const log     = require('../utils/log.utils')
const auth    = require('../utils/auth.utils')
const db      = require('./dbAccess.services')
const mail    = require('./mail.services')
const clean   = require('../utils/sanitizer.utils')
const domains = require('../configs/domains.configs')

async function createRegKey(body) {
    log.out(`registerServices.createRegKey: Incoming request`, "INFO")
    const domain = await clean.getDomainFromEmail(body.email) // The function should validate the email
    log.out(`registerServices: New registration request from domain: ${domain}`, "info")
    if (domains.includes(domain)) {
      log.out(`registerServices.createRegKey: Key from valid domain: ${domain}`)
      const uuid = await auth.generateKey();
      db.addRegReq(uuid, domain)
      const message = await auth.generateConfirmationEmail(body.email, uuid)
      if (!message) {
        const err = new Error("Message generation error");
        log.out(`registerServices.createRegKey: Error generating registration email`, "err")
        return 500;
      }
      if (await mail.send(message) == true) {
        return {status: 201, message: "email sent"}
      }
      return {status: 500, message: "server error, email send failed"}
    }
    return {status: 403, message: "forbidden, domain is not on whitelist"}
}

async function regUser(req) { // Add input validation
  log.out(`registrationServices.regUser: Checking validity of : ${req.uuid}`, "info")
  const res = await auth.checkRequest(req.uuid)
  log.out(`registrationServices.regUser: checkRequest returned: ${JSON.stringify(res)}`, "info")
    if (res.result) {
        const uuid = await auth.generateKey()
        const apiKey = await db.addUser(uuid, res.domain)
        if (apiKey) {
            db.delRegReq(req.uuid)
            return {status: 201, message: "User added", api_key: uuid}
        }
    }
    return {status: 401, message: "Unauthorised"}
}

module.exports = {
    regUser,
    createRegKey
}