import type { Linter, LinterInfo } from './interface';
import { lintWarning } from './utils';

function isConcatSelector(selector: string) {
  const notContent = selector.match(/:not\(([^)]*)\)/)?.[1] || '';

  // split selector. e.g.
  // `h1#a.b` => ['h1', #a', '.b']
  const splitCells = notContent.split(/(\[[^[]*])|(?=[.#])/).filter(str => str);

  return splitCells.length > 1;
}

function parsePath(info: LinterInfo) {
  return info.parentSelectors.reduce((prev, cur) => {
    if (!prev) {
      return cur;
    }

    return cur.includes('&') ? cur.replace(/&/g, prev) : `${prev} ${cur}`;
  }, '');
}

const linter: Linter = (_key, _value, info) => {
  const parentSelectorPath = parsePath(info);
  const notList = parentSelectorPath.match(/:not\([^)]*\)/g) || [];

  if (notList.length > 0 && notList.some(isConcatSelector)) {
    lintWarning(`Concat ':not' selector not support in legacy browsers.`, info);
  }
};

export default linter;