import src.fw_api

import sys
from urllib.parse import unquote


def get_remote_file_name(url):
    '''This function return filename by content-disposition header'''
    r = src.fw_api.current_instance.s.head(url)
    content_dispos = r.headers.get('content-disposition')
    if content_dispos.startswith('attachment; filename*=UTF-8\'\''):
        return unquote(content_dispos.split('attachment; filename*=UTF-8\'\'')[-1])


def download_track(url, name=None):
    url = url.split('?')[0]  # Stripe all params from url
    r = src.fw_api.current_instance.s.get(url, stream=True)
    if not name:
        name = get_remote_file_name(url)
        if not name:
            name = url.split(r'/')[-1]

    with open(name.replace('/', '_'), 'wb') as f:
        print(f"Downloading {name}")
        total_length = r.headers.get('content-length')

        if total_length is None:  # no content length header
            f.write(r.content)
        else:
            dl = 0
            total_length = int(total_length)
            for data in r.iter_content(chunk_size=4096):
                dl += len(data)
                f.write(data)
                done = int(50 * dl / total_length)
                # base progress bar
                sys.stdout.write("\r[%s%s]" % ('=' * done, ' ' * (50-done)))
                sys.stdout.flush()
    return name