import mongoose from "mongoose";
import "@/models";

const MONGODB_URI = process.env.MONGODB_URI;

if (!MONGODB_URI) {
	throw new Error("Please define the MONGODB_URI environment variable");
}

let cached = global.mongoose;

if (!cached) {
	cached = global.mongoose = { conn: null, promise: null };
}

async function dbConnect() {
	if (cached.conn) {
		return cached.conn;
	}

	if (!cached.promise) {
		const opts = {
			bufferCommands: false,
		};

		cached.promise = mongoose
			.connect(MONGODB_URI as string, opts)
			.then((mongoose) => {
				return mongoose;
			});
	}
	cached.conn = await cached.promise;
	return cached.conn;
}

export default dbConnect;