const notDefault = (value, defaultValue) => (value !== defaultValue ? value : '')

const fontFamily = ({ fontFamily }, { fontFamilies } = {}) =>
  fontFamilies && fontFamilies[fontFamily] ? fontFamilies[fontFamily] : fontFamily

module.exports = {
  type: 'value',
  matcher: function (token) {
    return token.type === 'custom-fontStyle'
  },
  transformer: function ({ value: font }, { options }) {
    // font: font-style font-variant font-weight font-size/line-height font-family;
    return `${notDefault(font.fontStretch, 'normal')} ${notDefault(font.fontStyle, 'normal')} ${font.fontWeight} ${font.fontSize}/${font.lineHeight} ${fontFamily(font, options)}`.trim()
  },
}