import { QueryError } from './query.error';

const CACHED_CONNECTIONS: any = {};

export function parseJson(jsonString: string, errorMessage?: string): object {
  try {
    return JSON.parse(jsonString);
  } catch (err) {
    throw new QueryError(errorMessage, err.message, {});
  }
}

export function cacheConnection(dataSourceId: string, connection: any): any {
  const updatedAt = new Date();
  CACHED_CONNECTIONS[dataSourceId] = { connection, updatedAt };
}

export function getCachedConnection(dataSourceId: string | number, dataSourceUpdatedAt: any): any {
  const cachedData = CACHED_CONNECTIONS[dataSourceId];

  if (cachedData) {
    const updatedAt = new Date(dataSourceUpdatedAt || null);
    const cachedAt = new Date(cachedData.updatedAt || null);

    const diffTime = (cachedAt.getTime() - updatedAt.getTime()) / 1000;

    if (diffTime < 0) {
      return null;
    } else {
      return cachedData['connection'];
    }
  }
}