# All files / src/hooks useNoteActions.ts

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     import { useCallback, useRef } from 'react'
    import { invoke } from '@tauri-apps/api/core'
    import { isTauri, mockInvoke, addMockEntry, updateMockContent } from '../mock-tauri'
    import type { VaultEntry } from '../types'
    import type { FrontmatterValue } from '../components/Inspector'
    import { useTabManagement } from './useTabManagement'
    import { updateMockFrontmatter, deleteMockFrontmatterProperty } from './mockFrontmatterHelpers'

    interface NewEntryParams {
      path: string
      slug: string
      title: string
      type: string
      status: string | null
    }

    interface RenameResult {
      new_path: string
      updated_files: number
    }

    export interface NoteActionsConfig {
      addEntry: (entry: VaultEntry, content: string) => void
      removeEntry: (path: string) => void
      updateContent: (path: string, content: string) => void
      entries: VaultEntry[]
      setToastMessage: (msg: string | null) => void
      updateEntry: (path: string, patch: Partial<VaultEntry>) => void
    }

    async function performRename(
      path: string,
      newTitle: string,
      vaultPath: string,
    ): Promise<RenameResult> {
      if (isTauri()) {
        return invoke<RenameResult>('rename_note', { vaultPath, oldPath: path, newTitle })
      }
      return mockInvoke<RenameResult>('rename_note', { vault_path: vaultPath, old_path: path, new_title: newTitle })
    }

    function buildRenamedEntry(entry: VaultEntry, newTitle: string, newPath: string): VaultEntry {
      const slug = newTitle.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '')
      return { ...entry, path: newPath, filename: `${slug}.md`, title: newTitle }
    }

    async function loadNoteContent(path: string): Promise<string> {
      return isTauri()
        ? invoke<string>('get_note_content', { path })
        : mockInvoke<string>('get_note_content', { path })
    }

    /** Persist a newly created note to disk. Returns a Promise for error handling. */
    function persistNewNote(path: string, content: string): Promise<void> {
      if (!isTauri()) return Promise.resolve()
      return invoke<void>('save_note_content', { path, content }).then(() => {})
    }

    export function buildNewEntry({ path, slug, title, type, status }: NewEntryParams): VaultEntry {
      const now = Math.floor(Date.now() / 1000)
      return {
        path, filename: `${slug}.md`, title, isA: type,
        aliases: [], belongsTo: [], relatedTo: [],
        status, owner: null, cadence: null, archived: false, trashed: false, trashedAt: null,
        modifiedAt: now, createdAt: now, fileSize: 0,
        snippet: '', relationships: {}, icon: null, color: null, order: null, outgoingLinks: [],
      }
    }

    export function slugify(text: string): string {
      return text.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '')
    }

    /** Generate a unique "Untitled <type>" name by checking existing entries and pending names. */
    export function generateUntitledName(entries: VaultEntry[], type: string, pending?: Set<string>): string {
      const baseName = `Untitled ${type.toLowerCase()}`
      const existingTitles = new Set(entries.map(e => e.title))
      if (pending) pending.forEach(n => existingTitles.add(n))
      let title = baseName
      let counter = 2
      while (existingTitles.has(title)) {
        title = `${baseName} ${counter}`
        counter++
      }
      return title
    }

    export function entryMatchesTarget(e: VaultEntry, targetLower: string, targetAsWords: string): boolean {
      if (e.title.toLowerCase() === targetLower) return true
      if (e.aliases.some((a) => a.toLowerCase() === targetLower)) return true
      const pathStem = e.path.replace(/^.*\/Laputa\//, '').replace(/\.md$/, '')
      if (pathStem.toLowerCase() === targetLower) return true
      const fileStem = e.filename.replace(/\.md$/, '')
      if (fileStem.toLowerCase() === targetLower.split('/').pop()) return true
      return e.title.toLowerCase() === targetAsWords
    }

    async function invokeFrontmatter(command: string, args: Record<string, unknown>): Promise<string> {
      return invoke<string>(command, args)
    }

    function applyMockFrontmatterUpdate(path: string, key: string, value: FrontmatterValue): string {
      const content = updateMockFrontmatter(path, key, value)
      updateMockContent(path, content)
      return content
    }

    function applyMockFrontmatterDelete(path: string, key: string): string {
      const content = deleteMockFrontmatterProperty(path, key)
      updateMockContent(path, content)
      return content
    }

    const TYPE_FOLDER_MAP: Record<string, string> = {
      Note: 'note', Project: 'project', Experiment: 'experiment',
      Responsibility: 'responsibility', Procedure: 'procedure',
      Person: 'person', Event: 'event', Topic: 'topic',
    }

    const NO_STATUS_TYPES = new Set(['Topic', 'Person'])

    const ENTRY_DELETE_MAP: Record<string, Partial<VaultEntry>> = {
      type: { isA: null }, is_a: { isA: null }, status: { status: null }, color: { color: null },
      icon: { icon: null }, owner: { owner: null }, cadence: { cadence: null },
      aliases: { aliases: [] }, belongs_to: { belongsTo: [] }, related_to: { relatedTo: [] },
      archived: { archived: false }, trashed: { trashed: false }, order: { order: null },
    }

    /** Map a frontmatter key+value to the corresponding VaultEntry field(s). */
    export function frontmatterToEntryPatch(
      op: 'update' | 'delete', key: string, value?: FrontmatterValue,
    ): Partial<VaultEntry> {
      const k = key.toLowerCase().replace(/\s+/g, '_')
      if (op === 'delete') return ENTRY_DELETE_MAP[k] ?? {}
      const str = value != null ? String(value) : null
      const arr = Array.isArray(value) ? value.map(String) : []
      const updates: Record<string, Partial<VaultEntry>> = {
        type: { isA: str }, is_a: { isA: str }, status: { status: str }, color: { color: str },
        icon: { icon: str }, owner: { owner: str }, cadence: { cadence: str },
        aliases: { aliases: arr }, belongs_to: { belongsTo: arr }, related_to: { relatedTo: arr },
        archived: { archived: Boolean(value) }, trashed: { trashed: Boolean(value) },
        order: { order: typeof value === 'number' ? value : null },
      }
      return updates[k] ?? {}
    }

    function addEntryWithMock(entry: VaultEntry, content: string, addEntry: (e: VaultEntry, c: string) => void) {
      if (!isTauri()) addMockEntry(entry, content)
      addEntry(entry, content)
    }

    export function buildNoteContent(title: string, type: string, status: string | null): string {
      const lines = ['---', `title: ${title}`, `type: ${type}`]
      if (status) lines.push(`status: ${status}`)
      lines.push('---')
      return `${lines.join('\n')}\n\n# ${title}\n\n`
    }

    export function resolveNewNote(title: string, type: string): { entry: VaultEntry; content: string } {
      const folder = TYPE_FOLDER_MAP[type] || slugify(type)
      const slug = slugify(title)
      const status = NO_STATUS_TYPES.has(type) ? null : 'Active'
      const entry = buildNewEntry({ path: `/Users/luca/Laputa/${folder}/${slug}.md`, slug, title, type, status })
      return { entry, content: buildNoteContent(title, type, status) }
    }

    export function resolveNewType(typeName: string): { entry: VaultEntry; content: string } {
      const slug = slugify(typeName)
      const entry = buildNewEntry({ path: `/Users/luca/Laputa/type/${slug}.md`, slug, title: typeName, type: 'Type', status: null })
      return { entry, content: `---\ntype: Type\n---\n\n# ${typeName}\n\n` }
    }

    function findWikilinkTarget(entries: VaultEntry[], target: string): VaultEntry | undefined {
      const targetLower = target.toLowerCase()
      const targetAsWords = target.split('/').pop()?.replace(/-/g, ' ').toLowerCase() ?? targetLower
      return entries.find((e) => entryMatchesTarget(e, targetLower, targetAsWords))
    }

    /** Navigate to a wikilink target, logging a warning if not found. */
    function navigateWikilink(entries: VaultEntry[], target: string, selectNote: (e: VaultEntry) => void): void {
      const found = findWikilinkTarget(entries, target)
      if (found) selectNote(found)
      else console.warn(`Navigation target not found: ${target}`)
    }

    /** Persist to disk; on failure, call the revert handler. */
    function persistOptimistic(path: string, content: string, onFail: (p: string) => void): void {
      persistNewNote(path, content).catch(() => onFail(path))
    }

    /** Optimistically add entry to UI, open tab, and persist to disk. */
    function createAndPersist(
      resolved: { entry: VaultEntry; content: string },
      addFn: (e: VaultEntry, c: string) => void,
      openTab: (e: VaultEntry, c: string) => void,
      onFail: (p: string) => void,
    ): void {
      addEntryWithMock(resolved.entry, resolved.content, addFn)
      openTab(resolved.entry, resolved.content)
      persistOptimistic(resolved.entry.path, resolved.content, onFail)
    }

    async function executeFrontmatterOp(op: 'update' | 'delete', path: string, key: string, value?: FrontmatterValue): Promise<string> {
      if (op === 'update') {
        return isTauri() ? invokeFrontmatter('update_frontmatter', { path, key, value }) : applyMockFrontmatterUpdate(path, key, value!)
      }
      return isTauri() ? invokeFrontmatter('delete_frontmatter_property', { path, key }) : applyMockFrontmatterDelete(path, key)
    }

    function renameToastMessage(updatedFiles: number): string {
      if (updatedFiles === 0) return 'Renamed'
      return `Renamed — updated ${updatedFiles} wiki link${updatedFiles > 1 ? 's' : ''}`
    }

    /** Reload content for open tabs whose wikilinks may have changed after a rename. */
    async function reloadTabsAfterRename(
      tabPaths: string[],
      updateTabContent: (path: string, content: string) => void,
    ): Promise<void> {
      for (const tabPath of tabPaths) {
        try {
          updateTabContent(tabPath, await loadNoteContent(tabPath))
        } catch { /* skip tabs that fail to reload */ }
      }
    }

    /** Run a frontmatter update/delete and apply the result to state. */
    async function runFrontmatterAndApply(
      op: 'update' | 'delete', path: string, key: string, value: FrontmatterValue | undefined,
      callbacks: { updateTab: (p: string, c: string) => void; updateEntry: (p: string, patch: Partial<VaultEntry>) => void; toast: (m: string | null) => void },
    ): Promise<void> {
      try {
        callbacks.updateTab(path, await executeFrontmatterOp(op, path, key, value))
        const patch = frontmatterToEntryPatch(op, key, value)
        if (Object.keys(patch).length > 0) callbacks.updateEntry(path, patch)
        callbacks.toast(op === 'update' ? 'Property updated' : 'Property deleted')
      } catch (err) {
        console.error(`Failed to ${op} frontmatter:`, err)
        callbacks.toast(`Failed to ${op} property`)
      }
    }

    export function useNoteActions(config: NoteActionsConfig) {
      const { addEntry, removeEntry, updateContent, entries, setToastMessage, updateEntry } = config
      const tabMgmt = useTabManagement()
      const { setTabs, handleSelectNote, openTabWithContent, handleCloseTab, activeTabPathRef, handleSwitchTab } = tabMgmt
      const tabsRef = useRef(tabMgmt.tabs)
      // eslint-disable-next-line react-hooks/refs
      tabsRef.current = tabMgmt.tabs

      const updateTabContent = useCallback((path: string, newContent: string) => {
        setTabs((prev) => prev.map((t) => t.entry.path === path ? { ...t, content: newContent } : t))
        updateContent(path, newContent)
      }, [setTabs, updateContent])

      const handleNavigateWikilink = useCallback(
        (target: string) => navigateWikilink(entries, target, handleSelectNote),
        [entries, handleSelectNote],
      )

      const revertOptimisticNote = useCallback((path: string) => {
        handleCloseTab(path)
        removeEntry(path)
        setToastMessage('Failed to create note — disk write error')
      }, [handleCloseTab, removeEntry, setToastMessage])

      const pendingNamesRef = useRef<Set<string>>(new Set())

      const handleCreateNote = useCallback((title: string, type: string) => {
        createAndPersist(resolveNewNote(title, type), addEntry, openTabWithContent, revertOptimisticNote)
      }, [openTabWithContent, addEntry, revertOptimisticNote])

      const handleCreateNoteImmediate = useCallback((type?: string) => {
        const noteType = type || 'Note'
        const title = generateUntitledName(entries, noteType, pendingNamesRef.current)
        pendingNamesRef.current.add(title)
        handleCreateNote(title, noteType)
        window.dispatchEvent(new CustomEvent('laputa:focus-editor'))
        setTimeout(() => pendingNamesRef.current.delete(title), 500)
      }, [entries, handleCreateNote])

      const handleCreateType = useCallback((typeName: string) => {
        createAndPersist(resolveNewType(typeName), addEntry, openTabWithContent, revertOptimisticNote)
      }, [openTabWithContent, addEntry, revertOptimisticNote])

      const fmCallbacks = { updateTab: updateTabContent, updateEntry, toast: setToastMessage }

      const runFrontmatterOp = useCallback(
        (op: 'update' | 'delete', path: string, key: string, value?: FrontmatterValue) =>
          runFrontmatterAndApply(op, path, key, value, fmCallbacks),
        [updateTabContent, updateEntry, setToastMessage], // eslint-disable-line react-hooks/exhaustive-deps -- fmCallbacks is stable when deps are
      )

      const handleRenameNote = useCallback(async (
        path: string, newTitle: string, vaultPath: string,
        onEntryRenamed: (oldPath: string, newEntry: Partial<VaultEntry> & { path: string }, newContent: string) => void,
      ) => {
        try {
          const result = await performRename(path, newTitle, vaultPath)
          const newContent = await loadNoteContent(result.new_path)
          const entry = entries.find((e) => e.path === path)
          const newEntry = buildRenamedEntry(entry ?? {} as VaultEntry, newTitle, result.new_path)
          const otherTabPaths = tabsRef.current.filter(t => t.entry.path !== path).map(t => t.entry.path)
          setTabs((prev) => prev.map((t) => t.entry.path === path ? { entry: newEntry, content: newContent } : t))
          if (activeTabPathRef.current === path) handleSwitchTab(result.new_path)
          onEntryRenamed(path, newEntry, newContent)
          await reloadTabsAfterRename(otherTabPaths, updateTabContent)
          setToastMessage(renameToastMessage(result.updated_files))
        } catch (err) {
          console.error('Failed to rename note:', err)
          setToastMessage('Failed to rename note')
        }
      }, [entries, setTabs, activeTabPathRef, handleSwitchTab, updateTabContent, setToastMessage])

      return {
        ...tabMgmt,
        handleNavigateWikilink,
        handleCreateNote,
        handleCreateNoteImmediate,
        handleCreateType,
        handleUpdateFrontmatter: useCallback((path: string, key: string, value: FrontmatterValue) => runFrontmatterOp('update', path, key, value), [runFrontmatterOp]),
        handleDeleteProperty: useCallback((path: string, key: string) => runFrontmatterOp('delete', path, key), [runFrontmatterOp]),
        handleAddProperty: useCallback((path: string, key: string, value: FrontmatterValue) => runFrontmatterOp('update', path, key, value), [runFrontmatterOp]),
        handleRenameNote,
      }
    }