from os import path
import os
import tarfile
import shutil
import wget


DATA_DIR_URL = 'http://s3-us-west-1.amazonaws.com/media.spacynlp.com/en_data_all-0.4.tgz'

PARSER_URL = 'http://s3-us-west-1.amazonaws.com/media.spacynlp.com/en_deps-0.30.tgz'

DEP_VECTORS_URL = 'http://s3-us-west-1.amazonaws.com/media.spacynlp.com/vec.bin'

DEST_DIR = path.join(path.dirname(__file__), 'data')

def download_file(url, out):
    wget.download(url, out=out)
    return url.rsplit('/', 1)[1]


def install_all_data(url, dest_dir):
    filename = download_file(url, dest_dir)
    t = tarfile.open(path.join(dest_dir, filename))
    t.extractall(dest_dir)

def install_parser_model(url, dest_dir):
    filename = download_file(url, dest_dir)
    t = tarfile.open(path.join(dest_dir, filename), mode=":gz")
    t.extractall(path.dirname(__file__))


def install_dep_vectors(url, dest_dir):
    if not os.path.exists(dest_dir):
        os.mkdir(dest_dir)
    
    filename = download_file(url, dest_dir)


def main():
    if not path.exists(DEST_DIR):
        install_all_data(DATA_DIR_URL, path.dirname(DEST_DIR))
    else:
        install_parser_model(PARSER_URL, DEST_DIR)
        install_dep_vectors(DEP_VECTORS_URL, path.join(DEST_DIR, 'vocab'))


if __name__ == '__main__':
    main()