use std::io::Read;
use std::time::SystemTime;

use jsonwebtoken::{encode, EncodingKey, Header};
use serde::Serialize;

#[derive(Debug, Serialize)]
struct UserClaims {
    aud: String,
    exp: u64,
    iat: u64,
    iss: String,
    nbf: u64,
    sub: String,
}

fn main() {
    let args: Vec<_> = std::env::args().collect();
    let mut secret = vec![];
    let mut f = std::fs::File::open(&args[1]).unwrap();
    f.read_to_end(&mut secret).unwrap();
    let k = EncodingKey::from_secret(&secret);
    let now = SystemTime::now()
        .duration_since(SystemTime::UNIX_EPOCH)
        .unwrap()
        .as_secs();
    let claims = UserClaims {
        aud: env!("CARGO_PKG_NAME").into(),
        exp: now + 604800,
        iat: now,
        iss: env!("CARGO_PKG_NAME").into(),
        nbf: now - 60,
        sub: args[2].to_string(),
    };
    let jwt = encode(&Header::default(), &claims, &k).unwrap();
    println!("{}", jwt);
}