use std::{env, path::PathBuf};

pub fn store_path() -> Option<PathBuf> {
    cache_dir().map(|c| c.join("syn"))
}

fn cache_dir() -> Option<PathBuf> {
    env::var_os("XDG_CACHE_HOME")
        .map(PathBuf::from)
        .or_else(|| home_dir().map(|h| h.join(".cache")))
}

fn home_dir() -> Option<PathBuf> {
    env::var_os("HOME")
        .and_then(|h| if h.is_empty() { None } else { Some(h) })
        .map(PathBuf::from)
}