStartup failed: %v", err)
	}
	if len(manager.applyMainContents) != 1 {
		t.Fatal("expected startup sync to re-render and apply local config")
	}
	if len(client.reports) != 1 || client.reports[0].Result != ApplyResultSuccess {
		t.Fatal("expected startup sync to report apply success when state is refreshed")
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.CurrentChecksum != "checksum-3" || snapshot.CurrentVersion != "20260309-003" {
		t.Fatal("expected snapshot to be refreshed from active config")
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusHealthy || snapshot.OpenrestyMessage != "" {
		t.Fatal("expected startup sync to mark openresty healthy")
	}
}

func TestSyncOnceReportsNoopWhenVersionChangesButChecksumMatches(t *testing.T) {
	client := &fakeClient{}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-002",
		CurrentChecksum: "checksum-3",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-3"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-003",
		Checksum: "checksum-3",
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	if client.fetchCalls != 1 {
		t.Fatalf("expected checksum match to fetch active config once for Pages reconciliation, got %d", client.fetchCalls)
	}
	if len(manager.applyMainContents) != 0 {
		t.Fatal("expected checksum match to skip apply")
	}
	if len(client.reports) != 1 || client.reports[0].Result != ApplyResultSuccess {
		t.Fatalf("expected noop apply success report, got %+v", client.reports)
	}
	if client.reports[0].Version != "20260309-003" || client.reports[0].Checksum != "checksum-3" {
		t.Fatalf("unexpected noop apply report: %+v", client.reports[0])
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.CurrentVersion != "20260309-003" || snapshot.CurrentChecksum != "checksum-3" {
		t.Fatalf("expected state to refresh active version, got %+v", snapshot)
	}
}

func TestSyncOnStartupSkipsDuplicateSuccessReportWhenStateAlreadySynced(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-003",
			Checksum:         "checksum-3",
			SourceConfigJSON: testSourceConfigJSON("auto", 80),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-003",
		CurrentChecksum: "checksum-3",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-3"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-003",
		Checksum: "checksum-3",
	}); err != nil {
		t.Fatalf("SyncOnStartup failed: %v", err)
	}
	if len(client.reports) != 0 {
		t.Fatalf("expected startup sync to skip duplicate success report, got %+v", client.reports)
	}
	if len(manager.applyMainContents) != 1 {
		t.Fatal("expected startup sync to still refresh local config once")
	}
}

func TestSyncOnceDoesNotRepeatNoopReportWhenStateAlreadyMatches(t *testing.T) {
	client := &fakeClient{}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:           nodeID,
		CurrentVersion:   "20260309-003",
		CurrentChecksum:  "checksum-3",
		PagesDeployments: []state.PagesDeployment{},
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-3"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-003",
		Checksum: "checksum-3",
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected no active config fetch when Pages releases are already reconciled, got %d", client.fetchCalls)
	}
	if len(client.reports) != 0 {
		t.Fatalf("expected matching state to skip duplicate noop report, got %+v", client.reports)
	}
}

func TestSyncOnStartupRecordsRuntimeFailure(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-004",
			Checksum:         "checksum-4",
			SourceConfigJSON: testSourceConfigJSON("4", 83),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{NodeID: nodeID}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{
		currentChecksum: "checksum-4",
		applyOutcome:    nginx.ApplyOutcome{Status: nginx.ApplyStatusFatal, Message: context.DeadlineExceeded.Error()},
	}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err == nil {
		t.Fatal("expected SyncOnStartup to fail when runtime recreation fails")
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusUnhealthy {
		t.Fatalf("expected unhealthy openresty status, got %q", snapshot.OpenrestyStatus)
	}
	if snapshot.OpenrestyMessage == "" {
		t.Fatal("expected runtime error message to be recorded")
	}
}

func TestSyncOnceSkipsPreviouslyBlockedVersion(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-006",
			Checksum:         "checksum-6",
			SourceConfigJSON: testSourceConfigJSON("6", 86),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-005",
		CurrentChecksum: "checksum-5",
		BlockedVersion:  "20260309-006",
		BlockedChecksum: "checksum-6",
		BlockedReason:   "apply failed, rolled back to previous config",
		LastError:       "apply failed, rolled back to previous config",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-5"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-006",
		Checksum: "checksum-6",
	}); err != nil {
		t.Fatalf("expected blocked version to be skipped, got %v", err)
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected blocked version to skip fetch, got %d", client.fetchCalls)
	}
	if len(manager.applyMainContents) != 0 {
		t.Fatal("expected blocked version to skip apply")
	}
	if len(client.reports) != 0 {
		t.Fatal("expected blocked version to skip reporting duplicate apply result")
	}
}

func TestSyncOnStartupKeepsBlockedVersionSuppressedUntilNewTargetArrives(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-007",
			Checksum:         "checksum-7",
			SourceConfigJSON: testSourceConfigJSON("7", 87),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:           nodeID,
		CurrentVersion:   "20260309-005",
		CurrentChecksum:  "checksum-5",
		BlockedVersion:   "20260309-007",
		BlockedChecksum:  "checksum-7",
		BlockedReason:    "apply failed, rolled back to previous config",
		OpenrestyStatus:  protocol.OpenrestyStatusUnhealthy,
		OpenrestyMessage: "apply failed, rolled back to previous config",
		LastError:        "apply failed, rolled back to previous config",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: "checksum-5"}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-007",
		Checksum: "checksum-7",
	}); err != nil {
		t.Fatalf("expected blocked startup target to be skipped, got %v", err)
	}
	if len(manager.ensureCalls) != 1 || !manager.ensureCalls[0] {
		t.Fatal("expected startup skip to ensure runtime with current local config")
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected blocked startup target to skip fetch, got %d", client.fetchCalls)
	}
	if len(client.reports) != 0 {
		t.Fatal("expected blocked startup target to skip duplicate apply report")
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.BlockedVersion != "20260309-007" || snapshot.BlockedChecksum != "checksum-7" {
		t.Fatalf("expected blocked target to remain recorded, got %+v", snapshot)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusHealthy {
		t.Fatalf("expected startup runtime recovery to mark openresty healthy, got %q", snapshot.OpenrestyStatus)
	}
}

func TestSyncOnStartupStartsFallbackWhenBlockedVersionHasNoLocalConfig(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-007",
			Checksum:         "checksum-7",
			SourceConfigJSON: testSourceConfigJSON("7", 87),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:           nodeID,
		BlockedVersion:   "20260309-007",
		BlockedChecksum:  "checksum-7",
		BlockedReason:    "apply failed, but fallback runtime started",
		OpenrestyStatus:  protocol.OpenrestyStatusUnhealthy,
		OpenrestyMessage: "apply failed, but fallback runtime started",
		LastError:        "apply failed, but fallback runtime started",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-007",
		Checksum: "checksum-7",
	}); err != nil {
		t.Fatalf("expected blocked startup target to start fallback, got %v", err)
	}
	if len(manager.fallbackReasons) != 1 {
		t.Fatalf("expected fallback runtime to be started once, got %d", len(manager.fallbackReasons))
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected blocked startup target to skip fetch, got %d", client.fetchCalls)
	}
	if len(client.reports) != 0 {
		t.Fatal("expected blocked startup target to skip duplicate apply report")
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.BlockedVersion != "20260309-007" || snapshot.BlockedChecksum != "checksum-7" {
		t.Fatalf("expected blocked target to remain recorded, got %+v", snapshot)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusHealthy {
		t.Fatalf("expected fallback startup recovery to mark openresty healthy, got %q", snapshot.OpenrestyStatus)
	}
	if snapshot.OpenrestyMessage != "safe default fallback runtime started" {
		t.Fatalf("expected fallback status message, got %q", snapshot.OpenrestyMessage)
	}
}

func TestSyncOnStartupStartsFallbackWhenResidualConfigCannotRecover(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-007",
			Checksum:         "checksum-7",
			SourceConfigJSON: testSourceConfigJSON("7", 87),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		BlockedVersion:  "20260309-007",
		BlockedChecksum: "checksum-7",
		BlockedReason:   "apply failed, but fallback runtime started",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{
		currentChecksum: "residual-checksum",
		ensureErr:       context.DeadlineExceeded,
	}
	service := New(client, manager, stateStore)
	if err = service.SyncOnStartup(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-007",
		Checksum: "checksum-7",
	}); err != nil {
		t.Fatalf("expected residual config failure to start fallback, got %v", err)
	}
	if len(manager.ensureCalls) != 1 {
		t.Fatalf("expected residual config to be tested once, got %d", len(manager.ensureCalls))
	}
	if len(manager.fallbackReasons) != 1 {
		t.Fatalf("expected fallback runtime to be started once, got %d", len(manager.fallbackReasons))
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.OpenrestyStatus != protocol.OpenrestyStatusHealthy {
		t.Fatalf("expected fallback startup recovery to mark openresty healthy, got %q", snapshot.OpenrestyStatus)
	}
	if snapshot.BlockedVersion != "20260309-007" || snapshot.BlockedChecksum != "checksum-7" {
		t.Fatalf("expected blocked target to remain recorded, got %+v", snapshot)
	}
}

func TestSyncOnceClearsBlockedTargetWhenNewVersionArrives(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-008",
			Checksum:         "checksum-8",
			SourceConfigJSON: testSourceConfigJSON("8", 88),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  "20260309-005",
		CurrentChecksum: "checksum-5",
		BlockedVersion:  "20260309-007",
		BlockedChecksum: "checksum-7",
		BlockedReason:   "apply failed, rolled back to previous config",
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{}
	service := New(client, manager, stateStore)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  "20260309-008",
		Checksum: "checksum-8",
	}); err != nil {
		t.Fatalf("expected new target version to be applied, got %v", err)
	}
	if client.fetchCalls != 1 {
		t.Fatalf("expected new target to trigger fetch, got %d", client.fetchCalls)
	}
	if len(manager.applyMainContents) != 1 {
		t.Fatal("expected new target to trigger apply")
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if snapshot.BlockedVersion != "" || snapshot.BlockedChecksum != "" {
		t.Fatalf("expected blocked target to be cleared after new version succeeds, got %+v", snapshot)
	}
	if snapshot.CurrentVersion != "20260309-008" || snapshot.CurrentChecksum != "checksum-8" {
		t.Fatalf("expected current version to move to new target, got %+v", snapshot)
	}
}

func TestSyncOnceSkipsFetchWhenHeartbeatChecksumMatches(t *testing.T) {
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-005",
			Checksum:         "checksum-5",
			SourceConfigJSON: testSourceConfigJSON("auto", 84),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:           nodeID,
		CurrentVersion:   client.config.Version,
		CurrentChecksum:  client.config.Checksum,
		PagesDeployments: []state.PagesDeployment{},
	}); err != nil {
		t.Fatalf("failed to seed state: %v", err)
	}

	manager := &fakeManager{currentChecksum: client.config.Checksum}
	service := New(client, manager, stateStore)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected no active config fetch when Pages releases are already reconciled, got %d", client.fetchCalls)
	}
	if len(manager.applyMainContents) != 0 {
		t.Fatal("expected checksum match to skip apply")
	}
	if len(client.reports) != 0 {
		t.Fatal("expected no apply log when no config change is needed")
	}
}

func TestSyncOnceDownloadsPagesDeploymentWhenChecksumMatches(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{"index.html": "hello"})
	checksum := testBytesChecksum(packageBytes)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-101",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(7, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{7: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  client.config.Version,
		CurrentChecksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	manager := &fakeManager{currentChecksum: client.config.Checksum}
	service := New(client, manager, stateStore)
	pagesDir := t.TempDir()
	service.SetPagesDir(pagesDir)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	data, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "7", "current", "index.html"))
	if err != nil {
		t.Fatalf("expected Pages file to be extracted when checksum already matches: %v", err)
	}
	if string(data) != "hello" {
		t.Fatalf("unexpected Pages file content: %s", string(data))
	}
	if len(manager.applyMainContents) != 0 {
		t.Fatal("expected checksum match to skip OpenResty apply")
	}
	if client.fetchCalls != 1 {
		t.Fatalf("expected one active config fetch on first reconcile, got %d", client.fetchCalls)
	}

	client.fetchCalls = 0
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("second SyncOnce failed: %v", err)
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected no active config fetch after Pages release is ready, got %d", client.fetchCalls)
	}
	snapshot, err := stateStore.Load()
	if err != nil {
		t.Fatalf("failed to load state: %v", err)
	}
	if len(snapshot.PagesDeployments) != 1 || snapshot.PagesDeployments[0].DeploymentID != 7 || snapshot.PagesDeployments[0].Hash != checksum {
		t.Fatalf("expected Pages deployment refs to be cached in state, got %+v", snapshot.PagesDeployments)
	}
	if client.hashCalls == 0 {
		t.Fatal("expected Pages hash check during reconcile")
	}
}

func TestSyncOnceRedownloadsPagesDeploymentWhenServerHashChanges(t *testing.T) {
	initialPackage := testPagesPackage(t, map[string]string{"index.html": "v1"})
	updatedPackage := testPagesPackage(t, map[string]string{"index.html": "v2"})
	initialHash := testBytesChecksum(initialPackage)
	updatedHash := testBytesChecksum(updatedPackage)
	deploymentID := uint(12)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-107",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(deploymentID, initialHash),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{deploymentID: initialPackage},
		pagesHashes:   map[uint]string{deploymentID: initialHash},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  client.config.Version,
		CurrentChecksum: client.config.Checksum,
		PagesDeployments: []state.PagesDeployment{{
			DeploymentID: deploymentID,
			Hash:         initialHash,
		}},
	}); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	pagesDir := t.TempDir()
	releaseDir := pagesReleaseDir(pagesDir, deploymentID, initialHash)
	if err = extractPagesPackage(initialPackage, releaseDir, pagesDeploymentSource{
		DeploymentID: deploymentID,
		Checksum:     initialHash,
	}); err != nil {
		t.Fatalf("seed release failed: %v", err)
	}
	if err = switchPagesCurrentDir(pagesDir, deploymentID, releaseDir); err != nil {
		t.Fatalf("seed current dir failed: %v", err)
	}

	client.pagesPackages[deploymentID] = updatedPackage
	client.pagesHashes[deploymentID] = updatedHash
	manager := &fakeManager{currentChecksum: client.config.Checksum}
	service := New(client, manager, stateStore)
	service.SetPagesDir(pagesDir)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	data, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "12", "current", "index.html"))
	if err != nil {
		t.Fatalf("expected updated Pages file: %v", err)
	}
	if string(data) != "v2" {
		t.Fatalf("unexpected Pages file content after hash change: %s", string(data))
	}
	if client.fetchCalls != 0 {
		t.Fatalf("expected hash-only reconcile without active config fetch, got %d", client.fetchCalls)
	}
}

func TestSyncOnceRedownloadsPagesDeploymentWhenReleaseDirOnlyHasMarker(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{"index.html": "hello"})
	checksum := testBytesChecksum(packageBytes)
	deploymentID := uint(11)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-106",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(deploymentID, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{deploymentID: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	if err = stateStore.Save(&state.Snapshot{
		NodeID:          nodeID,
		CurrentVersion:  client.config.Version,
		CurrentChecksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	pagesDir := t.TempDir()
	releaseDir := pagesReleaseDir(pagesDir, deploymentID, checksum)
	if err = os.MkdirAll(releaseDir, pagesDirPerm); err != nil {
		t.Fatalf("mkdir release dir failed: %v", err)
	}
	if err = writePagesMarker(releaseDir, pagesDeploymentSource{DeploymentID: deploymentID, Checksum: checksum}); err != nil {
		t.Fatalf("write marker failed: %v", err)
	}
	if pagesReleaseReady(releaseDir, pagesDeploymentSource{DeploymentID: deploymentID, Checksum: checksum}) {
		t.Fatal("expected marker-only release dir to be treated as not ready")
	}

	manager := &fakeManager{currentChecksum: client.config.Checksum}
	service := New(client, manager, stateStore)
	service.SetPagesDir(pagesDir)
	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{
		Version:  client.config.Version,
		Checksum: client.config.Checksum,
	}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	data, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "11", "current", "index.html"))
	if err != nil {
		t.Fatalf("expected Pages file to be extracted after marker-only release dir: %v", err)
	}
	if string(data) != "hello" {
		t.Fatalf("unexpected Pages file content: %s", string(data))
	}
}

func testPagesPackage(t *testing.T, files map[string]string) []byte {
	t.Helper()
	var buffer bytes.Buffer
	writer := zip.NewWriter(&buffer)
	for name, content := range files {
		file, err := writer.Create(name)
		if err != nil {
			t.Fatalf("create zip file failed: %v", err)
		}
		if _, err := file.Write([]byte(content)); err != nil {
			t.Fatalf("write zip file failed: %v", err)
		}
	}
	if err := writer.Close(); err != nil {
		t.Fatalf("close zip failed: %v", err)
	}
	return buffer.Bytes()
}

func testBytesChecksum(data []byte) string {
	sum := sha256.Sum256(data)
	return hex.EncodeToString(sum[:])
}

func TestSyncOnceDownloadsPagesDeploymentWithTopLevelFolder(t *testing.T) {
	packageBytes := testPagesPackage(t, map[string]string{
		"Speed-Test-source/index.html":    "hello html",
		"Speed-Test-source/assets/app.js": "hello js",
	})
	checksum := testBytesChecksum(packageBytes)
	client := &fakeClient{
		config: protocol.ActiveConfigResponse{
			Version:          "20260309-105",
			Checksum:         "pages-config-checksum",
			SourceConfigJSON: testPagesSourceConfigJSON(77, checksum),
			CreatedAt:        time.Now().Format(time.RFC3339),
		},
		pagesPackages: map[uint][]byte{77: packageBytes},
	}
	stateStore := state.NewStore(filepath.Join(t.TempDir(), "state.json"))
	nodeID, err := stateStore.EnsureNodeID()
	if err != nil {
		t.Fatalf("EnsureNodeID failed: %v", err)
	}
	snapshot, _ := stateStore.Load()
	snapshot.NodeID = nodeID
	if err = stateStore.Save(snapshot); err != nil {
		t.Fatalf("save state failed: %v", err)
	}
	manager := &fakeManager{currentChecksum: "old-checksum"}
	service := New(client, manager, stateStore)
	pagesDir := t.TempDir()
	service.SetPagesDir(pagesDir)

	if err = service.SyncOnce(context.Background(), &protocol.ActiveConfigMeta{Version: "20260309-105", Checksum: "pages-config-checksum"}); err != nil {
		t.Fatalf("SyncOnce failed: %v", err)
	}
	data, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "77", "current", "index.html"))
	if err != nil {
		t.Fatalf("expected Pages index.html file to be extracted: %v", err)
	}
	if string(data) != "hello html" {
		t.Fatalf("unexpected Pages index.html content: %s", string(data))
	}
	jsData, err := os.ReadFile(filepath.Join(pagesDir, "deployments", "77", "current", "assets", "app.js"))
	if err != nil {
		t.Fatalf("expected Pages assets/app.js file to be extracted: %v", err)
	}
	if string(jsData) != "hello js" {
		t.Fatalf("unexpected Pages assets/app.js content: %s", string(jsData))
	}
}