from urllib import request
from os import environ
import sys
import math
import tarfile

def print_progress_bar(percent_progress=0, char_size=50, clear_line=True):

    bar_progress = math.floor(char_size*(percent_progress/100))
    bar = "=" * bar_progress + " " * (char_size - bar_progress)

    if clear_line:
        sys.stdout.write(u"\u001b[1000D")
    sys.stdout.write("[{:s}] {:d}%".format(bar, int(percent_progress)))
    sys.stdout.flush()

def download_file(file_url, dest_path, bulk_size = 8192):

    req = request.urlopen(file_url)
    meta = req.info()
    file_size = int(meta.get('Content-Length'))

    with open(dest_path, 'wb') as dest_file:
        print('Downloading "{:s}". Size: {:d}b'.format(file_url, file_size))
        downloaded_size = 0
        while True:
            buff = req.read(bulk_size)
            if not buff:
                break
            downloaded_size += len(buff)
            dest_file.write(buff)
            progress = downloaded_size/file_size*100
            print_progress_bar(progress)
        dest_file.close()
    # Add linebreak
    print("")

def extract_tar(file_path, dest_dir = "."):
    print('Extracting "{:s}" to "{:s}"'.format(file_path, dest_dir))
    with tarfile.open(file_path) as tar:
        tar.extractall(dest_dir)
        tar.close()

def download_rkt():
    url = "https://github.com/coreos/rkt/releases/download/v1.22.0/rkt-v1.22.0.tar.gz"
    file_path="rkt.tar.gz"
    download_file(file_url=url, dest_path=file_path)
    extract_tar(file_path)

def download_acbuild():
    url = "https://github.com/containers/build/releases/download/v0.4.0/acbuild-v0.4.0.tar.gz"
    file_path="acbuild.tar.gz"
    download_file(file_url=url, dest_path=file_path)
    extract_tar(file_path)

if __name__ == "__main__":
    download_rkt()
    download_acbuild()