import standards from '../../standards';
import isUnsupportedRole from './is-unsupported-role';

/**
 * Check if a given role is valid
 * @method isValidRole
 * @memberof axe.commons.aria
 * @instance
 * @param {String} role The role to check
 * @param {Object} options Use `allowAbstract` if you want abstracts, and `flagUnsupported: true` to report unsupported roles
 * @return {Boolean}
 */
function isValidRole(role, { allowAbstract, flagUnsupported = false } = {}) {
  const roleDefinition = standards.ariaRoles[role];
  const isRoleUnsupported = isUnsupportedRole(role);
  if (!roleDefinition || (flagUnsupported && isRoleUnsupported)) {
    return false;
  }
  return allowAbstract ? true : roleDefinition.type !== 'abstract';
}

export default isValidRole;