import jwt from "jsonwebtoken";
import { JWTData } from "../type/jwtTypes";
import { JWT_SECRET, JWT_EXPIRATION } from "../env.defaults";

export abstract class JWTHelper {
  static validate(token: string): Promise<string | jwt.JwtPayload> {
    return new Promise<string | jwt.JwtPayload>((resolve, reject) => {
      jwt.verify(token, JWT_SECRET, (err, decoded) => {
        if (err) reject(err.message);
        else resolve(decoded);
      });
    });
  }

  static create(data: JWTData): Promise<string> {
    return new Promise<string>((resolve, reject) => {
      jwt.sign(
        data,
        JWT_SECRET,
        {
          expiresIn: JWT_EXPIRATION,
        },
        (err, token) => {
          if (err) reject(err.message);
          else resolve(token);
        }
      );
    });
  }

  static decode(token: string): Promise<string | jwt.JwtPayload> {
    return new Promise<string | jwt.JwtPayload>((resolve, reject) => {
      try {
        let decoded = jwt.decode(token);
        resolve(decoded);
      } catch (err) {
        reject(err.message);
      }
    });
  }
}