use std::{fs::File, io::stdout, path::Path};

use clap::{App, Arg, SubCommand};
use embassy::config::action::{ConfigRes, SetResult};

fn main() {
    let app = App::new("compat").subcommand(
        SubCommand::with_name("config").subcommand(
            SubCommand::with_name("get")
                .arg(
                    Arg::with_name("mountpoint")
                        .help("The `mount` field from manifest.yaml")
                        .required(true),
                )
                .arg(
                    Arg::with_name("spec")
                        .help("The path to the config spec in the container")
                        .required(true),
                ),
        ),
    );
    let matches = app.get_matches();
    match matches.subcommand() {
        ("config", Some(sub_m)) => match sub_m.subcommand() {
            ("get", Some(sub_m)) => {
                let cfg_path =
                    Path::new(sub_m.value_of("mountpoint").unwrap()).join("start9/config.yaml");
                let cfg = if cfg_path.exists() {
                    Some(serde_yaml::from_reader(File::open(cfg_path).unwrap()).unwrap())
                } else {
                    None
                };
                let spec_path = Path::new(sub_m.value_of("spec").unwrap());
                let spec = serde_yaml::from_reader(File::open(spec_path).unwrap()).unwrap();
                serde_yaml::to_writer(stdout(), &ConfigRes { config: cfg, spec }).unwrap();
            }
            (subcmd, _) => {
                panic!("unknown subcommand: {}", subcmd);
            }
        },
        (subcmd, _) => {
            panic!("unknown subcommand: {}", subcmd);
        }
    }
}