import { Request, Response } from "express";
import { JWTHelper } from "../helpers/jwtHelper";
import { JWTToken } from "../type/jwtTypes";
import InternalException from "../exceptions/internalException";
import RefreshCommandHandler from "../command/refreshCommandHandler";
import { CreateRefreshCommand } from "../command/refreshCommand";
import speakeasy from "speakeasy";
import UnauthorizedRequestException from "../exceptions/unauthorizedRequestException";
import QRCode from "qrcode";
import { CreateUserCommand } from "../command/management/user/userCommand";
import UserCommandHandler from "../command/management/user/userCommandHandler";
import { CreateInviteCommand, DeleteInviteCommand } from "../command/management/user/inviteCommand";
import InviteCommandHandler from "../command/management/user/inviteCommandHandler";
import MailHelper from "../helpers/mailHelper";
import InviteService from "../service/management/inviteService";
import UserService from "../service/management/userService";
import CustomRequestException from "../exceptions/customRequestException";
import { CLUB_NAME } from "../env.defaults";
import { CreateUserPermissionCommand } from "../command/management/user/userPermissionCommand";
import UserPermissionCommandHandler from "../command/management/user/userPermissionCommandHandler";
import InviteFactory from "../factory/admin/management/invite";

/**
 * @description get all invites
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function getInvites(req: Request, res: Response): Promise<any> {
  let invites = await InviteService.getAll();

  res.json(InviteFactory.mapToBase(invites));
}

/**
 * @description start first user
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function inviteUser(req: Request, res: Response, isInvite: boolean = true): Promise<any> {
  let origin = req.headers.origin;
  let username = req.body.username;
  let mail = req.body.mail;
  let firstname = req.body.firstname;
  let lastname = req.body.lastname;

  let users = await UserService.getByMailOrUsername(mail, username);
  if (users.length == 1) {
    // username or mail is used
    if (users[0].username == username && users[0].mail == mail) {
      throw new CustomRequestException(409, "Username and Mail are already in use");
    } else if (users[0].username == username) {
      throw new CustomRequestException(409, "Username is already in use");
    } else {
      throw new CustomRequestException(409, "Mail is already in use");
    }
  } else if (users.length >= 2) {
    throw new CustomRequestException(409, "Username and Mail are already in use");
  }

  var secret = speakeasy.generateSecret({ length: 20, name: `Mitgliederverwaltung ${CLUB_NAME}` });

  let createInvite: CreateInviteCommand = {
    username: username,
    mail: mail,
    firstname: firstname,
    lastname: lastname,
    secret: secret.base32,
  };
  let token = await InviteCommandHandler.create(createInvite);

  // sendmail
  await MailHelper.sendMail(
    mail,
    `Email Bestätigung für Mitglieder Admin-Portal von ${CLUB_NAME}`,
    `Öffne folgenden Link: ${origin}/${isInvite ? "invite" : "setup"}/verify?mail=${mail}&token=${token}`
  );

  res.sendStatus(204);
}

/**
 * @description Create first user
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function verifyInvite(req: Request, res: Response): Promise<any> {
  let mail = req.body.mail;
  let token = req.body.token;

  let { secret, username } = await InviteService.getByMailAndToken(mail, token);

  const url = `otpauth://totp/Mitgliederverwaltung ${CLUB_NAME}?secret=${secret}`;

  QRCode.toDataURL(url)
    .then((result) => {
      res.json({
        dataUrl: result,
        otp: secret,
        username,
      });
    })
    .catch((err) => {
      throw new InternalException("QRCode not created", err);
    });
}

/**
 * @description Create first user
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function finishInvite(req: Request, res: Response, grantAdmin: boolean = false): Promise<any> {
  let mail = req.body.mail;
  let token = req.body.token;
  let totp = req.body.totp;

  let { secret, username, firstname, lastname } = await InviteService.getByMailAndToken(mail, token);

  let valid = speakeasy.totp.verify({
    secret: secret,
    encoding: "base32",
    token: totp,
    window: 2,
  });

  if (!valid) {
    throw new UnauthorizedRequestException("Token not valid or expired");
  }

  let createUser: CreateUserCommand = {
    username: username,
    firstname: firstname,
    lastname: lastname,
    mail: mail,
    secret: secret,
    isOwner: grantAdmin,
  };
  let id = await UserCommandHandler.create(createUser);

  let accessToken = await JWTHelper.buildToken(id);

  let refreshCommand: CreateRefreshCommand = {
    userId: id,
  };
  let refreshToken = await RefreshCommandHandler.create(refreshCommand);

  let deleteInvite: DeleteInviteCommand = {
    mail: mail,
    token: token,
  };
  await InviteCommandHandler.deleteByTokenAndMail(deleteInvite);

  res.json({
    accessToken,
    refreshToken,
  });
}

/**
 * @description delete invite by mail
 * @param req {Request} Express req object
 * @param res {Response} Express res object
 * @returns {Promise<*>}
 */
export async function deleteInvite(req: Request, res: Response): Promise<any> {
  const mail = req.params.mail;

  await InviteCommandHandler.deleteByMail(mail);

  res.sendStatus(204);
}