import path from 'node:path';

import fs from 'fs-extra';
import { camelCase } from 'lodash-es';

export const variables = function (src: string, common = {}) {
  const map: any = Object.assign({}, common || {});
  const normalize = path.posix.normalize(src);
  const dir = path.isAbsolute(src) ? normalize : path.posix.join(__dirname, '..', normalize);
  const text = fs.readFileSync(dir, 'utf-8');

  text.split('\n').forEach(function (row: any) {
    if (row.includes('import')) {
      const value = row
        .replace('@import', '')
        .replace('(reference)', '')
        .replace(/["';]/g, '')
        .trim();
      const parent = path.dirname(dir);
      const file = path.normalize(path.resolve(parent, value));
      const data = variables(file, common);
      Object.assign(map, data);
    } else if (/@/.test(row) && /:/.test(row) && /;/.test(row)) {
      const [, _key] = row.match(/@([\w-]+)/);
      const key = camelCase(_key);
      if (key in map) {
        return;
      }
      const value = row.slice(row.lastIndexOf(':') + 1, row.lastIndexOf(';')).replace(/\s|@/g, '');
      if (value in map) {
        map[key] = map[value];
      } else {
        map[key] = value;
      }
    }
  });
  return map;
};