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

// Package ocrconfirm runs only in the short-lived confirmation helper.
package ocrconfirm

/*
#cgo pkg-config: gtk+-3.0
#include <stdlib.h>
int cthulhu_ocr_confirm(const char *word);
*/
import "C"

import (
	"bytes"
	"io"
	"unicode/utf8"
	"unsafe"
)

func Run(input io.Reader, output io.Writer) error {
	data, err := io.ReadAll(io.LimitReader(input, 4097))
	if err != nil || len(data) == 0 || len(data) > 4096 || !utf8.Valid(data) || bytes.IndexByte(data, 0) >= 0 {
		return io.ErrUnexpectedEOF
	}
	word := C.CString(string(data))
	defer C.free(unsafe.Pointer(word))
	if C.cthulhu_ocr_confirm(word) == 1 {
		_, err = io.WriteString(output, "yes\n")
	} else {
		_, err = io.WriteString(output, "cancel\n")
	}
	return err
}