import { collection, query, where, getDocs } from 'firebase/firestore'; // tools for building and running db queries
import { db } from './config'; // database connection
import { getQueryPrefix } from '$lib/utils/geohash'; // convert coordinates into geohash string 

export async function getNearbyMessages(lat, lng) {
    const prefix = getQueryPrefix(lat, lng);

    const q = query(
        collection(db, 'messages'),
        where('geohash', '>=', prefix),
        where('geohash', '<', prefix + 'z')
    );

    const snapshot = await getDocs(q);
    return snapshot.docs.map(doc => ({ id: doc.id, ...doc.data() }));
}