use std::error::Error;
use std::fs::{self, File};
use std::io::Write;
use std::path::Path;

use lightningcss::printer::PrinterOptions;
use lightningcss::stylesheet::{self, ParserOptions, StyleSheet};


fn main() -> Result<(), Box<dyn Error>> {
    let scss_path = Path::new("styles/global.scss");
    let css_output_path = Path::new("public/styles/global.css");

    if let Some(parent) = css_output_path.parent() {
        fs::create_dir_all(parent)?;
    }

    let css = grass::from_path(scss_path, &grass::Options::default())
        .map_err(|e| Box::new(e) as Box<dyn Error>)?;

    let stylesheet = StyleSheet::parse(&css, ParserOptions::default()).unwrap();
    let minified_css = stylesheet.to_css(PrinterOptions {
        minify: true,
        ..PrinterOptions::default()
    }).unwrap();

    let mut output_file = File::create(css_output_path)?;
    output_file.write_all(minified_css.code.as_bytes())?;

    Ok(())
}