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

package app

import (
	"time"

	"git.stormux.org/storm/cthulhu/internal/atspi"
	"git.stormux.org/storm/cthulhu/internal/input"
)

func (handler *accessibilityEventHandler) handleSelectionAndClipboard(event atspi.Event, activity input.Activity, intent input.Intent) bool {
	state := handler.state
	logger := handler.logger
	speech := handler.speech
	if activity.Clipboard == input.PasteAction && activity.Sequence == state.lastPasteSequence &&
		event.Source.ID() == state.lastPasteID && time.Since(state.lastPasteAt) < time.Second &&
		(event.Type == atspi.TextInsertedEvent || event.Type == atspi.TextDeletedEvent ||
			event.Type == atspi.TextSelectionChangedEvent || event.Type == atspi.CaretEvent) {
		if event.Type == atspi.CaretEvent {
			state.suppressNextCaretPath = ""
		} else if event.Type == atspi.TextSelectionChangedEvent {
			state.selection.changed(event.Source)
		}
		logger.Debug("skipped text event following paste confirmation", "type", event.Type)
		return true
	}
	if event.Type == atspi.TextSelectionChangedEvent {
		if event.Source.ID() != state.focusedID || !event.Source.Editable || event.Source.ReadOnly ||
			event.Source.Role == "password text" || event.Source.Autocomplete {
			return true
		}
		fragmentLimit := selectionFragmentLimit
		if activity.Selecting && intent == input.LineIntent {
			fragmentLimit = lineSelectionFragmentLimit
		}
		message := state.selection.changedWithLimit(event.Source, fragmentLimit)
		if message != "" {
			state.pending.caret.clear()
			state.selectionCaretID = event.Source.ID()
			state.selectionCaretSequence = activity.Sequence
			state.selectionCaretAt = time.Now()
			if activity.Clipboard != input.CutAction && activity.Clipboard != input.PasteAction {
				speech.Enqueue(speechRequest{Text: message, Role: "system", Cause: event.Type})
			}
		}
		return true
	}
	if activity.Sequence != 0 && activity.Sequence != state.lastClipboardSequence &&
		event.Source.ID() == state.focusedID && event.Source.Editable && !event.Source.ReadOnly &&
		!event.Source.Autocomplete && event.Source.Role != "password text" {
		message := ""
		if event.Type == atspi.TextDeletedEvent && activity.Clipboard == input.CutAction {
			message = "cut"
		} else if event.Type == atspi.TextInsertedEvent && activity.Clipboard == input.PasteAction {
			message = "pasted from clipboard"
		}
		if message != "" {
			state.lastClipboardSequence = activity.Sequence
			if activity.Clipboard == input.PasteAction {
				state.lastPasteSequence = activity.Sequence
				state.lastPasteID = event.Source.ID()
				state.lastPasteAt = time.Now()
				state.pending.caret.clear()
			}
			speech.Enqueue(speechRequest{Text: message, Role: "system", Cause: "clipboard"})
			return true
		}
	}
	return false
}