use regex::{Captures, Regex};

pub fn replace<F>(text: &str, replacer: F) -> String
where
    F: Fn(&Captures) -> String,
{
    let regex = Regex::new(r"\{\{([\w_-]+)\}\}").unwrap();
    regex.replace_all(text, replacer).into_owned()
}

pub fn config_replacer<'a>(
    config: &'a crate::KV, blacklist_substrings: &'a [&'a str],
) -> impl Fn(&Captures) -> String + 'a {
    move |caps: &Captures| {
        let key = &caps[1];
        if blacklist_substrings.iter().any(|&substr| key.contains(substr)) {
            caps[0].to_string()
        } else {
            match config.get(key).ok() {
                Some(value) => value,
                None => caps[0].to_string(),
            }
        }
    }
}