//! `memoryd serve --config <path>`.

use std::ffi::OsString;
use std::path::PathBuf;
use std::process::ExitCode;

const USAGE: &str = "usage: memoryd serve --config <path>";

fn main() -> ExitCode {
    let args: Vec<OsString> = std::env::args_os().skip(1).collect();
    let Some(config) = parse(&args) else {
        eprintln!("{USAGE}");
        return ExitCode::from(2);
    };
    match memoryd::config::Config::load(&config) {
        Ok(_) => {
            eprintln!("memoryd: not implemented");
            ExitCode::from(2)
        }
        Err(e) => {
            eprintln!("memoryd: {e}\nsee docs/runbook.md#memoryd-start-failed");
            ExitCode::from(1)
        }
    }
}

/// The config path of `serve --config <path>`, or `None` for any other list.
fn parse(args: &[OsString]) -> Option<PathBuf> {
    match args {
        [serve, flag, path] if serve == "serve" && flag == "--config" => Some(PathBuf::from(path)),
        _ => None,
    }
}