import jwt from "jsonwebtoken";
import { Handler,encrypt,decrypt,Strings,AppError } from "@onebro/oba-common";
import * as ob from "@onebro/oba-common";

export const generateTkn = (payload:any,secret:string,opts?:any) => jwt.sign(payload,secret,opts);
export const verifyTkn = (header:string,secret:string) => {
  if(!header) throw new AppError({message:"Not Authorized - No Header",status:401});
  const parts = header.split(" "),
  valid = parts[0] = "Bearer" && parts[1],
  token = valid?parts[1]:null;
  if(!token) throw new AppError({message:"Not Authorized - No Tkn",status:401});
  return jwt.verify(token,secret);};
export const validateAPIAuthTkn = (secret:string) => {
  const handler:Handler = async (req,res,next) => {
    try{
      req.authtkn = verifyTkn(req.headers.authorization,secret);
      if(!req.authtkn) return next(new AppError({message:"unauthorized",status:401}));
      return next();}
    catch(e){return next(e);}};
  return handler;};
export const validateAppUser = (cookieName:string,key:string) => {
  const handler:Handler = async (req,res,next) => {
    const cookie = req.cookies[cookieName]  as string;
    if(cookie) req.appuser = decrypt(key,cookie);
    return next();};
  return handler;};
export const refreshAppUser = (cookieName:string,key:string) => {
  const handler:Handler = async (req,res,next) => {
    if(res.locals.actionResult){
      const usernameEnc = encrypt(key,res.locals.actionResult.username||req.appuser);
      res.cookie(cookieName,usernameEnc,{maxAge:900000,httpOnly:true});}
    return next();};
  return handler;};
export const mapUserRole = (K:Strings,k?:string) => !k?"G":Object.keys(K).find(s => K[s] == k);
export const validateUserRole = (roles?:string[]) => {
  const R = roles || ["USER","GUEST"];
  const handler:Handler = async (req,res,next) => {
    if(!R.includes(req.authtkn.role)) return next(new AppError({message:"unauthorized",status:401}));
    return next();};
  return handler;};
export type OBNotificationData = {method:string;type:string;user:string;data:any};
export const notifyUser = async (o:OBNotificationData,doSend?:boolean|number) => doSend?ob.ok(o):null;