package main

import (
	"context"
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
	"sort"
	"strings"
	"time"

	wailsruntime "github.com/wailsapp/wails/v2/pkg/runtime"

	"verstak/internal/core/actions"
	"verstak/internal/core/activity"
	"verstak/internal/core/files"
	"verstak/internal/core/notes"
	"verstak/internal/core/nodes"
	"verstak/internal/core/search"
	"verstak/internal/core/storage"
	"verstak/internal/core/worklog"
)



// App is the Wails v2 application adapter. It wraps core services.
type App struct {
	ctx     context.Context
	db      *storage.DB
	nodes   *nodes.Repository
	files   *files.Service
	notes   *notes.Service
	activity *activity.Service
	actions *actions.Service
	worklog *worklog.Service
	search  *search.Service
	vault   string
}

// startup is called when the app starts. Store context and wire drag-and-drop.
func (a *App) startup(ctx context.Context) {
	a.ctx = ctx
	wailsruntime.OnFileDrop(ctx, func(x, y int, paths []string) {
		if len(paths) > 0 {
			wailsruntime.EventsEmit(ctx, "files-dropped", paths)
		}
	})
}

// ============================================================
// DTOs
// ============================================================

type NodeDTO struct {
	ID        string `json:"id"`
	ParentID  string `json:"parentId"`
	Title     string `json:"title"`
	Type      string `json:"type"`
	Section   string `json:"section"`
	Path      string `json:"path"`
	CreatedAt string `json:"createdAt"`
}

type SectionDTO struct {
	ID    string `json:"id"`
	Label string `json:"label"`
}

type NoteDTO struct {
	ID        string `json:"id"`
	Title     string `json:"title"`
	Content   string `json:"content"`
	Format    string `json:"format"`
	CreatedAt string `json:"createdAt"`
}

type FileDTO struct {
	ID       string `json:"id"`
	NodeID   string `json:"nodeId"`
	Name     string `json:"name"`
	Path     string `json:"path"`
	Size     int64  `json:"size"`
	Mime     string `json:"mime"`
	IsDir    bool   `json:"isDir"`
	Missing  bool   `json:"missing"`
}

type FileTreeItemDTO struct {
	ID     string `json:"id"`
	Name   string `json:"name"`
	Type   string `json:"type"` // "folder" | "file"
	FileID string `json:"fileId,omitempty"`
	Size   int64  `json:"size,omitempty"`
	Mime   string `json:"mime,omitempty"`
	HasKids bool  `json:"hasKids"`
}

type ActionDTO struct {
	ID     string `json:"id"`
	NodeID string `json:"nodeId"`
	Title  string `json:"title"`
	Type   string `json:"type"`
	Data   string `json:"data"`
}

type WorklogDTO struct {
	ID        string `json:"id"`
	NodeID    string `json:"nodeId"`
	Summary   string `json:"summary"`
	Minutes   int    `json:"minutes"`
	CreatedAt string `json:"createdAt"`
}

type SearchResultDTO struct {
	NodeID  string `json:"nodeId"`
	Title   string `json:"title"`
	Snippet string `json:"snippet"`
	Type    string `json:"type"`
}

type EventDTO struct {
	ID        string `json:"id"`
	NodeID    string `json:"nodeId"`
	ParentID  string `json:"parentId"`
	EventType string `json:"eventType"`
	Title     string `json:"title"`
	Metadata  string `json:"metadata"`
	CreatedAt string `json:"createdAt"`
}

type CaseActivityDTO struct {
	Node   NodeDTO    `json:"node"`
	Events []EventDTO `json:"events"`
}

type SummaryDTO struct {
	ChangedCases int `json:"changedCases"`
	Notes        int `json:"notes"`
	Files        int `json:"files"`
	Actions      int `json:"actions"`
	TimeEntries  int `json:"timeEntries"`
}

type TodayGroupDTO struct {
	NodeID         string     `json:"nodeId"`
	NodeTitle      string     `json:"nodeTitle"`
	NodeKind       string     `json:"nodeKind"`
	Section        string     `json:"section"`
	LastActivityAt string     `json:"lastActivityAt"`
	Events         []EventDTO `json:"events"`
}

type TodayDashboardDTO struct {
	Date    string           `json:"date"`
	Summary SummaryDTO        `json:"summary"`
	Groups  []TodayGroupDTO  `json:"groups"`
	Events  []EventDTO       `json:"events"`
}

// ============================================================
// Sections
// ============================================================

func (a *App) ListSections() []SectionDTO {
	return []SectionDTO{
		{ID: "today", Label: "Сегодня"},
		{ID: "inbox", Label: "Неразобранное"},
		{ID: "clients", Label: "Клиенты"},
		{ID: "projects", Label: "Проекты"},
		{ID: "recipes", Label: "Рецепты"},
		{ID: "documents", Label: "Документы"},
		{ID: "archive", Label: "Архив"},
	}
}

// ============================================================
// Nodes
// ============================================================

func (a *App) ListNodesBySection(section string) ([]NodeDTO, error) {
	list, err := a.nodes.ListRoots(false, section)
	if err != nil {
		return nil, err
	}
	return toNodeDTOs(list), nil
}

// ListTodayView returns a dashboard of today's activity.
func (a *App) ListTodayView() (*TodayDashboardDTO, error) {
	start, end := activity.TodayBoundaries()

	// 1. Collect events from activity_events table.
	aeByParent, err := a.activity.ListTodayEventsByParent()
	if err != nil {
		aeByParent = nil
	}

	// 2. Query notes created/updated today directly from nodes.
	type noteRow struct {
		ID        string
		ParentID  string
		Title     string
		CreatedAt string
	}
	var todayNotes []noteRow
	if r, err := a.db.Query(`SELECT n.id, COALESCE(n.parent_id,''), n.title, n.created_at
		FROM nodes n
		WHERE n.deleted_at IS NULL AND n.type='note'
		AND ((n.created_at >= ?1 AND n.created_at < ?2) OR (n.updated_at >= ?1 AND n.updated_at < ?2))`,
		start, end); err == nil {
		for r.Next() {
			var nr noteRow
			if err := r.Scan(&nr.ID, &nr.ParentID, &nr.Title, &nr.CreatedAt); err == nil {
				todayNotes = append(todayNotes, nr)
			}
		}
		r.Close()
	}

	// 3. Query files created today from files table.
	type fileRow struct {
		ID        string
		NodeID    string
		Filename  string
		ParentID  string
		CreatedAt string
	}
	var todayFiles []fileRow
	if r, err := a.db.Query(`SELECT f.id, f.node_id, f.filename, COALESCE(n.parent_id,''), f.created_at
		FROM files f
		JOIN nodes n ON f.node_id = n.id
		WHERE n.deleted_at IS NULL
		AND (f.created_at >= ?1 AND f.created_at < ?2)`, start, end); err == nil {
		for r.Next() {
			var fr fileRow
			if err := r.Scan(&fr.ID, &fr.NodeID, &fr.Filename, &fr.ParentID, &fr.CreatedAt); err == nil {
				todayFiles = append(todayFiles, fr)
			}
		}
		r.Close()
	}

	// Also include files updated today (but not created today).
	if r, err := a.db.Query(`SELECT f.id, f.node_id, f.filename, COALESCE(n.parent_id,''), f.updated_at
		FROM files f
		JOIN nodes n ON f.node_id = n.id
		WHERE n.deleted_at IS NULL
		AND f.updated_at >= ?1 AND f.updated_at < ?2
		AND f.created_at < ?1`, start, end); err == nil {
		for r.Next() {
			var fr fileRow
			if err := r.Scan(&fr.ID, &fr.NodeID, &fr.Filename, &fr.ParentID, &fr.CreatedAt); err == nil {
				todayFiles = append(todayFiles, fr)
			}
		}
		r.Close()
	}

	// 4. Get root nodes that were created/updated today.
	todayNodes, _ := a.nodes.ListTodayNodes()

	// Build caseID → events map from all sources.
	type rawEvent struct {
		NodeID    string
		ParentID  string
		EventType string
		Title     string
		CreatedAt string
	}
	type caseInfo struct {
		Node   nodes.Node
		Events []rawEvent
	}
	caseMap := make(map[string]*caseInfo)

	// Helper: ensure case entry exists.
	ensureCase := func(caseID string) *caseInfo {
		if ci, ok := caseMap[caseID]; ok {
			return ci
		}
		ci := &caseInfo{Events: nil}
		if n, err := a.nodes.GetActive(caseID); err == nil {
			ci.Node = *n
		}
		caseMap[caseID] = ci
		return ci
	}

	// Merge activity_events.
	for pid, events := range aeByParent {
		ci := ensureCase(pid)
		for _, e := range events {
			ci.Events = append(ci.Events, rawEvent{
				NodeID:    e.NodeID,
				ParentID:  pid,
				EventType: e.EventType,
				Title:     e.Title,
				CreatedAt: e.CreatedAt,
			})
		}
	}

	// Merge notes from direct query (avoid duplicates with ae).
	noteSeen := make(map[string]bool)
	for _, nr := range todayNotes {
		if noteSeen[nr.ID] {
			continue
		}
		noteSeen[nr.ID] = true
		caseID := nr.ParentID
		ci := ensureCase(caseID)
		ci.Events = append(ci.Events, rawEvent{
			NodeID:    nr.ID,
			ParentID:  caseID,
			EventType: activity.TypeNoteCreated,
			Title:     nr.Title,
			CreatedAt: nr.CreatedAt,
		})
	}

	// Merge files.
	fileSeen := make(map[string]bool)
	for _, fr := range todayFiles {
		if fileSeen[fr.ID] {
			continue
		}
		fileSeen[fr.ID] = true
		caseID := fr.ParentID
		ci := ensureCase(caseID)
		ci.Events = append(ci.Events, rawEvent{
			NodeID:    fr.NodeID,
			ParentID:  caseID,
			EventType: activity.TypeFileAdded,
			Title:     fr.Filename,
			CreatedAt: fr.CreatedAt,
		})
	}

	// Merge today's root nodes (even without events).
	for _, n := range todayNodes {
		_ = ensureCase(n.ID)
		if ci := caseMap[n.ID]; ci.Node.ID == "" {
			ci.Node = n
		}
	}

	// Build final groups and flat timeline.
	var groups []TodayGroupDTO
	var flatEvents []EventDTO
	summary := SummaryDTO{}

	for _, ci := range caseMap {
		if ci.Node.ID == "" {
			continue
		}
		summary.ChangedCases++

		dtoEvents := make([]EventDTO, 0, len(ci.Events))
		for _, re := range ci.Events {
			et := re.EventType
			dtoEvents = append(dtoEvents, EventDTO{
				ID:        ci.Node.ID + "/" + re.NodeID,
				NodeID:    re.NodeID,
				ParentID:  re.ParentID,
				EventType: et,
				Title:     re.Title,
				Metadata:  "{}",
				CreatedAt: re.CreatedAt,
			})
			switch et {
			case activity.TypeNoteCreated, activity.TypeNoteUpdated:
				summary.Notes++
			case activity.TypeFileAdded, activity.TypeFileDeleted, activity.TypeFileRenamed, activity.TypeFileCopied, activity.TypeFileMoved:
				summary.Files++
			}
		}

		last := ci.Node.UpdatedAt.Format(time.RFC3339)
		if len(dtoEvents) > 0 {
			for _, e := range dtoEvents {
				if e.CreatedAt > last {
					last = e.CreatedAt
				}
			}
		}

		groups = append(groups, TodayGroupDTO{
			NodeID:         ci.Node.ID,
			NodeTitle:      ci.Node.Title,
			NodeKind:       ci.Node.Type,
			Section:        ci.Node.Section,
			LastActivityAt: last,
			Events:         dtoEvents,
		})

		flatEvents = append(flatEvents, dtoEvents...)
	}

	// Sort groups by lastActivityAt desc.
	sort.Slice(groups, func(i, j int) bool {
		return groups[i].LastActivityAt > groups[j].LastActivityAt
	})

	// Sort flat events by createdAt desc.
	sort.Slice(flatEvents, func(i, j int) bool {
		return flatEvents[i].CreatedAt > flatEvents[j].CreatedAt
	})

	dateStr := time.Now().Format("2006-01-02")

	return &TodayDashboardDTO{
		Date:    dateStr,
		Summary: summary,
		Groups:  groups,
		Events:  flatEvents,
	}, nil
}

func (a *App) ListChildren(parentID string) ([]NodeDTO, error) {
	list, err := a.nodes.ListChildren(parentID, false)
	if err != nil {
		return nil, err
	}
	return toNodeDTOs(list), nil
}

func (a *App) GetNodeDetail(nodeID string) (*NodeDTO, error) {
	n, err := a.nodes.GetActive(nodeID)
	if err != nil {
		return nil, err
	}
	dto := toNodeDTO(n)
	return &dto, nil
}

func (a *App) CreateNode(parentID, nodeType, title, section string) (*NodeDTO, error) {
	if section == "today" || section == "inbox" {
		return nil, fmt.Errorf("cannot create node with section %q", section)
	}
	n, err := a.nodes.Create(parentID, nodeType, title, section)
	if err != nil {
		return nil, err
	}
	_ = a.activity.Record(n.ID, parentID, activity.TypeNodeCreated, title, "")
	dto := toNodeDTO(n)
	return &dto, nil
}

func (a *App) DeleteNode(id string) error {
	return a.nodes.SoftDelete(id)
}

// ============================================================
// Notes
// ============================================================

// ListNotes returns note-type children of a node.
func (a *App) ListNotes(nodeID string) ([]NodeDTO, error) {
	children, err := a.nodes.ListChildren(nodeID, false)
	if err != nil {
		return nil, err
	}
	var result []NodeDTO
	for i := range children {
		if children[i].Type == nodes.TypeNote {
			result = append(result, toNodeDTO(&children[i]))
		}
	}
	return result, nil
}

// CreateNote creates a note under a parent node.
func (a *App) CreateNote(parentID, title string) (*NodeDTO, error) {
	node, _, err := a.notes.Create(parentID, title, "")
	if err != nil {
		return nil, err
	}
	_ = a.activity.Record(node.ID, parentID, activity.TypeNoteCreated, title, "")
	dto := toNodeDTO(node)
	return &dto, nil
}

// ReadNote reads note content.
func (a *App) ReadNote(noteID string) (string, error) {
	return a.notes.Read(noteID)
}

// SaveNote saves note content.
func (a *App) SaveNote(noteID, content string) error {
	if err := a.notes.Save(noteID, content); err != nil {
		return err
	}
	// Record note_updated event.
	if n, err := a.nodes.GetActive(noteID); err == nil {
		pid := ""
		if n.ParentID != nil {
			pid = *n.ParentID
		}
		_ = a.activity.Record(noteID, pid, activity.TypeNoteUpdated, n.Title, "")
	}
	return nil
}

// ============================================================
// Files
// ============================================================

// ListFiles returns file records directly linked to a node (non-recursive).
func (a *App) ListFiles(nodeID string) ([]FileDTO, error) {
	records, err := a.files.ListByNode(nodeID)
	if err != nil {
		return nil, err
	}
	result := make([]FileDTO, len(records))
	for i := range records {
		rec := &records[i]
		result[i] = FileDTO{
			ID:      rec.ID,
			NodeID:  rec.NodeID,
			Name:    rec.Filename,
			Path:    rec.Path,
			Size:    rec.Size,
			Mime:    rec.MIME,
			IsDir:   rec.MIME == "inode/directory",
			Missing: rec.Missing,
		}
	}
	return result, nil
}

// ListItems returns children of a node for the file tree view.
// Folders can be expanded; files include their file record info.
func (a *App) ListItems(nodeID string) ([]FileTreeItemDTO, error) {
	children, err := a.nodes.ListChildren(nodeID, false)
	if err != nil {
		return nil, err
	}
	result := make([]FileTreeItemDTO, 0, len(children))
	for i := range children {
		if children[i].Type != nodes.TypeFolder && children[i].Type != nodes.TypeFile {
			continue
		}
		item := FileTreeItemDTO{
			ID:   children[i].ID,
			Name: children[i].Title,
			Type: children[i].Type,
		}
		if children[i].Type == nodes.TypeFolder {
			// Check if this folder has children
			kids, _ := a.nodes.ListChildren(children[i].ID, false)
			item.HasKids = len(kids) > 0
		} else if children[i].Type == nodes.TypeFile {
			records, _ := a.files.ListByNode(children[i].ID)
			if len(records) > 0 {
				item.FileID = records[0].ID
				item.Size = records[0].Size
				item.Mime = records[0].MIME
			}
		}
		result = append(result, item)
	}
	return result, nil
}

func (a *App) AddPathCopy(nodeID, sourcePath string) ([]NodeDTO, error) {
	nodes, err := a.files.AddPathCopy(nodeID, sourcePath)
	if err != nil {
		return nil, err
	}
	for _, n := range nodes {
		_ = a.activity.Record(n.ID, nodeID, activity.TypeFileAdded, n.Title, `{"source":"`+sourcePath+`"}`)
	}
	return toNodeDTOs(nodes), nil
}

func (a *App) AddPathLink(nodeID, sourcePath string) ([]NodeDTO, error) {
	nodes, err := a.files.AddPathLink(nodeID, sourcePath)
	if err != nil {
		return nil, err
	}
	for _, n := range nodes {
		_ = a.activity.Record(n.ID, nodeID, activity.TypeFileAdded, n.Title, `{"source":"`+sourcePath+`"}`)
	}
	return toNodeDTOs(nodes), nil
}

func (a *App) DeleteFileOrFolder(nodeID string) error {
	n, err := a.nodes.GetActive(nodeID)
	if err == nil {
		pid := ""
		if n.ParentID != nil {
			pid = *n.ParentID
		}
		evType := activity.TypeFileDeleted
		if n.Type == nodes.TypeFolder {
			evType = activity.TypeFolderDeleted
		}
		_ = a.activity.Record(nodeID, pid, evType, n.Title, "")
	}
	return a.files.DeleteNodeAndChildren(nodeID)
}

func (a *App) CreateEmptyFile(parentID, filename string) (*NodeDTO, error) {
	node, err := a.files.CreateEmptyFile(parentID, filename)
	if err != nil {
		return nil, err
	}
	_ = a.activity.Record(node.ID, parentID, activity.TypeFileAdded, filename, "")
	dto := toNodeDTO(node)
	return &dto, nil
}

func (a *App) DuplicateNode(nodeID string) (*NodeDTO, error) {
	node, err := a.files.Duplicate(nodeID)
	if err != nil {
		return nil, err
	}
	// Find parent for recording
	n, err2 := a.nodes.GetActive(nodeID)
	pid := ""
	if err2 == nil && n.ParentID != nil {
		pid = *n.ParentID
	}
	_ = a.activity.Record(node.ID, pid, activity.TypeFileCopied, node.Title, "")
	dto := toNodeDTO(node)
	return &dto, nil
}

func (a *App) RenameNode(nodeID, newTitle string) error {
	n, err := a.nodes.GetActive(nodeID)
	if err != nil {
		return err
	}
	oldTitle := n.Title
	if err := a.nodes.UpdateTitle(nodeID, newTitle); err != nil {
		return err
	}
	pid := ""
	if n.ParentID != nil {
		pid = *n.ParentID
	}
	evType := activity.TypeFileRenamed
	if n.Type == nodes.TypeFolder {
		evType = activity.TypeFolderRenamed
	}
	_ = a.activity.Record(nodeID, pid, evType, newTitle, `{"from":"`+oldTitle+`","to":"`+newTitle+`"}`)
	return nil
}

func (a *App) ValidateName(name string) error {
	return files.ValidateName(name)
}

func (a *App) MoveNode(nodeID, newParentID string) error {
	// Check for name conflict at destination
	destChildren, err := a.nodes.ListChildren(newParentID, false)
	if err != nil {
		return err
	}
	node, err := a.nodes.GetActive(nodeID)
	if err != nil {
		return err
	}
	for i := range destChildren {
		if destChildren[i].Title == node.Title {
			// Conflict: auto-rename
			newName := a.files.UniqueTitleCopy(newParentID, node.Title)
			if err := a.nodes.UpdateTitle(nodeID, newName); err != nil {
				return err
			}
			break
		}
	}
	if err := a.nodes.Move(nodeID, newParentID, 0); err != nil {
		return err
	}
	pid := ""
	if node.ParentID != nil {
		pid = *node.ParentID
	}
	_ = a.activity.Record(nodeID, pid, activity.TypeFileMoved, node.Title, `{"to":"`+newParentID+`"}`)
	return nil
}

func (a *App) PreviewImport(sourcePath string) (*files.ImportSummary, error) {
	return a.files.PreviewImport(sourcePath)
}

// ============================================================
// Actions
// ============================================================

func (a *App) ListActions(nodeID string) ([]ActionDTO, error) {
	list, err := a.actions.ListByNode(nodeID)
	if err != nil {
		return nil, err
	}
	result := make([]ActionDTO, len(list))
	for i := range list {
		data := list[i].Command
		if list[i].URL != "" {
			data = list[i].URL
		}
		result[i] = ActionDTO{
			ID:     list[i].ID,
			NodeID: list[i].NodeID,
			Title:  list[i].Title,
			Type:   list[i].Kind,
			Data:   data,
		}
	}
	return result, nil
}

func (a *App) RunAction(id string) error {
	_, err := a.actions.Run(id)
	return err
}

// ============================================================
// Worklog
// ============================================================

func (a *App) ListWorklog(nodeID string) ([]WorklogDTO, error) {
	list, err := a.worklog.ListByNode(nodeID)
	if err != nil {
		return nil, err
	}
	result := make([]WorklogDTO, len(list))
	for i := range list {
		mins := 0
		if list[i].Minutes != nil {
			mins = *list[i].Minutes
		}
		result[i] = WorklogDTO{
			ID:        list[i].ID,
			NodeID:    list[i].NodeID,
			Summary:   list[i].Summary,
			Minutes:   mins,
			CreatedAt: list[i].CreatedAt.Format("2006-01-02T15:04:05Z"),
		}
	}
	return result, nil
}

func (a *App) CreateWorklog(nodeID, summary string, minutes int) (*WorklogDTO, error) {
	entry, err := a.worklog.Add(nodeID, summary, "", minutes, false, false)
	if err != nil {
		return nil, err
	}
	mins := 0
	if entry.Minutes != nil {
		mins = *entry.Minutes
	}
	dto := &WorklogDTO{
		ID:        entry.ID,
		NodeID:    entry.NodeID,
		Summary:   entry.Summary,
		Minutes:   mins,
		CreatedAt: entry.CreatedAt.Format("2006-01-02T15:04:05Z"),
	}
	return dto, nil
}

// ============================================================
// Search
// ============================================================

func (a *App) Search(query string) ([]SearchResultDTO, error) {
	if strings.TrimSpace(query) == "" {
		return []SearchResultDTO{}, nil
	}
	results, err := a.search.Search(query)
	if err != nil {
		return nil, err
	}
	out := make([]SearchResultDTO, len(results))
	for i, r := range results {
		out[i] = SearchResultDTO{
			NodeID:  r.NodeID,
			Title:   r.Title,
			Snippet: r.Snippet,
			Type:    r.Type,
		}
	}
	return out, nil
}

// ============================================================
// File Dialogs (Wails v2 Runtime)
// ============================================================

func (a *App) PickFile() (string, error) {
	return wailsruntime.OpenFileDialog(a.ctx, wailsruntime.OpenDialogOptions{
		Title: "Выберите файл",
	})
}

func (a *App) PickFiles() ([]string, error) {
	return wailsruntime.OpenMultipleFilesDialog(a.ctx, wailsruntime.OpenDialogOptions{
		Title: "Выберите файлы",
	})
}

func (a *App) PickDirectory() (string, error) {
	return wailsruntime.OpenDirectoryDialog(a.ctx, wailsruntime.OpenDialogOptions{
		Title: "Выберите папку",
	})
}

// ============================================================
// System helpers
// ============================================================

func (a *App) OpenFile(fileID string) error {
	return a.files.Open(fileID)
}

func (a *App) ReadFileText(fileID string) (string, error) {
	return a.files.ReadText(fileID)
}

func (a *App) GetFileBase64(fileID string) (string, error) {
	return a.files.ReadBase64(fileID)
}

func (a *App) OpenFolder(nodeID string) error {
	n, err := a.nodes.GetActive(nodeID)
	if err != nil {
		return fmt.Errorf("get node: %w", err)
	}
	dir := filepath.Join(a.vault, "spaces", n.Slug)
	if _, err := os.Stat(dir); os.IsNotExist(err) {
		dir = a.vault
	}
	cmd := exec.Command("xdg-open", dir)
	return cmd.Run()
}

func (a *App) VerstakVersion() string {
	return "verstak-gui/v2"
}

// ============================================================
// Helpers
// ============================================================

func toNodeDTO(n *nodes.Node) NodeDTO {
	parentID := ""
	if n.ParentID != nil {
		parentID = *n.ParentID
	}
	path := ""
	if n.Path != nil {
		path = *n.Path
	}
	return NodeDTO{
		ID:        n.ID,
		ParentID:  parentID,
		Title:     n.Title,
		Type:      n.Type,
		Section:   n.Section,
		Path:      path,
		CreatedAt: n.CreatedAt.Format("2006-01-02T15:04:05Z"),
	}
}

func toNodeDTOs(list []nodes.Node) []NodeDTO {
	result := make([]NodeDTO, len(list))
	for i := range list {
		result[i] = toNodeDTO(&list[i])
	}
	return result
}