extern crate zip;

use std::io;
use std::fs;

fn main() {
    std::process::exit(real_main());
}

fn real_main() -> i32 {
    let args: Vec<_> = std::env::args().collect();
    if args.len() < 2 {
        println!("Usage: {} <filename>", args[0]);
        return 1;
    }
    let fname = std::path::Path::new(&*args[1]);
    let file = fs::File::open(&fname).unwrap();

    let mut archive = zip::ZipArchive::new(file).unwrap();

    for i in 0..archive.len() {
        let mut file = archive.by_index(i).unwrap();
        let outpath = sanitize_filename(file.name());

        {
            let comment = file.comment();
            if !comment.is_empty() {
                println!("${} comment: {}", i, comment);
            }
        }

        if (&*file.name()).ends_with('/') {
            println!("${}-> {}", i, outpath.as_path().display());
            fs::create_dir_all(&outpath).unwrap();
        } else {
            println!("${}-> {}: {}", i, outpath.as_path().display(), file.size());
            if let Some(p) = outpath.parent() {
                if !p.exists() {
                    fs::create_dir_all(&p).unwrap();
                }
            }
            let mut outfile = fs::File::create(&outpath).unwrap();
            io::copy(&mut file, &mut outfile).unwrap();
        }

        // Get and Set permissions
        #[cfg(unix)]
        {
            use std::os::unix::fs::PermissionsExt;

            if let Some(mode) = file.unix_mode() {
                fs::set_permissions(&outpath, fs::Permissions::from_mode(mode)).unwrap();
            }
        }
    }
    return 0;
}

fn sanitize_filename(filename: &str) -> std::path::PathBuf {
    let no_null_filename = match filename.find('\0') {
        Some(index) => &filename[0..index],
        None => filename,
    };

    std::path::Path::new(no_null_filename)
        .components()
        .filter(|component| match *component {
            std::path::Component::Normal(..) => true,
            _ => false,
        })
        .fold(std::path::PathBuf::new(), |mut path, ref cur| {
            path.push(cur.as_os_str());
            path
        })
}