// @flow
import type { Styles } from '../types/style'

/**
 * CSS to represent truncated text with an ellipsis. You can optionally pass a max-width and number of lines before truncating.
 *
 * @example
 * // Styles as object usage
 * const styles = {
 *   ...ellipsis('250px')
 * }
 *
 * // styled-components usage
 * const div = styled.div`
 *   ${ellipsis('250px')}
 * `
 *
 * // CSS as JS Output
 *
 * div: {
 *   'display': 'inline-block',
 *   'maxWidth': '250px',
 *   'overflow': 'hidden',
 *   'textOverflow': 'ellipsis',
 *   'whiteSpace': 'nowrap',
 *   'wordWrap': 'normal'
 * }
 */
export default function ellipsis(width?: ?string | ?number, lines?: number = 1): Styles {
  const styles = {
    display: 'inline-block',
    maxWidth: width || '100%',
    overflow: 'hidden',
    textOverflow: 'ellipsis',
    whiteSpace: 'nowrap',
    wordWrap: 'normal',
  }

  return lines > 1
    ? {
      ...styles,
      WebkitBoxOrient: 'vertical',
      WebkitLineClamp: lines,
      display: '-webkit-box',
      whiteSpace: 'normal',
    }
    : styles
}