import { initializeApp } from "npm:firebase@9.20.0/app";

import { doc, getFirestore, setDoc } from "npm:firebase/firestore/lite";

/**

 * Overwrites or updates a document.

 *

 * @param document_path Path to the document.

 * If you want to update a top-level document by ID, pass in an array with only

 * the ID in it.

 * *eg:* `[ 'my-id' ]`

 *

 * @param merge If `true`, the document will be updated with provided fields,

 * otherwise the document will be completely overwritten.

 * **WARNING:** Overwriting a document may result in data loss.

 *

 * @param mergeFields Controls which fields should be merged.

 */

type Firebase = {

  apiKey: string;

  authDomain: string;

  projectId: string;

  storageBucket: string;

  messagingSenderId: string;

  appId: string;

  measurementId: string;

};

export async function main(

  auth: Firebase,

  collection_id: string,

  document_path: string[],

  document: Record<string, any>,

  merge?: boolean,

  mergeFields?: string[],

) {

  const app = initializeApp(auth);

  const store = getFirestore(app);

  const docRef = doc(store, collection_id, ...document_path);

  await setDoc(docRef, document, {

    merge: typeof merge === "boolean" ? merge : undefined,

    mergeFields:

      Array.isArray(mergeFields) && mergeFields.length

        ? mergeFields

        : undefined,

  });

}