use std::fs::File;
use std::io::{BufReader, BufRead};

fn main() -> std::io::Result<()> {
    let fantoir_path = std::env::args().nth(1).unwrap();
    let file = match File::open(&fantoir_path) {
        Err(err) => panic!("Cannot read file {}: {}", fantoir_path, err),
        Ok(file) => file,
    };
    let reader = BufReader::new(file);
    println!("full_insee;rivoli_with_key;libelle");
    for line in reader.lines() {
        let l = line.unwrap();
        if l.chars().nth(3) == Some(' ') {
            // Enregistrement Département
        } else if l.chars().nth(6) == Some(' ') {
            // Enregistrement Commune
        } else  {
            let mut full_insee = String::from(l.get(0..2).unwrap());
            full_insee.push_str(l.get(3..6).unwrap());
            let rivoli_with_key = l.get(6..11).unwrap();
            let libelle = l.get(15..41).unwrap();
            println!("{};{};{}", full_insee, rivoli_with_key, libelle);
        }
    };
    Ok(())
}