const express = require('express')
const mongoose = require('mongoose')
const Schema = mongoose.Schema

let UserSchema = new Schema ({
    username: {
        type: String,
        unique: [true, "This username is taken."],
        trim: true
    },
    email: {
        type: String,
        unique: [true, "This email is already being used."],
        trim: true
    },
    password: {
        type: String,
        trim: true
    }
}, {
    timestamps: true,
    favorites: []
})

// first parameter is the name of the collection! If does not exist, will be created!
const User = mongoose.model('users', UserSchema)
module.exports = User

router.post('/signup/users', (req, res, next) => {
    req.checkBody('username', 'Username field cannot be empty.').notEmpty()
    req.checkBody('username', 'Username must be between 4-30 characters long.').len(4, 30)
    req.checkBody('email', 'The email you entered is invalid, please try again.').isEmail()
    req.checkBody('email', 'Email address must be between 4-100 characters long, please try again.').len(4, 100)
    req.checkBody('password', 'Password must be between 8-100 characters long.').len(8, 100)
    // req.checkBody('password', 'Password must include one lowercase character, one uppercase character, a number, and a special character.').matches(/^(?=.*d)(?=.*[a-z])(?=.*[A-Z])(?!.* )(?=.*[^a-zA-Z0-9]).{8,}$/, 'i')
    req.checkBody('passwordMatch', 'Password must be between 8-100 characters long.').len(8, 100)
    req.checkBody('passwordMatch', 'Passwords do not match, please try again.').equals(req.body.password)

    // Additional validation to ensure username is alphanumeric with underscores and dashes
    req.checkBody('username', 'Username can only contain letters, numbers, or underscores.').matches(/^[A-Za-z0-9_-]+$/, 'i')

    const errors = req.validationErrors()

    if(errors) {
        res.render('signup', {
            errors: errors
        })
    } else {
        let password = req.body.password
        bcrypt.hash(password, saltRounds, (err, hash) => {
            user = new User()
            user.username = req.body.username
            user.email = req.body.email
            user.password = hash

            user.save((err, result) => {
                if(err) {
                    console.log(err)
                } else {
                    User.find({}).sort({ _id:-1 }).limit(1)
                    .exec((err, newuser) => {
                        if (err) {
                            console.log(err)
                        } else {
                            userId = ObjectId(newuser.id)

                            // logins user through passport function
                            req.login(userId, (err) => {
                                if (err) {
                                    console.log("Login error: " + err)
                                } else {
                                    res.redirect('/home')
                                }
                            })
                        }
                    })
                    .catch(next)
                }
            })
        })
    }
})

kill -2 `pgrep mongo`