import { PrismaClient } from "@prisma/client";
import { nouns, adjectives } from "./words";
import jwt from "jsonwebtoken";
import nodemailer from "nodemailer";
import sgTransport from "nodemailer-sendgrid-transport";

export const prisma = new PrismaClient();

export const getUserId = (context) => {
  const Authorization = context.request.get("Authorization");
  if (Authorization) {
    const token = Authorization.replace("Bearer ", "");
    const { userId } = jwt.verify(token, process.env.JWT_SECRET);
    return userId;
  }
  throw new Error("There is no vaild user");
};

export const generateSecret = () => {
  const randomNumber = Math.floor(Math.random() * adjectives.length);
  return `${adjectives[randomNumber]} ${nouns[randomNumber]}`;
};

const sendEmail = (email) => {
  const options = {
    auth: {
      api_user: process.env.SENDGRID_USERNAME,
      api_password: process.env.SENDGRID_PASSWORD,
    },
  };
  const client = nodemailer.createTransport(sgTransport(options));
  return client.sendMail(email);
};

export const sendSecretMail = (address, emailSecret, value) => {
  const email = {
    from: "vel1024@khu.ac.kr",
    to: address,
    subject: `Authentication key for forgotten ${value}`,
    html: `Hello, This is khuchat, authentication key is <b>${emailSecret}</b>, copy and paste it, Thanks.`,
  };
  return sendEmail(email);
};

export const generateToken = (id) => jwt.sign({ id }, process.env.JWT_SECRET);