use std::{collections::HashMap, fs, path::Path};

pub(crate) struct Parts {
    parts: HashMap<String, String>,
}

impl Parts {
    pub(crate) fn new() -> Self {
        let mut parts = HashMap::new();
        let parts_path = Path::new("templates/parts");
        for part in fs::read_dir(parts_path).expect("No templates/parts folder") {
            let part = part.unwrap();
            let filename = part.file_name().into_string().unwrap().to_string();
            let filename = filename.replace(".html", "");
            let path = format!("{}", part.path().display());

            let template = fs::read_to_string(path).unwrap();

            parts.insert(filename, template);
        }
        Self { parts }
    }

    pub(crate) fn perform(&self, input: String) -> String {
        let mut input = input;
        for (key, value) in &self.parts {
            let replace = format!("{{{{{}}}}}", key);
            input = input.replace(&replace, value);
        }
        input
    }
}