package main

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

	"verstak/internal/core/actions"
	"verstak/internal/core/activity"
	"verstak/internal/core/files"
	"verstak/internal/core/nodes"
	"verstak/internal/core/notes"
	"verstak/internal/core/plugins"
	"verstak/internal/core/search"
	"verstak/internal/core/storage"
	syncsvc "verstak/internal/core/sync"
	"verstak/internal/core/templates"
	"verstak/internal/core/worklog"
)

// setupTestApp creates a full App with a temp vault directory for testing.
func setupTestApp(t *testing.T) (*App, string) {
	t.Helper()
	vaultRoot, err := os.MkdirTemp("", "verstak-test-*")
	if err != nil {
		t.Fatalf("mkdir temp: %v", err)
	}

	// Init vault structure
	if err := os.MkdirAll(filepath.Join(vaultRoot, ".verstak"), 0o750); err != nil {
		t.Fatalf("mkdir .verstak: %v", err)
	}
	if err := os.MkdirAll(filepath.Join(vaultRoot, ".verstak", "trash"), 0o750); err != nil {
		t.Fatalf("mkdir trash: %v", err)
	}

	dbPath := filepath.Join(vaultRoot, ".verstak", "vault.db")
	db, err := storage.Open(dbPath)
	if err != nil {
		t.Fatalf("open db: %v", err)
	}

	nodeRepo := nodes.NewRepository(db)
	fileSvc := files.NewService(db, vaultRoot, nodeRepo)
	noteSvc := notes.NewService(db, vaultRoot, nodeRepo, fileSvc)
	actionSvc := actions.NewService(db)
	activitySvc := activity.NewService(db)
	worklogSvc := worklog.NewService(db)
	searchSvc := search.NewService(db)
	pm := plugins.NewManager(vaultRoot)
	pm.Discover()

	templatesReg := templates.NewRegistry()
	if err := templatesReg.LoadSystem(); err != nil {
		t.Fatalf("load templates: %v", err)
	}

	syncSvc := syncsvc.NewService(db, "test-device")

	app := &App{
		db:        db,
		nodes:     nodeRepo,
		files:     fileSvc,
		notes:     noteSvc,
		activity:  activitySvc,
		actions:   actionSvc,
		worklog:   worklogSvc,
		search:    searchSvc,
		plugins:   pm,
		sync:      syncSvc,
		templates: templatesReg,
		vault:     vaultRoot,
	}

	t.Cleanup(func() {
		db.Close()
		os.RemoveAll(vaultRoot)
	})

	return app, vaultRoot
}

func TestVaultLayout_CreateProjectTree(t *testing.T) {
	app, vault := setupTestApp(t)

	// 1. Create root "Проекты" from folder template
	proj, err := app.CreateNodeFromTemplate("", "Проекты", "folder.default")
	if err != nil {
		t.Fatalf("create Проекты: %v", err)
	}
	if proj.FsPath != "Проекты" {
		t.Errorf("expected fs_path 'Проекты', got %q", proj.FsPath)
	}
	if _, err := os.Stat(filepath.Join(vault, "Проекты")); os.IsNotExist(err) {
		t.Error("expected folder 'Проекты' to exist on disk")
	}

	// 2. Create child "Рабочие" inside Проекты
	work, err := app.CreateNodeFromTemplate(proj.ID, "Рабочие", "folder.default")
	if err != nil {
		t.Fatalf("create Рабочие: %v", err)
	}
	expectedWorkPath := "Проекты/Рабочие"
	if work.FsPath != expectedWorkPath {
		t.Errorf("expected fs_path %q, got %q", expectedWorkPath, work.FsPath)
	}
	if _, err := os.Stat(filepath.Join(vault, expectedWorkPath)); os.IsNotExist(err) {
		t.Error("expected folder 'Проекты/Рабочие' to exist on disk")
	}

	// 3. Create project "Разработка серверной" from project template
	server, err := app.CreateNodeFromTemplate(work.ID, "Разработка серверной", "project.default")
	if err != nil {
		t.Fatalf("create Разработка серверной: %v", err)
	}
	expectedServerPath := "Проекты/Рабочие/Разработка серверной"
	if server.FsPath != expectedServerPath {
		t.Errorf("expected fs_path %q, got %q", expectedServerPath, server.FsPath)
	}
	serverFolder := filepath.Join(vault, expectedServerPath)
	if _, err := os.Stat(serverFolder); os.IsNotExist(err) {
		t.Error("expected project folder on disk")
	}

	// 4. Verify template created Overview.md
	overviewPath := filepath.Join(serverFolder, "Overview.md")
	if _, err := os.Stat(overviewPath); os.IsNotExist(err) {
		t.Log("note: Overview.md from template not created (may not be implemented)")
	}
}

func TestVaultLayout_CreateNoteInsideProject(t *testing.T) {
	app, vault := setupTestApp(t)

	proj, err := app.CreateNodeFromTemplate("", "Тестовый проект", "project.default")
	if err != nil {
		t.Fatalf("create project: %v", err)
	}

	// Create a note inside the project
	noteNode, fileRec, err := app.notes.Create(proj.ID, "Моя заметка", "")
	if err != nil {
		t.Fatalf("create note: %v", err)
	}
	if noteNode == nil || fileRec == nil {
		t.Fatal("expected non-nil node and file record")
	}

	// Verify the note .md file is inside the project folder
	expectedPath := filepath.Join(vault, proj.FsPath, "Моя заметка.md")
	if _, err := os.Stat(expectedPath); os.IsNotExist(err) {
		// Try the safe-display-name variant
		expectedPath2 := filepath.Join(vault, proj.FsPath, "Моя_заметка.md")
		if _, err2 := os.Stat(expectedPath2); os.IsNotExist(err2) {
			// Show what actually exists
			entries, _ := os.ReadDir(filepath.Join(vault, proj.FsPath))
			t.Errorf("expected note file in project folder, found: %v", listNames(entries))
		}
	}
}

func TestVaultLayout_CopyFileIntoProject(t *testing.T) {
	app, vault := setupTestApp(t)

	proj, err := app.CreateNodeFromTemplate("", "Проект", "folder.default")
	if err != nil {
		t.Fatalf("create project: %v", err)
	}

	// Create a temp source file
	srcFile := filepath.Join(vault, "source.txt")
	if err := os.WriteFile(srcFile, []byte("hello"), 0o640); err != nil {
		t.Fatalf("write source: %v", err)
	}

	// Create a file node inside the project
	fileNode, err := app.nodes.Create(&proj.ID, "file", "test.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}

	// Copy the file into vault (using parent's fs_path)
	rec, err := app.files.CopyIntoVault(fileNode.ID, srcFile, proj.FsPath)
	if err != nil {
		t.Fatalf("copy into vault: %v", err)
	}

	// Verify file lands in project folder
	expectedPath := filepath.Join(vault, proj.FsPath, "source.txt")
	if _, err := os.Stat(expectedPath); os.IsNotExist(err) {
		t.Errorf("expected file at %s, record path = %s", expectedPath, rec.Path)
	}
}

func TestVaultLayout_RenameParentUpdatesDescendants(t *testing.T) {
	app, vault := setupTestApp(t)

	root, _ := app.CreateNodeFromTemplate("", "Root", "folder.default")
	child, _ := app.CreateNodeFromTemplate(root.ID, "Child", "folder.default")
	grandchild, _ := app.CreateNodeFromTemplate(child.ID, "Grandchild", "folder.default")

	// Rename root
	if err := app.RenameNode(root.ID, "RenamedRoot"); err != nil {
		t.Fatalf("rename root: %v", err)
	}

	// Verify child fs_path updated
	childUpdated, _ := app.nodes.GetActive(child.ID)
	expectedChildPath := "RenamedRoot/Child"
	if childUpdated.FsPath != expectedChildPath {
		t.Errorf("expected child fs_path %q, got %q", expectedChildPath, childUpdated.FsPath)
	}

	// Verify grandchild fs_path updated
	gcUpdated, _ := app.nodes.GetActive(grandchild.ID)
	expectedGCPath := "RenamedRoot/Child/Grandchild"
	if gcUpdated.FsPath != expectedGCPath {
		t.Errorf("expected grandchild fs_path %q, got %q", expectedGCPath, gcUpdated.FsPath)
	}

	// Verify physical folders
	if _, err := os.Stat(filepath.Join(vault, expectedChildPath)); os.IsNotExist(err) {
		t.Error("expected child folder on disk after rename")
	}
	if _, err := os.Stat(filepath.Join(vault, expectedGCPath)); os.IsNotExist(err) {
		t.Error("expected grandchild folder on disk after rename")
	}

	// Verify old path no longer exists
	if _, err := os.Stat(filepath.Join(vault, "Root")); !os.IsNotExist(err) {
		t.Error("expected old root path to not exist")
	}
}

func TestVaultLayout_MoveNode(t *testing.T) {
	app, vault := setupTestApp(t)

	folder1, _ := app.CreateNodeFromTemplate("", "Folder1", "folder.default")
	folder2, _ := app.CreateNodeFromTemplate("", "Folder2", "folder.default")
	child, _ := app.CreateNodeFromTemplate(folder1.ID, "Child", "folder.default")

	// Move child from Folder1 to Folder2
	if err := app.MoveNode(child.ID, folder2.ID); err != nil {
		t.Fatalf("move node: %v", err)
	}

	moved, _ := app.nodes.GetActive(child.ID)
	expectedPath := "Folder2/Child"
	if moved.FsPath != expectedPath {
		t.Errorf("expected fs_path %q, got %q", expectedPath, moved.FsPath)
	}

	if _, err := os.Stat(filepath.Join(vault, expectedPath)); os.IsNotExist(err) {
		t.Error("expected child folder at new location on disk")
	}
}

func TestVaultLayout_DeleteMovesToTrash(t *testing.T) {
	app, vault := setupTestApp(t)

	node, _ := app.CreateNodeFromTemplate("", "ToDelete", "folder.default")
	nodePath := filepath.Join(vault, "ToDelete")
	if _, err := os.Stat(nodePath); os.IsNotExist(err) {
		t.Fatal("expected folder to exist before delete")
	}

	// Delete the node
	if err := app.DeleteNode(node.ID); err != nil {
		t.Fatalf("delete node: %v", err)
	}

	// Verify node folder is no longer in original location
	if _, err := os.Stat(nodePath); !os.IsNotExist(err) {
		t.Error("expected node folder to be removed from original location")
	}

	// Verify trash has the folder
	trashDir := filepath.Join(vault, ".verstak", "trash")
	entries, _ := os.ReadDir(trashDir)
	found := false
	for _, e := range entries {
		if e.IsDir() && contains(e.Name(), "ToDelete") {
			found = true
			break
		}
	}
	if !found {
		t.Errorf("expected deleted folder in trash, found: %v", listNames(entries))
	}

	// Verify node is soft-deleted
	_, err := app.nodes.GetActive(node.ID)
	if err == nil {
		t.Error("expected node to be soft-deleted")
	}
}

func TestVaultLayout_NameConflict(t *testing.T) {
	app, vault := setupTestApp(t)

	node1, err := app.CreateNodeFromTemplate("", "SameName", "folder.default")
	if err != nil {
		t.Fatalf("create first: %v", err)
	}
	if node1.FsPath != "SameName" {
		t.Errorf("expected fs_path 'SameName', got %q", node1.FsPath)
	}

	node2, err := app.CreateNodeFromTemplate("", "SameName", "folder.default")
	if err != nil {
		t.Fatalf("create second: %v", err)
	}
	if node2.FsPath == "SameName" {
		t.Errorf("expected unique fs_path for second node, got same %q", node2.FsPath)
	}
	if node2.FsPath == node1.FsPath {
		t.Error("expected different fs_path for conflicting name")
	}

	// Both folders should exist on disk
	if _, err := os.Stat(filepath.Join(vault, node1.FsPath)); os.IsNotExist(err) {
		t.Errorf("expected first folder at %s", node1.FsPath)
	}
	if _, err := os.Stat(filepath.Join(vault, node2.FsPath)); os.IsNotExist(err) {
		t.Errorf("expected second folder at %s", node2.FsPath)
	}
}

func TestVaultLayout_VaultCheck(t *testing.T) {
	app, _ := setupTestApp(t)

	// Create a healthy vault structure
	app.CreateNodeFromTemplate("", "Healthy", "folder.default")
	child, _ := app.CreateNodeFromTemplate("", "Child", "folder.default")
	app.CreateNodeFromTemplate(child.ID, "Grandchild", "folder.default")

	// Run vault check
	result, err := app.VaultCheck()
	if err != nil {
		t.Fatalf("vault check: %v", err)
	}
	if !result.Healthy {
		t.Errorf("expected healthy vault, got errors: %v", result.Errors)
	}
	if result.TotalNodes == 0 {
		t.Error("expected at least 1 node in check")
	}
}

func TestVaultLayout_RenameFileNodeUsesEntityFile(t *testing.T) {
	app, vault := setupTestApp(t)

	parent, _ := app.CreateNodeFromTemplate("", "Parent", "folder.default")

	// Create a file node with file record
	fileNode, err := app.nodes.Create(&parent.ID, "file", "test.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}
	src := filepath.Join(vault, "src.txt")
	os.WriteFile(src, []byte("data"), 0o640)
	_, err = app.files.CopyIntoVault(fileNode.ID, src, parent.FsPath)
	if err != nil {
		t.Fatalf("copy into vault: %v", err)
	}

	// Rename the file node
	if err := app.RenameNode(fileNode.ID, "renamed.txt"); err != nil {
		t.Fatalf("rename file node: %v", err)
	}

	// Check the recorded sync op
	ops, err := app.sync.GetUnpushedOps()
	if err != nil {
		t.Fatalf("get ops: %v", err)
	}

	var found bool
	for _, op := range ops {
		if op.EntityID == fileNode.ID && op.OpType == syncsvc.OpUpdate {
			if op.EntityType != syncsvc.EntityFile {
				t.Errorf("expected EntityFile, got %q", op.EntityType)
			}
			found = true
			break
		}
	}
	if !found {
		t.Error("expected sync OpUpdate for file node")
	}

	// Verify physical file was renamed on disk
	records, _ := app.files.ListByNode(fileNode.ID)
	if len(records) > 0 && records[0].Filename != "renamed.txt" {
		t.Errorf("expected filename 'renamed.txt', got %q", records[0].Filename)
	}
	oldPath := filepath.Join(vault, parent.FsPath, "test.txt")
	if _, err := os.Stat(oldPath); !os.IsNotExist(err) {
		t.Error("expected old file name to not exist")
	}
}

func TestVaultLayout_MoveNoteToRoot(t *testing.T) {
	app, vault := setupTestApp(t)

	parent, _ := app.CreateNodeFromTemplate("", "Parent", "folder.default")
	noteNode, _, err := app.notes.Create(parent.ID, "MyNote", "")
	if err != nil {
		t.Fatalf("create note: %v", err)
	}

	// Verify note file exists in parent folder
	notePath := filepath.Join(vault, "Parent", "MyNote.md")
	altPath := filepath.Join(vault, "Parent", "Моя_заметка.md")
	if _, err := os.Stat(notePath); os.IsNotExist(err) {
		if _, err2 := os.Stat(altPath); os.IsNotExist(err2) {
			// Try other variants
			entries, _ := os.ReadDir(filepath.Join(vault, "Parent"))
			t.Logf("note file candidates: %v", listNames(entries))
		}
	}

	// Move note to root
	if err := app.MoveNode(noteNode.ID, ""); err != nil {
		t.Fatalf("move note to root: %v", err)
	}

	// Verify note node has no parent
	n, err := app.nodes.GetActive(noteNode.ID)
	if err != nil {
		t.Fatalf("get note: %v", err)
	}
	if !n.IsRoot() {
		t.Error("expected note to be root after move")
	}

	// Verify file record path was updated
	records, _ := app.files.ListByNode(noteNode.ID)
	if len(records) > 0 {
		expectedFileBase := filepath.Base(records[0].Path)
		// The file should be at vault root, not inside Parent/
		if records[0].Path != expectedFileBase {
			t.Errorf("expected file path at root, got %q", records[0].Path)
		}
	}
}

func TestVaultLayout_DeleteFolderLeavesVaultCheckHealthy(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create folder structure with files
	parent, _ := app.CreateNodeFromTemplate("", "ToDelete", "folder.default")
	child, _ := app.CreateNodeFromTemplate(parent.ID, "Child", "folder.default")

	// Create a file inside the folder
	src := filepath.Join(vault, "test.txt")
	os.WriteFile(src, []byte("data"), 0o640)
	fileNode, err := app.nodes.Create(&child.ID, "file", "file.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}
	app.files.CopyIntoVault(fileNode.ID, src, child.FsPath)

	// Create a note inside the folder
	app.notes.Create(child.ID, "Note", "")

	// Delete via GUI
	if err := app.DeleteNode(parent.ID); err != nil {
		t.Fatalf("delete: %v", err)
	}

	// VaultCheck should be healthy
	result, err := app.VaultCheck()
	if err != nil {
		t.Fatalf("vault check: %v", err)
	}
	if !result.Healthy {
		t.Errorf("expected healthy vault after delete, errors: %v", result.Errors)
	}
}

func TestVaultLayout_SyncNodeCreatePreservesFields(t *testing.T) {
	app, _ := setupTestApp(t)

	// Simulate a remote node create op with all fields
	op := syncsvc.Op{
		EntityType: syncsvc.EntityNode,
		EntityID:   "test-remote-id-1",
		OpType:     syncsvc.OpCreate,
		PayloadJSON: `{
			"id": "test-remote-id-1",
			"parent_id": "",
			"type": "folder",
			"title": "RemoteFolder",
			"slug": "remote-folder",
			"template_id": "folder.default",
			"fs_path": "RemoteFolder",
			"section": "",
			"sort_order": 5,
			"archived": false,
			"created_at": "2026-01-01T00:00:00Z",
			"updated_at": "2026-01-01T00:00:00Z"
		}`,
	}

	if err := app.applyRemoteNodeCreate(op); err != nil {
		t.Fatalf("apply remote create: %v", err)
	}

	// Verify the node was created with all fields
	n, err := app.nodes.Get("test-remote-id-1")
	if err != nil {
		t.Fatalf("get node: %v", err)
	}
	if n.TemplateID != "folder.default" {
		t.Errorf("expected template_id 'folder.default', got %q", n.TemplateID)
	}
	if n.FsPath != "RemoteFolder" {
		t.Errorf("expected fs_path 'RemoteFolder', got %q", n.FsPath)
	}
	if n.SortOrder != 5 {
		t.Errorf("expected sort_order 5, got %d", n.SortOrder)
	}
	if n.Archived {
		t.Error("expected archived false")
	}

	// Verify physical folder was created
	physPath := filepath.Join(app.vault, "RemoteFolder")
	if _, err := os.Stat(physPath); os.IsNotExist(err) {
		t.Error("expected physical folder to be created")
	}
}

func TestVaultLayout_ImportEmptyDirCreatesPhysicalFolder(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create a parent folder
	parent, err := app.CreateNodeFromTemplate("", "Parent", "folder.default")
	if err != nil {
		t.Fatalf("create parent: %v", err)
	}
	parentFsPath := parent.FsPath

	// Create an empty temp directory
	emptyDir := filepath.Join(vault, "emptydir")
	if err := os.MkdirAll(emptyDir, 0o750); err != nil {
		t.Fatalf("mkdir empty dir: %v", err)
	}

	// Import the empty directory
	nodes, err := app.files.AddPathCopy(parent.ID, emptyDir)
	if err != nil {
		t.Fatalf("import empty dir: %v", err)
	}

	if len(nodes) == 0 {
		t.Fatal("expected at least one node from import")
	}

	// The first node should be the imported folder
	folderNode := &nodes[0]
	if folderNode.Type != "folder" {
		t.Errorf("expected folder type, got %q", folderNode.Type)
	}

	// Re-read from DB to get updated FsPath (UpdateFsPath is called after Create)
	folderFromDB, err := app.nodes.Get(folderNode.ID)
	if err != nil {
		t.Fatalf("get folder from db: %v", err)
	}
	if folderFromDB.FsPath == "" {
		t.Error("expected non-empty fs_path for imported folder")
	}

	// Verify physical folder exists on disk
	expectedPath := filepath.Join(vault, parentFsPath, "emptydir")
	if _, err := os.Stat(expectedPath); os.IsNotExist(err) {
		t.Errorf("expected folder at %s", expectedPath)
	}
	if folderFromDB.FsPath != "" {
		folderPhysPath := filepath.Join(vault, folderFromDB.FsPath)
		if _, err := os.Stat(folderPhysPath); os.IsNotExist(err) {
			t.Errorf("expected physical folder at %s", folderPhysPath)
		}
	}
}

func TestVaultLayout_RemoteNoteMoveMovesFile(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create source parent folder
	srcParent, err := app.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("create src parent: %v", err)
	}
	// Create dest parent folder
	dstParent, err := app.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("create dst parent: %v", err)
	}

	// Create a note in src parent directly (simulating remote create)
	noteNode, fileRec, err := app.notes.Create(srcParent.ID, "RemoteNote", "")
	if err != nil {
		t.Fatalf("create note: %v", err)
	}

	// Verify note file exists in source
	srcFilePath := filepath.Join(vault, fileRec.Path)
	if _, err := os.Stat(srcFilePath); os.IsNotExist(err) {
		t.Fatalf("expected note file at %s", srcFilePath)
	}

	// Simulate remote move op for EntityNote
	op := syncsvc.Op{
		EntityType:  syncsvc.EntityNote,
		EntityID:    noteNode.ID,
		OpType:      syncsvc.OpMove,
		PayloadJSON: fmt.Sprintf(`{"parent_id":"%s","updated_at":"%s"}`, dstParent.ID, time.Now().UTC().Format(time.RFC3339)),
	}
	if err := app.applyRemoteOp(op); err != nil {
		t.Fatalf("apply remote note move: %v", err)
	}

	// Verify node parent_id changed
	n, err := app.nodes.GetActive(noteNode.ID)
	if err != nil {
		t.Fatalf("get moved note: %v", err)
	}
	if n.ParentID == nil || *n.ParentID != dstParent.ID {
		t.Errorf("expected parent_id %s, got %v", dstParent.ID, n.ParentID)
	}

	// Verify file was moved to destination folder
	records, _ := app.files.ListByNode(noteNode.ID)
	if len(records) > 0 {
		expectedNewPath := filepath.Join(dstParent.FsPath, filepath.Base(records[0].Path))
		if records[0].Path != expectedNewPath {
			t.Errorf("expected file path %q, got %q", expectedNewPath, records[0].Path)
		}
		destFilePath := filepath.Join(vault, records[0].Path)
		if _, err := os.Stat(destFilePath); os.IsNotExist(err) {
			t.Errorf("expected file at destination %s", destFilePath)
		}
	}

	// Verify old file no longer exists at source
	if _, err := os.Stat(srcFilePath); !os.IsNotExist(err) {
		t.Error("expected old file to not exist after move")
	}
}

func TestVaultLayout_RemoteFileMoveMovesPhysicalFile(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create source and destination folders
	srcParent, err := app.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("create src parent: %v", err)
	}
	dstParent, err := app.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("create dst parent: %v", err)
	}

	// Create a file node in source parent
	fileNode, err := app.nodes.Create(&srcParent.ID, "file", "testfile.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}
	srcFile := filepath.Join(vault, "src.txt")
	if err := os.WriteFile(srcFile, []byte("test data"), 0o640); err != nil {
		t.Fatalf("write source: %v", err)
	}
	if _, err := app.files.CopyIntoVault(fileNode.ID, srcFile, srcParent.FsPath); err != nil {
		t.Fatalf("copy into vault: %v", err)
	}

	// Verify file exists in source
	records, _ := app.files.ListByNode(fileNode.ID)
	if len(records) == 0 {
		t.Fatal("expected file records")
	}
	oldFilePath := filepath.Join(vault, records[0].Path)
	if _, err := os.Stat(oldFilePath); os.IsNotExist(err) {
		t.Fatalf("expected file at %s", oldFilePath)
	}

	// Simulate remote move op for EntityFile
	op := syncsvc.Op{
		EntityType:  syncsvc.EntityFile,
		EntityID:    fileNode.ID,
		OpType:      syncsvc.OpMove,
		PayloadJSON: fmt.Sprintf(`{"parent_id":"%s","updated_at":"%s"}`, dstParent.ID, time.Now().UTC().Format(time.RFC3339)),
	}
	if err := app.applyRemoteOp(op); err != nil {
		t.Fatalf("apply remote file move: %v", err)
	}

	// Verify node parent_id changed
	n, err := app.nodes.GetActive(fileNode.ID)
	if err != nil {
		t.Fatalf("get moved file: %v", err)
	}
	if n.ParentID == nil || *n.ParentID != dstParent.ID {
		t.Errorf("expected parent_id %s, got %v", dstParent.ID, n.ParentID)
	}

	// Verify file was moved to destination
	records2, _ := app.files.ListByNode(fileNode.ID)
	if len(records2) > 0 {
		expectedNewPath := filepath.Join(dstParent.FsPath, filepath.Base(records2[0].Path))
		if records2[0].Path != expectedNewPath {
			t.Errorf("expected file path %q, got %q", expectedNewPath, records2[0].Path)
		}
		destFilePath := filepath.Join(vault, records2[0].Path)
		if _, err := os.Stat(destFilePath); os.IsNotExist(err) {
			t.Errorf("expected file at destination %s", destFilePath)
		}
	}

	// Verify old file no longer exists
	if _, err := os.Stat(oldFilePath); !os.IsNotExist(err) {
		t.Error("expected old file to not exist after move")
	}
}

func TestVaultLayout_LocalNoteMoveSyncPayloadCanBeAppliedRemotely(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create source and destination parents
	srcParent, err := app.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("create src parent: %v", err)
	}
	dstParent, err := app.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("create dst parent: %v", err)
	}

	// Create a note
	noteNode, _, err := app.notes.Create(srcParent.ID, "MovedNote", "")
	if err != nil {
		t.Fatalf("create note: %v", err)
	}

	// Move the note via MoveNode
	if err := app.MoveNode(noteNode.ID, dstParent.ID); err != nil {
		t.Fatalf("move note: %v", err)
	}

	// Verify local move produced correct sync op
	ops, err := app.sync.GetUnpushedOps()
	if err != nil {
		t.Fatalf("get ops: %v", err)
	}

	var moveOp *syncsvc.Op
	for i := range ops {
		if ops[i].EntityID == noteNode.ID && ops[i].OpType == syncsvc.OpMove {
			moveOp = &ops[i]
			break
		}
	}
	if moveOp == nil {
		t.Fatal("expected move sync op for note")
	}
	if moveOp.EntityType != syncsvc.EntityNote {
		t.Errorf("expected entity type 'note', got %q", moveOp.EntityType)
	}

	// Verify payload has parent_id but no fs_path
	var payload map[string]interface{}
	if err := json.Unmarshal([]byte(moveOp.PayloadJSON), &payload); err != nil {
		t.Fatalf("unmarshal payload: %v", err)
	}
	if pid, ok := payload["parent_id"]; !ok || pid != dstParent.ID {
		t.Errorf("expected parent_id %q in payload, got %v", dstParent.ID, pid)
	}
	if _, ok := payload["fs_path"]; ok {
		t.Error("expected no fs_path in note move payload")
	}

	// Verify note file is at destination
	noteAtDst := filepath.Join(vault, dstParent.FsPath, "MovedNote.md")
	if _, err := os.Stat(noteAtDst); os.IsNotExist(err) {
		t.Errorf("expected note at %s", noteAtDst)
	}

	// Now simulate receiving this same op on another device
	app2, _ := setupTestApp(t)
	defer app2.db.Close()
	defer os.RemoveAll(app2.vault)

	// First create the same nodes on app2 (simulating prior sync)
	// Create src and dst parents
	_, err = app2.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("app2 create src: %v", err)
	}
	_, err = app2.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("app2 create dst: %v", err)
	}
	// Create the same note via remote create
	createOp := syncsvc.Op{
		EntityType:  syncsvc.EntityNote,
		EntityID:    noteNode.ID,
		OpType:      syncsvc.OpCreate,
		PayloadJSON: moveOp.PayloadJSON, // approximate
	}
	// We need proper create payload
	app2NoteCreatePayload := fmt.Sprintf(
		`{"node_id":"%s","file_id":"%s","format":"markdown","content":"# MovedNote\n\n","filename":"MovedNote.md","path":"%s","created_at":"%s","updated_at":"%s"}`,
		noteNode.ID, "test-file-id-1", filepath.Join(srcParent.FsPath, "MovedNote.md"),
		time.Now().UTC().Format(time.RFC3339), time.Now().UTC().Format(time.RFC3339))
	createOp.PayloadJSON = app2NoteCreatePayload

	if err := app2.applyRemoteOp(createOp); err != nil {
		t.Fatalf("app2 apply remote create: %v", err)
	}

	// Now apply the move op on app2
	if err := app2.applyRemoteOp(*moveOp); err != nil {
		t.Fatalf("app2 apply remote move: %v", err)
	}

	// Verify node moved on app2
	app2Node, err := app2.nodes.GetActive(noteNode.ID)
	if err != nil {
		t.Fatalf("app2 get moved node: %v", err)
	}
	if app2Node.ParentID == nil || *app2Node.ParentID != dstParent.ID {
		t.Errorf("app2: expected parent_id %s, got %v", dstParent.ID, app2Node.ParentID)
	}

	// Verify file moved on app2
	app2Records, _ := app2.files.ListByNode(noteNode.ID)
	if len(app2Records) > 0 {
		destPath := filepath.Join(app2.vault, app2Records[0].Path)
		if _, err := os.Stat(destPath); os.IsNotExist(err) {
			t.Errorf("app2: expected file at %s", destPath)
		}
	}
}

func TestVaultLayout_LocalFileMoveSyncPayloadCanBeAppliedRemotely(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create source and destination parents
	srcParent, err := app.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("create src parent: %v", err)
	}
	dstParent, err := app.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("create dst parent: %v", err)
	}

	// Create a file node
	fileNode, err := app.nodes.Create(&srcParent.ID, "file", "movable.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}
	srcFile := filepath.Join(vault, "src_movable.txt")
	if err := os.WriteFile(srcFile, []byte("movable data"), 0o640); err != nil {
		t.Fatalf("write source: %v", err)
	}
	if _, err := app.files.CopyIntoVault(fileNode.ID, srcFile, srcParent.FsPath); err != nil {
		t.Fatalf("copy into vault: %v", err)
	}

	// Move the file via MoveNode
	if err := app.MoveNode(fileNode.ID, dstParent.ID); err != nil {
		t.Fatalf("move file: %v", err)
	}

	// Verify local move produced correct sync op
	ops, err := app.sync.GetUnpushedOps()
	if err != nil {
		t.Fatalf("get ops: %v", err)
	}
	var moveOp *syncsvc.Op
	for i := range ops {
		if ops[i].EntityID == fileNode.ID && ops[i].OpType == syncsvc.OpMove {
			moveOp = &ops[i]
			break
		}
	}
	if moveOp == nil {
		t.Fatal("expected move sync op for file")
	}
	if moveOp.EntityType != syncsvc.EntityFile {
		t.Errorf("expected entity type 'file', got %q", moveOp.EntityType)
	}

	// Verify payload
	var payload map[string]interface{}
	if err := json.Unmarshal([]byte(moveOp.PayloadJSON), &payload); err != nil {
		t.Fatalf("unmarshal payload: %v", err)
	}
	if _, ok := payload["fs_path"]; ok {
		t.Error("expected no fs_path in file move payload")
	}

	// Now simulate receiving this op on another device
	app2, vault2 := setupTestApp(t)
	defer app2.db.Close()
	defer os.RemoveAll(vault2)

	// Create same nodes on app2
	_, err = app2.CreateNodeFromTemplate("", "SrcParent", "folder.default")
	if err != nil {
		t.Fatalf("app2 create src: %v", err)
	}
	_, err = app2.CreateNodeFromTemplate("", "DstParent", "folder.default")
	if err != nil {
		t.Fatalf("app2 create dst: %v", err)
	}

	// Create the file node via remote create
	app2CreatePayload := fmt.Sprintf(
		`{"node_id":"%s","type":"file","title":"movable.txt","slug":"movable-txt","parent_id":"%s","filename":"movable.txt","path":"%s","storage_mode":"vault","size":12,"file_id":"test-file-id-2","created_at":"%s","updated_at":"%s"}`,
		fileNode.ID, srcParent.ID, filepath.Join(srcParent.FsPath, "movable.txt"),
		time.Now().UTC().Format(time.RFC3339), time.Now().UTC().Format(time.RFC3339))
	createOp := syncsvc.Op{
		EntityType:  syncsvc.EntityFile,
		EntityID:    fileNode.ID,
		OpType:      syncsvc.OpCreate,
		PayloadJSON: app2CreatePayload,
	}
	if err := app2.applyRemoteOp(createOp); err != nil {
		t.Fatalf("app2 apply remote create: %v", err)
	}
	// Create the physical file on app2
	os.MkdirAll(filepath.Join(vault2, srcParent.FsPath), 0o750)
	os.WriteFile(filepath.Join(vault2, srcParent.FsPath, "movable.txt"), []byte("movable data"), 0o640)

	// Apply move op on app2
	if err := app2.applyRemoteOp(*moveOp); err != nil {
		t.Fatalf("app2 apply remote move: %v", err)
	}

	// Verify node moved on app2
	app2Node, err := app2.nodes.GetActive(fileNode.ID)
	if err != nil {
		t.Fatalf("app2 get moved node: %v", err)
	}
	if app2Node.ParentID == nil || *app2Node.ParentID != dstParent.ID {
		t.Errorf("app2: expected parent_id %s, got %v", dstParent.ID, app2Node.ParentID)
	}

	// Verify file moved on app2
	app2Records, _ := app2.files.ListByNode(fileNode.ID)
	if len(app2Records) > 0 {
		destPath := filepath.Join(vault2, app2Records[0].Path)
		if _, err := os.Stat(destPath); os.IsNotExist(err) {
			t.Errorf("app2: expected file at %s", destPath)
		}
	}
}

func TestVaultLayout_RenameNoteFileReturnsErrorIfPhysicalFileMissing(t *testing.T) {
	app, _ := setupTestApp(t)

	parent, err := app.CreateNodeFromTemplate("", "Parent", "folder.default")
	if err != nil {
		t.Fatalf("create parent: %v", err)
	}

	// Create a note
	noteNode, fileRec, err := app.notes.Create(parent.ID, "TestNote", "")
	if err != nil {
		t.Fatalf("create note: %v", err)
	}

	// Delete the physical file
	physPath := filepath.Join(app.vault, fileRec.Path)
	if err := os.Remove(physPath); err != nil {
		t.Fatalf("remove note file: %v", err)
	}

	// Rename should fail because physical file is missing
	if err := app.RenameNode(noteNode.ID, "RenamedNote"); err == nil {
		t.Error("expected error when renaming note with missing physical file")
	}

	// Create a file node
	fileNode, err := app.nodes.Create(&parent.ID, "file", "testfile.txt", 0, "", "")
	if err != nil {
		t.Fatalf("create file node: %v", err)
	}
	srcFile := filepath.Join(app.vault, "src_for_test.txt")
	if err := os.WriteFile(srcFile, []byte("data"), 0o640); err != nil {
		t.Fatalf("write source: %v", err)
	}
	if _, err := app.files.CopyIntoVault(fileNode.ID, srcFile, parent.FsPath); err != nil {
		t.Fatalf("copy into vault: %v", err)
	}

	// Delete the physical file
	fileRecs, _ := app.files.ListByNode(fileNode.ID)
	if len(fileRecs) > 0 {
		filePhysPath := filepath.Join(app.vault, fileRecs[0].Path)
		if err := os.Remove(filePhysPath); err != nil {
			t.Fatalf("remove file: %v", err)
		}
	}

	// Rename should fail
	if err := app.RenameNode(fileNode.ID, "renamed.txt"); err == nil {
		t.Error("expected error when renaming file with missing physical file")
	}
}

func TestVaultLayout_FolderRenameDoesNotUpdateDBIfOsRenameFails(t *testing.T) {
	app, vault := setupTestApp(t)

	// Create a parent folder that we'll make read-only
	parent, err := app.CreateNodeFromTemplate("", "TestRoot", "folder.default")
	if err != nil {
		t.Fatalf("create parent: %v", err)
	}

	// Create a child folder inside TestRoot
	child, err := app.CreateNodeFromTemplate(parent.ID, "OriginalName", "folder.default")
	if err != nil {
		t.Fatalf("create child: %v", err)
	}
	oldTitle := child.Title
	oldFsPath := child.FsPath

	// Verify physical folder exists
	if _, err := os.Stat(filepath.Join(vault, oldFsPath)); os.IsNotExist(err) {
		t.Fatalf("expected child folder at %s", oldFsPath)
	}

	// Make TestRoot read-only to cause os.Rename to fail
	parentPhysPath := filepath.Join(vault, parent.FsPath)
	if err := os.Chmod(parentPhysPath, 0o555); err != nil {
		t.Fatalf("chmod parent: %v", err)
	}
	// Restore permissions on cleanup
	defer os.Chmod(parentPhysPath, 0o755)

	// Rename should fail because parent is read-only
	if err := app.RenameNode(child.ID, "RenamedName"); err == nil {
		t.Error("expected error when renaming folder in read-only directory")
	}

	// Verify DB was NOT updated
	n, err := app.nodes.GetActive(child.ID)
	if err != nil {
		t.Fatalf("get child: %v", err)
	}
	if n.Title != oldTitle {
		t.Errorf("expected title %q unchanged, got %q", oldTitle, n.Title)
	}
	if n.FsPath != oldFsPath {
		t.Errorf("expected fs_path %q unchanged, got %q", oldFsPath, n.FsPath)
	}

	// Verify physical folder still at old location
	if _, err := os.Stat(filepath.Join(vault, oldFsPath)); os.IsNotExist(err) {
		t.Error("expected original folder to still exist")
	}
}

// --- helpers ---

func listNames(entries []os.DirEntry) []string {
	var names []string
	for _, e := range entries {
		names = append(names, e.Name())
	}
	return names
}

func contains(s, substr string) bool {
	return len(s) >= len(substr) && containsStr(s, substr)
}

func containsStr(s, substr string) bool {
	for i := 0; i <= len(s)-len(substr); i++ {
		if s[i:i+len(substr)] == substr {
			return true
		}
	}
	return false
}