import db from '../db';

/*
  Options:
  - ref: Specify the ref of a document
  - collectionName: Specify the collection name
  - queryArgs: Specify the arguments to be passed down to .where()
  - orderByArgs: Specify the arguments to be passed down to .orderBy()
  - limit: Specify the fetching limit
  - docName: Specify the document name/id
*/
export default options => {
  const { ref, collectionName, queryArgs, orderByArgs, limit, docName } = options;

  if (ref != null) return ref;

  const initRef = db.collection(collectionName);

  if (docName != null) return initRef.doc(docName);

  if (queryArgs != null) {
    if (orderByArgs != null) {
      if (limit != null)
        return initRef
          .where(...queryArgs)
          .orderBy(...orderByArgs)
          .limit(limit);
      return initRef.where(...queryArgs).orderBy(...orderByArgs);
    }
    return initRef.where(...queryArgs);
  }

  return initRef;
};