use std::{fs, io::{self}, path::{Path, PathBuf}};
use zip::read::ZipArchive;

pub fn extract_zip(src: &Path, dest: &Path) -> io::Result<()> {
    let file = fs::File::open(src)?;
    let mut archive = ZipArchive::new(file)?;
    fs::create_dir_all(dest)?;

    for i in 0..archive.len() {
        let mut entry = archive.by_index(i)?;
        let outpath = dest.join(sanitize_path(entry.name()));

        if entry.is_dir() {
            fs::create_dir_all(&outpath)?;
        } else {
            if let Some(p) = outpath.parent() { fs::create_dir_all(p)?; }
            let mut outfile = fs::File::create(&outpath)?;
            io::copy(&mut entry, &mut outfile)?;
            #[cfg(unix)]
            {
                use std::os::unix::fs::PermissionsExt;
                if let Some(mode) = entry.unix_mode() {
                    fs::set_permissions(&outpath, fs::Permissions::from_mode(mode))?;
                }
            }
        }
    }
    Ok(())
}

fn sanitize_path(name: &str) -> PathBuf {
    let path = Path::new(name);
    let mut clean = PathBuf::new();
    for comp in path.components() {
        use std::path::Component::*;
        match comp {
            Normal(c) => clean.push(c),
            CurDir | ParentDir | RootDir | Prefix(_) => { /* skip */ }
        }
    }
    clean
}