/**
 * AlaskahQR - Barcode Generator
 */

const BCState = {
  data: '1234567890128',
  format: 'CODE128',
  productName: '',
  displayValue: true,
  fgColor: '#000000',
  bgColor: '#ffffff',
  titleColor: '#000000',
  titleSize: 16,
  titleWeight: 'normal',
  barWidth: 2,
  barHeight: 100,
  margin: 10,
  fontSize: 16,
  downloadScale: 1,
};

const BC_UI_I18N = {
  ko: {
    uiOptions: '⚙️ 옵션 설정',
    uiTabInput: '내용',
    uiTabStyle: '스타일',
    uiTabSize: '크기',
    uiFormatLabel: '바코드 형식',
    uiDataLabel: '바코드 데이터',
    uiDataPlaceholder: '바코드에 담을 숫자 또는 텍스트',
    uiProductLabel: '제품명',
    uiProductSmall: '바코드 위에 표시됩니다',
    uiProductPlaceholder: '예: 홍길동 과자 300g',
    uiProductHelp: '비워두면 제품명이 표시되지 않습니다',
    uiDisplayValue: '하단 숫자 표시',
    uiShow: '표시',
    uiHide: '숨김',
    uiBarColorLabel: '바 색상 (전경색)',
    uiBarColorHelp: '바코드 색상',
    uiBgColorLabel: '배경색',
    uiBgColorHelp: '배경 색상',
    uiTitleColorLabel: '제품명 색상',
    uiTitleColorHelp: '제품명 텍스트 색상',
    uiTitleSizeLabel: '제품명 글꼴 크기',
    uiTitleWeightLabel: '제품명 글꼴 두께',
    uiWeightNormal: '보통',
    uiWeightBold: '굵게',
    uiWeightBolder: '아주 굵게',
    uiPresetLabel: '색상 프리셋',
    uiPresetClassic: '클래식',
    uiPresetBlue: '블루',
    uiPresetGreen: '그린',
    uiPresetBrown: '브라운',
    uiPresetDark: '다크',
    uiBarWidthLabel: '바 너비',
    uiBarHeightLabel: '바코드 높이',
    uiMarginLabel: '여백 (margin)',
    uiFontSizeLabel: '하단 숫자 크기',
    uiPreview: '👁️ 미리보기',
    uiDownloadScale: '다운로드 배율',
    uiDownloadPng: '⬇️ PNG 다운로드',
    uiDownloadSvg: '📄 SVG 다운로드',
    uiInfoEmpty: '내용을 입력하면 바코드가 자동으로 생성됩니다',
    uiAd: '광고 영역 (AdSense)',
    uiGuideTitle: '바코드 형식 안내',
    uiGuide1Desc: '가장 범용적인 형식. 영문, 숫자, 특수문자를 모두 지원하며 길이 제한이 없습니다.',
    uiGuide2Desc: '국제 표준 소매 상품 코드. 마트, 편의점 등 소매점 상품에 주로 사용됩니다 (13자리).',
    uiGuide3Desc: '미국/캐나다 소매 상품 코드. 북미 시장 진출 시 필요한 12자리 바코드입니다.',
    uiGuide4Desc: '물류 박스용 바코드. 여러 개의 소매 상품을 묶은 포장 단위에 사용됩니다.',
    uiFmtCode128: 'CODE128 - 범용 (영문/숫자)',
    uiFmtCode39: 'CODE39 - 산업용',
    uiFmtEan13: 'EAN-13 - 소매 상품 (13자리)',
    uiFmtEan8: 'EAN-8 - 소매 상품 소형 (8자리)',
    uiFmtUpc: 'UPC-A - 미국 소매 (12자리)',
    uiFmtItf14: 'ITF-14 - 물류/박스',
    uiFmtMsi: 'MSI - 재고 관리',
    hints: {
      CODE128: 'CODE128: 영문 대소문자, 숫자, 특수문자 자유롭게 사용 가능',
      CODE39: 'CODE39: 대문자 영문(A-Z), 숫자(0-9), 일부 특수문자(-. *$/+%)',
      EAN13: 'EAN-13: 숫자 13자리만 입력 (마지막 자리는 체크섬 자동 계산)',
      EAN8: 'EAN-8: 숫자 8자리만 입력',
      UPC: 'UPC-A: 숫자 12자리만 입력',
      ITF14: 'ITF-14: 숫자 14자리 (짝수 개수)',
      MSI: 'MSI: 숫자만 입력 가능',
    },
    errEan13: 'EAN-13은 숫자 12자리(체크섬 자동) 또는 13자리만 가능합니다.',
    errEan8: 'EAN-8은 숫자 7자리(체크섬 자동) 또는 8자리만 가능합니다.',
    errUpc: 'UPC-A는 숫자 11자리(체크섬 자동) 또는 12자리만 가능합니다.',
    errItf14: 'ITF-14는 숫자 14자리(또는 13자리+체크섬)만 가능합니다.',
    errMsi: 'MSI는 숫자만 입력 가능합니다.',
    emptyData: '바코드 데이터를 입력해주세요',
    invalidDataPrefix: '유효하지 않은 데이터입니다: ',
    invalidDataFallback: '형식을 확인해주세요',
    renderFailed: '생성 실패',
    infoFormat: '형식',
    infoData: '데이터',
    alertGenerateFirst: '먼저 바코드를 생성해주세요',
    uiSupportTitle: '생성이 잘 되었다면 후원으로 응원해주세요',
    uiSupportDesc: '무료 운영과 기능 개선에 도움이 됩니다. 카카오페이와 토스로 후원할 수 있습니다.',
    uiSupportButton: '☕ 후원하기',
  },
  en: {
    uiOptions: '⚙️ Options',
    uiTabInput: 'Content',
    uiTabStyle: 'Style',
    uiTabSize: 'Size',
    uiFormatLabel: 'Barcode Format',
    uiDataLabel: 'Barcode Data',
    uiDataPlaceholder: 'Enter numbers or text for the barcode',
    uiProductLabel: 'Product Name',
    uiProductSmall: 'Displayed above the barcode',
    uiProductPlaceholder: 'e.g. Chocolate Snack 300g',
    uiProductHelp: 'If left blank, no product name is displayed',
    uiDisplayValue: 'Show Numbers Below',
    uiShow: 'Show',
    uiHide: 'Hide',
    uiBarColorLabel: 'Bar Color (Foreground)',
    uiBarColorHelp: 'Barcode color',
    uiBgColorLabel: 'Background Color',
    uiBgColorHelp: 'Background color',
    uiTitleColorLabel: 'Product Name Color',
    uiTitleColorHelp: 'Product name text color',
    uiTitleSizeLabel: 'Product Name Font Size',
    uiTitleWeightLabel: 'Product Name Font Weight',
    uiWeightNormal: 'Normal',
    uiWeightBold: 'Bold',
    uiWeightBolder: 'Extra Bold',
    uiPresetLabel: 'Color Presets',
    uiPresetClassic: 'Classic',
    uiPresetBlue: 'Blue',
    uiPresetGreen: 'Green',
    uiPresetBrown: 'Brown',
    uiPresetDark: 'Dark',
    uiBarWidthLabel: 'Bar Width',
    uiBarHeightLabel: 'Barcode Height',
    uiMarginLabel: 'Margin',
    uiFontSizeLabel: 'Number Font Size',
    uiPreview: '👁️ Preview',
    uiDownloadScale: 'Download Scale',
    uiDownloadPng: '⬇️ Download PNG',
    uiDownloadSvg: '📄 Download SVG',
    uiInfoEmpty: 'Enter content to generate your barcode automatically',
    uiAd: 'Ad Area (AdSense)',
    uiGuideTitle: 'Barcode Format Guide',
    uiGuide1Desc: 'Most versatile format. Supports letters, numbers, and symbols with no practical length limit.',
    uiGuide2Desc: 'International retail standard. Commonly used for products in supermarkets and convenience stores (13 digits).',
    uiGuide3Desc: 'Retail code used in the US and Canada. Required 12-digit barcode for North American markets.',
    uiGuide4Desc: 'Used for logistics boxes. Applied to grouped shipping units containing multiple retail items.',
    uiFmtCode128: 'CODE128 - General (Text/Numbers)',
    uiFmtCode39: 'CODE39 - Industrial',
    uiFmtEan13: 'EAN-13 - Retail Product (13 digits)',
    uiFmtEan8: 'EAN-8 - Small Retail Product (8 digits)',
    uiFmtUpc: 'UPC-A - US Retail (12 digits)',
    uiFmtItf14: 'ITF-14 - Logistics/Box',
    uiFmtMsi: 'MSI - Inventory',
    hints: {
      CODE128: 'CODE128: letters, numbers, and symbols are supported',
      CODE39: 'CODE39: uppercase A-Z, digits 0-9, and limited symbols (-. *$/+%)',
      EAN13: 'EAN-13: enter 13 digits (last digit auto-checksummed)',
      EAN8: 'EAN-8: enter 8 digits',
      UPC: 'UPC-A: enter 12 digits',
      ITF14: 'ITF-14: 14 digits (even count)',
      MSI: 'MSI: digits only',
    },
    errEan13: 'EAN-13 requires 12 digits (auto checksum) or 13 digits.',
    errEan8: 'EAN-8 requires 7 digits (auto checksum) or 8 digits.',
    errUpc: 'UPC-A requires 11 digits (auto checksum) or 12 digits.',
    errItf14: 'ITF-14 requires 14 digits (or 13 digits + checksum).',
    errMsi: 'MSI accepts digits only.',
    emptyData: 'Please enter barcode data',
    invalidDataPrefix: 'Invalid data: ',
    invalidDataFallback: 'Please check the format',
    renderFailed: 'Generation failed',
    infoFormat: 'Format',
    infoData: 'Data',
    alertGenerateFirst: 'Generate a barcode first',
    uiSupportTitle: 'If this worked well, consider supporting the project',
    uiSupportDesc: 'Your support helps keep the generator free and improves the service. Donations are available via KakaoPay or Toss.',
    uiSupportButton: '☕ Support',
  },
  ja: {
    uiOptions: '⚙️ オプション',
    uiTabInput: '内容',
    uiTabStyle: 'スタイル',
    uiTabSize: 'サイズ',
    uiFormatLabel: 'バーコード形式',
    uiDataLabel: 'バーコードデータ',
    uiDataPlaceholder: 'バーコードに入れる数字またはテキスト',
    uiProductLabel: '商品名',
    uiProductSmall: 'バーコード上に表示されます',
    uiProductPlaceholder: '例: チョコスナック 300g',
    uiProductHelp: '空欄の場合、商品名は表示されません',
    uiDisplayValue: '下部の数字表示',
    uiShow: '表示',
    uiHide: '非表示',
    uiBarColorLabel: 'バーの色 (前景色)',
    uiBarColorHelp: 'バーコード色',
    uiBgColorLabel: '背景色',
    uiBgColorHelp: '背景色',
    uiTitleColorLabel: '商品名の色',
    uiTitleColorHelp: '商品名テキスト色',
    uiTitleSizeLabel: '商品名フォントサイズ',
    uiTitleWeightLabel: '商品名フォントの太さ',
    uiWeightNormal: '標準',
    uiWeightBold: '太字',
    uiWeightBolder: '極太',
    uiPresetLabel: 'カラープリセット',
    uiPresetClassic: 'クラシック',
    uiPresetBlue: 'ブルー',
    uiPresetGreen: 'グリーン',
    uiPresetBrown: 'ブラウン',
    uiPresetDark: 'ダーク',
    uiBarWidthLabel: 'バー幅',
    uiBarHeightLabel: 'バーコード高さ',
    uiMarginLabel: '余白 (margin)',
    uiFontSizeLabel: '下部数字サイズ',
    uiPreview: '👁️ プレビュー',
    uiDownloadScale: 'ダウンロード倍率',
    uiDownloadPng: '⬇️ PNGをダウンロード',
    uiDownloadSvg: '📄 SVGをダウンロード',
    uiInfoEmpty: '内容を入力するとバーコードが自動生成されます',
    uiAd: '広告エリア (AdSense)',
    uiGuideTitle: 'バーコード形式ガイド',
    uiGuide1Desc: '最も汎用的な形式。英字・数字・記号に対応し、実用上の長さ制限がほぼありません。',
    uiGuide2Desc: '国際標準の小売商品コード。スーパーやコンビニの商品に広く使われます (13桁)。',
    uiGuide3Desc: '米国/カナダの小売商品コード。北米市場向けに必要な12桁バーコードです。',
    uiGuide4Desc: '物流箱向けバーコード。複数の小売商品をまとめた梱包単位に使用されます。',
    uiFmtCode128: 'CODE128 - 汎用 (英字/数字)',
    uiFmtCode39: 'CODE39 - 産業用',
    uiFmtEan13: 'EAN-13 - 小売商品 (13桁)',
    uiFmtEan8: 'EAN-8 - 小型小売商品 (8桁)',
    uiFmtUpc: 'UPC-A - 米国小売 (12桁)',
    uiFmtItf14: 'ITF-14 - 物流/箱',
    uiFmtMsi: 'MSI - 在庫管理',
    hints: {
      CODE128: 'CODE128: 英数字と記号を使用できます',
      CODE39: 'CODE39: 英大文字(A-Z)、数字(0-9)、一部記号(-. *$/+%)',
      EAN13: 'EAN-13: 13桁の数字を入力（末尾チェックサムは自動計算）',
      EAN8: 'EAN-8: 8桁の数字を入力',
      UPC: 'UPC-A: 12桁の数字を入力',
      ITF14: 'ITF-14: 14桁の数字（偶数桁）',
      MSI: 'MSI: 数字のみ入力可能',
    },
    errEan13: 'EAN-13は12桁（チェックサム自動）または13桁の数字のみ対応です。',
    errEan8: 'EAN-8は7桁（チェックサム自動）または8桁の数字のみ対応です。',
    errUpc: 'UPC-Aは11桁（チェックサム自動）または12桁の数字のみ対応です。',
    errItf14: 'ITF-14は14桁（または13桁+チェックサム）の数字のみ対応です。',
    errMsi: 'MSIは数字のみ入力できます。',
    emptyData: 'バーコードデータを入力してください',
    invalidDataPrefix: '無効なデータです: ',
    invalidDataFallback: '形式を確認してください',
    renderFailed: '生成に失敗しました',
    infoFormat: '形式',
    infoData: 'データ',
    alertGenerateFirst: '先にバーコードを生成してください',
  },
  zh: {
    uiOptions: '⚙️ 选项',
    uiTabInput: '内容',
    uiTabStyle: '样式',
    uiTabSize: '大小',
    uiFormatLabel: '条码格式',
    uiDataLabel: '条码数据',
    uiDataPlaceholder: '输入条码数字或文本',
    uiProductLabel: '产品名称',
    uiProductSmall: '显示在条码上方',
    uiProductPlaceholder: '例如: 巧克力饼干 300g',
    uiProductHelp: '留空时不显示产品名称',
    uiDisplayValue: '显示底部数字',
    uiShow: '显示',
    uiHide: '隐藏',
    uiBarColorLabel: '条纹颜色 (前景色)',
    uiBarColorHelp: '条码颜色',
    uiBgColorLabel: '背景色',
    uiBgColorHelp: '背景颜色',
    uiTitleColorLabel: '产品名称颜色',
    uiTitleColorHelp: '产品名称文字颜色',
    uiTitleSizeLabel: '产品名称字体大小',
    uiTitleWeightLabel: '产品名称字重',
    uiWeightNormal: '常规',
    uiWeightBold: '加粗',
    uiWeightBolder: '特粗',
    uiPresetLabel: '颜色预设',
    uiPresetClassic: '经典',
    uiPresetBlue: '蓝色',
    uiPresetGreen: '绿色',
    uiPresetBrown: '棕色',
    uiPresetDark: '深色',
    uiBarWidthLabel: '条宽',
    uiBarHeightLabel: '条码高度',
    uiMarginLabel: '边距 (margin)',
    uiFontSizeLabel: '底部数字大小',
    uiPreview: '👁️ 预览',
    uiDownloadScale: '下载倍率',
    uiDownloadPng: '⬇️ 下载 PNG',
    uiDownloadSvg: '📄 下载 SVG',
    uiInfoEmpty: '输入内容后将自动生成条码',
    uiAd: '广告区域 (AdSense)',
    uiGuideTitle: '条码格式说明',
    uiGuide1Desc: '最通用的格式。支持字母、数字和符号，长度限制很宽松。',
    uiGuide2Desc: '国际零售标准。常用于商超与便利店商品 (13位)。',
    uiGuide3Desc: '美国/加拿大零售商品编码。进入北美市场常用的12位条码。',
    uiGuide4Desc: '用于物流外箱。适合多个零售商品合并包装的运输单元。',
    uiFmtCode128: 'CODE128 - 通用 (字母/数字)',
    uiFmtCode39: 'CODE39 - 工业用',
    uiFmtEan13: 'EAN-13 - 零售商品 (13位)',
    uiFmtEan8: 'EAN-8 - 小型零售商品 (8位)',
    uiFmtUpc: 'UPC-A - 美国零售 (12位)',
    uiFmtItf14: 'ITF-14 - 物流/箱装',
    uiFmtMsi: 'MSI - 库存管理',
    hints: {
      CODE128: 'CODE128: 支持字母、数字和符号',
      CODE39: 'CODE39: 支持大写字母(A-Z)、数字(0-9)及部分符号(-. *$/+%)',
      EAN13: 'EAN-13: 输入13位数字（最后一位校验码自动计算）',
      EAN8: 'EAN-8: 输入8位数字',
      UPC: 'UPC-A: 输入12位数字',
      ITF14: 'ITF-14: 输入14位数字（偶数位）',
      MSI: 'MSI: 仅支持数字',
    },
    errEan13: 'EAN-13仅支持12位（自动校验）或13位数字。',
    errEan8: 'EAN-8仅支持7位（自动校验）或8位数字。',
    errUpc: 'UPC-A仅支持11位（自动校验）或12位数字。',
    errItf14: 'ITF-14仅支持14位（或13位+校验位）数字。',
    errMsi: 'MSI仅支持数字。',
    emptyData: '请输入条码数据',
    invalidDataPrefix: '无效数据: ',
    invalidDataFallback: '请检查格式',
    renderFailed: '生成失败',
    infoFormat: '格式',
    infoData: '数据',
    alertGenerateFirst: '请先生成条码',
  },
  es: {
    uiOptions: '⚙️ Opciones',
    uiTabInput: 'Contenido',
    uiTabStyle: 'Estilo',
    uiTabSize: 'Tamano',
    uiFormatLabel: 'Formato de codigo de barras',
    uiDataLabel: 'Datos del codigo de barras',
    uiDataPlaceholder: 'Ingresa numeros o texto para el codigo de barras',
    uiProductLabel: 'Nombre del producto',
    uiProductSmall: 'Se muestra sobre el codigo de barras',
    uiProductPlaceholder: 'Ej: Galletas de chocolate 300g',
    uiProductHelp: 'Si esta vacio, no se muestra el nombre del producto',
    uiDisplayValue: 'Mostrar numeros inferiores',
    uiShow: 'Mostrar',
    uiHide: 'Ocultar',
    uiBarColorLabel: 'Color de barras (primer plano)',
    uiBarColorHelp: 'Color del codigo de barras',
    uiBgColorLabel: 'Color de fondo',
    uiBgColorHelp: 'Color de fondo',
    uiTitleColorLabel: 'Color del nombre del producto',
    uiTitleColorHelp: 'Color del texto del producto',
    uiTitleSizeLabel: 'Tamano de fuente del producto',
    uiTitleWeightLabel: 'Grosor de fuente del producto',
    uiWeightNormal: 'Normal',
    uiWeightBold: 'Negrita',
    uiWeightBolder: 'Muy negrita',
    uiPresetLabel: 'Preajustes de color',
    uiPresetClassic: 'Clasico',
    uiPresetBlue: 'Azul',
    uiPresetGreen: 'Verde',
    uiPresetBrown: 'Marron',
    uiPresetDark: 'Oscuro',
    uiBarWidthLabel: 'Ancho de barra',
    uiBarHeightLabel: 'Altura del codigo',
    uiMarginLabel: 'Margen',
    uiFontSizeLabel: 'Tamano de numeros inferiores',
    uiPreview: '👁️ Vista previa',
    uiDownloadScale: 'Escala de descarga',
    uiDownloadPng: '⬇️ Descargar PNG',
    uiDownloadSvg: '📄 Descargar SVG',
    uiInfoEmpty: 'Ingresa contenido para generar el codigo automaticamente',
    uiAd: 'Area de anuncios (AdSense)',
    uiGuideTitle: 'Guia de formatos de codigo',
    uiGuide1Desc: 'Formato mas versatil. Soporta letras, numeros y simbolos sin limite practico de longitud.',
    uiGuide2Desc: 'Estandar internacional de retail. Usado en supermercados y tiendas (13 digitos).',
    uiGuide3Desc: 'Codigo retail de EE. UU./Canada. Requerido para mercado norteamericano (12 digitos).',
    uiGuide4Desc: 'Para cajas logisticas. Se usa en unidades de envio con multiples productos.',
    uiFmtCode128: 'CODE128 - General (texto/numeros)',
    uiFmtCode39: 'CODE39 - Industrial',
    uiFmtEan13: 'EAN-13 - Producto retail (13 digitos)',
    uiFmtEan8: 'EAN-8 - Producto retail pequeno (8 digitos)',
    uiFmtUpc: 'UPC-A - Retail EE. UU. (12 digitos)',
    uiFmtItf14: 'ITF-14 - Logistica/Caja',
    uiFmtMsi: 'MSI - Inventario',
    hints: {
      CODE128: 'CODE128: admite letras, numeros y simbolos',
      CODE39: 'CODE39: letras mayusculas (A-Z), numeros (0-9) y algunos simbolos (-. *$/+%)',
      EAN13: 'EAN-13: ingresa 13 digitos (el checksum final se calcula automaticamente)',
      EAN8: 'EAN-8: ingresa 8 digitos',
      UPC: 'UPC-A: ingresa 12 digitos',
      ITF14: 'ITF-14: 14 digitos (cantidad par)',
      MSI: 'MSI: solo numeros',
    },
    errEan13: 'EAN-13 requiere 12 digitos (checksum automatico) o 13 digitos.',
    errEan8: 'EAN-8 requiere 7 digitos (checksum automatico) o 8 digitos.',
    errUpc: 'UPC-A requiere 11 digitos (checksum automatico) o 12 digitos.',
    errItf14: 'ITF-14 requiere 14 digitos (o 13 digitos + checksum).',
    errMsi: 'MSI solo acepta numeros.',
    emptyData: 'Ingresa los datos del codigo de barras',
    invalidDataPrefix: 'Datos no validos: ',
    invalidDataFallback: 'Revisa el formato',
    renderFailed: 'Error de generacion',
    infoFormat: 'Formato',
    infoData: 'Datos',
    alertGenerateFirst: 'Primero genera un codigo de barras',
  },
  fr: {
    uiOptions: '⚙️ Options',
    uiTabInput: 'Contenu',
    uiTabStyle: 'Style',
    uiTabSize: 'Taille',
    uiFormatLabel: 'Format de code-barres',
    uiDataLabel: 'Donnees du code-barres',
    uiDataPlaceholder: 'Saisissez des chiffres ou du texte pour le code-barres',
    uiProductLabel: 'Nom du produit',
    uiProductSmall: 'Affiche au-dessus du code-barres',
    uiProductPlaceholder: 'Ex: Biscuits chocolat 300g',
    uiProductHelp: 'Si vide, le nom du produit n est pas affiche',
    uiDisplayValue: 'Afficher les chiffres en bas',
    uiShow: 'Afficher',
    uiHide: 'Masquer',
    uiBarColorLabel: 'Couleur des barres (premier plan)',
    uiBarColorHelp: 'Couleur du code-barres',
    uiBgColorLabel: 'Couleur d arriere-plan',
    uiBgColorHelp: 'Couleur de fond',
    uiTitleColorLabel: 'Couleur du nom du produit',
    uiTitleColorHelp: 'Couleur du texte produit',
    uiTitleSizeLabel: 'Taille de police du produit',
    uiTitleWeightLabel: 'Epaisseur de police du produit',
    uiWeightNormal: 'Normal',
    uiWeightBold: 'Gras',
    uiWeightBolder: 'Tres gras',
    uiPresetLabel: 'Preselections de couleur',
    uiPresetClassic: 'Classique',
    uiPresetBlue: 'Bleu',
    uiPresetGreen: 'Vert',
    uiPresetBrown: 'Marron',
    uiPresetDark: 'Sombre',
    uiBarWidthLabel: 'Largeur des barres',
    uiBarHeightLabel: 'Hauteur du code-barres',
    uiMarginLabel: 'Marge',
    uiFontSizeLabel: 'Taille des chiffres du bas',
    uiPreview: '👁️ Apercu',
    uiDownloadScale: 'Echelle de telechargement',
    uiDownloadPng: '⬇️ Telecharger PNG',
    uiDownloadSvg: '📄 Telecharger SVG',
    uiInfoEmpty: 'Saisissez du contenu pour generer automatiquement le code-barres',
    uiAd: 'Zone publicitaire (AdSense)',
    uiGuideTitle: 'Guide des formats de code-barres',
    uiGuide1Desc: 'Format le plus polyvalent. Prend en charge lettres, chiffres et symboles sans limite pratique de longueur.',
    uiGuide2Desc: 'Standard international du retail. Utilise pour les produits en magasin (13 chiffres).',
    uiGuide3Desc: 'Code retail des Etats-Unis/Canada. Necessaire pour le marche nord-americain (12 chiffres).',
    uiGuide4Desc: 'Pour les cartons logistiques. Utilise pour les unites d expedition regroupant plusieurs produits.',
    uiFmtCode128: 'CODE128 - General (texte/chiffres)',
    uiFmtCode39: 'CODE39 - Industriel',
    uiFmtEan13: 'EAN-13 - Produit retail (13 chiffres)',
    uiFmtEan8: 'EAN-8 - Petit produit retail (8 chiffres)',
    uiFmtUpc: 'UPC-A - Retail US (12 chiffres)',
    uiFmtItf14: 'ITF-14 - Logistique/Carton',
    uiFmtMsi: 'MSI - Inventaire',
    hints: {
      CODE128: 'CODE128 : lettres, chiffres et symboles pris en charge',
      CODE39: 'CODE39 : lettres majuscules (A-Z), chiffres (0-9) et symboles limites (-. *$/+%)',
      EAN13: 'EAN-13 : saisir 13 chiffres (checksum final calcule automatiquement)',
      EAN8: 'EAN-8 : saisir 8 chiffres',
      UPC: 'UPC-A : saisir 12 chiffres',
      ITF14: 'ITF-14 : 14 chiffres (nombre pair)',
      MSI: 'MSI : chiffres uniquement',
    },
    errEan13: 'EAN-13 exige 12 chiffres (checksum auto) ou 13 chiffres.',
    errEan8: 'EAN-8 exige 7 chiffres (checksum auto) ou 8 chiffres.',
    errUpc: 'UPC-A exige 11 chiffres (checksum auto) ou 12 chiffres.',
    errItf14: 'ITF-14 exige 14 chiffres (ou 13 chiffres + checksum).',
    errMsi: 'MSI accepte uniquement les chiffres.',
    emptyData: 'Veuillez saisir les donnees du code-barres',
    invalidDataPrefix: 'Donnees invalides : ',
    invalidDataFallback: 'Veuillez verifier le format',
    renderFailed: 'Echec de generation',
    infoFormat: 'Format',
    infoData: 'Donnees',
    alertGenerateFirst: 'Generez d abord un code-barres',
  },
  pt: {
    uiOptions: '⚙️ Opcoes',
    uiTabInput: 'Conteudo',
    uiTabStyle: 'Estilo',
    uiTabSize: 'Tamanho',
    uiFormatLabel: 'Formato do codigo de barras',
    uiDataLabel: 'Dados do codigo de barras',
    uiDataPlaceholder: 'Digite numeros ou texto para o codigo de barras',
    uiProductLabel: 'Nome do produto',
    uiProductSmall: 'Exibido acima do codigo de barras',
    uiProductPlaceholder: 'Ex: Biscoito de chocolate 300g',
    uiProductHelp: 'Se ficar vazio, o nome do produto nao sera exibido',
    uiDisplayValue: 'Mostrar numeros abaixo',
    uiShow: 'Mostrar',
    uiHide: 'Ocultar',
    uiBarColorLabel: 'Cor das barras (primeiro plano)',
    uiBarColorHelp: 'Cor do codigo de barras',
    uiBgColorLabel: 'Cor de fundo',
    uiBgColorHelp: 'Cor de fundo',
    uiTitleColorLabel: 'Cor do nome do produto',
    uiTitleColorHelp: 'Cor do texto do produto',
    uiTitleSizeLabel: 'Tamanho da fonte do produto',
    uiTitleWeightLabel: 'Espessura da fonte do produto',
    uiWeightNormal: 'Normal',
    uiWeightBold: 'Negrito',
    uiWeightBolder: 'Extra negrito',
    uiPresetLabel: 'Predefinicoes de cor',
    uiPresetClassic: 'Classico',
    uiPresetBlue: 'Azul',
    uiPresetGreen: 'Verde',
    uiPresetBrown: 'Marrom',
    uiPresetDark: 'Escuro',
    uiBarWidthLabel: 'Largura das barras',
    uiBarHeightLabel: 'Altura do codigo de barras',
    uiMarginLabel: 'Margem',
    uiFontSizeLabel: 'Tamanho dos numeros inferiores',
    uiPreview: '👁️ Pre-visualizacao',
    uiDownloadScale: 'Escala de download',
    uiDownloadPng: '⬇️ Baixar PNG',
    uiDownloadSvg: '📄 Baixar SVG',
    uiInfoEmpty: 'Digite conteudo para gerar o codigo automaticamente',
    uiAd: 'Area de anuncios (AdSense)',
    uiGuideTitle: 'Guia de formatos de codigo de barras',
    uiGuide1Desc: 'Formato mais versatil. Suporta letras, numeros e simbolos sem limite pratico de tamanho.',
    uiGuide2Desc: 'Padrao internacional de varejo. Muito usado em supermercados e lojas (13 digitos).',
    uiGuide3Desc: 'Codigo de varejo dos EUA/Canada. Necessario para o mercado norte-americano (12 digitos).',
    uiGuide4Desc: 'Para caixas logisticas. Usado em unidades de envio com varios produtos.',
    uiFmtCode128: 'CODE128 - Geral (texto/numeros)',
    uiFmtCode39: 'CODE39 - Industrial',
    uiFmtEan13: 'EAN-13 - Produto de varejo (13 digitos)',
    uiFmtEan8: 'EAN-8 - Produto pequeno de varejo (8 digitos)',
    uiFmtUpc: 'UPC-A - Varejo EUA (12 digitos)',
    uiFmtItf14: 'ITF-14 - Logistica/Caixa',
    uiFmtMsi: 'MSI - Inventario',
    hints: {
      CODE128: 'CODE128: aceita letras, numeros e simbolos',
      CODE39: 'CODE39: letras maiusculas (A-Z), numeros (0-9) e alguns simbolos (-. *$/+%)',
      EAN13: 'EAN-13: informe 13 digitos (checksum final calculado automaticamente)',
      EAN8: 'EAN-8: informe 8 digitos',
      UPC: 'UPC-A: informe 12 digitos',
      ITF14: 'ITF-14: 14 digitos (quantidade par)',
      MSI: 'MSI: apenas numeros',
    },
    errEan13: 'EAN-13 exige 12 digitos (checksum automatico) ou 13 digitos.',
    errEan8: 'EAN-8 exige 7 digitos (checksum automatico) ou 8 digitos.',
    errUpc: 'UPC-A exige 11 digitos (checksum automatico) ou 12 digitos.',
    errItf14: 'ITF-14 exige 14 digitos (ou 13 digitos + checksum).',
    errMsi: 'MSI aceita apenas numeros.',
    emptyData: 'Digite os dados do codigo de barras',
    invalidDataPrefix: 'Dados invalidos: ',
    invalidDataFallback: 'Verifique o formato',
    renderFailed: 'Falha na geracao',
    infoFormat: 'Formato',
    infoData: 'Dados',
    alertGenerateFirst: 'Gere um codigo de barras primeiro',
  },
  vi: {
    uiOptions: '⚙️ Tuy chon',
    uiTabInput: 'Noi dung',
    uiTabStyle: 'Kieu',
    uiTabSize: 'Kich thuoc',
    uiFormatLabel: 'Dinh dang ma vach',
    uiDataLabel: 'Du lieu ma vach',
    uiDataPlaceholder: 'Nhap so hoac van ban cho ma vach',
    uiProductLabel: 'Ten san pham',
    uiProductSmall: 'Hien thi phia tren ma vach',
    uiProductPlaceholder: 'Vi du: Banh quy socola 300g',
    uiProductHelp: 'De trong thi ten san pham se khong hien thi',
    uiDisplayValue: 'Hien so ben duoi',
    uiShow: 'Hien',
    uiHide: 'An',
    uiBarColorLabel: 'Mau vach (tien canh)',
    uiBarColorHelp: 'Mau ma vach',
    uiBgColorLabel: 'Mau nen',
    uiBgColorHelp: 'Mau nen',
    uiTitleColorLabel: 'Mau ten san pham',
    uiTitleColorHelp: 'Mau chu ten san pham',
    uiTitleSizeLabel: 'Co chu ten san pham',
    uiTitleWeightLabel: 'Do dam chu ten san pham',
    uiWeightNormal: 'Thuong',
    uiWeightBold: 'Dam',
    uiWeightBolder: 'Rat dam',
    uiPresetLabel: 'Mau san co',
    uiPresetClassic: 'Co dien',
    uiPresetBlue: 'Xanh duong',
    uiPresetGreen: 'Xanh la',
    uiPresetBrown: 'Nau',
    uiPresetDark: 'Toi',
    uiBarWidthLabel: 'Do rong vach',
    uiBarHeightLabel: 'Chieu cao ma vach',
    uiMarginLabel: 'Le',
    uiFontSizeLabel: 'Co chu so ben duoi',
    uiPreview: '👁️ Xem truoc',
    uiDownloadScale: 'Ti le tai xuong',
    uiDownloadPng: '⬇️ Tai PNG',
    uiDownloadSvg: '📄 Tai SVG',
    uiInfoEmpty: 'Nhap noi dung de tu dong tao ma vach',
    uiAd: 'Khu vuc quang cao (AdSense)',
    uiGuideTitle: 'Huong dan dinh dang ma vach',
    uiGuide1Desc: 'Dinh dang da dung nhat. Ho tro chu cai, so va ky tu dac biet, gan nhu khong gioi han do dai.',
    uiGuide2Desc: 'Tieu chuan ban le quoc te. Thuong dung cho san pham tai sieu thi va cua hang (13 chu so).',
    uiGuide3Desc: 'Ma ban le My/Canada. Ma 12 chu so can thiet cho thi truong Bac My.',
    uiGuide4Desc: 'Danh cho thung logistics. Dung cho don vi van chuyen gom nhieu san pham.',
    uiFmtCode128: 'CODE128 - Tong quat (chu/so)',
    uiFmtCode39: 'CODE39 - Cong nghiep',
    uiFmtEan13: 'EAN-13 - San pham ban le (13 chu so)',
    uiFmtEan8: 'EAN-8 - San pham nho (8 chu so)',
    uiFmtUpc: 'UPC-A - Ban le My (12 chu so)',
    uiFmtItf14: 'ITF-14 - Logistics/Thung',
    uiFmtMsi: 'MSI - Ton kho',
    hints: {
      CODE128: 'CODE128: ho tro chu cai, so va ky tu dac biet',
      CODE39: 'CODE39: chu in hoa (A-Z), so (0-9) va mot so ky tu (-. *$/+%)',
      EAN13: 'EAN-13: nhap 13 chu so (so kiem tra cuoi tu dong tinh)',
      EAN8: 'EAN-8: nhap 8 chu so',
      UPC: 'UPC-A: nhap 12 chu so',
      ITF14: 'ITF-14: 14 chu so (so luong chan)',
      MSI: 'MSI: chi nhap so',
    },
    errEan13: 'EAN-13 yeu cau 12 chu so (tu dong checksum) hoac 13 chu so.',
    errEan8: 'EAN-8 yeu cau 7 chu so (tu dong checksum) hoac 8 chu so.',
    errUpc: 'UPC-A yeu cau 11 chu so (tu dong checksum) hoac 12 chu so.',
    errItf14: 'ITF-14 yeu cau 14 chu so (hoac 13 chu so + checksum).',
    errMsi: 'MSI chi cho phep chu so.',
    emptyData: 'Vui long nhap du lieu ma vach',
    invalidDataPrefix: 'Du lieu khong hop le: ',
    invalidDataFallback: 'Vui long kiem tra dinh dang',
    renderFailed: 'Tao that bai',
    infoFormat: 'Dinh dang',
    infoData: 'Du lieu',
    alertGenerateFirst: 'Hay tao ma vach truoc',
  },
  th: {
    uiOptions: '⚙️ ตัวเลือก',
    uiTabInput: 'เนื้อหา',
    uiTabStyle: 'สไตล์',
    uiTabSize: 'ขนาด',
    uiFormatLabel: 'รูปแบบบาร์โค้ด',
    uiDataLabel: 'ข้อมูลบาร์โค้ด',
    uiDataPlaceholder: 'ป้อนตัวเลขหรือข้อความสำหรับบาร์โค้ด',
    uiProductLabel: 'ชื่อสินค้า',
    uiProductSmall: 'แสดงเหนือบาร์โค้ด',
    uiProductPlaceholder: 'เช่น คุกกี้ช็อกโกแลต 300g',
    uiProductHelp: 'หากเว้นว่าง จะไม่แสดงชื่อสินค้า',
    uiDisplayValue: 'แสดงตัวเลขด้านล่าง',
    uiShow: 'แสดง',
    uiHide: 'ซ่อน',
    uiBarColorLabel: 'สีแท่งบาร์ (สีด้านหน้า)',
    uiBarColorHelp: 'สีบาร์โค้ด',
    uiBgColorLabel: 'สีพื้นหลัง',
    uiBgColorHelp: 'สีพื้นหลัง',
    uiTitleColorLabel: 'สีชื่อสินค้า',
    uiTitleColorHelp: 'สีข้อความชื่อสินค้า',
    uiTitleSizeLabel: 'ขนาดฟอนต์ชื่อสินค้า',
    uiTitleWeightLabel: 'ความหนาฟอนต์ชื่อสินค้า',
    uiWeightNormal: 'ปกติ',
    uiWeightBold: 'หนา',
    uiWeightBolder: 'หนามาก',
    uiPresetLabel: 'พรีเซ็ตสี',
    uiPresetClassic: 'คลาสสิก',
    uiPresetBlue: 'น้ำเงิน',
    uiPresetGreen: 'เขียว',
    uiPresetBrown: 'น้ำตาล',
    uiPresetDark: 'เข้ม',
    uiBarWidthLabel: 'ความกว้างแท่ง',
    uiBarHeightLabel: 'ความสูงบาร์โค้ด',
    uiMarginLabel: 'ระยะขอบ',
    uiFontSizeLabel: 'ขนาดตัวเลขด้านล่าง',
    uiPreview: '👁️ ตัวอย่าง',
    uiDownloadScale: 'สเกลดาวน์โหลด',
    uiDownloadPng: '⬇️ ดาวน์โหลด PNG',
    uiDownloadSvg: '📄 ดาวน์โหลด SVG',
    uiInfoEmpty: 'ป้อนเนื้อหาเพื่อสร้างบาร์โค้ดอัตโนมัติ',
    uiAd: 'พื้นที่โฆษณา (AdSense)',
    uiGuideTitle: 'คู่มือรูปแบบบาร์โค้ด',
    uiGuide1Desc: 'รูปแบบที่ใช้งานได้หลากหลายที่สุด รองรับตัวอักษร ตัวเลข และสัญลักษณ์ โดยแทบไม่มีข้อจำกัดความยาว',
    uiGuide2Desc: 'มาตรฐานค้าปลีกสากล ใช้กับสินค้าในซูเปอร์มาร์เก็ตและร้านสะดวกซื้อ (13 หลัก)',
    uiGuide3Desc: 'รหัสค้าปลีกสหรัฐ/แคนาดา บาร์โค้ด 12 หลักที่จำเป็นสำหรับตลาดอเมริกาเหนือ',
    uiGuide4Desc: 'สำหรับกล่องโลจิสติกส์ ใช้กับหน่วยขนส่งที่รวมสินค้าหลายรายการ',
    uiFmtCode128: 'CODE128 - ทั่วไป (ข้อความ/ตัวเลข)',
    uiFmtCode39: 'CODE39 - อุตสาหกรรม',
    uiFmtEan13: 'EAN-13 - สินค้าค้าปลีก (13 หลัก)',
    uiFmtEan8: 'EAN-8 - สินค้าค้าปลีกขนาดเล็ก (8 หลัก)',
    uiFmtUpc: 'UPC-A - ค้าปลีกสหรัฐ (12 หลัก)',
    uiFmtItf14: 'ITF-14 - โลจิสติกส์/กล่อง',
    uiFmtMsi: 'MSI - คลังสินค้า',
    hints: {
      CODE128: 'CODE128: รองรับตัวอักษร ตัวเลข และสัญลักษณ์',
      CODE39: 'CODE39: ตัวพิมพ์ใหญ่ (A-Z), ตัวเลข (0-9) และสัญลักษณ์บางส่วน (-. *$/+%)',
      EAN13: 'EAN-13: กรอกตัวเลข 13 หลัก (หลักสุดท้ายคำนวณเช็คซัมอัตโนมัติ)',
      EAN8: 'EAN-8: กรอกตัวเลข 8 หลัก',
      UPC: 'UPC-A: กรอกตัวเลข 12 หลัก',
      ITF14: 'ITF-14: ตัวเลข 14 หลัก (จำนวนหลักเป็นเลขคู่)',
      MSI: 'MSI: กรอกได้เฉพาะตัวเลข',
    },
    errEan13: 'EAN-13 ต้องเป็นตัวเลข 12 หลัก (เช็คซัมอัตโนมัติ) หรือ 13 หลักเท่านั้น',
    errEan8: 'EAN-8 ต้องเป็นตัวเลข 7 หลัก (เช็คซัมอัตโนมัติ) หรือ 8 หลักเท่านั้น',
    errUpc: 'UPC-A ต้องเป็นตัวเลข 11 หลัก (เช็คซัมอัตโนมัติ) หรือ 12 หลักเท่านั้น',
    errItf14: 'ITF-14 ต้องเป็นตัวเลข 14 หลัก (หรือ 13 หลัก+เช็คซัม) เท่านั้น',
    errMsi: 'MSI รองรับเฉพาะตัวเลขเท่านั้น',
    emptyData: 'กรุณาป้อนข้อมูลบาร์โค้ด',
    invalidDataPrefix: 'ข้อมูลไม่ถูกต้อง: ',
    invalidDataFallback: 'กรุณาตรวจสอบรูปแบบ',
    renderFailed: 'สร้างไม่สำเร็จ',
    infoFormat: 'รูปแบบ',
    infoData: 'ข้อมูล',
    alertGenerateFirst: 'โปรดสร้างบาร์โค้ดก่อน',
  },
};

BC_UI_I18N.de = {
  ...BC_UI_I18N.en,

    uiOptions: '⚙️ Optionen',
    uiTabInput: 'Inhalt',
    uiTabStyle: 'Stil',
    uiTabSize: 'Größe',
    uiFormatLabel: 'Barcode Format',
    uiDataLabel: 'Barcode Daten',
    uiDataPlaceholder: 'Geben Sie Zahlen oder Text für den Barcode ein',
    uiProductLabel: 'Produktname',
    uiProductSmall: 'Wird über dem Barcode angezeigt',
    uiProductPlaceholder: 'z.B. Schokoladensnack 300g',
    uiProductHelp: 'Bleibt das Feld leer, wird kein Produktname angezeigt',
    uiDisplayValue: 'Zahlen unten anzeigen',
    uiShow: 'Zeigen',
    uiHide: 'Verstecken',
    uiBarColorLabel: 'Balkenfarbe (Vordergrund)',
    uiBarColorHelp: 'Barcode Farbe',
    uiBgColorLabel: 'Hintergrundfarbe',
    uiBgColorHelp: 'Hintergrundfarbe',
    uiTitleColorLabel: 'Produktname Farbe',
    uiTitleColorHelp: 'Textfarbe des Produktnamens',
    uiTitleSizeLabel: 'Schriftgröße des Produktnamens',
    uiTitleWeightLabel: 'Produktname, Schriftstärke',
    uiWeightNormal: 'Normal',
    uiWeightBold: 'Deutlich',
    uiWeightBolder: 'Extra fett',
    uiPresetLabel: 'Farbvoreinstellungen',
    uiPresetClassic: 'Klassiker',
    uiPresetBlue: 'Blau',
    uiPresetGreen: 'Grün',
    uiPresetBrown: 'Braun',
    uiPresetDark: 'Dunkel',
    uiBarWidthLabel: 'Balkenbreite',
    uiBarHeightLabel: 'Barcode Höhe',
    uiMarginLabel: 'Marge',
    uiFontSizeLabel: 'Schriftgröße für Zahlen',
    uiPreview: '👁️ Vorschau',
    uiDownloadScale: 'Laden Sie Scale herunter',
    uiDownloadPng: '⬇️ Laden Sie PNG herunter',
    uiDownloadSvg: '📄 Laden Sie SVG herunter',
    uiInfoEmpty: 'Geben Sie Inhalte ein, um Ihren Barcode automatisch zu generieren',
    uiAd: 'Werbefläche (AdSense)',
    uiGuideTitle: 'Barcode Formatanleitung',
    uiGuide1Desc: 'Vielseitigstes Format. Unterstützt Buchstaben, Zahlen und Symbole ohne praktische Längenbeschränkung.',
    uiGuide2Desc: 'Internationaler Einzelhandelsstandard. Wird häufig für Produkte in Supermärkten und Convenience-Stores verwendet (13 Ziffern).',
    uiGuide3Desc: 'In den USA und Kanada verwendeter Einzelhandelscode. Erforderlicher 12-stelliger Barcode für nordamerikanische Märkte.',
    uiGuide4Desc: 'Wird für Logistikboxen verwendet. Wird auf gruppierte Versandeinheiten angewendet, die mehrere Einzelhandelsartikel enthalten.',
    uiFmtCode128: 'CODE128 – Allgemein (Text/Zahlen)',
    uiFmtCode39: 'CODE39 - ​​Industriell',
    uiFmtEan13: 'EAN-13 – Einzelhandelsprodukt (13 Ziffern)',
    uiFmtEan8: 'EAN-8 – Kleines Einzelhandelsprodukt (8 Ziffern)',
    uiFmtUpc: 'UPC-A – US-Einzelhandel (12 Ziffern)',
    uiFmtItf14: 'ITF-14 - ​​Logistik/Box',
    uiFmtMsi: 'MSI - ​​Inventar',
    hints: {
      CODE128: 'CODE128: Buchstaben, Zahlen und Symbole werden unterstützt',
      CODE39: 'CODE39: Großbuchstaben A–Z, Ziffern 0–9 und begrenzte Symbole (-. *$/+%)',
      EAN13: 'EAN-13: Geben Sie 13 Ziffern ein (letzte Ziffer wird automatisch geprüft)',
      EAN8: 'EAN-8: Geben Sie 8 Ziffern ein',
      UPC: 'UPC-A: Geben Sie 12 Ziffern ein',
      ITF14: 'ITF-14: 14 Ziffern (gerade Zahl)',
      MSI: 'MSI: nur Ziffern',
    },
    errEan13: 'EAN-13 erfordert 12 Ziffern (automatische Prüfsumme) oder 13 Ziffern.',
    errEan8: 'EAN-8 erfordert 7 Ziffern (automatische Prüfsumme) oder 8 Ziffern.',
    errUpc: 'UPC-A erfordert 11 Ziffern (automatische Prüfsumme) oder 12 Ziffern.',
    errItf14: 'ITF-14 erfordert 14 Ziffern (oder 13 Ziffern + Prüfsumme).',
    errMsi: 'MSI akzeptiert nur Ziffern.',
    emptyData: 'Bitte geben Sie Barcode-Daten ein',
    invalidDataPrefix: 'Ungültige Daten:',
    invalidDataFallback: 'Bitte überprüfen Sie das Format',
    renderFailed: 'Die Generierung ist fehlgeschlagen',
    infoFormat: 'Format',
    infoData: 'Daten',
    alertGenerateFirst: 'Generieren Sie zunächst einen Barcode',
};

function getCurrentLangForBC() {
  const supported = ['ko', 'en', 'ja', 'zh', 'es', 'fr', 'pt', 'de', 'vi', 'th'];
  const saved = localStorage.getItem('alaskahqr_lang');
  if (saved && supported.includes(saved)) return saved;
  const docLang = (document.documentElement.lang || '').slice(0, 2);
  if (supported.includes(docLang)) return docLang;
  const browserLang = (navigator.language || '').slice(0, 2);
  return supported.includes(browserLang) ? browserLang : 'ko';
}

function bct(key) {
  const lang = getCurrentLangForBC();
  return BC_UI_I18N[lang]?.[key] || BC_UI_I18N.en[key] || BC_UI_I18N.ko[key] || key;
}

function getFormatHint(format) {
  const lang = getCurrentLangForBC();
  return (
    BC_UI_I18N[lang]?.hints?.[format] ||
    BC_UI_I18N.en.hints[format] ||
    BC_UI_I18N.ko.hints[format] ||
    ''
  );
}

function applyBCStaticTexts() {
  const setRadioLabelText = (labelEl, text) => {
    if (!labelEl) return;
    let textNode = null;
    for (const node of labelEl.childNodes) {
      if (node.nodeType === Node.TEXT_NODE) {
        textNode = node;
      }
    }
    if (textNode) {
      textNode.textContent = ` ${text}`;
    } else {
      labelEl.appendChild(document.createTextNode(` ${text}`));
    }
  };

  const panelTitle = document.querySelector('.options-col .panel .panel-title');
  if (panelTitle) panelTitle.textContent = bct('uiOptions');

  const tabInput = document.querySelector('.tab-btn[data-tab="bc-tab-input"]');
  if (tabInput) tabInput.textContent = bct('uiTabInput');
  const tabStyle = document.querySelector('.tab-btn[data-tab="bc-tab-style"]');
  if (tabStyle) tabStyle.textContent = bct('uiTabStyle');
  const tabSize = document.querySelector('.tab-btn[data-tab="bc-tab-size"]');
  if (tabSize) tabSize.textContent = bct('uiTabSize');

  const formatLabel = document.getElementById('bc-format')?.closest('.form-group')?.querySelector('.form-label');
  if (formatLabel) formatLabel.textContent = bct('uiFormatLabel');
  const optCode128 = document.querySelector('#bc-format option[value="CODE128"]');
  if (optCode128) optCode128.textContent = bct('uiFmtCode128');
  const optCode39 = document.querySelector('#bc-format option[value="CODE39"]');
  if (optCode39) optCode39.textContent = bct('uiFmtCode39');
  const optEan13 = document.querySelector('#bc-format option[value="EAN13"]');
  if (optEan13) optEan13.textContent = bct('uiFmtEan13');
  const optEan8 = document.querySelector('#bc-format option[value="EAN8"]');
  if (optEan8) optEan8.textContent = bct('uiFmtEan8');
  const optUpc = document.querySelector('#bc-format option[value="UPC"]');
  if (optUpc) optUpc.textContent = bct('uiFmtUpc');
  const optItf14 = document.querySelector('#bc-format option[value="ITF14"]');
  if (optItf14) optItf14.textContent = bct('uiFmtItf14');
  const optMsi = document.querySelector('#bc-format option[value="MSI"]');
  if (optMsi) optMsi.textContent = bct('uiFmtMsi');

  const dataLabel = document.getElementById('bc-data')?.closest('.form-group')?.querySelector('.form-label');
  if (dataLabel) dataLabel.textContent = bct('uiDataLabel');
  const dataInput = document.getElementById('bc-data');
  if (dataInput) dataInput.placeholder = bct('uiDataPlaceholder');

  const productLabel = document.getElementById('bc-product-name')?.closest('.form-group')?.querySelector('.form-label');
  if (productLabel && productLabel.querySelector('small')) {
    const small = productLabel.querySelector('small');
    productLabel.childNodes[0].textContent = `${bct('uiProductLabel')} `;
    small.textContent = bct('uiProductSmall');
  }
  const productInput = document.getElementById('bc-product-name');
  if (productInput) productInput.placeholder = bct('uiProductPlaceholder');
  const productHelp = document.getElementById('bc-product-name')?.closest('.form-group')?.querySelector('div[style*="font-size:.78rem"]');
  if (productHelp) productHelp.textContent = bct('uiProductHelp');

  const displayLabel = document.querySelector('input[name="bc-display-value"]')?.closest('.form-group')?.querySelector('.form-label');
  if (displayLabel) displayLabel.textContent = bct('uiDisplayValue');
  const showLabel = document.querySelector('input[name="bc-display-value"][value="true"]')?.closest('label');
  setRadioLabelText(showLabel, bct('uiShow'));
  const hideLabel = document.querySelector('input[name="bc-display-value"][value="false"]')?.closest('label');
  setRadioLabelText(hideLabel, bct('uiHide'));

  const fgLabel = document.getElementById('bc-fg-color')?.closest('.form-group')?.querySelector('.form-label');
  if (fgLabel) fgLabel.textContent = bct('uiBarColorLabel');
  const fgHelp = document.getElementById('bc-fg-hex')?.parentElement?.querySelector('span');
  if (fgHelp) fgHelp.textContent = bct('uiBarColorHelp');

  const bgLabel = document.getElementById('bc-bg-color')?.closest('.form-group')?.querySelector('.form-label');
  if (bgLabel) bgLabel.textContent = bct('uiBgColorLabel');
  const bgHelp = document.getElementById('bc-bg-hex')?.parentElement?.querySelector('span');
  if (bgHelp) bgHelp.textContent = bct('uiBgColorHelp');

  const titleColorLabel = document.getElementById('bc-title-color')?.closest('.form-group')?.querySelector('.form-label');
  if (titleColorLabel) titleColorLabel.textContent = bct('uiTitleColorLabel');
  const titleColorHelp = document.getElementById('bc-title-hex')?.parentElement?.querySelector('span');
  if (titleColorHelp) titleColorHelp.textContent = bct('uiTitleColorHelp');

  const titleSizeLabel = document.getElementById('bc-title-size')?.closest('.form-group')?.querySelector('.form-label');
  if (titleSizeLabel) titleSizeLabel.textContent = bct('uiTitleSizeLabel');
  const titleWeightLabel = document.querySelector('input[name="bc-title-weight"]')?.closest('.form-group')?.querySelector('.form-label');
  if (titleWeightLabel) titleWeightLabel.textContent = bct('uiTitleWeightLabel');
  const weightNormal = document.querySelector('input[name="bc-title-weight"][value="normal"]')?.closest('label');
  setRadioLabelText(weightNormal, bct('uiWeightNormal'));
  const weightBold = document.querySelector('input[name="bc-title-weight"][value="bold"]')?.closest('label');
  setRadioLabelText(weightBold, bct('uiWeightBold'));
  const weightBolder = document.querySelector('input[name="bc-title-weight"][value="800"]')?.closest('label');
  setRadioLabelText(weightBolder, bct('uiWeightBolder'));

  const presetLabel = document.querySelector('#bc-tab-style .bc-preset')?.closest('.form-group')?.querySelector('.form-label');
  if (presetLabel) presetLabel.textContent = bct('uiPresetLabel');
  const presets = document.querySelectorAll('#bc-tab-style .bc-preset');
  if (presets[0]) presets[0].title = bct('uiPresetClassic');
  if (presets[1]) presets[1].title = bct('uiPresetBlue');
  if (presets[2]) presets[2].title = bct('uiPresetGreen');
  if (presets[3]) presets[3].title = bct('uiPresetBrown');
  if (presets[4]) presets[4].title = bct('uiPresetDark');

  const widthLabel = document.getElementById('bc-width')?.closest('.form-group')?.querySelector('.form-label');
  if (widthLabel) widthLabel.textContent = bct('uiBarWidthLabel');
  const heightLabel = document.getElementById('bc-height')?.closest('.form-group')?.querySelector('.form-label');
  if (heightLabel) heightLabel.textContent = bct('uiBarHeightLabel');
  const marginLabel = document.getElementById('bc-margin')?.closest('.form-group')?.querySelector('.form-label');
  if (marginLabel) marginLabel.textContent = bct('uiMarginLabel');
  const fontSizeLabel = document.getElementById('bc-font-size')?.closest('.form-group')?.querySelector('.form-label');
  if (fontSizeLabel) fontSizeLabel.textContent = bct('uiFontSizeLabel');

  const previewTitle = document.querySelector('.preview-panel .panel-title');
  if (previewTitle) previewTitle.textContent = bct('uiPreview');
  const dlScaleLabel = document.querySelector('.preview-panel .preview-area > div[style*="width:100%"] > div[style*="font-size:.8rem"]');
  if (dlScaleLabel) dlScaleLabel.textContent = bct('uiDownloadScale');
  const pngBtn = document.querySelector(".download-group .btn-dl[onclick*=\"downloadBarcode('png')\"]");
  if (pngBtn) pngBtn.textContent = bct('uiDownloadPng');
  const svgBtn = document.querySelector(".download-group .btn-dl[onclick*=\"downloadBarcode('svg')\"]");
  if (svgBtn) svgBtn.textContent = bct('uiDownloadSvg');
  const supportTitle = document.getElementById('bc-support-title');
  if (supportTitle) supportTitle.textContent = bct('uiSupportTitle');
  const supportDesc = document.getElementById('bc-support-desc');
  if (supportDesc) supportDesc.textContent = bct('uiSupportDesc');
  const supportLink = document.getElementById('bc-support-link');
  if (supportLink) supportLink.textContent = bct('uiSupportButton');
  const infoEl = document.getElementById('bc-info');
  if (infoEl && !infoEl.textContent.includes('|')) infoEl.textContent = bct('uiInfoEmpty');
  const adWrap = document.querySelector('.ad-wrap');
  if (adWrap) adWrap.textContent = bct('uiAd');

  const guideTitle = document.querySelector('.features-bg .section-title');
  if (guideTitle) guideTitle.textContent = bct('uiGuideTitle');
  const guideItems = document.querySelectorAll('.features-bg .feature-item');
  if (guideItems[0]) {
    const p = guideItems[0].querySelector('p');
    if (p) p.textContent = bct('uiGuide1Desc');
  }
  if (guideItems[1]) {
    const p = guideItems[1].querySelector('p');
    if (p) p.textContent = bct('uiGuide2Desc');
  }
  if (guideItems[2]) {
    const p = guideItems[2].querySelector('p');
    if (p) p.textContent = bct('uiGuide3Desc');
  }
  if (guideItems[3]) {
    const p = guideItems[3].querySelector('p');
    if (p) p.textContent = bct('uiGuide4Desc');
  }
}

let renderTimer = null;

function calcMod10CheckDigit(digits) {
  let sum = 0;
  for (let i = 0; i < digits.length; i += 1) {
    const n = Number(digits[i]);
    sum += i % 2 === 0 ? n * 3 : n;
  }
  return (10 - (sum % 10)) % 10;
}

function calcEAN13CheckDigit(base12) {
  let sum = 0;
  for (let i = 0; i < base12.length; i += 1) {
    const n = Number(base12[i]);
    sum += i % 2 === 0 ? n : n * 3;
  }
  return (10 - (sum % 10)) % 10;
}

function calcEAN8CheckDigit(base7) {
  let sum = 0;
  for (let i = 0; i < base7.length; i += 1) {
    const n = Number(base7[i]);
    sum += i % 2 === 0 ? n * 3 : n;
  }
  return (10 - (sum % 10)) % 10;
}

function normalizeDataForFormat(rawData, format) {
  const data = String(rawData || '');
  const digits = data.replace(/\D/g, '');

  if (format === 'EAN13') {
    if (digits.length === 12) {
      return digits + String(calcEAN13CheckDigit(digits));
    }
    if (digits.length === 13) {
      const base = digits.slice(0, 12);
      return base + String(calcEAN13CheckDigit(base));
    }
    throw new Error(bct('errEan13'));
  }

  if (format === 'EAN8') {
    if (digits.length === 7) {
      return digits + String(calcEAN8CheckDigit(digits));
    }
    if (digits.length === 8) {
      const base = digits.slice(0, 7);
      return base + String(calcEAN8CheckDigit(base));
    }
    throw new Error(bct('errEan8'));
  }

  if (format === 'UPC') {
    if (digits.length === 11) {
      return digits + String(calcEAN8CheckDigit(digits));
    }
    if (digits.length === 12) {
      const base = digits.slice(0, 11);
      return base + String(calcEAN8CheckDigit(base));
    }
    throw new Error(bct('errUpc'));
  }

  if (format === 'ITF14') {
    if (digits.length === 13) {
      return digits + String(calcMod10CheckDigit(digits));
    }
    if (digits.length === 14) {
      return digits;
    }
    throw new Error(bct('errItf14'));
  }

  if (format === 'MSI') {
    if (!digits.length) {
      throw new Error(bct('errMsi'));
    }
    return digits;
  }

  if (format === 'CODE39') {
    return data.toUpperCase();
  }

  return data;
}

/* ========== RENDER ========== */

function renderBarcode() {
  const svgEl = document.getElementById('barcode-svg');
  const errorEl = document.getElementById('bc-error-msg');
  const productDisplay = document.getElementById('bc-product-display');
  const infoEl = document.getElementById('bc-info');

  if (!BCState.data || BCState.data.trim() === '') {
    svgEl.innerHTML = '';
    errorEl.style.display = 'block';
    errorEl.textContent = bct('emptyData');
    productDisplay.style.display = 'none';
    toggleBCSupportPrompt(false);
    return;
  }

  try {
    const normalizedData = normalizeDataForFormat(BCState.data, BCState.format);

    JsBarcode(svgEl, normalizedData, {
      format: BCState.format,
      lineColor: BCState.fgColor,
      background: BCState.bgColor,
      width: BCState.barWidth,
      height: BCState.barHeight,
      displayValue: BCState.displayValue,
      fontSize: BCState.fontSize,
      margin: BCState.margin,
      valid: () => true,
    });

    // Keep preview responsive even when encoded data is very long.
    svgEl.setAttribute('preserveAspectRatio', 'xMidYMid meet');

    errorEl.style.display = 'none';

    // Product name display
    if (BCState.productName.trim()) {
      productDisplay.style.display = 'block';
      productDisplay.textContent = BCState.productName;
      productDisplay.style.color = BCState.titleColor;
      productDisplay.style.fontSize = BCState.titleSize + 'px';
      productDisplay.style.fontWeight = BCState.titleWeight;
    } else {
      productDisplay.style.display = 'none';
    }

    // Info
    const svgRect = svgEl.getBoundingClientRect();
    if (infoEl) {
      infoEl.textContent = `${bct('infoFormat')}: ${BCState.format} | ${bct('infoData')}: ${normalizedData}`;
    }
    toggleBCSupportPrompt(true);

  } catch (err) {
    svgEl.innerHTML = '';
    productDisplay.style.display = 'none';
    errorEl.style.display = 'block';
    errorEl.textContent = bct('invalidDataPrefix') + (err.message || bct('invalidDataFallback'));
    if (infoEl) infoEl.textContent = bct('renderFailed');
    toggleBCSupportPrompt(false);
  }
}

function toggleBCSupportPrompt(show) {
  const prompt = document.getElementById('bc-support-prompt');
  if (!prompt) return;
  prompt.hidden = !show;
}

function scheduleRender() {
  clearTimeout(renderTimer);
  renderTimer = setTimeout(renderBarcode, 150);
}

/* ========== DOWNLOAD ========== */

function downloadBarcode(format) {
  const productName = BCState.productName.trim();
  const svgEl = document.getElementById('barcode-svg');

  if (!svgEl || !svgEl.querySelector('rect')) {
    alert(bct('alertGenerateFirst'));
    return;
  }

  if (format === 'svg') {
    downloadSVG(svgEl, productName);
  } else {
    downloadPNG(svgEl, productName, BCState.downloadScale);
  }
}

function downloadSVG(svgEl, productName) {
  // Clone svg and optionally add product name as text
  const clone = svgEl.cloneNode(true);

  if (productName) {
    // Add product name text above the barcode
    const titleFontSize = BCState.titleSize;
    const svgW = parseInt(svgEl.getAttribute('width') || svgEl.viewBox?.baseVal?.width || 200);
    const titleEl = document.createElementNS('http://www.w3.org/2000/svg', 'text');
    titleEl.setAttribute('x', svgW / 2);
    titleEl.setAttribute('y', titleFontSize + 4);
    titleEl.setAttribute('text-anchor', 'middle');
    titleEl.setAttribute('font-size', titleFontSize);
    titleEl.setAttribute('font-weight', BCState.titleWeight);
    titleEl.setAttribute('fill', BCState.titleColor);
    titleEl.setAttribute('font-family', 'sans-serif');
    titleEl.textContent = productName;
    clone.insertBefore(titleEl, clone.firstChild);
  }

  const svgData = new XMLSerializer().serializeToString(clone);
  const blob = new Blob([svgData], { type: 'image/svg+xml' });
  const url = URL.createObjectURL(blob);
  const link = document.createElement('a');
  link.href = url;
  link.download = `barcode-${Date.now()}.svg`;
  link.click();
  URL.revokeObjectURL(url);
}

function downloadPNG(svgEl, productName, scale) {
  const svgW = svgEl.width?.baseVal?.value || 200;
  const svgH = svgEl.height?.baseVal?.value || 120;
  const titleFontSize = BCState.titleSize;
  const titlePad = productName ? titleFontSize + 16 : 0;

  const canvas = document.createElement('canvas');
  canvas.width = (svgW) * scale;
  canvas.height = (svgH + titlePad) * scale;
  const ctx = canvas.getContext('2d');
  ctx.scale(scale, scale);

  // Background
  ctx.fillStyle = BCState.bgColor;
  ctx.fillRect(0, 0, svgW, svgH + titlePad);

  // Product name
  if (productName) {
    ctx.fillStyle = BCState.titleColor;
    ctx.font = `${BCState.titleWeight} ${titleFontSize}px sans-serif`;
    ctx.textAlign = 'center';
    ctx.textBaseline = 'top';
    ctx.fillText(productName, svgW / 2, 8);
  }

  // Render SVG to image then draw on canvas
  const svgData = new XMLSerializer().serializeToString(svgEl);
  const svgBlob = new Blob([svgData], { type: 'image/svg+xml;charset=utf-8' });
  const url = URL.createObjectURL(svgBlob);
  const img = new Image();
  img.onload = () => {
    ctx.drawImage(img, 0, titlePad, svgW, svgH);
    URL.revokeObjectURL(url);
    const link = document.createElement('a');
    link.download = `barcode-${Date.now()}.png`;
    link.href = canvas.toDataURL('image/png');
    link.click();
  };
  img.src = url;
}

/* ========== EVENT LISTENERS ========== */

document.addEventListener('DOMContentLoaded', () => {
  const htmlEl = document.documentElement;
  if (htmlEl) {
    const observer = new MutationObserver(mutations => {
      for (const m of mutations) {
        if (m.type === 'attributes' && m.attributeName === 'lang') {
          applyBCStaticTexts();
          const hint = document.getElementById('bc-format-hint');
          if (hint) hint.textContent = getFormatHint(BCState.format);
          scheduleRender();
          break;
        }
      }
    });
    observer.observe(htmlEl, { attributes: true, attributeFilter: ['lang'] });
  }

  // Initial render
  applyBCStaticTexts();
  const formatHint = document.getElementById('bc-format-hint');
  if (formatHint) formatHint.textContent = getFormatHint(BCState.format);
  scheduleRender();

  // Format
  document.getElementById('bc-format').addEventListener('change', e => {
    BCState.format = e.target.value;
    const hint = document.getElementById('bc-format-hint');
    if (hint) hint.textContent = getFormatHint(e.target.value);
    scheduleRender();
  });

  // Data input
  document.getElementById('bc-data').addEventListener('input', e => {
    BCState.data = e.target.value;
    scheduleRender();
  });

  // Product name
  document.getElementById('bc-product-name').addEventListener('input', e => {
    BCState.productName = e.target.value;
    scheduleRender();
  });

  // Display value (show/hide numbers below barcode)
  document.querySelectorAll('input[name="bc-display-value"]').forEach(radio => {
    radio.addEventListener('change', e => {
      BCState.displayValue = e.target.value === 'true';
      scheduleRender();
    });
  });

  // FG Color
  const fgColor = document.getElementById('bc-fg-color');
  const fgHex = document.getElementById('bc-fg-hex');
  fgColor.addEventListener('input', e => {
    BCState.fgColor = e.target.value;
    fgHex.value = e.target.value;
    scheduleRender();
  });
  fgHex.addEventListener('input', e => {
    if (/^#[0-9A-Fa-f]{6}$/.test(e.target.value)) {
      BCState.fgColor = e.target.value;
      fgColor.value = e.target.value;
      scheduleRender();
    }
  });

  // BG Color
  const bgColor = document.getElementById('bc-bg-color');
  const bgHex = document.getElementById('bc-bg-hex');
  bgColor.addEventListener('input', e => {
    BCState.bgColor = e.target.value;
    bgHex.value = e.target.value;
    scheduleRender();
  });
  bgHex.addEventListener('input', e => {
    if (/^#[0-9A-Fa-f]{6}$/.test(e.target.value)) {
      BCState.bgColor = e.target.value;
      bgColor.value = e.target.value;
      scheduleRender();
    }
  });

  // Title color
  const titleColor = document.getElementById('bc-title-color');
  const titleHex = document.getElementById('bc-title-hex');
  titleColor.addEventListener('input', e => {
    BCState.titleColor = e.target.value;
    titleHex.value = e.target.value;
    scheduleRender();
  });
  titleHex.addEventListener('input', e => {
    if (/^#[0-9A-Fa-f]{6}$/.test(e.target.value)) {
      BCState.titleColor = e.target.value;
      titleColor.value = e.target.value;
      scheduleRender();
    }
  });

  // Title size
  document.getElementById('bc-title-size').addEventListener('input', e => {
    BCState.titleSize = parseInt(e.target.value);
    document.getElementById('bc-title-size-val').textContent = e.target.value + 'px';
    scheduleRender();
  });

  // Title weight
  document.querySelectorAll('input[name="bc-title-weight"]').forEach(radio => {
    radio.addEventListener('change', e => {
      BCState.titleWeight = e.target.value;
      scheduleRender();
    });
  });

  // Bar width
  document.getElementById('bc-width').addEventListener('input', e => {
    BCState.barWidth = parseFloat(e.target.value);
    document.getElementById('bc-width-val').textContent = e.target.value;
    scheduleRender();
  });

  // Bar height
  document.getElementById('bc-height').addEventListener('input', e => {
    BCState.barHeight = parseInt(e.target.value);
    document.getElementById('bc-height-val').textContent = e.target.value + 'px';
    scheduleRender();
  });

  // Margin
  document.getElementById('bc-margin').addEventListener('input', e => {
    BCState.margin = parseInt(e.target.value);
    document.getElementById('bc-margin-val').textContent = e.target.value + 'px';
    scheduleRender();
  });

  // Font size
  document.getElementById('bc-font-size').addEventListener('input', e => {
    BCState.fontSize = parseInt(e.target.value);
    document.getElementById('bc-font-size-val').textContent = e.target.value + 'px';
    scheduleRender();
  });

  // Color presets
  document.querySelectorAll('.bc-preset').forEach(preset => {
    preset.addEventListener('click', () => {
      const fg = preset.dataset.fg;
      const bg = preset.dataset.bg;
      BCState.fgColor = fg;
      BCState.bgColor = bg;
      document.getElementById('bc-fg-color').value = fg;
      document.getElementById('bc-fg-hex').value = fg;
      document.getElementById('bc-bg-color').value = bg;
      document.getElementById('bc-bg-hex').value = bg;
      scheduleRender();
    });
  });

  // Download scale
  document.querySelectorAll('.size-btn[data-scale]').forEach(btn => {
    btn.addEventListener('click', () => {
      document.querySelectorAll('.size-btn[data-scale]').forEach(b => b.classList.remove('active'));
      btn.classList.add('active');
      BCState.downloadScale = parseInt(btn.dataset.scale);
    });
  });

  // Tab switching
  document.querySelectorAll('.tab-btn').forEach(btn => {
    btn.addEventListener('click', () => {
      document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
      document.querySelectorAll('.tab-pane').forEach(p => p.classList.remove('active'));
      btn.classList.add('active');
      document.getElementById(btn.dataset.tab).classList.add('active');
    });
  });
});