const mongoose = require('mongoose');
const bcrypt = require('bcrypt');
const Schema = mongoose.Schema;

const userSchema = new Schema({
	'username': String,
	'password': String,
	'email': String,
	'locations': Array
});

userSchema.pre('save', function (next) {
	const user = this;
	bcrypt.hash(user.password, 10, function (err, hash) {
		if (err) {
			return next(err);
		}
		user.password = hash;
		next();
	});
});

userSchema.statics.authenticate = function (username, password, callback) {
	User.findOne({ username: username })
		.exec(function (err, user) {
			if (err) {
				return callback(err);
			} else if (!user) {
				const err = new Error("User not found.");
				err.status = 401;
				return callback(err);
			}
			bcrypt.compare(password, user.password, function (err, result) {
				if (result === true) {
					return callback(null, user);
				} else {
					return callback();
				}
			});

		});
}

const User = mongoose.model('user', userSchema);
module.exports = User;