import { parse } from 'comment-json';
import { readFileSync, existsSync } from 'fs';
import { ReadConfigError } from './exceptions/read-config-error';

export function readConfigFile(path: string, mustExist = true): Record<string, any> {
  if (!mustExist && !existsSync(path)) {
    return {};
  }

  try {
    const parsed = parse(readFileSync(path, 'utf8'));
    const json: Record<string, any> = parsed && typeof parsed === 'object' ? (parsed as Record<string, any>) : {};
    delete json['$schema'];
    return json;
  } catch (err) {
    throw new ReadConfigError(path, err instanceof Error ? err : new Error(String(err)));
  }
}