const rtlRange = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC'
const ltrRange =
  'A-Za-z\u00C0-\u00D6\u00D8-\u00F6' +
  '\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF\u200E\u2C00-\uFB1C' +
  '\uFE00-\uFE6F\uFEFD-\uFFFF'

/* eslint-disable no-misleading-character-class */
const rtl = new RegExp('^[^' + ltrRange + ']*[' + rtlRange + ']')
const ltr = new RegExp('^[^' + rtlRange + ']*[' + ltrRange + ']')
/* eslint-enable no-misleading-character-class */

/**
 * Detect the direction of text: left-to-right, right-to-left, or neutral
 *
 * @param {string} value
 * @returns {'rtl'|'ltr'|'neutral'}
 */
export function direction(value) {
  const source = String(value || '')
  return rtl.test(source) ? 'rtl' : ltr.test(source) ? 'ltr' : 'neutral'
}