const User = require('../models/user');
const express = require('express'); //using get/post here..
const router = new express.Router();

//Gets all users
router.get('/', async (req,res)=>{
	console.log("Got a request!");
	const allUsers = await User.find({});
	try {
		res.send(allUsers);
	} catch(e) {
		// statements
		res.status(404).send({error: "Cannot send users"});
	}
});

//Gets a user
router.get('/:uID', async (req,res)=>{
	const user = await User.findById(req.params.uID);
	try {
		res.send(user);
	} catch(e) {
		res.status(404).send({error: "Cannot send that user."});
	}
});

//Makes a new user
router.post('/', async (req, res)=>{

	console.log("User router: POST request - \n", req.body);
	try {
		const newUser = new User(req.body);
		await newUser.save(); //Don't save till the User is created

		res.status(201).send({newUser, message: "Created new user."});
		console.log(`New user [ ${newUser.userName} ]  is saved to database`);

	} catch(e) {	//Something bad happened.
		res.status(500).send({error : "Please check entries."});
	}
});

//Edit a user
router.patch('/:uID', async(req, res)=>{
	const user = await User.findById(req.params.uID);
	const fieldsToEdit = Object.keys(req.body);
	try {

		//For each field that was requested to be edit, change it.
		//Only changes the field that was requested to be changed.
		fieldsToEdit.forEach(field => {
			user[field] = req.body[field];
		});

		await user.save();

		res.send(user);
	} catch(e) {
		res.status(404).send({error: "Cannot send that user."});
	}

});

router.delete('/:uID', async (req, res)=>{
	try {
		const user = await User.findByIdAndDelete(req.params.uID);
		res.send(user);
	} catch(e) {
		// statements
		console.log(e);
		res.status(500).send();
	}
});

module.exports = router;