import core from 'pouchdb-core';
import idb from 'pouchdb-adapter-idb';
import http from 'pouchdb-adapter-http';
import replication from 'pouchdb-replication';
import find from 'pouchdb-find';

const PouchDB = core
	.plugin(idb)
	.plugin(http)
	.plugin(replication)
	.plugin(find);

export function generateAttachmentUrl(dbName, docId, attachmentKey) {
	return `/_doc_attachments/${dbName}/${docId}/${attachmentKey}`;
}

const dbs = new Map();
export function getDatabase(name = 'gallery') {
	if (!dbs.has(name)) {
		dbs.set(name, new PouchDB(name));
	}
	return dbs.get(name);
}

export async function getOrCreate(doc) {
	const db = getDatabase();
	try {
		const results = await db.get(doc._id);
		return [results, false];
	} catch (e) {
		if (e.status === 404) {
			const results = db.put(doc);
			return [results, true];
		}
		throw e;
	}
}