const log    = require('../utils/log.utils');
const crypto = require('crypto')
const db     = require('../services/dbAccess.services');
const fs     = require('fs/promises')

// Checks users registration key against issued keys
async function isAuthed(uuid) {  // Needs testing
    const q = {uuid: uuid}
    const res = await db.query("users", q)
    log.out(`authUtils.checkUser: DB Query answer: ${JSON.stringify(res[0])}`, "dbug")
    const authorized = res && res[0] && res[0].domain;
    if (authorized) db.userAtime(uuid)
    return authorized
}

// Checks whether a registration request key is valid
async function checkRequest(key) {
    const collection = "registrations"
    const query = {uuid: key}
    const res = await db.query(collection, query)
    log.out(`authUtils.checkRequest: DB Query result: ${JSON.stringify(res)}`, "dbug")
    const result = res.length > 0 && res[0].time
      ? { result: true, domain: res[0].domain }
      : { result: false };
    return result;
}

// Creates an API key for a user
async function generateKey() {  // Needs testing & moving to 'register.utils'
    return crypto.randomUUID()
};

async function generateConfirmationEmail(eml, uuid) {
    try {
        let htmlTpl = fs.readFile('mail-templates/register.html', 'utf-8');
        let txtTpl = fs.readFile('mail-templates/register.txt', 'utf-8');
        return msg = {
            to: eml,
            subject: "OwlBoard Registration",
            text: (await txtTpl).replace(/>>ACCESSCODE<</g, uuid),
            html: (await htmlTpl).replace(/>>ACCESSCODE<</g, uuid)
        }
    } catch(err) {
        log.out(`mailServices.generateConfirmationEmail: Error reading templates, $(err)`, "err");
        return false;
    }
}

module.exports = {
    isAuthed,
    generateKey,
    generateConfirmationEmail,
    checkRequest
}