import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
import { Sidebar } from './components/Sidebar'
import { NoteList } from './components/NoteList'
import type { DeletedNoteEntry } from './components/note-list/noteListUtils'
import { Editor } from './components/Editor'
import { ResizeHandle } from './components/ResizeHandle'
import { CreateTypeDialog } from './components/CreateTypeDialog'
import { CreateViewDialog } from './components/CreateViewDialog'
import { QuickOpenPalette } from './components/QuickOpenPalette'
import { CommandPalette } from './components/CommandPalette'
import { SearchPanel } from './components/SearchPanel'
import { Toast } from './components/Toast'
import { CommitDialog } from './components/CommitDialog'
import { PulseView } from './components/PulseView'
import { StatusBar } from './components/StatusBar'
import { SettingsPanel } from './components/SettingsPanel'
import { CloneVaultModal } from './components/CloneVaultModal'
import { WelcomeScreen } from './components/WelcomeScreen'
import { AiAgentsOnboardingPrompt } from './components/AiAgentsOnboardingPrompt'
import { TelemetryConsentDialog } from './components/TelemetryConsentDialog'
import { FeedbackDialog } from './components/FeedbackDialog'
import { useTelemetry } from './hooks/useTelemetry'
import { useMcpStatus } from './hooks/useMcpStatus'
import { useAiAgentsOnboarding } from './hooks/useAiAgentsOnboarding'
import { useAiAgentsStatus } from './hooks/useAiAgentsStatus'
import { useVaultAiGuidanceStatus } from './hooks/useVaultAiGuidanceStatus'
import { useAutoGit } from './hooks/useAutoGit'
import { useVaultLoader } from './hooks/useVaultLoader'
import { useAiAgentPreferences } from './hooks/useAiAgentPreferences'
import { useSettings } from './hooks/useSettings'
import { useNoteActions } from './hooks/useNoteActions'
import { slugify } from './hooks/useNoteCreation'
import { useCommitFlow } from './hooks/useCommitFlow'
import { useGitRemoteStatus } from './hooks/useGitRemoteStatus'
import { useViewMode, type ViewMode } from './hooks/useViewMode'
import { useEntryActions } from './hooks/useEntryActions'
import { useAppCommands } from './hooks/useAppCommands'
import { triggerCommitEntryAction } from './utils/commitEntryAction'
import { generateCommitMessage } from './utils/commitMessage'
import { useDialogs } from './hooks/useDialogs'
import { useVaultSwitcher } from './hooks/useVaultSwitcher'
import { useGitHistory } from './hooks/useGitHistory'
import { useUpdater, restartApp } from './hooks/useUpdater'
import { useAutoSync } from './hooks/useAutoSync'
import { useConflictResolver } from './hooks/useConflictResolver'
import { useZoom } from './hooks/useZoom'
import { useVaultConfig } from './hooks/useVaultConfig'
import { useBuildNumber } from './hooks/useBuildNumber'
import { useOnboarding } from './hooks/useOnboarding'
import { useGettingStartedClone } from './hooks/useGettingStartedClone'
import { useNetworkStatus } from './hooks/useNetworkStatus'
import { useAppNavigation } from './hooks/useAppNavigation'
import {
  applyMainWindowSizeConstraints,
  getMainWindowMinWidth,
  useMainWindowSizeConstraints,
} from './hooks/useMainWindowSizeConstraints'
import { useAiActivity } from './hooks/useAiActivity'
import { useBulkActions } from './hooks/useBulkActions'
import { useDeleteActions } from './hooks/useDeleteActions'
import { useLayoutPanels } from './hooks/useLayoutPanels'
import { useConflictFlow } from './hooks/useConflictFlow'
import { useAppSave } from './hooks/useAppSave'
import { useVaultBridge } from './hooks/useVaultBridge'
import type { CommitDiffRequest } from './hooks/useDiffMode'
import { ConflictResolverModal } from './components/ConflictResolverModal'
import { ConfirmDeleteDialog } from './components/ConfirmDeleteDialog'
import { DeleteProgressNotice } from './components/DeleteProgressNotice'
import { UpdateBanner } from './components/UpdateBanner'
import { invoke } from '@tauri-apps/api/core'
import { isTauri, mockInvoke } from './mock-tauri'
import type { SidebarSelection, InboxPeriod, VaultEntry, ViewDefinition } from './types'
import type { NoteListItem } from './utils/ai-context'
import { initializeNoteProperties } from './utils/initializeNoteProperties'
import { filterEntries, filterInboxEntries, type NoteListFilter } from './utils/noteListHelpers'
import { openNoteInNewWindow } from './utils/openNoteWindow'
import { refreshPulledVaultState } from './utils/pulledVaultRefresh'
import { isNoteWindow, getNoteWindowParams, getNoteWindowPathCandidates, findNoteWindowEntry, type NoteWindowParams } from './utils/windowMode'
import { GitRequiredModal } from './components/GitRequiredModal'
import { RenameDetectedBanner, type DetectedRename } from './components/RenameDetectedBanner'
import { openNoteListPropertiesPicker } from './components/note-list/noteListPropertiesEvents'
import type { NoteListMultiSelectionCommands } from './components/note-list/multiSelectionCommands'
import { focusNoteIconPropertyEditor } from './components/noteIconPropertyEvents'
import { trackEvent } from './lib/telemetry'
import {
  buildVaultAiGuidanceRefreshKey,
} from './lib/vaultAiGuidance'
import { extractDeletedContentFromDiff } from './components/note-list/noteListUtils'
import { hasNoteIconValue } from './utils/noteIcon'
import { filenameStemToTitle } from './utils/noteTitle'
import {
  focusNoteListContainer,
  isEditableElement,
  isEditorEscapeTarget,
  popNeighborhoodHistory,
  pushNeighborhoodHistory,
  shouldProcessNeighborhoodEscape,
} from './utils/neighborhoodHistory'
import { OPEN_AI_CHAT_EVENT } from './utils/aiPromptBridge'
import {
  INBOX_SELECTION,
  isExplicitOrganizationEnabled,
  sanitizeSelectionForOrganization,
} from './utils/organizationWorkflow'
import './App.css'

// Type declarations for mock content storage and test overrides
declare global {
  interface Window {
    __mockContent?: Record<string, string>
    // eslint-disable-next-line @typescript-eslint/no-explicit-any -- mock handler map for Playwright test overrides
    __mockHandlers?: Record<string, (args: any) => any>
  }
}

const DEFAULT_SELECTION: SidebarSelection = INBOX_SELECTION

function shouldPreferOnboardingVaultPath(
  onboardingState: { status: string; vaultPath?: string },
  vaults: Array<{ path: string }>,
): onboardingState is { status: 'ready'; vaultPath: string } {
  return onboardingState.status === 'ready'
    && typeof onboardingState.vaultPath === 'string'
    && onboardingState.vaultPath.length > 0
    && !vaults.some((vault) => vault.path === onboardingState.vaultPath)
}

async function resolveNoteWindowEntry(
  noteWindowParams: NoteWindowParams,
  entries: VaultEntry[],
): Promise<VaultEntry | undefined> {
  const fallbackEntry = () =>
    findNoteWindowEntry(entries, noteWindowParams)

  if (!isTauri()) {
    return fallbackEntry()
  }

  for (const path of getNoteWindowPathCandidates(noteWindowParams)) {
    try {
      return await invoke<VaultEntry>('reload_vault_entry', { path })
    } catch {
      // Try the next normalized candidate before falling back to the scanned entries.
    }
  }

  return fallbackEntry()
}

function createPulseDeletedNoteEntry(fullPath: string, relativePath: string): DeletedNoteEntry {
  const filename = relativePath.split('/').pop() ?? relativePath
  return {
    path: fullPath,
    filename,
    title: filenameStemToTitle(filename),
    isA: 'Note',
    aliases: [],
    belongsTo: [],
    relatedTo: [],
    status: null,
    archived: false,
    modifiedAt: null,
    createdAt: null,
    fileSize: 0,
    snippet: '',
    wordCount: 0,
    relationships: {},
    icon: null,
    color: null,
    order: null,
    sidebarLabel: null,
    template: null,
    sort: null,
    view: null,
    visible: null,
    organized: false,
    favorite: false,
    favoriteIndex: null,
    listPropertiesDisplay: [],
    outgoingLinks: [],
    properties: {},
    hasH1: true,
    fileKind: 'markdown',
    __deletedNotePreview: true,
    __deletedRelativePath: relativePath,
    __changeAddedLines: null,
    __changeDeletedLines: null,
    __changeBinary: false,
  }
}

/** Wraps useEditorSave to also keep outgoingLinks in sync on save and on content change. */
function App() {
  const noteWindowParams = useMemo(() => isNoteWindow() ? getNoteWindowParams() : null, [])
  const [selection, setSelection] = useState<SidebarSelection>(DEFAULT_SELECTION)
  const [noteListFilter, setNoteListFilter] = useState<NoteListFilter>('open')
  const selectionRef = useRef<SidebarSelection>(DEFAULT_SELECTION)
  const neighborhoodHistoryRef = useRef<SidebarSelection[]>([])
  const inboxPeriod: InboxPeriod = 'all'
  const handleSetSelection = useCallback((sel: SidebarSelection, options?: { preserveNeighborhoodHistory?: boolean }) => {
    if (!options?.preserveNeighborhoodHistory && sel.kind !== 'entity') {
      neighborhoodHistoryRef.current = []
    }
    setSelection(sel)
    setNoteListFilter('open')
  }, [])
  const handleEnterNeighborhood = useCallback((entry: VaultEntry) => {
    const nextSelection: SidebarSelection = { kind: 'entity', entry }
    neighborhoodHistoryRef.current = pushNeighborhoodHistory(
      neighborhoodHistoryRef.current,
      selectionRef.current,
      nextSelection,
    )
    handleSetSelection(nextSelection, { preserveNeighborhoodHistory: true })
  }, [handleSetSelection])
  const layout = useLayoutPanels(noteWindowParams ? { initialInspectorCollapsed: true } : undefined)
  const { setInspectorCollapsed } = layout
  const visibleNotesRef = useRef<VaultEntry[]>([])
  const multiSelectionCommandRef = useRef<NoteListMultiSelectionCommands | null>(null)
  const [toastMessage, setToastMessage] = useState<string | null>(null)
  const dialogs = useDialogs()
  const { showAIChat, toggleAIChat } = dialogs
  const [showFeedback, setShowFeedback] = useState(false)
  const openFeedback = useCallback(() => setShowFeedback(true), [])
  const closeFeedback = useCallback(() => setShowFeedback(false), [])
  const networkStatus = useNetworkStatus()

  useEffect(() => {
    const handleOpenAiChat = () => {
      if (!showAIChat) toggleAIChat()
    }

    window.addEventListener(OPEN_AI_CHAT_EVENT, handleOpenAiChat)
    return () => window.removeEventListener(OPEN_AI_CHAT_EVENT, handleOpenAiChat)
  }, [showAIChat, toggleAIChat])

  // onSwitch closure captures `notes` declared below — safe because it's only
  // called on user interaction, never during render (refs inside the hook
  // guarantee the latest closure is always used).
  const vaultSwitcher = useVaultSwitcher({
    onSwitch: () => { handleSetSelection(DEFAULT_SELECTION); notes.closeAllTabs() },
    onToast: (msg) => setToastMessage(msg),
  })
  const { allVaults, defaultPath, handleVaultCloned, selectedVaultPath, switchVault } = vaultSwitcher

  const rememberOnboardingVaultChoice = useCallback((vaultPath: string) => {
    if (!vaultPath) return

    if (allVaults.some((vault) => vault.path === vaultPath)) {
      switchVault(vaultPath)
      return
    }

    const label = vaultPath.split('/').filter(Boolean).pop() || 'Local Vault'
    handleVaultCloned(vaultPath, label)
  }, [allVaults, handleVaultCloned, switchVault])

  const handleGettingStartedVaultReady = useCallback((vaultPath: string) => {
    rememberOnboardingVaultChoice(vaultPath)
    setToastMessage(`Getting Started vault cloned and opened at ${vaultPath}`)
  }, [rememberOnboardingVaultChoice])
  const cloneGettingStartedVault = useGettingStartedClone({
    onError: (message) => setToastMessage(message),
    onSuccess: handleGettingStartedVaultReady,
  })
  const onboarding = useOnboarding(vaultSwitcher.vaultPath, (vaultPath) => {
    handleGettingStartedVaultReady(vaultPath)
  }, vaultSwitcher.loaded)
  const aiAgentsStatus = useAiAgentsStatus()
  const aiAgentsOnboarding = useAiAgentsOnboarding(onboarding.state.status === 'ready' && !noteWindowParams)
  const lastHandledOnboardingUserVaultPathRef = useRef<string | null>(null)

  useEffect(() => {
    const onboardingVaultPath = onboarding.userReadyVaultPath
    if (!onboardingVaultPath || lastHandledOnboardingUserVaultPathRef.current === onboardingVaultPath) return

    lastHandledOnboardingUserVaultPathRef.current = onboardingVaultPath
    if (onboardingVaultPath !== vaultSwitcher.vaultPath) {
      rememberOnboardingVaultChoice(onboardingVaultPath)
    }
  }, [onboarding.userReadyVaultPath, rememberOnboardingVaultChoice, vaultSwitcher.vaultPath])

  // Onboarding can briefly own the vault path for a newly created/opened vault
  // before the persisted switcher catches up, but once the path is already in
  // the switcher list we should trust the explicit switcher state.
  const resolvedPath = noteWindowParams?.vaultPath ?? (
    shouldPreferOnboardingVaultPath(onboarding.state, vaultSwitcher.allVaults)
      ? onboarding.state.vaultPath
      : vaultSwitcher.vaultPath
  )
  // Git repo check: 'checking' | 'required' | 'ready'
  const [gitRepoState, setGitRepoState] = useState<'checking' | 'required' | 'ready'>('checking')
  useEffect(() => {
    if (!resolvedPath) return
    setGitRepoState('checking')
    const check = isTauri()
      ? invoke<boolean>('is_git_repo', { vaultPath: resolvedPath })
      : Promise.resolve(true) // browser mock: assume git
    check
      .then(isGit => setGitRepoState(isGit ? 'ready' : 'required'))
      .catch(() => setGitRepoState('ready')) // fail open
  }, [resolvedPath])

  const handleInitGitRepo = useCallback(async () => {
    if (isTauri()) await invoke('init_git_repo', { vaultPath: resolvedPath })
    setGitRepoState('ready')
  }, [resolvedPath])

  const vault = useVaultLoader(resolvedPath)
  const {
    status: vaultAiGuidanceStatus,
    refresh: refreshVaultAiGuidance,
  } = useVaultAiGuidanceStatus(
    resolvedPath,
    buildVaultAiGuidanceRefreshKey(vault.entries),
  )
  const { config: vaultConfig, updateConfig } = useVaultConfig(resolvedPath)
  const explicitOrganizationEnabled = isExplicitOrganizationEnabled(vaultConfig.inbox?.explicitOrganization)
  const effectiveSelection = sanitizeSelectionForOrganization(selection, vaultConfig.inbox?.explicitOrganization)

  useEffect(() => {
    selectionRef.current = effectiveSelection
  }, [effectiveSelection])

  useEffect(() => {
    if (effectiveSelection !== selection) {
      if (effectiveSelection.kind !== 'entity') {
        neighborhoodHistoryRef.current = []
      }
      setSelection(effectiveSelection)
      setNoteListFilter('open')
    }
  }, [effectiveSelection, selection])

  const handleNeighborhoodHistoryBack = useCallback(() => {
    const { previousSelection, nextHistory } = popNeighborhoodHistory(neighborhoodHistoryRef.current)
    if (!previousSelection) return false

    neighborhoodHistoryRef.current = nextHistory
    handleSetSelection(previousSelection, { preserveNeighborhoodHistory: true })
    requestAnimationFrame(() => {
      focusNoteListContainer(document)
    })
    return true
  }, [handleSetSelection])

  const shouldBlockNeighborhoodEscape = (
    dialogs.showCreateTypeDialog
    || dialogs.showQuickOpen
    || dialogs.showCommandPalette
    || dialogs.showAIChat
    || dialogs.showSettings
    || dialogs.showCloneVault
    || dialogs.showSearch
    || dialogs.showConflictResolver
    || dialogs.showCreateViewDialog
    || showFeedback
  )

  useEffect(() => {
    const handleWindowKeyDown = (event: KeyboardEvent) => {
      if (!shouldProcessNeighborhoodEscape(event, selectionRef.current, shouldBlockNeighborhoodEscape)) return

      const activeElement = document.activeElement
      if (isEditorEscapeTarget(activeElement)) {
        event.preventDefault()
        activeElement.blur()
        requestAnimationFrame(() => {
          focusNoteListContainer(document)
        })
        return
      }

      if (isEditableElement(activeElement)) return

      if (handleNeighborhoodHistoryBack()) {
        event.preventDefault()
      }
    }

    window.addEventListener('keydown', handleWindowKeyDown)
    return () => window.removeEventListener('keydown', handleWindowKeyDown)
  }, [handleNeighborhoodHistoryBack, shouldBlockNeighborhoodEscape])

  const handleSaveExplicitOrganization = useCallback((enabled: boolean) => {
    updateConfig('inbox', {
      noteListProperties: vaultConfig.inbox?.noteListProperties ?? null,
      explicitOrganization: enabled,
    })
  }, [updateConfig, vaultConfig.inbox?.noteListProperties])
  const { settings, loaded: settingsLoaded, saveSettings } = useSettings()
  const aiAgentPreferences = useAiAgentPreferences({
    settings,
    saveSettings,
    aiAgentsStatus,
    onToast: setToastMessage,
  })
  useTelemetry(settings, settingsLoaded)

  const vaultOpenedRef = useRef('')
  useEffect(() => {
    if (vault.entries.length > 0 && gitRepoState !== 'checking' && resolvedPath !== vaultOpenedRef.current) {
      vaultOpenedRef.current = resolvedPath
      trackEvent('vault_opened', { has_git: gitRepoState === 'ready' ? 1 : 0, note_count: vault.entries.length })
    }
  }, [vault.entries.length, gitRepoState, resolvedPath])
  const { mcpStatus, installMcp } = useMcpStatus(resolvedPath, setToastMessage)
  const gitRemoteStatus = useGitRemoteStatus(resolvedPath)

  // Detect external file renames on window focus
  const [detectedRenames, setDetectedRenames] = useState<DetectedRename[]>([])
  useEffect(() => {
    if (!isTauri() || !resolvedPath) return
    const handleFocus = () => {
      invoke<DetectedRename[]>('detect_renames', { vaultPath: resolvedPath })
        .then(renames => { if (renames.length > 0) setDetectedRenames(renames) })
        .catch(() => {}) // ignore errors (e.g., no git)
    }
    window.addEventListener('focus', handleFocus)
    return () => window.removeEventListener('focus', handleFocus)
  }, [resolvedPath])

  const handleUpdateWikilinks = useCallback(async () => {
    if (!isTauri()) return
    try {
      const count = await invoke<number>('update_wikilinks_for_renames', { vaultPath: resolvedPath, renames: detectedRenames })
      setDetectedRenames([])
      vault.reloadVault()
      setToastMessage(`Updated wikilinks in ${count} file${count !== 1 ? 's' : ''}`)
    } catch (err) {
      setToastMessage(`Failed to update wikilinks: ${err}`)
    }
  }, [resolvedPath, detectedRenames, vault, setToastMessage])

  const handleDismissRenames = useCallback(() => setDetectedRenames([]), [])

  const conflictResolver = useConflictResolver({
    vaultPath: resolvedPath,
    onResolved: () => {
      dialogs.closeConflictResolver()
      autoSync.resumePull()
      vault.reloadVault()
      autoSync.triggerSync()
    },
    onToast: (msg) => setToastMessage(msg),
    onOpenFile: (relativePath) => conflictFlow.openConflictFileRef.current(relativePath),
  })
  const flushPendingRawContentRef = useRef<((path: string) => void) | null>(null)
  const flushEditorStateBeforeAction = async (path: string) => {
    flushPendingRawContentRef.current?.(path)
    await appSave.flushBeforeAction(path)
  }

  const notes = useNoteActions({
    addEntry: vault.addEntry,
    removeEntry: vault.removeEntry,
    entries: vault.entries,
    flushBeforeNoteSwitch: flushEditorStateBeforeAction,
    flushBeforeFrontmatterChange: flushEditorStateBeforeAction,
    flushBeforePathRename: flushEditorStateBeforeAction,
    reloadVault: vault.reloadVault,
    setToastMessage,
    updateEntry: vault.updateEntry,
    vaultPath: resolvedPath,
    addPendingSave: vault.addPendingSave,
    removePendingSave: vault.removePendingSave,
    trackUnsaved: vault.trackUnsaved,
    clearUnsaved: vault.clearUnsaved,
    unsavedPaths: vault.unsavedPaths,
    markContentPending: (path, content) => appSave.contentChangeRef.current(path, content),
    onNewNotePersisted: vault.loadModifiedFiles,
    replaceEntry: vault.replaceEntry,
    onFrontmatterPersisted: vault.loadModifiedFiles,
    onPathRenamed: (oldPath, newPath) => appSave.trackRenamedPath(oldPath, newPath),
  })
  const {
    handleSelectNote,
    handleReplaceActiveTab,
    closeAllTabs,
    openTabWithContent,
  } = notes
  const handlePulledVaultUpdate = useCallback(async (updatedFiles: string[]) => {
    await refreshPulledVaultState({
      activeTabPath: notes.activeTabPath,
      closeAllTabs,
      hasUnsavedChanges: (path) => vault.unsavedPaths.has(path),
      reloadFolders: vault.reloadFolders,
      reloadVault: vault.reloadVault,
      reloadViews: vault.reloadViews,
      replaceActiveTab: handleReplaceActiveTab,
      updatedFiles,
      vaultPath: resolvedPath,
    })
  }, [
      closeAllTabs,
      handleReplaceActiveTab,
      notes.activeTabPath,
      resolvedPath,
      vault.reloadFolders,
      vault.reloadVault,
      vault.reloadViews,
      vault.unsavedPaths,
    ])
  const autoSync = useAutoSync({
    vaultPath: resolvedPath,
    intervalMinutes: settings.auto_pull_interval_minutes,
    onVaultUpdated: handlePulledVaultUpdate,
    onConflict: (files) => {
      const names = files.map((f) => f.split('/').pop()).join(', ')
      setToastMessage(`Conflict in ${names} — click to resolve`)
    },
    onToast: (msg) => setToastMessage(msg),
  })
  const pulseCommitDiffRequestIdRef = useRef(0)
  const [pulseCommitDiffRequest, setPulseCommitDiffRequest] = useState<CommitDiffRequest | null>(null)

  // Note window: auto-open the note from URL params once vault entries load
  const noteWindowOpenedRef = useRef(false)
  const noteWindowMissingPathRef = useRef<string | null>(null)
  useEffect(() => {
    if (!noteWindowParams || noteWindowOpenedRef.current) return
    let cancelled = false

    void resolveNoteWindowEntry(noteWindowParams, vault.entries).then((entry) => {
      if (cancelled || noteWindowOpenedRef.current) return
      if (entry) {
        noteWindowOpenedRef.current = true
        noteWindowMissingPathRef.current = null
        void handleSelectNote(entry)
        return
      }
      if (noteWindowMissingPathRef.current === noteWindowParams.notePath) return
      noteWindowMissingPathRef.current = noteWindowParams.notePath
      setToastMessage(`Could not open "${noteWindowParams.noteTitle}" in this window`)
    })

    return () => {
      cancelled = true
    }
  }, [handleSelectNote, noteWindowParams, setToastMessage, vault.entries])

  // Note window: update window title when active note changes
  useEffect(() => {
    if (!noteWindowParams) return
    const activeEntry = notes.tabs.find(t => t.entry.path === notes.activeTabPath)?.entry
    const title = activeEntry?.title ?? noteWindowParams.noteTitle
    if (!isTauri()) { document.title = title; return }
    import('@tauri-apps/api/window').then(({ getCurrentWindow }) => {
      getCurrentWindow().setTitle(title)
    }).catch(() => {})
  }, [noteWindowParams, notes.tabs, notes.activeTabPath])

  // Keep note entry in sync with vault entries so banners (trash/archive)
  // and read-only state react immediately without reopening the note.
  useEffect(() => {
    notes.setTabs(prev => {
      let changed = false
      const next = prev.map(tab => {
        const fresh = vault.entries.find(e => e.path === tab.entry.path)
        if (fresh && fresh !== tab.entry) {
          changed = true
          return { ...tab, entry: fresh }
        }
        return tab
      })
      return changed ? next : prev
    })
  }, [vault.entries]) // eslint-disable-line react-hooks/exhaustive-deps -- notes.setTabs is stable (useState setter)

  const { handleGoBack, handleGoForward, canGoBack, canGoForward, entriesByPath } = useAppNavigation({
    entries: vault.entries,
    activeTabPath: notes.activeTabPath,
    onSelectNote: notes.handleSelectNote,
  })

  const queuePulseCommitDiff = useCallback((path: string, commitHash: string) => {
    pulseCommitDiffRequestIdRef.current += 1
    setPulseCommitDiffRequest({
      requestId: pulseCommitDiffRequestIdRef.current,
      path,
      commitHash,
    })
  }, [])

  const handlePulseCommitDiffHandled = useCallback((requestId: number) => {
    setPulseCommitDiffRequest((current) =>
      current?.requestId === requestId ? null : current,
    )
  }, [])

  const handlePulseOpenNote = useCallback((relativePath: string, commitHash?: string) => {
    const fullPath = `${resolvedPath}/${relativePath}`
    const entry = entriesByPath.get(fullPath) ?? entriesByPath.get(relativePath)

    if (commitHash) {
      const targetPath = entry?.path ?? fullPath
      queuePulseCommitDiff(targetPath, commitHash)
      if (entry) {
        void handleSelectNote(entry)
      } else {
        openTabWithContent(createPulseDeletedNoteEntry(fullPath, relativePath), 'Content not available')
      }
      return
    }

    if (entry) {
      void handleSelectNote(entry)
    }
  }, [entriesByPath, resolvedPath, queuePulseCommitDiff, handleSelectNote, openTabWithContent])

  const handleOpenFavorite = useCallback(async (entry: VaultEntry) => {
    await handleReplaceActiveTab(entry)
    handleEnterNeighborhood(entry)
  }, [handleEnterNeighborhood, handleReplaceActiveTab])

  const vaultBridge = useVaultBridge({
    entriesByPath,
    resolvedPath,
    reloadVault: vault.reloadVault,
    reloadFolders: vault.reloadFolders,
    reloadViews: vault.reloadViews,
    closeAllTabs,
    replaceActiveTab: handleReplaceActiveTab,
    hasUnsavedChanges: (path) => vault.unsavedPaths.has(path),
    onSelectNote: notes.handleSelectNote,
    activeTabPath: notes.activeTabPath,
  })

  const conflictFlow = useConflictFlow({
    resolvedPath, entries: vault.entries,
    conflictFiles: autoSync.conflictFiles,
    pausePull: autoSync.pausePull, resumePull: autoSync.resumePull,
    triggerSync: autoSync.triggerSync, reloadVault: vault.reloadVault,
    initConflictFiles: conflictResolver.initFiles,
    openConflictResolver: dialogs.openConflictResolver,
    closeConflictResolver: dialogs.closeConflictResolver,
    onSelectNote: notes.handleSelectNote,
    activeTabPath: notes.activeTabPath,
    setToastMessage,
  })

  const appSave = useAppSave({
    updateEntry: vault.updateEntry, setTabs: notes.setTabs, handleSwitchTab: notes.handleSwitchTab, setToastMessage,
    loadModifiedFiles: vault.loadModifiedFiles, reloadViews: async () => { await vault.reloadViews() },
    clearUnsaved: vault.clearUnsaved, unsavedPaths: vault.unsavedPaths,
    tabs: notes.tabs, activeTabPath: notes.activeTabPath,
    handleRenameNote: notes.handleRenameNote, handleRenameFilename: notes.handleRenameFilename,
    replaceEntry: vault.replaceEntry, resolvedPath,
    initialH1AutoRenameEnabled: settings.initial_h1_auto_rename_enabled !== false,
  })

  const aiActivity = useAiActivity({
    onOpenNote: vaultBridge.openNoteByPath,
    onOpenTab: vaultBridge.openNoteByPath,
    onSetFilter: (filterType) => {
      handleSetSelection({ kind: 'sectionGroup', type: filterType })
    },
    onVaultChanged: () => { vault.reloadVault() },
  })

  const handleInitializeProperties = useCallback(async (path: string) => {
    await initializeNoteProperties(notes.handleUpdateFrontmatter, path)
  }, [notes])

  const handleRemoveNoteIcon = useCallback(async (path: string) => {
    await notes.handleDeleteProperty(path, 'icon')
  }, [notes])

  const handleSetNoteIconCommand = useCallback(() => {
    setInspectorCollapsed(false)
    window.requestAnimationFrame(() => {
      window.requestAnimationFrame(() => {
        focusNoteIconPropertyEditor()
      })
    })
  }, [setInspectorCollapsed])

  const handleCustomizeNoteListColumns = useCallback(() => {
    if (effectiveSelection.kind === 'view') {
      openNoteListPropertiesPicker('view')
      return
    }

    if (effectiveSelection.kind !== 'filter') return
    if (effectiveSelection.filter === 'all') {
      openNoteListPropertiesPicker('all')
      return
    }
    if (effectiveSelection.filter === 'inbox') {
      openNoteListPropertiesPicker('inbox')
    }
  }, [effectiveSelection])

  const handleUpdateAllNotesNoteListProperties = useCallback((value: string[] | null) => {
    updateConfig('allNotes', {
      ...(vaultConfig.allNotes ?? { noteListProperties: null }),
      noteListProperties: value && value.length > 0 ? value : null,
    })
  }, [updateConfig, vaultConfig.allNotes])

  const handleUpdateInboxNoteListProperties = useCallback((value: string[] | null) => {
    updateConfig('inbox', {
      ...(vaultConfig.inbox ?? { noteListProperties: null }),
      noteListProperties: value && value.length > 0 ? value : null,
    })
  }, [updateConfig, vaultConfig.inbox])

  const handleCreateFolder = useCallback(async (name: string) => {
    try {
      if (isTauri()) {
        await invoke('create_vault_folder', { vaultPath: resolvedPath, folderName: name })
      } else {
        await mockInvoke('create_vault_folder', { vaultPath: resolvedPath, folderName: name })
      }
      await vault.reloadFolders()
      setToastMessage(`Created folder "${name}"`)
    } catch (e) {
      setToastMessage(`Failed to create folder: ${e}`)
    }
  }, [resolvedPath, vault, setToastMessage])

  const handleRemoveNoteIconCommand = useCallback(() => {
    if (notes.activeTabPath) handleRemoveNoteIcon(notes.activeTabPath)
  }, [notes.activeTabPath, handleRemoveNoteIcon])

  const handleOpenInNewWindow = useCallback(() => {
    const activeTab = notes.tabs.find(t => t.entry.path === notes.activeTabPath)
    if (activeTab) openNoteInNewWindow(activeTab.entry.path, resolvedPath, activeTab.entry.title)
  }, [notes.tabs, notes.activeTabPath, resolvedPath])

  const handleOpenEntryInNewWindow = useCallback((entry: { path: string; title: string }) => {
    openNoteInNewWindow(entry.path, resolvedPath, entry.title)
  }, [resolvedPath])

  const handleDiscardFile = useCallback(async (relativePath: string) => {
    const targetFile = vault.modifiedFiles.find((file) => file.relativePath === relativePath)
    const activePathBefore = notes.activeTabPath
    try {
      if (isTauri()) {
        await invoke('git_discard_file', { vaultPath: resolvedPath, relativePath })
      } else {
        await mockInvoke('git_discard_file', { vaultPath: resolvedPath, relativePath })
      }
      const reloadedEntries = await vault.reloadVault()
      const affectedActiveTab = !!activePathBefore
        && (activePathBefore === targetFile?.path || activePathBefore.endsWith('/' + relativePath))
      if (!affectedActiveTab) return
      const refreshedEntry = reloadedEntries.find((entry) =>
        entry.path === targetFile?.path || entry.path.endsWith('/' + relativePath),
      )
      if (refreshedEntry) {
        await notes.handleReplaceActiveTab(refreshedEntry)
      } else {
        notes.closeAllTabs()
      }
    } catch (err) {
      setToastMessage(typeof err === 'string' ? err : 'Failed to discard changes')
    }
  }, [resolvedPath, vault, notes, setToastMessage])

  const handleOpenDeletedNote = useCallback(async (entry: DeletedNoteEntry) => {
    let previewContent = 'Content not available (untracked)'
    let hasDiff = false
    try {
      const diff = await vault.loadDiff(entry.path)
      hasDiff = diff.length > 0
      previewContent = extractDeletedContentFromDiff(diff) ?? previewContent
    } catch (err) {
      console.warn('Failed to load deleted note preview:', err)
    }
    notes.openTabWithContent(entry, previewContent)
    if (hasDiff) {
      setTimeout(() => diffToggleRef.current(), 50)
    } else {
      setToastMessage('Content not available (untracked)')
    }
  }, [vault, notes, setToastMessage])

  const commitFlow = useCommitFlow({
    savePending: appSave.savePending,
    loadModifiedFiles: vault.loadModifiedFiles,
    resolveRemoteStatus: gitRemoteStatus.refreshRemoteStatus,
    setToastMessage,
    onPushRejected: autoSync.handlePushRejected,
    vaultPath: resolvedPath,
  })
  const suggestedCommitMessage = useMemo(() => generateCommitMessage(vault.modifiedFiles), [vault.modifiedFiles])
  const isGitVault = !vault.modifiedFilesError
  const modifiedFilesSignature = useMemo(
    () => vault.modifiedFiles.map((file) => `${file.relativePath}:${file.status}`).sort().join('|'),
    [vault.modifiedFiles],
  )
  const autoGit = useAutoGit({
    enabled: settings.autogit_enabled === true,
    idleThresholdSeconds: settings.autogit_idle_threshold_seconds ?? 90,
    inactiveThresholdSeconds: settings.autogit_inactive_threshold_seconds ?? 30,
    isGitVault,
    hasPendingChanges: vault.modifiedFiles.length > 0
      || ((autoSync.remoteStatus?.hasRemote ?? false) && (autoSync.remoteStatus?.ahead ?? 0) > 0),
    hasUnsavedChanges: vault.unsavedPaths.size > 0,
    onCheckpoint: () => commitFlow.runAutomaticCheckpoint(),
  })
  const recordAutoGitActivity = autoGit.recordActivity
  const openCommitDialog = commitFlow.openCommitDialog
  const runAutomaticCheckpoint = commitFlow.runAutomaticCheckpoint
  const handleAppContentChange = appSave.handleContentChange
  const handleAppSave = appSave.handleSave
  const loadModifiedFiles = vault.loadModifiedFiles

  useEffect(() => {
    if (modifiedFilesSignature.length === 0) return
    recordAutoGitActivity()
  }, [modifiedFilesSignature, recordAutoGitActivity])

  const handleCommitPush = useCallback(() => {
    triggerCommitEntryAction({
      autoGitEnabled: settings.autogit_enabled === true,
      openCommitDialog,
      runAutomaticCheckpoint,
    })
  }, [openCommitDialog, runAutomaticCheckpoint, settings.autogit_enabled])

  const handleTrackedContentChange = useCallback((path: string, content: string) => {
    recordAutoGitActivity()
    handleAppContentChange(path, content)
  }, [handleAppContentChange, recordAutoGitActivity])

  const handleTrackedSave = useCallback(async (...args: Parameters<typeof handleAppSave>) => {
    const result = await handleAppSave(...args)
    recordAutoGitActivity()
    return result
  }, [handleAppSave, recordAutoGitActivity])

  const seedAutoGitSavedChange = useCallback(async () => {
    if (isTauri()) {
      throw new Error('seedAutoGitSavedChange is only available in browser smoke tests')
    }

    const activePath = notes.activeTabPath
    const activeTab = activePath
      ? notes.tabs.find((tab) => tab.entry.path === activePath)
      : null

    if (!activePath || !activeTab) {
      throw new Error('No active note is available for the AutoGit test bridge')
    }

    const saveNoteContent = window.__mockHandlers?.save_note_content
    if (typeof saveNoteContent === 'function') {
      await Promise.resolve(saveNoteContent({ path: activePath, content: activeTab.content }))
    } else {
      await mockInvoke('save_note_content', { path: activePath, content: activeTab.content })
    }

    await loadModifiedFiles()
    recordAutoGitActivity()
  }, [loadModifiedFiles, notes.activeTabPath, notes.tabs, recordAutoGitActivity])

  useEffect(() => {
    window.__laputaTest = {
      ...window.__laputaTest,
      seedAutoGitSavedChange,
    }

    return () => {
      if (window.__laputaTest?.seedAutoGitSavedChange === seedAutoGitSavedChange) {
        delete window.__laputaTest.seedAutoGitSavedChange
      }
    }
  }, [seedAutoGitSavedChange])

  const entryActions = useEntryActions({
    entries: vault.entries, updateEntry: vault.updateEntry,
    handleUpdateFrontmatter: notes.handleUpdateFrontmatter,
    handleDeleteProperty: notes.handleDeleteProperty, setToastMessage,
    createTypeEntry: notes.createTypeEntrySilent,
    onBeforeAction: appSave.flushBeforeAction,
  })

  const deleteActions = useDeleteActions({
    onDeselectNote: (path: string) => { if (notes.activeTabPath === path) notes.closeAllTabs() },
    removeEntry: vault.removeEntry,
    removeEntries: vault.removeEntries,
    refreshModifiedFiles: vault.loadModifiedFiles,
    reloadVault: vault.reloadVault,
    setToastMessage,
  })

  const shouldLoadGitHistory = !layout.inspectorCollapsed && !showAIChat
  const gitHistory = useGitHistory(notes.activeTabPath, vault.loadGitHistory, shouldLoadGitHistory)

  const handleCreateType = useCallback((name: string) => {
    notes.handleCreateType(name)
    setToastMessage(`Type "${name}" created`)
  }, [notes, setToastMessage])

  const handleCreateMissingType = useCallback(async (path: string, missingType: string, nextTypeName: string) => {
    const trimmed = nextTypeName.trim()
    if (!trimmed) return

    const targetFilename = `${slugify(trimmed)}.md`
    const exactType = vault.entries.find((entry) => entry.isA === 'Type' && entry.title === trimmed)
    const slugMatch = vault.entries.find((entry) => entry.isA === 'Type' && slugify(entry.title) === slugify(trimmed))
    const filenameCollision = vault.entries.find((entry) => entry.filename.toLowerCase() === targetFilename)
    const resolvedTypeName = exactType?.title ?? slugMatch?.title ?? trimmed

    if (filenameCollision && filenameCollision.isA !== 'Type') {
      setToastMessage(`Cannot create type "${trimmed}" because ${targetFilename} already exists`)
      throw new Error(`Type filename collision for ${targetFilename}`)
    }

    if (!exactType && !slugMatch) {
      await notes.createTypeEntrySilent(trimmed)
    }

    await notes.handleUpdateFrontmatter(path, 'type', resolvedTypeName)
    setToastMessage(
      resolvedTypeName === missingType
        ? `Type "${resolvedTypeName}" created`
        : `Type set to "${resolvedTypeName}"`,
    )
  }, [notes, setToastMessage, vault.entries])

  const handleCreateOrUpdateView = useCallback(async (definition: ViewDefinition) => {
    const editing = dialogs.editingView
    const filename = editing
      ? editing.filename
      : definition.name.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '') + '.yml'
    const nextDefinition = editing ? { ...editing.definition, ...definition } : definition
    const target = isTauri() ? invoke : mockInvoke
    await target('save_view_cmd', { vaultPath: resolvedPath, filename, definition: nextDefinition })
    trackEvent(editing ? 'view_updated' : 'view_created')
    await vault.reloadViews()
    await vault.reloadVault()
    vault.reloadFolders()
    setToastMessage(editing ? `View "${nextDefinition.name}" updated` : `View "${nextDefinition.name}" created`)
    handleSetSelection({ kind: 'view', filename })
  }, [resolvedPath, vault, handleSetSelection, dialogs.editingView])

  const handleUpdateViewDefinition = useCallback(async (filename: string, patch: Partial<ViewDefinition>) => {
    const existing = vault.views.find((view) => view.filename === filename)
    if (!existing) return

    const target = isTauri() ? invoke : mockInvoke
    await target('save_view_cmd', {
      vaultPath: resolvedPath,
      filename,
      definition: { ...existing.definition, ...patch },
    })
    await vault.reloadViews()
  }, [resolvedPath, vault])

  const handleEditView = useCallback((filename: string) => {
    const view = vault.views.find((v) => v.filename === filename)
    if (view) dialogs.openEditView(filename, view.definition)
  }, [vault.views, dialogs])

  const handleDeleteView = useCallback(async (filename: string) => {
    const target = isTauri() ? invoke : mockInvoke
    await target('delete_view_cmd', { vaultPath: resolvedPath, filename })
    await vault.reloadViews()
    await vault.reloadVault()
    vault.reloadFolders()
    if (selection.kind === 'view' && selection.filename === filename) {
      handleSetSelection({ kind: 'filter', filter: 'all' })
    }
    setToastMessage('View deleted')
  }, [resolvedPath, vault, selection, handleSetSelection])

  const availableFields = useMemo(() => {
    const builtIn = ['type', 'status', 'title', 'favorite', 'body']
    if (!vault.entries?.length) return builtIn
    const customFields = new Set<string>()
    for (const e of vault.entries) {
      if (e.properties) {
        for (const key of Object.keys(e.properties)) customFields.add(key)
      }
      if (e.relationships) {
        for (const key of Object.keys(e.relationships)) customFields.add(key)
      }
    }
    return [...builtIn, ...Array.from(customFields).sort()]
  }, [vault.entries])

  const bulkActions = useBulkActions(entryActions, vault.entries, setToastMessage)

  // Raw-toggle ref: Editor registers its handleToggleRaw here so the command palette can call it
  const rawToggleRef = useRef<() => void>(() => {})
  // Diff-toggle ref: Editor registers its handleToggleDiff here so the command palette can call it
  const diffToggleRef = useRef<() => void>(() => {})

  const { setViewMode, sidebarVisible, noteListVisible } = useViewMode(noteWindowParams ? 'editor-only' : undefined)
  const zoom = useZoom()
  const buildNumber = useBuildNumber()

  const updateMainWindowConstraints = useCallback((
    nextSidebarVisible: boolean,
    nextNoteListVisible: boolean,
    nextInspectorCollapsed: boolean = layout.inspectorCollapsed,
  ) => {
    if (noteWindowParams) return

    const minWidth = getMainWindowMinWidth({
      sidebarVisible: nextSidebarVisible,
      noteListVisible: nextNoteListVisible,
      inspectorCollapsed: nextInspectorCollapsed,
    })

    void applyMainWindowSizeConstraints(minWidth).catch(() => {})
  }, [layout.inspectorCollapsed, noteWindowParams])

  const handleSetViewMode = useCallback((mode: ViewMode) => {
    setViewMode(mode)
    updateMainWindowConstraints(mode === 'all', mode !== 'editor-only')
  }, [setViewMode, updateMainWindowConstraints])

  const handleToggleInspector = useCallback(() => {
    const nextInspectorCollapsed = !layout.inspectorCollapsed
    layout.setInspectorCollapsed(nextInspectorCollapsed)
    updateMainWindowConstraints(sidebarVisible, noteListVisible, nextInspectorCollapsed)
  }, [
    layout,
    noteListVisible,
    sidebarVisible,
    updateMainWindowConstraints,
  ])

  useMainWindowSizeConstraints({
    enabled: !noteWindowParams,
    sidebarVisible,
    noteListVisible,
    inspectorCollapsed: layout.inspectorCollapsed,
  })

  const { status: updateStatus, actions: updateActions } = useUpdater(settings.release_channel)

  const handleCheckForUpdates = useCallback(async () => {
    if (updateStatus.state === 'downloading') {
      setToastMessage('Update is downloading…')
      return
    }
    if (updateStatus.state === 'ready') {
      await restartApp()
      return
    }
    const result = await updateActions.checkForUpdates()
    if (result === 'up-to-date') {
      setToastMessage("You're on the latest version")
    } else if (result === 'error') {
      setToastMessage('Could not check for updates')
    }
  }, [updateActions, updateStatus.state, setToastMessage])

  const handleRepairVault = useCallback(async () => {
    if (!resolvedPath) return
    try {
      const tauriInvoke = isTauri() ? invoke : mockInvoke
      const msg = await tauriInvoke<string>('repair_vault', { vaultPath: resolvedPath })
      await vault.reloadVault()
      await refreshVaultAiGuidance()
      setToastMessage(msg)
    } catch (err) {
      setToastMessage(`Failed to repair vault: ${err}`)
    }
  }, [refreshVaultAiGuidance, resolvedPath, vault, setToastMessage])

  const restoreVaultAiGuidance = useCallback(async (successToast: string | null = 'Tolaria AI guidance restored') => {
    if (!resolvedPath) return
    try {
      const tauriInvoke = isTauri() ? invoke : mockInvoke
      await tauriInvoke('restore_vault_ai_guidance', { vaultPath: resolvedPath })
      await vault.reloadVault()
      await refreshVaultAiGuidance()
      if (successToast) setToastMessage(successToast)
    } catch (err) {
      setToastMessage(`Failed to restore Tolaria AI guidance: ${err}`)
    }
  }, [refreshVaultAiGuidance, resolvedPath, vault, setToastMessage])

  const activeDeletedFile = useMemo(() => {
    const activeTabPath = notes.activeTabPath
    if (!activeTabPath) return null
    return vault.modifiedFiles.find((file) =>
      file.status === 'deleted'
      && (file.path === activeTabPath || activeTabPath.endsWith('/' + file.relativePath)),
    ) ?? null
  }, [notes.activeTabPath, vault.modifiedFiles])

  const activeCommandEntry = useMemo(() => {
    if (!notes.activeTabPath) return null
    return notes.tabs.find((tab) => tab.entry.path === notes.activeTabPath)?.entry
      ?? vault.entries.find((entry) => entry.path === notes.activeTabPath)
      ?? null
  }, [notes.activeTabPath, notes.tabs, vault.entries])

  const canToggleRichEditor = !!activeCommandEntry
    && activeCommandEntry.filename.toLowerCase().endsWith('.md')
    && !activeDeletedFile

  const noteListColumnsLabel = useMemo(() => {
    if (effectiveSelection.kind === 'view') {
      const selectedView = vault.views.find((view) => view.filename === effectiveSelection.filename)
      return selectedView ? `Customize ${selectedView.definition.name} columns` : 'Customize View columns'
    }

    return effectiveSelection.kind === 'filter' && effectiveSelection.filter === 'all'
      ? 'Customize All Notes columns'
      : 'Customize Inbox columns'
  }, [effectiveSelection, vault.views])

  const commands = useAppCommands({
    activeTabPath: notes.activeTabPath, activeTabPathRef: notes.activeTabPathRef,
    entries: vault.entries,
    visibleNotesRef,
    multiSelectionCommandRef,
    modifiedCount: vault.modifiedFiles.length,
    activeNoteModified: vault.modifiedFiles.some(f => f.path === notes.activeTabPath),
    selection: effectiveSelection,
    onQuickOpen: dialogs.openQuickOpen, onCommandPalette: dialogs.openCommandPalette,
    onSearch: dialogs.openSearch,
    onCreateNote: notes.handleCreateNoteImmediate,
    onCreateNoteOfType: notes.handleCreateNoteImmediate,
    onSave: appSave.handleSave,
    onOpenSettings: dialogs.openSettings,
    onOpenFeedback: openFeedback,
    onDeleteNote: deleteActions.handleDeleteNote,
    onArchiveNote: entryActions.handleArchiveNote, onUnarchiveNote: entryActions.handleUnarchiveNote,
    onCommitPush: handleCommitPush,
    onPull: autoSync.triggerSync,
    onResolveConflicts: conflictFlow.handleOpenConflictResolver,
    onSetViewMode: handleSetViewMode,
    onToggleInspector: handleToggleInspector,
    onToggleDiff: () => diffToggleRef.current(),
    onToggleRawEditor: canToggleRichEditor ? () => rawToggleRef.current() : undefined,
    onZoomIn: zoom.zoomIn, onZoomOut: zoom.zoomOut, onZoomReset: zoom.zoomReset,
    zoomLevel: zoom.zoomLevel,
    onSelect: handleSetSelection,
    showInbox: explicitOrganizationEnabled,
    onReplaceActiveTab: notes.handleReplaceActiveTab,
    onSelectNote: notes.handleSelectNote,
    onGoBack: handleGoBack, onGoForward: handleGoForward,
    canGoBack: canGoBack, canGoForward: canGoForward,
    onOpenVault: vaultSwitcher.handleOpenLocalFolder,
    onCreateEmptyVault: vaultSwitcher.handleCreateEmptyVault,
    onCreateType: dialogs.openCreateType,
    onToggleAIChat: dialogs.toggleAIChat,
    onCheckForUpdates: handleCheckForUpdates,
    onRemoveActiveVault: () => vaultSwitcher.removeVault(vaultSwitcher.vaultPath),
    onRestoreGettingStarted: cloneGettingStartedVault,
    isGettingStartedHidden: vaultSwitcher.isGettingStartedHidden,
    vaultCount: vaultSwitcher.allVaults.length,
    mcpStatus,
    onInstallMcp: installMcp,
    onOpenAiAgents: dialogs.openSettings,
    aiAgentsStatus,
    vaultAiGuidanceStatus,
    onRestoreVaultAiGuidance: () => { void restoreVaultAiGuidance() },
    selectedAiAgent: aiAgentPreferences.defaultAiAgent,
    onSetDefaultAiAgent: aiAgentPreferences.setDefaultAiAgent,
    onCycleDefaultAiAgent: aiAgentPreferences.cycleDefaultAiAgent,
    selectedAiAgentLabel: aiAgentPreferences.defaultAiAgentLabel,
    onReloadVault: vault.reloadVault,
    onRepairVault: handleRepairVault,
    onSetNoteIcon: handleSetNoteIconCommand,
    onRemoveNoteIcon: handleRemoveNoteIconCommand,
    activeNoteHasIcon: (() => {
      const ae = vault.entries.find(e => e.path === notes.activeTabPath)
      return hasNoteIconValue(ae?.icon)
    })(),
    noteListFilter,
    onSetNoteListFilter: setNoteListFilter,
    onOpenInNewWindow: handleOpenInNewWindow,
    onToggleFavorite: entryActions.handleToggleFavorite,
    onToggleOrganized: explicitOrganizationEnabled ? entryActions.handleToggleOrganized : undefined,
    onCustomizeNoteListColumns: handleCustomizeNoteListColumns,
    canCustomizeNoteListColumns: effectiveSelection.kind === 'view'
      || (
        effectiveSelection.kind === 'filter'
        && (effectiveSelection.filter === 'all' || (explicitOrganizationEnabled && effectiveSelection.filter === 'inbox'))
      ),
    noteListColumnsLabel,
    onRestoreDeletedNote: activeDeletedFile ? () => { void handleDiscardFile(activeDeletedFile.relativePath) } : undefined,
    canRestoreDeletedNote: !!activeDeletedFile,
  })

  const activeTab = notes.tabs.find((t) => t.entry.path === notes.activeTabPath) ?? null

  const inboxCount = useMemo(() => filterInboxEntries(vault.entries, inboxPeriod).length, [vault.entries, inboxPeriod])

  const aiNoteList = useMemo<NoteListItem[]>(() => {
    const isInbox = effectiveSelection.kind === 'filter' && effectiveSelection.filter === 'inbox'
    const filtered = isInbox ? filterInboxEntries(vault.entries, inboxPeriod) : filterEntries(vault.entries, effectiveSelection, undefined, vault.views)
    return filtered.map(e => ({
      path: e.path, title: e.title, type: e.isA ?? 'Note',
    }))
  }, [vault.entries, vault.views, effectiveSelection, inboxPeriod])

  const aiNoteListFilter = useMemo(() => {
    if (effectiveSelection.kind === 'sectionGroup') return { type: effectiveSelection.type, query: '' }
    if (effectiveSelection.kind === 'entity') return { type: null, query: effectiveSelection.entry.title }
    return { type: null, query: '' }
  }, [effectiveSelection])

  const shouldResumeFreshStartOnboarding = useMemo(() => {
    if (onboarding.state.status !== 'ready' || !vaultSwitcher.loaded) return false
    const remembersOnlyDefaultVault = selectedVaultPath === null || selectedVaultPath === defaultPath

    return remembersOnlyDefaultVault
      && vaultSwitcher.allVaults.length === 1
      && vaultSwitcher.allVaults[0]?.path === vaultSwitcher.vaultPath
      && onboarding.state.vaultPath === vaultSwitcher.vaultPath
  }, [defaultPath, onboarding.state, selectedVaultPath, vaultSwitcher.allVaults, vaultSwitcher.loaded, vaultSwitcher.vaultPath])

  // Show loading spinner while checking vault (skip for note windows)
  if (!noteWindowParams && onboarding.state.status === 'loading') {
    return <LoadingView />
  }

  // Show telemetry consent dialog on first launch (skip for note windows).
  // After the user answers, the next render can continue into onboarding.
  if (!noteWindowParams && settingsLoaded && settings.telemetry_consent === null) {
    return (
      <TelemetryConsentDialog
        onAccept={() => {
          const id = crypto.randomUUID()
          saveSettings({ ...settings, telemetry_consent: true, crash_reporting_enabled: true, analytics_enabled: true, anonymous_id: id })
        }}
        onDecline={() => {
          saveSettings({ ...settings, telemetry_consent: false, crash_reporting_enabled: false, analytics_enabled: false, anonymous_id: null })
        }}
      />
    )
  }

  // Show welcome/onboarding screen when vault doesn't exist (skip for note windows — vault path is known)
  if (!noteWindowParams && (onboarding.state.status === 'welcome' || onboarding.state.status === 'vault-missing' || shouldResumeFreshStartOnboarding)) {
    const welcomeOnboarding = shouldResumeFreshStartOnboarding
      ? { ...onboarding, state: { status: 'welcome' as const, defaultPath: vaultSwitcher.vaultPath } }
      : onboarding
    return <WelcomeView onboarding={welcomeOnboarding} isOffline={networkStatus.isOffline} />
  }

  if (!noteWindowParams && onboarding.state.status === 'ready' && aiAgentsOnboarding.showPrompt) {
    return (
      <>
        <AiAgentsOnboardingView
          statuses={aiAgentsStatus}
          onContinue={aiAgentsOnboarding.dismissPrompt}
        />
        <Toast message={toastMessage} onDismiss={() => setToastMessage(null)} />
      </>
    )
  }

  // Show git-required modal when vault has no git repo (skip for note windows)
  if (!noteWindowParams && gitRepoState === 'required') {
    return (
      <div className="app-shell">
        <GitRequiredModal
          onCreateRepo={handleInitGitRepo}
          onChooseVault={vaultSwitcher.handleOpenLocalFolder}
        />
      </div>
    )
  }

  // Show loading spinner while checking git status
  if (!noteWindowParams && gitRepoState === 'checking' && onboarding.state.status === 'ready') {
    return <LoadingView />
  }

  return (
    <div className="app-shell">
      <div className="app">
        {sidebarVisible && (
          <>
            <div className="app__sidebar" style={{ width: layout.sidebarWidth }}>
              <Sidebar entries={vault.entries} folders={vault.folders} views={vault.views} selection={effectiveSelection} onSelect={handleSetSelection} onSelectNote={notes.handleSelectNote} onSelectFavorite={handleOpenFavorite} onReorderFavorites={entryActions.handleReorderFavorites} onCreateType={notes.handleCreateNoteImmediate} onCreateNewType={dialogs.openCreateType} onCustomizeType={entryActions.handleCustomizeType} onUpdateTypeTemplate={entryActions.handleUpdateTypeTemplate} onReorderSections={entryActions.handleReorderSections} onRenameSection={entryActions.handleRenameSection} onToggleTypeVisibility={entryActions.handleToggleTypeVisibility} onCreateFolder={handleCreateFolder} onCreateView={dialogs.openCreateView} onEditView={handleEditView} onDeleteView={handleDeleteView} showInbox={explicitOrganizationEnabled} inboxCount={inboxCount} />
            </div>
            <ResizeHandle onResize={layout.handleSidebarResize} />
          </>
        )}
        {noteListVisible && (
          <>
            <div className={`app__note-list${aiActivity.highlightElement === 'notelist' ? ' ai-highlight' : ''}`} style={{ width: layout.noteListWidth }}>
              {effectiveSelection.kind === 'filter' && effectiveSelection.filter === 'pulse' ? (
                <PulseView vaultPath={resolvedPath} onOpenNote={handlePulseOpenNote} sidebarCollapsed={!sidebarVisible} onExpandSidebar={() => handleSetViewMode('all')} />
              ) : (
                <NoteList entries={vault.entries} selection={effectiveSelection} selectedNote={activeTab?.entry ?? null} noteListFilter={noteListFilter} onNoteListFilterChange={setNoteListFilter} inboxPeriod={inboxPeriod} modifiedFiles={vault.modifiedFiles} modifiedFilesError={vault.modifiedFilesError} getNoteStatus={vault.getNoteStatus} sidebarCollapsed={!sidebarVisible} onSelectNote={notes.handleSelectNote} onReplaceActiveTab={notes.handleReplaceActiveTab} onEnterNeighborhood={handleEnterNeighborhood} onCreateNote={notes.handleCreateNoteImmediate} onBulkOrganize={explicitOrganizationEnabled ? bulkActions.handleBulkOrganize : undefined} onBulkArchive={bulkActions.handleBulkArchive} onBulkDeletePermanently={deleteActions.handleBulkDeletePermanently} onUpdateTypeSort={notes.handleUpdateFrontmatter} onUpdateViewDefinition={handleUpdateViewDefinition} updateEntry={vault.updateEntry} onOpenInNewWindow={handleOpenEntryInNewWindow} onDiscardFile={handleDiscardFile} onAutoTriggerDiff={() => diffToggleRef.current()} onOpenDeletedNote={handleOpenDeletedNote} allNotesNoteListProperties={vaultConfig.allNotes?.noteListProperties ?? null} onUpdateAllNotesNoteListProperties={handleUpdateAllNotesNoteListProperties} inboxNoteListProperties={vaultConfig.inbox?.noteListProperties ?? null} onUpdateInboxNoteListProperties={handleUpdateInboxNoteListProperties} views={vault.views} visibleNotesRef={visibleNotesRef} multiSelectionCommandRef={multiSelectionCommandRef} />
              )}
            </div>
            <ResizeHandle onResize={layout.handleNoteListResize} />
          </>
        )}
        <div className={`app__editor${aiActivity.highlightElement === 'editor' || aiActivity.highlightElement === 'tab' ? ' ai-highlight' : ''}`}>
          <Editor
            tabs={notes.tabs}
            activeTabPath={notes.activeTabPath}
            entries={vault.entries}
            onNavigateWikilink={notes.handleNavigateWikilink}
            onLoadDiff={vault.loadDiff}
            onLoadDiffAtCommit={vault.loadDiffAtCommit}
            pendingCommitDiffRequest={pulseCommitDiffRequest}
            onPendingCommitDiffHandled={handlePulseCommitDiffHandled}
            getNoteStatus={vault.getNoteStatus}
            onCreateNote={notes.handleCreateNoteImmediate}
            inspectorCollapsed={layout.inspectorCollapsed}
            onToggleInspector={handleToggleInspector}
            inspectorWidth={layout.inspectorWidth}
            defaultAiAgent={aiAgentPreferences.defaultAiAgent}
            defaultAiAgentReady={aiAgentPreferences.defaultAiAgentReady}
            onInspectorResize={layout.handleInspectorResize}
            inspectorEntry={activeTab?.entry ?? null}
            inspectorContent={activeTab?.content ?? null}
            gitHistory={gitHistory}
            onUpdateFrontmatter={notes.handleUpdateFrontmatter}
            onDeleteProperty={notes.handleDeleteProperty}
            onAddProperty={notes.handleAddProperty}
            onCreateMissingType={handleCreateMissingType}
            onCreateAndOpenNote={notes.handleCreateNoteForRelationship}
            onInitializeProperties={handleInitializeProperties}
            showAIChat={dialogs.showAIChat}
            onToggleAIChat={dialogs.toggleAIChat}
            vaultPath={resolvedPath}
            noteList={aiNoteList}
            noteListFilter={aiNoteListFilter}
            onToggleFavorite={activeDeletedFile ? undefined : entryActions.handleToggleFavorite}
            onToggleOrganized={activeDeletedFile || !explicitOrganizationEnabled ? undefined : entryActions.handleToggleOrganized}
            onDeleteNote={activeDeletedFile ? undefined : deleteActions.handleDeleteNote}
            onArchiveNote={activeDeletedFile ? undefined : entryActions.handleArchiveNote}
            onUnarchiveNote={activeDeletedFile ? undefined : entryActions.handleUnarchiveNote}
            onContentChange={handleTrackedContentChange}
            onSave={handleTrackedSave}
            onRenameFilename={activeDeletedFile ? undefined : appSave.handleFilenameRename}
            rawToggleRef={rawToggleRef}
            diffToggleRef={diffToggleRef}
            canGoBack={canGoBack}
            canGoForward={canGoForward}
            onGoBack={handleGoBack}
            onGoForward={handleGoForward}
            leftPanelsCollapsed={!sidebarVisible && !noteListVisible}
            onFileCreated={vaultBridge.handleAgentFileCreated}
            onFileModified={vaultBridge.handleAgentFileModified}
            onVaultChanged={vaultBridge.handleAgentVaultChanged}
            isConflicted={conflictFlow.isConflicted}
            onKeepMine={conflictFlow.handleKeepMine}
            onKeepTheirs={conflictFlow.handleKeepTheirs}
            flushPendingRawContentRef={flushPendingRawContentRef}
          />
        </div>
      </div>
      <UpdateBanner status={updateStatus} actions={updateActions} />
      <RenameDetectedBanner renames={detectedRenames} onUpdate={handleUpdateWikilinks} onDismiss={handleDismissRenames} />
      <StatusBar noteCount={vault.entries.length} modifiedCount={vault.modifiedFiles.length} vaultPath={resolvedPath} vaults={vaultSwitcher.allVaults} onSwitchVault={vaultSwitcher.switchVault} onOpenSettings={dialogs.openSettings} onOpenFeedback={openFeedback} onOpenLocalFolder={vaultSwitcher.handleOpenLocalFolder} onCreateEmptyVault={vaultSwitcher.handleCreateEmptyVault} onCloneVault={dialogs.openCloneVault} onCloneGettingStarted={cloneGettingStartedVault} onClickPending={() => handleSetSelection({ kind: 'filter', filter: 'changes' })} onClickPulse={() => handleSetSelection({ kind: 'filter', filter: 'pulse' })} onCommitPush={handleCommitPush} isOffline={networkStatus.isOffline} isGitVault={isGitVault} syncStatus={autoSync.syncStatus} lastSyncTime={autoSync.lastSyncTime} conflictCount={autoSync.conflictFiles.length} remoteStatus={autoSync.remoteStatus} onTriggerSync={autoSync.triggerSync} onPullAndPush={autoSync.pullAndPush} onOpenConflictResolver={conflictFlow.handleOpenConflictResolver} zoomLevel={zoom.zoomLevel} onZoomReset={zoom.zoomReset} buildNumber={buildNumber} onCheckForUpdates={handleCheckForUpdates} onRemoveVault={vaultSwitcher.removeVault} mcpStatus={mcpStatus} onInstallMcp={installMcp} aiAgentsStatus={aiAgentsStatus} vaultAiGuidanceStatus={vaultAiGuidanceStatus} defaultAiAgent={aiAgentPreferences.defaultAiAgent} onSetDefaultAiAgent={aiAgentPreferences.setDefaultAiAgent} onRestoreVaultAiGuidance={() => { void restoreVaultAiGuidance() }} />
      <DeleteProgressNotice count={deleteActions.pendingDeleteCount} />
      <Toast message={toastMessage} onDismiss={() => setToastMessage(null)} />
      <QuickOpenPalette open={dialogs.showQuickOpen} entries={vault.entries} onSelect={notes.handleSelectNote} onClose={dialogs.closeQuickOpen} />
      <CommandPalette
        open={dialogs.showCommandPalette}
        commands={commands}
        entries={vault.entries}
        aiAgentReady={aiAgentPreferences.defaultAiAgentReady}
        aiAgentLabel={aiAgentPreferences.defaultAiAgentLabel}
        onClose={dialogs.closeCommandPalette}
      />
      <SearchPanel open={dialogs.showSearch} vaultPath={resolvedPath} entries={vault.entries} onSelectNote={notes.handleSelectNote} onClose={dialogs.closeSearch} />
      <CreateTypeDialog open={dialogs.showCreateTypeDialog} onClose={dialogs.closeCreateType} onCreate={handleCreateType} />
      <CreateViewDialog open={dialogs.showCreateViewDialog} onClose={dialogs.closeCreateView} onCreate={handleCreateOrUpdateView} availableFields={availableFields} editingView={dialogs.editingView?.definition ?? null} />
      <CommitDialog
        open={commitFlow.showCommitDialog}
        modifiedCount={vault.modifiedFiles.length}
        commitMode={commitFlow.commitMode}
        suggestedMessage={suggestedCommitMessage}
        onCommit={commitFlow.handleCommitPush}
        onClose={commitFlow.closeCommitDialog}
      />
      <ConflictResolverModal
        open={dialogs.showConflictResolver}
        fileStates={conflictResolver.fileStates}
        allResolved={conflictResolver.allResolved}
        committing={conflictResolver.committing}
        error={conflictResolver.error}
        onResolveFile={conflictResolver.resolveFile}
        onOpenInEditor={conflictResolver.openInEditor}
        onCommit={conflictResolver.commitResolution}
        onClose={conflictFlow.handleCloseConflictResolver}
      />
      <SettingsPanel open={dialogs.showSettings} settings={settings} aiAgentsStatus={aiAgentsStatus} isGitVault={isGitVault} onSave={saveSettings} explicitOrganizationEnabled={explicitOrganizationEnabled} onSaveExplicitOrganization={handleSaveExplicitOrganization} onClose={dialogs.closeSettings} />
      <FeedbackDialog open={showFeedback} onClose={closeFeedback} />
      <CloneVaultModal key={dialogs.showCloneVault ? 'clone-open' : 'clone-closed'} open={dialogs.showCloneVault} onClose={dialogs.closeCloneVault} onVaultCloned={vaultSwitcher.handleVaultCloned} />
      {deleteActions.confirmDelete && (
        <ConfirmDeleteDialog
          open={true}
          title={deleteActions.confirmDelete.title}
          message={deleteActions.confirmDelete.message}
          confirmLabel={deleteActions.confirmDelete.confirmLabel}
          onConfirm={deleteActions.confirmDelete.onConfirm}
          onCancel={() => deleteActions.setConfirmDelete(null)}
        />
      )}
    </div>
  )
}

type OnboardingState = ReturnType<typeof useOnboarding>

/** Welcome screen view - extracted from main App component */
function WelcomeView({ onboarding, isOffline }: { onboarding: OnboardingState; isOffline: boolean }) {
  const state = onboarding.state as { status: 'welcome' | 'vault-missing'; defaultPath: string; vaultPath?: string }
  return (
    <div className="app-shell">
      <WelcomeScreen
        mode={state.status === 'welcome' ? 'welcome' : 'vault-missing'}
        missingPath={state.status === 'vault-missing' ? state.vaultPath : undefined}
        defaultVaultPath={state.defaultPath}
        onCreateVault={onboarding.handleCreateVault}
        onRetryCreateVault={onboarding.retryCreateVault}
        onCreateEmptyVault={onboarding.handleCreateEmptyVault}
        onOpenFolder={onboarding.handleOpenFolder}
        isOffline={isOffline}
        creatingAction={onboarding.creatingAction}
        error={onboarding.error}
        canRetryTemplate={onboarding.canRetryTemplate}
      />
    </div>
  )
}

function AiAgentsOnboardingView({
  statuses,
  onContinue,
}: {
  statuses: ReturnType<typeof useAiAgentsStatus>
  onContinue: () => void
}) {
  return (
    <div className="app-shell">
      <AiAgentsOnboardingPrompt statuses={statuses} onContinue={onContinue} />
    </div>
  )
}

/** Loading spinner view - extracted from main App component */
function LoadingView() {
  return (
    <div className="app-shell">
      <div style={{ width: '100%', height: '100%', display: 'flex', alignItems: 'center', justifyContent: 'center', background: 'var(--sidebar)' }}>
        <span style={{ color: 'var(--muted-foreground)', fontSize: 14 }}>Loading…</span>
      </div>
    </div>
  )
}

export default App