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

package atspi

import (
	"strings"
	"unicode/utf8"
)

// LibreOfficeContext is bounded, copied metadata from the native owner. It
// describes Calc's cell and temporary editor objects, without native handles.
// Presentation and application policy must not query the provider themselves.
type LibreOfficeContext struct {
	InSpreadsheet    bool
	Cell             bool
	CellEditor       bool
	EditorParent     ObjectID
	ContainerFocused bool
	CellText         string
	Coordinates      string
	Formula          string
	Selection        *LibreOfficeSelection
}

// LibreOfficeSelection never expands a sheet. Complete small selections carry
// at most 64 positions; larger selections carry counts and boundary samples.
// Kind is cells, rows, columns, or all. Count is a lower bound when
// CountLimited is true.
type LibreOfficeSelection struct {
	Kind         string
	Count        int
	CountLimited bool
	Complete     bool
	Cells        []LibreOfficeCell
	// Boundary samples distinguish equal-sized large selections. They do
	// not prove that every cell between the endpoints is selected.
	First, Last LibreOfficeCell
}

type LibreOfficeCell struct{ Row, Column int }

const libreOfficeSelectionLimit = 64

// IsLibreOfficeProcess uses /proc identity verified by the adapter. An
// accessible name or document title must never enable application policy.
func IsLibreOfficeProcess(process string) bool {
	return process == "soffice.bin"
}

// Preserve spaces inside formula string literals and keep the beginning when
// bounding long expressions. Text context's default suffix is for caret lines.
func sanitizeLibreOfficeFormula(value string) string {
	value = strings.ToValidUTF8(value, "�")
	if len(value) > maxSnapshotFieldLength {
		value = value[:maxSnapshotFieldLength]
		for !utf8.ValidString(value) {
			value = value[:len(value)-1]
		}
	}
	return sanitizeTextContext(value)
}