// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package atspi

/*
#include "adapter_native.h"
*/
import "C"

import (
	"net/url"
	"runtime/cgo"
	"strings"
	"time"
	"unsafe"
)

func shouldSpeakEvent(eventType string, detail1 int) bool {
	return eventType != FocusedStateEvent || detail1 == 1
}

// Every completion that can acquire document focus needs a retained native
// source for the subsequent context lookup, even without load-complete.
func shouldRetainNativeFocus(eventType string, detail1 int, chromeFocus ObjectID) bool {
	switch eventType {
	case FocusEvent, FocusedStateEvent, WindowActivatedEvent, ActiveDescendantEvent, SelectionChangedEvent, CaretEvent:
		return true
	case DocumentLoadCompleteEvent, DocumentLoadStoppedEvent:
		return !chromeFocus.Valid()
	case BusyStateEvent:
		return detail1 == 0 && !chromeFocus.Valid()
	default:
		return false
	}
}

// selectNativeEventTarget returns a borrowed event source or a retained target.
// The callback releases a retained target after all native queries finish.
func selectNativeEventTarget(event *C.AtspiEvent, eventType string) (*C.AtspiAccessible, bool) {
	target := event.source
	ownedTarget := false
	switch eventType {
	case FocusEvent, FocusedStateEvent:
		target = C.cthulhu_combo_ancestor(event.source)
		if target == nil {
			target = event.source
		} else {
			ownedTarget = true
		}
		// A table's first selected child is its active child only when the
		// selection is unique. Multi-selection changes use their own events.
		targetRole := C.atspi_accessible_get_role(target, nil)
		tableContainer := C.cthulhu_is_table_container(target) != 0
		// GTK notebooks report container focus before the active tab when an
		// X11 key grab ends. Resolve that container to its selected tab, as
		// with menus, so ordinary duplicate-focus handling preserves review.
		if targetRole == C.ATSPI_ROLE_MENU || targetRole == C.ATSPI_ROLE_PAGE_TAB_LIST || tableContainer {
			var child *C.AtspiAccessible
			if tableContainer {
				child = C.cthulhu_table_selected_child(target)
			} else {
				child = C.cthulhu_selected_child(target)
			}
			if child != nil {
				if ownedTarget {
					C.g_object_unref(C.gpointer(target))
				}
				target = child
				ownedTarget = true
			}
		}
	case WindowActivatedEvent:
		C.cthulhu_refresh_frame_children(event.source)
		target = C.cthulhu_popup_menu_target(event.source)
		if target == nil {
			target = C.cthulhu_focused_descendant(event.source)
		}
		if target == nil {
			target = C.cthulhu_showing_web_document(event.source)
		}
		if target != nil {
			ownedTarget = true
		} else {
			target = event.source
		}
	case ActiveDescendantEvent:
		target = C.cthulhu_event_active_descendant(event)
	case SelectionChangedEvent:
		if C.atspi_accessible_get_role(event.source, nil) == C.ATSPI_ROLE_PAGE_TAB_LIST {
			// libatspi resolves the selected child's index through its cached
			// child list. Tab creation/removal makes that list stale.
			C.atspi_accessible_clear_cache_single(event.source)
		}
		if C.cthulhu_is_table_container(event.source) != 0 {
			target = C.cthulhu_table_selected_child(event.source)
		} else {
			target = C.cthulhu_selected_child(event.source)
		}
		ownedTarget = target != nil
	}
	return target, ownedTarget
}

// captureNativeEventSnapshot enriches the target without changing event ownership.
// It runs on the GLib owner and retains no native references.
func (adapter *Adapter) captureNativeEventSnapshot(event *C.AtspiEvent, target *C.AtspiAccessible, eventType string, originID ObjectID, live nativeLiveProperties) (Snapshot, ObjectID) {
	// Document focus/load presentation needs only the title. Real caret
	// events still capture text, including carets hosted on document roots.
	captureCaret := !isDocumentLifecycleEvent(eventType) && eventType != BusyStateEvent
	if eventType == FocusEvent || eventType == FocusedStateEvent {
		role := C.atspi_accessible_get_role(target, nil)
		captureCaret = role != C.ATSPI_ROLE_DOCUMENT_WEB && role != C.ATSPI_ROLE_DOCUMENT_FRAME && role != C.ATSPI_ROLE_EMBEDDED
	}
	snapshot := snapshotFromNativeWithCaret(target, captureCaret, eventType == CaretEvent, false, adapter.captureSound.Load(), adapter.captureTextAttributes.Load())
	if eventType == CaretEvent {
		if combo := C.cthulhu_read_only_combo(target); combo != nil {
			snapshot.ReadOnlyCombo = nativeObjectID(combo)
			C.g_object_unref(C.gpointer(combo))
		}
	}
	if snapshot.Editable && (eventType == CaretEvent || eventType == TextInsertedEvent ||
		eventType == TextDeletedEvent || eventType == TextSelectionChangedEvent) {
		if editor := C.cthulhu_editable_root(target); editor != nil {
			snapshot.EditableRoot = nativeObjectID(editor)
			C.g_object_unref(C.gpointer(editor))
		}
	}
	snapshot.ApplicationProcess = adapter.applicationProcess(target)
	if snapshot.Role == "slider" ||
		snapshot.Role == "combo box" && (snapshot.Name == "Key echo speech synthesizer" || snapshot.Name == "Key echo person") {
		snapshot.ApplicationPID = int(C.atspi_accessible_get_process_id(target, nil))
	}
	if snapshot.Role == "combo box" && strings.EqualFold(snapshot.ApplicationProcess, "firefox") {
		snapshot.Autocomplete = snapshot.Autocomplete ||
			isFirefoxChromeAutocomplete(snapshot, C.cthulhu_in_active_document(target) != 0)
	}
	if eventType == TextInsertedEvent || eventType == ChildrenAddedEvent {
		snapshot.LivePoliteness = live.politeness
		snapshot.LiveRegion = live.politeness != "" && C.cthulhu_in_active_document(event.source) != 0
		if snapshot.LiveRegion {
			snapshot.LiveAtomic = live.atomic
			if eventType == TextInsertedEvent && snapshot.LiveAtomic {
				text := C.cthulhu_atomic_live_content(event.source)
				snapshot.Text = sanitizeSnapshotField(C.GoString(text))
				C.g_free(C.gpointer(text))
			}
			if eventType == ChildrenAddedEvent {
				if child := C.cthulhu_event_active_descendant(event); child != nil {
					text := C.cthulhu_live_content(child)
					if snapshot.LiveAtomic {
						C.g_free(C.gpointer(text))
						text = C.cthulhu_atomic_live_content(event.source)
					}
					snapshot.Text = sanitizeSnapshotField(C.GoString(text))
					C.g_free(C.gpointer(text))
				}
			}
		}
	}
	if snapshot.BusName == "" {
		snapshot.BusName = originID.BusName
	}
	if eventType == CaretEvent {
		adapter.repairNativeCaretLine(target, &snapshot, int(C.cthulhu_event_detail1(event)))
	}
	if eventType == AccessibleNameEvent || snapshot.Role == "page tab" {
		toolkit := C.atspi_accessible_get_toolkit_name(target, nil)
		snapshot.ToolkitName = sanitizeSnapshotField(C.GoString(toolkit))
		C.g_free(C.gpointer(toolkit))
	}
	if snapshot.Role == "page tab" {
		document := C.cthulhu_document_ancestor(target)
		snapshot.BrowserTab = isBrowserChromeTab(snapshot, document != nil)
		if document != nil {
			C.g_object_unref(C.gpointer(document))
		}
	}
	if (eventType == WindowCreateEvent || eventType == WindowActivatedEvent) && snapshot.Role == "frame" {
		if labels := C.cthulhu_collect_simple_prompt_text(target); labels != nil {
			snapshot.Text = sanitizeSnapshotField(C.GoString(labels))
			C.g_free(C.gpointer(labels))
		}
	}
	if eventType == WindowCreateEvent {
		if snapshot.Role == "alert" {
			if labels := C.cthulhu_collect_notification_text(target); labels != nil {
				snapshot.Text = sanitizeSnapshotField(C.GoString(labels))
				C.g_free(C.gpointer(labels))
			}
		}
		switch strings.ToLower(snapshot.ApplicationName) {
		case "notification-daemon", "notify-osd", "xfce4-notifyd", "mate-notification-daemon":
			if labels := C.cthulhu_collect_notification_text(target); labels != nil {
				snapshot.Text = sanitizeSnapshotField(C.GoString(labels))
				C.g_free(C.gpointer(labels))
			}
		}
	}
	if snapshot.Autocomplete && (eventType == TextInsertedEvent || eventType == TextDeletedEvent ||
		eventType == FocusEvent || eventType == FocusedStateEvent) {
		text := C.atspi_accessible_get_text(target)
		if text != nil && C.atspi_text_get_n_selections(text, nil) > 0 {
			selection := C.atspi_text_get_selection(text, 0, nil)
			if selection != nil {
				snapshot.SelectionStart, snapshot.SelectionEnd = int(selection.start_offset), int(selection.end_offset)
				if selection.start_offset > 0 && selection.end_offset == C.atspi_text_get_character_count(text, nil) {
					prefix := C.atspi_text_get_text(text, selection.start_offset-1, selection.start_offset, nil)
					snapshot.CompletionPrefixCharacter = sanitizeCaretCharacter(C.GoString(prefix))
					C.g_free(C.gpointer(prefix))
				}
				C.g_free(C.gpointer(selection))
			}
		}
		if text != nil {
			C.g_object_unref(C.gpointer(text))
		}
	}

	// A read-only combo child only mirrors the chosen value. Qt 6.9 can stop
	// answering accessibility requests after its word-at-caret query; no word
	// feedback is needed for this non-writable selection proxy.
	if eventType == CaretEvent && snapshot.Role != "password text" && !snapshot.ReadOnlyCombo.Valid() {
		word := C.cthulhu_capture_caret_unit(target, C.ATSPI_TEXT_GRANULARITY_WORD)
		snapshot.CaretWord = sanitizeSnapshotField(C.GoString(word))
		C.g_free(C.gpointer(word))
	}
	var popupFor ObjectID
	if snapshot.Role == "list item" || snapshot.Role == "list box" || snapshot.Role == "menu item" ||
		snapshot.Role == "button" || snapshot.Role == "push button" || snapshot.Role == "toggle button" {
		if popupTarget := C.cthulhu_autocomplete_popup_target(target); popupTarget != nil {
			popupFor = nativeObjectID(popupTarget)
			snapshot.AutocompletePopup = popupFor.Valid()
			C.g_object_unref(C.gpointer(popupTarget))
		}
	}
	return snapshot, popupFor
}

// nativeWindowDescription runs on the GLib owner for both toolkit events and
// foreground recovery. A table can acquire focus before its frame cache is ready.
func nativeWindowDescription(window *C.AtspiAccessible, eventType, role string) string {
	description := C.atspi_accessible_get_description(window, nil)
	if (description == nil || C.GoString(description) == "") &&
		(role == "table" || role == "table cell") &&
		(eventType == WindowActivatedEvent || eventType == FocusEvent || eventType == FocusedStateEvent) {
		C.g_free(C.gpointer(description))
		C.atspi_accessible_clear_cache_single(window)
		description = C.atspi_accessible_get_description(window, nil)
	}
	result := sanitizeSnapshotField(C.GoString(description))
	C.g_free(C.gpointer(description))
	return result
}

// enrichNativeWindowEvent queries and releases the window on the GLib owner.
// It applies foreground, tab/document, table, and prompt state in query order.
func (adapter *Adapter) enrichNativeWindowEvent(event *C.AtspiEvent, target *C.AtspiAccessible, eventType string, snapshot Snapshot, focusEvent *Event) {
	webNotification := focusEvent.WebNotification
	window := C.cthulhu_window_ancestor(event.source)
	var restoredDocument ObjectID
	if window == nil && (eventType == FocusedStateEvent || eventType == FocusEvent || eventType == CaretEvent) {
		window, restoredDocument = adapter.detachedDocumentWindow(event.source, eventType, focusEvent.Detail1)
	}
	focusEvent.Window = nativeObjectID(window)
	if webNotification != nil {
		webNotification.WindowPath = focusEvent.Window.Path
		if adapter.webNotificationRoots == nil || len(adapter.webNotificationRoots) >= 64 {
			adapter.webNotificationRoots = make(map[ObjectID]bool)
		}
		adapter.webNotificationRoots[NewObjectID(webNotification.BusName, webNotification.RootPath)] = true
	}
	focusEvent.WindowRecovered = restoredDocument.Valid()
	if eventType == WindowActivatedEvent && (snapshot.Role == "tree table" || snapshot.Role == "table cell") && window != nil {
		if labels := C.cthulhu_collect_simple_prompt_text(window); labels != nil {
			focusEvent.WindowMessage = sanitizeSnapshotField(C.GoString(labels))
			C.g_free(C.gpointer(labels))
		}
		if focusEvent.WindowMessage == "" && focusEvent.Window.Valid() {
			adapter.promptRefreshWindow = focusEvent.Window
		}
	}
	if eventType == WindowActivatedEvent && window != nil {
		name := C.atspi_accessible_get_name(window, nil)
		focusEvent.WindowTitle = sanitizeSnapshotField(C.GoString(name))
		C.g_free(C.gpointer(name))
	}
	focusEvent.Foreground = adapter.Foreground()
	focusedMenuItem := (eventType == FocusEvent || eventType == FocusedStateEvent) &&
		(snapshot.Role == "menu item" || snapshot.Role == "check menu item" || snapshot.Role == "radio menu item") && snapshot.Focused
	if eventType == WindowActivatedEvent {
		focusEvent.ForegroundMismatch = !adapter.matchForeground(window, focusEvent.Window, &focusEvent.ForegroundCheck, false)
	} else {
		focusEvent.ForegroundMismatch = !adapter.matchForeground(window, focusEvent.Window, nil, focusedMenuItem)
	}
	if !focusEvent.ForegroundMismatch && window != nil &&
		(eventType == WindowActivatedEvent || snapshot.Role == "table" || snapshot.Role == "table cell") {
		focusEvent.WindowDescription = nativeWindowDescription(window, eventType, snapshot.Role)
	}
	if !focusEvent.ForegroundMismatch &&
		(eventType == WindowActivatedEvent || eventType == FocusEvent || eventType == FocusedStateEvent ||
			eventType == SelectionChangedEvent || eventType == ActiveDescendantEvent ||
			eventType == AccessibleNameEvent && snapshot.Role == "table cell") &&
		(snapshot.Role == "table" || snapshot.Role == "table cell") {
		var rows, columns C.gint
		var tableName, tablePath *C.gchar
		var rowIndex, columnIndex C.gint
		var guiTable C.gboolean
		rowText := C.cthulhu_table_context(target, &rows, &columns, &tableName,
			&tablePath, &rowIndex, &columnIndex, &guiTable)
		snapshot.TableRowCount = int(rows)
		snapshot.TableColumnCount = int(columns)
		snapshot.TableName = sanitizeSnapshotField(C.GoString(tableName))
		snapshot.TablePath = sanitizeSnapshotField(C.GoString(tablePath))
		snapshot.TableRowIndex = int(rowIndex)
		snapshot.TableColumnIndex = int(columnIndex)
		snapshot.TablePositionKnown = rowIndex >= 0 && columnIndex >= 0
		snapshot.TableRowText = sanitizeSnapshotField(C.GoString(rowText))
		snapshot.GUITable = guiTable != 0
		snapshot.TableRowText = mumbleTableRowText(snapshot)
		C.g_free(C.gpointer(tableName))
		C.g_free(C.gpointer(tablePath))
		C.g_free(C.gpointer(rowText))
		focusEvent.Source = snapshot
	}
	if !focusEvent.ForegroundMismatch {
		captureLibreOfficeContext(target, &snapshot)
		adapter.captureLibreOfficeHeaders(target, &snapshot, focusEvent.Window)
		if eventType == SelectionChangedEvent && snapshot.Role == "table" &&
			snapshot.LibreOffice != nil && snapshot.LibreOffice.InSpreadsheet {
			snapshot.LibreOffice.Selection = captureLibreOfficeSelection(target)
		}
		focusEvent.Source = snapshot
		if eventType == FocusEvent || eventType == FocusedStateEvent && focusEvent.Detail1 != 0 || eventType == CaretEvent || eventType == ActiveDescendantEvent || eventType == SelectionChangedEvent {
			snapshot.SpeechContext, snapshot.BrailleContext = native_speech_context(target)
			for _, ancestor := range snapshot.SpeechContext {
				if ancestor.Role == "document spreadsheet" {
					snapshot.Spreadsheet = true
				}
			}
			focusEvent.Source = snapshot
		}
		if snapshot.BrowserTab && (eventType == SelectedStateEvent && focusEvent.Detail1 != 0 && snapshot.Selected ||
			eventType == SelectionChangedEvent && snapshot.Selected && strings.EqualFold(snapshot.ToolkitName, "Gecko")) {
			adapter.selectedTabWindow = focusEvent.Window
			adapter.activeDocument = ObjectID{}
			adapter.deferredLiveRegions = nil
		}
		if IsWebDocumentRole(snapshot.Role) &&
			(eventType == WindowActivatedEvent || eventType == FocusEvent || eventType == FocusedStateEvent && focusEvent.Detail1 != 0 || eventType == DocumentLoadCompleteEvent) {
			adapter.rememberDocumentWindow(snapshot.ID(), window)
			adapter.activeDocument = snapshot.ID()
			adapter.selectedTabWindow = ObjectID{}
		} else if restoredDocument.Valid() {
			adapter.activeDocument = restoredDocument
		}
	}
	if (eventType == WindowCreateEvent || eventType == WindowActivatedEvent) && snapshot.Role == "frame" {
		adapter.promptRefreshWindow = ObjectID{}
		if !focusEvent.ForegroundMismatch && snapshot.Text == "" && focusEvent.Window.Valid() {
			adapter.promptRefreshWindow = focusEvent.Window
		}
		if eventType == WindowActivatedEvent && !focusEvent.ForegroundMismatch {
			adapter.promptScannedWindow = focusEvent.Window
			adapter.promptScannedEpoch = focusEvent.Foreground.Epoch
		}
	}
	if eventType == WindowActivatedEvent && snapshot.Role == "button" &&
		!focusEvent.ForegroundMismatch && window != nil && focusEvent.Window.Valid() &&
		(adapter.promptScannedWindow != focusEvent.Window || adapter.promptScannedEpoch != focusEvent.Foreground.Epoch) {
		adapter.promptScannedWindow = focusEvent.Window
		adapter.promptScannedEpoch = focusEvent.Foreground.Epoch
		if labels := C.cthulhu_collect_simple_prompt_text(window); labels != nil {
			focusEvent.WindowMessage = sanitizeSnapshotField(C.GoString(labels))
			C.g_free(C.gpointer(labels))
		}
		if focusEvent.WindowMessage == "" {
			adapter.promptRefreshWindow = focusEvent.Window
		} else {
			adapter.promptRefreshWindow = ObjectID{}
		}
	}
	if !focusEvent.ForegroundMismatch && window != nil &&
		(eventType == FocusEvent || eventType == FocusedStateEvent && focusEvent.Detail1 == 1) &&
		(snapshot.Role == "button" || snapshot.Role == "tree table" || snapshot.Role == "table cell") && focusEvent.Window == adapter.promptRefreshWindow {
		if labels := C.cthulhu_collect_simple_prompt_text(window); labels != nil {
			focusEvent.WindowMessage = sanitizeSnapshotField(C.GoString(labels))
			C.g_free(C.gpointer(labels))
			if focusEvent.WindowMessage != "" {
				adapter.promptRefreshWindow = ObjectID{}
			}
		}
	}
	if window != nil {
		C.g_object_unref(C.gpointer(window))
	}
}

//export cthulhuAtspiEventCallback
func cthulhuAtspiEventCallback(event *C.AtspiEvent, userData unsafe.Pointer) {
	dispatch_native_event(event, userData, false, 0)
}

//export cthulhuAtspiSelectionCallback
func cthulhuAtspiSelectionCallback(event *C.AtspiEvent, userData unsafe.Pointer, epoch C.uint64_t) {
	dispatch_native_event(event, userData, true, uint64(epoch))
}

func dispatch_native_event(event *C.AtspiEvent, userData unsafe.Pointer, deferredSelection bool, selectionEpoch uint64) {
	if event == nil || userData == nil {
		return
	}
	callbackHandle := cgo.Handle(C.cthulhu_callback_value((*C.cthulhu_callback_data)(userData)))
	value := callbackHandle.Value()
	adapter, validAdapter := value.(*Adapter)
	if !validAdapter {
		return
	}
	secureEpoch := adapter.secureEpoch.Load()
	if deferredSelection && (selectionEpoch != secureEpoch || adapter.secure.Load()) {
		return
	}
	// Retire copied header identities even while locked. Tab lifecycle only
	// checks roles; it never captures text or presents output.
	nativeEventType := C.GoString(C.cthulhu_event_type(event))
	if strings.HasPrefix(nativeEventType, MouseButtonEvent+":") {
		if !adapter.secure.Load() && strings.HasSuffix(nativeEventType, "p") {
			// Like Orca, observe the shared AT-SPI pointer signal. No object
			// capture or pointer coordinates are needed for navigation handoff.
			clear(adapter.navigationEcho)
			adapter.enqueueSecureEvent(Event{Type: MouseButtonEvent}, secureEpoch)
		}
		return
	}
	eventType := canonicalObjectChangeEventType(nativeEventType)
	originID := nativeObjectID(event.source)
	adapter.retireEchoFocus(eventType, int(C.cthulhu_event_detail1(event)), originID)
	// Retired GTK cells can emit hundreds of obsolete focus/selection claims
	// during a rebuild. Leave lifecycle retirement on its established path,
	// but avoid all snapshot and foreground queries for known-dead targets.
	switch eventType {
	case FocusEvent, FocusedStateEvent, SelectedStateEvent, SelectionChangedEvent, ActiveDescendantEvent:
		if C.cthulhu_accessible_known_dead(event.source) != 0 ||
			eventType == ActiveDescendantEvent && C.cthulhu_accessible_known_dead(C.cthulhu_event_active_descendant(event)) != 0 {
			return
		}
	}
	if eventType == AccessibleNameEvent || eventType == DefunctStateEvent && C.cthulhu_event_detail1(event) != 0 {
		C.cthulhu_forget_menu_checkability(event.source)
	}
	if eventType != DefunctStateEvent || C.cthulhu_event_detail1(event) != 0 {
		adapter.retireLibreOfficeHeaders(event.source, eventType, originID)
	}
	if adapter.secure.Load() {
		return
	}
	if eventType == "object:state-changed:checked" &&
		C.atspi_accessible_get_role(event.source, nil) == C.ATSPI_ROLE_MENU_ITEM {
		C.cthulhu_note_menu_checkability(event.source)
	}

	adapter.applySecureReset()
	gtkSelection := eventType == SelectionChangedEvent && C.cthulhu_gtk_table(event.source, 0) != 0
	// Structural events which only invalidate caches do not need a captured
	// selection between every removed row. A structural event that survives
	// invalidation below still flushes before its ordinary presentation path.
	selectionBoundary := eventType != DefunctStateEvent && !strings.HasPrefix(eventType, ChildrenChangedEvent)
	if !deferredSelection && selectionBoundary {
		if gtkSelection {
			C.cthulhu_flush_other_selection(adapter.callbackData, event.source)
		} else {
			C.cthulhu_flush_selection(adapter.callbackData)
		}
	}
	adapter.refreshForeground()
	if isDocumentLifecycleEvent(eventType) || eventType == DefunctStateEvent && C.cthulhu_event_detail1(event) != 0 {
		adapter.deferredLiveRegions.take(originID)
		adapter.deferredLiveRegions.forget_document(originID)
	}
	if eventType == DefunctStateEvent && C.cthulhu_event_detail1(event) != 0 {
		adapter.forgetDocumentWindow(originID)
	} else if eventType == WindowDestroyedEvent {
		adapter.forgetWindowDocuments(originID)
	}
	invalidated := adapter.applyTreeInvalidation(eventType, event)
	returnedTarget := adapter.returned_menu_item(event, eventType, originID)
	if returnedTarget != nil {
		defer C.g_object_unref(C.gpointer(returnedTarget))
		// Keep the original showing event and popup origin in diagnostics.
		// Only fresh focus on its parent supplies this normalized focus event.
		eventType, invalidated = FocusEvent, false
	}
	if selection := adapter.window_switcher_event(event, eventType); selection != nil {
		adapter.enqueueSecureEvent(*selection, secureEpoch)
		return
	}
	if eventType == DefunctStateEvent && C.cthulhu_event_detail1(event) != 0 &&
		(adapter.applicationProcesses[originID.BusName] == "pidgin" || adapter.applicationProcesses[originID.BusName] == "mumble") {
		// Read-only transcripts need not own native focus. Forward their
		// retirement before the ordinary dead-object early return, without
		// querying a destroyed accessible or broadening focus ownership.
		retired := NewEvent(eventType, Snapshot{BusName: originID.BusName, Path: originID.Path,
			ApplicationProcess: adapter.applicationProcesses[originID.BusName], Defunct: true})
		retired.Detail1 = 1
		adapter.enqueueSecureEvent(retired, secureEpoch)
		return
	}
	if eventType == DefunctStateEvent && C.cthulhu_event_detail1(event) != 0 && adapter.webNotificationRoots[originID] {
		delete(adapter.webNotificationRoots, originID)
		// Retire a known toast before the normal dead-object early return.
		// Do not query or retain the accessible which has just been destroyed.
		retired := NewEvent(eventType, Snapshot{BusName: originID.BusName, Path: originID.Path, Defunct: true})
		retired.Detail1 = 1
		adapter.enqueueSecureEvent(retired, secureEpoch)
		return
	}
	// Showing/child-added events normally finish at invalidation. A matched
	// notification script needs their semantics before that early return,
	// including when the provider is outside foreground ownership.
	webNotification := adapter.webNotification(event)
	message := adapter.pidginMessage(event)
	if message == nil {
		message = adapter.mumbleMessage(event)
	}
	if message != nil {
		// A transcript insertion is a passive announcement. Keep it out of
		// native focus capture, selected-descendant resolution and review.
		roleName := C.atspi_accessible_get_role_name(event.source, nil)
		chatEvent := NewEvent(TextInsertedEvent, Snapshot{BusName: message.Provider,
			Path: message.Conversation, Role: C.GoString(roleName), ApplicationProcess: adapter.applicationProcesses[originID.BusName]})
		C.g_free(C.gpointer(roleName))
		chatEvent.ChatMessage = message
		chatEvent.Window = NewObjectID(message.Provider, message.Window)
		chatEvent.Foreground = adapter.Foreground()
		adapter.enqueueSecureEvent(chatEvent, secureEpoch)
		return
	}
	if invalidated && webNotification == nil && eventType != ChildrenAddedEvent && (eventType != DefunctStateEvent || !adapter.nativeFocusIs(originID)) {
		return
	}
	if !shouldSpeakEvent(eventType, int(C.cthulhu_event_detail1(event))) {
		return
	}
	if adapter.filterNativeBackgroundEvent(event, eventType, originID, webNotification != nil) {
		adapter.backgroundEventsFiltered.Add(1)
		return
	}
	// Seed an unknown toolkit identity only after foreground filtering, so a
	// background provider never delays this path with a toolkit lookup.
	if !deferredSelection && eventType == SelectionChangedEvent &&
		(gtkSelection || C.cthulhu_gtk_table(event.source, 1) != 0) {
		C.cthulhu_defer_selection(adapter.callbackData, event, C.uint64_t(secureEpoch))
		return
	}
	if tab := addedSelectedBrowserTab(event, eventType); tab != nil {
		defer C.g_object_unref(C.gpointer(tab))
		returnedTarget = tab
		eventType, invalidated = SelectionChangedEvent, false
	}
	var live nativeLiveProperties
	if eventType == TextInsertedEvent || eventType == ChildrenAddedEvent || eventType == BusyStateEvent {
		live = capture_live_properties(event.source)
	}
	if invalidated && webNotification == nil && eventType == ChildrenAddedEvent && (live.politeness == "" || live.politeness == "off") {
		return
	}
	if !deferredSelection && !selectionBoundary {
		C.cthulhu_flush_selection(adapter.callbackData)
	}
	deferLive, completeLive := adapter.prepare_live_region(event, eventType, originID, live)
	if deferLive {
		return
	}
	if completeLive {
		eventType = TextInsertedEvent
	}
	if (isDocumentLifecycleEvent(eventType) || eventType == BusyStateEvent) && C.cthulhu_active_document(event.source) == 0 {
		return
	}
	snapshotStarted := time.Now()
	target, ownedTarget := adapter.resolveNativeEventTarget(event, eventType, returnedTarget)
	if target == nil {
		return
	}
	if (eventType == FocusEvent || eventType == FocusedStateEvent || eventType == SelectedStateEvent ||
		eventType == ActiveDescendantEvent || eventType == SelectionChangedEvent) && C.cthulhu_accessible_known_dead(target) != 0 {
		if ownedTarget {
			C.g_object_unref(C.gpointer(target))
		}
		return
	}
	refreshNativeEventTarget(event, target, eventType)
	snapshot, popupFor, payload := adapter.captureNativeEventContent(event, target, eventType, originID, live, completeLive)
	eventType, inlineMenuID := normalizeNativeMenuFocus(event, target, eventType, originID, &snapshot)
	// Chromium can drop ACTIVE from its visible main frame while a tiny
	// same-process sibling claims it. On X11, the correlated foreground
	// window is the stronger ownership check performed below. Keep the
	// AT-SPI state filter when no X11 ownership data is available.
	progressUpdate := snapshot.Role == "progress bar" && (eventType == ValueChangedEvent || eventType == AccessibleValueEvent)
	inactiveProgress := progressUpdate && !adapter.Foreground().Client.Known && C.cthulhu_in_inactive_window(event.source) != 0
	if webNotification == nil && !progressUpdate && !adapter.Foreground().Client.Known && eventType != WindowCreateEvent && eventType != WindowActivatedEvent &&
		eventType != WindowDeactivatedEvent && eventType != WindowDestroyedEvent && eventType != AnnouncementEvent && !snapshot.AutocompletePopup &&
		C.cthulhu_in_inactive_window(event.source) != 0 {
		if ownedTarget {
			C.g_object_unref(C.gpointer(target))
		}
		return
	}
	var chromeFocus ObjectID
	if isDocumentLifecycleEvent(eventType) || eventType == BusyStateEvent {
		chromeFocus = adapter.focusedChrome(snapshot.ID())
	}

	focusEvent := NewEventWithPayload(
		eventType,
		snapshot,
		payload,
	)
	if eventType != nativeEventType {
		focusEvent.NativeType = nativeEventType
	}
	focusEvent.Detail1 = int(C.cthulhu_event_detail1(event))
	focusEvent.WebNotification = webNotification
	focusEvent.PopupFor = popupFor
	adapter.enrichNativeWindowEvent(event, target, eventType, snapshot, &focusEvent)
	if inactiveProgress {
		focusEvent.ForegroundMismatch = true
	}
	if !focusEvent.Window.Valid() && (eventType == WindowActivatedEvent || eventType == WindowDeactivatedEvent || eventType == WindowDestroyedEvent) {
		focusEvent.Window = originID
	}
	if !focusEvent.ForegroundMismatch && !snapshot.Defunct && snapshot.Role != "invalid" {
		if shouldRetainNativeFocus(eventType, focusEvent.Detail1, chromeFocus) && !snapshot.ReadOnlyCombo.Valid() &&
			!(eventType == SelectionChangedEvent && focusEvent.Source.LibreOffice != nil && focusEvent.Source.LibreOffice.InSpreadsheet) {
			adapter.rememberNativeFocus(target, snapshot.ID())
		}
	}
	focusEvent.FocusOutsideDocument = chromeFocus
	if eventType == DocumentLoadCompleteEvent {
		uri := C.cthulhu_document_uri(event.source)
		if uri != nil {
			if parsed, err := url.Parse(C.GoString(uri)); err == nil {
				focusEvent.DocumentFragment = sanitizeSnapshotField(parsed.Fragment)
			}
			C.g_free(C.gpointer(uri))
		}
	}
	focusEvent.SnapshotDuration = time.Since(snapshotStarted)
	bit := documentNavigationEchoBit(focusEvent, adapter.navigationCaretOffset, adapter.navigationSelectionOffsets)
	if adapter.navigationEcho[snapshot.ID()]&bit != 0 {
		focusEvent.NavigationEcho = true
		adapter.navigationEcho[snapshot.ID()] &^= bit
	} else if eventType == CaretEvent || eventType == FocusEvent || eventType == FocusedStateEvent {
		clear(adapter.navigationEcho)
	}
	focusEvent.OriginPath = sanitizeSnapshotField(C.GoString(C.cthulhu_accessible_path(event.source)))
	if eventType == ActiveDescendantEvent && inlineMenuID.Valid() {
		focusEvent.OriginPath = inlineMenuID.Path
	}
	if ownedTarget {
		C.g_object_unref(C.gpointer(target))
	}

	adapter.enqueueSecureEvent(focusEvent, secureEpoch)
}