use clap::{App, Arg, SubCommand};
use std::fs::File;
use std::io::Read;
use std::path::Path;
use torment_core::metainfo::Torrent;

fn main() {
    let matches = App::new("torment-cli")
        .version(env!("CARGO_PKG_VERSION"))
        .subcommand(
            SubCommand::with_name("torrent")
                .about("Shows details about torrent file")
                .arg(Arg::with_name("file").required(true)),
        )
        .get_matches();

    match matches.subcommand() {
        ("torrent", Some(subcmd)) => {
            let file = subcmd.value_of("file").unwrap();
            let mut bytes: Vec<u8> = vec![];
            File::open(file).unwrap().read_to_end(&mut bytes).unwrap();
            match Torrent::from_bytes(
                &bytes,
                Path::new(file)
                    .file_stem()
                    .and_then(|file_name| file_name.to_str())
                    .map(|str| str.to_string()),
            ) {
                Ok(torrent) => {
                    println!("{:#?}", torrent);
                }

                Err(err) => println!("Error: {}", err),
            }
        }

        _ => {}
    }
}