use anyhow::{self, Context};
use libradicl::{self, rad_types};
use std::io::BufReader;

fn main() -> anyhow::Result<()> {
    let fname = std::env::args().nth(1).context("missing input filename")?;
    {
        let f = std::fs::File::open(&fname)?;
        let mut ifile = BufReader::new(f);
        let p = libradicl::header::RadPrelude::from_bytes(&mut ifile)?;
        if let Ok(summary) = p.summary(None) {
            println!("{}", summary);
        }
        let ftmp = p.file_tags.parse_tags_from_bytes(&mut ifile)?;
        if let Some(rad_types::TagValue::ArrayU32(v)) = ftmp.get("ref_lengths") {
            println!(
                "file tag values: {:?}",
                v.iter().take(10).collect::<Vec<&u32>>()
            );
        } else {
            println!("file-level tags: {:?}", &ftmp);
        }
    }
    Ok(())
}