use std::fs;
use std::path::PathBuf;
use tempdir::TempDir;

#[test]
fn test_unpack_simple() {
    let unpack_dir = TempDir::new("ark_unpack").unwrap();
    ark::unpack("tests/samples/simple.tar.gz", unpack_dir.path()).unwrap();
    let unpack_path = unpack_dir.path().join("tests/samples/simple");
    compare_trees("tests/samples/simple".into(), unpack_path);
}

#[test]
fn test_unpack_symlinks() {
    let unpack_dir = TempDir::new("ark_unpack").unwrap();
    ark::unpack("tests/samples/symlinks.tar.gz", unpack_dir.path()).unwrap();
    let unpack_path = unpack_dir.path().join("tests/samples/symlinks");
    compare_trees("tests/samples/symlinks".into(), unpack_path);
}

#[test]
fn test_unpack_bz2() {
    let unpack_dir = TempDir::new("ark_unpack").unwrap();
    ark::unpack("tests/samples/simple.tar.bz2", unpack_dir.path()).unwrap();
    let unpack_path = unpack_dir.path().join("tests/samples/simple");
    compare_trees("tests/samples/simple".into(), unpack_path);
}

fn compare_trees(src: PathBuf, dst: PathBuf) {
    // we don't want to follow symlinks, because if the symlink points
    // within the archive then we'll be looking at it anyway, and if
    // points outside then it's out of scope for us
    let src_meta = src.symlink_metadata().unwrap();
    let dst_meta = dst.symlink_metadata().unwrap();
    assert_eq!(src_meta.file_type(), dst_meta.file_type());
    assert_eq!(src_meta.permissions(), dst_meta.permissions());
    if src_meta.is_symlink() {
        let src_target = fs::read_link(&src).unwrap();
        let dst_target = fs::read_link(&dst).unwrap();
        assert_eq!(src_target, dst_target);
    }
    // eventually compare content of files here
    else if src_meta.is_dir() {
        for entry in fs::read_dir(&src).unwrap() {
            let src_child = entry.unwrap().path();
            let dst_child = dst.join(src_child.file_name().unwrap());
            compare_trees(src_child, dst_child);
        }
    }
}