#![warn(missing_docs, rust_2018_compatibility, rust_2018_idioms, unused)]

//! Reads OTP configuration from a QR code and writes it to an OTP slot on a Nitrokey device.

use std::process;

#[derive(Debug)]
struct Options {
    slot: u8,
    file: Option<String>,
    name: Option<String>,
}

fn parse_options() -> Result<Options, i32> {
    let mut options = Options {
        slot: 0,
        file: None,
        name: None,
    };
    let mut parser = argparse::ArgumentParser::new();
    parser.set_description(
        "Reads OTP configuration from a QR code and writes it to an OTP slot on a Nitrokey device.",
    );
    parser.refer(&mut options.slot).required().add_argument(
        "slot",
        argparse::Store,
        "The slot to write the OTP data to",
    );
    parser.refer(&mut options.file).add_argument(
        "file",
        argparse::StoreOption,
        "The file to read the QR code from",
    );
    parser.refer(&mut options.name).add_option(
        &["-n", "--name"],
        argparse::StoreOption,
        "The name to store in the OTP slot",
    );
    parser.parse_args()?;
    drop(parser);
    Ok(options)
}

fn main() {
    let status = match parse_options() {
        Ok(_) => 0,
        Err(err) => err,
    };
    process::exit(status);
}