use std::{env::args, fs::File};

use log::{error, info, trace};
use nom::Parser;
use rsbag::{index::BagIndex, reader::IoReader};

fn main() {
    env_logger::init();

    let args: Vec<_> = args().collect();
    if args.len() != 2 {
        eprintln!("Usage: {} <bag path>", args[0]);
        return;
    }

    let bag_path = &args[1];
    let bag_file = File::open(bag_path).expect("Could not open bag file");
    let mut bag_reader = IoReader::new(bag_file);

    match BagIndex::read_all(&mut bag_reader) {
        Ok(index) => {
            for conn in &index.connections {
                let msgdef = conn.message_definition().unwrap();
                trace!("message definition: {}", msgdef);
                let parser = rsbag::message_definition::grammar::MessageDefinitionParser::new();
                match parser.parse(&msgdef) {
                    Ok(def) => info!("message definition parsed: {}", def),
                    Err(err) => error!("message definition parse error: {}", err),
                }
            }
        },
        Err(err) => error!("bag parse error: {}", err),
    }
}