extern crate npacked;
extern crate docopt;

use docopt::Docopt;
use npacked::Package;
use std::fs;
use std::io::{Read, Write};

/// Docopt usage string
const USAGE: &'static str = r#"
Usage: unnpk [options] [--] <input>

Options:
  -p, --prefix PREFIX     Prefix outputed files with PREFIX [default: ./]
"#;

fn main() {
  // Get arguments
  let args = Docopt::new(USAGE).and_then(|d| d.parse()).unwrap();
  let npk = Package::open(args.get_str("<input>")).unwrap();
  
  loop {
    // Get a new file
    let mut file = match npk.next_file() {
      Ok(v) => match v {
        Some(f) => f,
        None => break
      },
      Err(e) => panic!(e)
    };
    
    // Open output file
    let mut outfile = fs::File::create(args.get_str("-p").to_owned() +
      file.name()).unwrap();
      
    // Write out TODO replace with tee
    let mut buf = Vec::<u8>::new();
    file.read_to_end(&mut buf).unwrap();
    outfile.write_all(buf.as_ref()).unwrap();
  }
}