'use strict';
/*
    Example of mongoose usage and example of User model
*/

let mongoose = require('mongoose');
mongoose.Promise = global.Promise;

let host = '127.0.0.1';
let port = 27017;
let database = 'testdb';
let url = `mongodb://${host}:${port}/${database}`;
mongoose.connect(url);

let bcrypt = require('bcrypt');

let Schema = mongoose.Schema({
    name: {
        type: String,
        required: true
    },
    email: {
        type: String,
        unique: true,
        required: true
    },
    password: {
        type: String,
        required: true
    }
});

Schema.methods.comparePassword = function(password, cb) {
    const user = this;

    bcrypt.compare(password, user.password, (err, isMatch) => {
        if (err) {
            throw err;
        }

        if (!isMatch) {
            console.log('Password incorrect');
            return false;
        }

        console.log('Password is correct');
        return true;
    })
}

Schema.pre('save', function(next) {
    const user = this;

    bcrypt.genSalt((err, salt) => {
        if (err) {
            throw err;
        }

        bcrypt.hash(user.password, salt, (err, encrypted) => {
            if (err) {
                throw err;
            }

            user.password = encrypted;
            next();
        })
    })
})

let validateError = (err, cb) => {
    if (err.name == 'MongoError' && err.code == 11000) {
        console.log(`${err.name}[${err.code}]: ${err.message}`);
    }
    cb();
}

let User = mongoose.model('User', Schema);

let testUser = new User({
    name: 'Test User',
    email: 'test.user3@localhost',
    password: 'myPASSWoRd123'
});

testUser.save((err, user) => {
    if (err) {
        return validateError(err, () => {
            mongoose.connection.close();
        });
    }

    console.log(`User ${user.name} with email ${user.email} was saved successfully`);

    User.findOne({email: user.email}, (err, user) => {
        if (err) {
            return validateError(err, () => {
                mongoose.connection.close();
            })
        }

        user.comparePassword('myPASSWoRd1233');
        mongoose.connection.close();
    })

});