extern crate jsonwebtoken as jwt;
#[macro_use]
extern crate serde_derive;

use jwt::errors::ErrorKind;
use jwt::{decode, encode, Algorithm, Header, Validation};

#[derive(Debug, Serialize, Deserialize)]
struct Claims {
    sub: String,
    company: String,
    exp: usize,
}

fn main() {
    let my_claims =
        Claims { sub: "b@b.com".to_owned(), company: "ACME".to_owned(), exp: 10000000000 };
    let key = "secret";

    let mut header = Header::default();
    header.kid = Some("signing_key".to_owned());
    header.alg = Algorithm::HS512;

    let token = match encode(&header, &my_claims, key.as_ref()) {
        Ok(t) => t,
        Err(_) => panic!(), // in practice you would return the error
    };
    println!("{:?}", token);

    let token_data =
        match decode::<Claims>(&token, key.as_ref(), &Validation::new(Algorithm::HS512)) {
            Ok(c) => c,
            Err(err) => match *err.kind() {
                ErrorKind::InvalidToken => panic!(), // Example on how to handle a specific error
                _ => panic!(),
            },
        };
    println!("{:?}", token_data.claims);
    println!("{:?}", token_data.header);
}