const express = require('express');
const router = express.Router();
const { v4: uuidv4 } = require('uuid');
const Utils = require('../utils');

const makeError = error => ({ success: false, error });

router.post('/', async (req, res) => {
	const { number, event } = req.body;

	try {
		event.id = uuidv4();
		let collection = req.db.collection('vehicles');
		await collection.updateOne({ number }, { $push: { events: event } });
		let vehicle = await collection.findOne({ number });
		if(vehicle) {
			res.send({ success: true, data: vehicle });
		} else {
			res.status(204).send(makeError('There is no vehicle with such plate number'));
		}
	} catch(ex) {
		res.send(makeError(ex.message));
		console.error(ex);
	}
});

router.delete('/', async (req, res) => {
	const { eventId } = req.body;

	try {
		let collection = req.db.collection('vehicles');
		let vehicle = await collection.findOne({ 'events.id': eventId });
		if(vehicle) {
			let index = vehicle.events.findIndex(e => e.id == eventId);
			if(index >= 0) {
				vehicle.events.splice(index, 1);
				await collection.updateOne({ number: vehicle.number }, { $set: { events: vehicle.events } });
			}
			res.send({ success: true, data: vehicle });
		} else {
			res.send(makeError('There is no vehicle with such event'));
		}
	} catch(ex) {
		res.send(makeError(ex.message));
		console.error(ex);
	}
});

router.put('/', async (req, res) => {
	const { event } = req.body;

	try {
		let collection = req.db.collection('vehicles');
		let vehicle = await collection.findOne({ 'events.id': event.id });
		if(vehicle) {
			let index = vehicle.events.findIndex(e => e.id == event.id);
			if(index >= 0) {
				vehicle.events[index] = event;
				await collection.updateOne({ number: vehicle.number }, { $set: { events: vehicle.events } });
				res.send({ success: true, data: vehicle });
			} else {
				res.send(makeError('Event not found'));
			}
		} else {
			res.send(makeError('There is no vehicle with such event'));
		}
	} catch(ex) {
		res.send(makeError(ex.message));
		console.error(ex);
	}
});

router.get('/', async (req, res) => {
	const { email } = req.user;

	try {
		let finalQuery = Utils.makeVehiclesSearchQuery(req.query, email);
		let collection = req.db.collection('vehicles');
		let vehicles = await collection.find(finalQuery, { number: 1, events: 1 }).toArray();
		let events = [];
		for(let vehicle of vehicles) {
			if(!vehicle.events) {
				continue;
			}

			for(let event of vehicle.events) {
				event.number = vehicle.number;
			}
			
			events = events.concat(vehicle.events);
		}
		res.send({ success: true, data: events });
	} catch(ex) {
		res.send(makeError(ex.message));
		console.error(ex);
	}
});

module.exports = router;