const MongoClient = require('mongodb').MongoClient;
const dotenv = require('dotenv');
const dotenvExpand = require('dotenv-expand');

let dotenvConf = dotenv.config();
dotenvExpand(dotenvConf);

async function addUpdatedDate() {
	let client = await MongoClient.connect(process.env.MONGO_CONNECTION_STRING, { useUnifiedTopology: true });
	let db = client.db('autocatdev');
	let collection = db.collection('vehicles');
	let vehicles = await collection.find().toArray();
	for(let vehicle of vehicles) {
		let updatedDate = vehicle.addedDate;
		if(vehicle.events.length > 0) {
			let lastEvent = vehicle.events.reduce((acc, cur) => acc.date > cur.date ? acc : cur);
			updatedDate = Math.max(1000*lastEvent.date, vehicle.addedDate);
		}
		console.log(updatedDate);
		await collection.updateOne({ _id: vehicle._id }, { $set: { updatedDate } });
	}
}

(async () => {
	await addUpdatedDate();
	console.log('====== Done ======');
})();