#!/usr/bin/python3

from twitter.twitter_utils import parse_media_file


def archive_media(media_url):
    """
    Parse the media file from the URL using Twitter API's parse_media_file method,
    then write the resulting temporary file to data/[filename].

    Arguments:
        media_url {str} -- String noting the URL of the uploaded media file

    Returns:
        str -- Resulting filename
    """
    temp_media_file, filename, size, media_type = parse_media_file(
        media_url)
    with open(f'data/{filename}', 'bw+') as archive_file:
        archive_file.writelines(temp_media_file.readlines())
    archive_file.close()
    temp_media_file.close()
    return filename


def filter_out_bad_content_type(video_variant_list):
    """
    Helper method to filter out unusable video variants from the list

    Arguments:
        video_variant_list {list} -- List of video variant definitions from the tweet

    Returns:
        list -- Resulting filtered video variant list
    """
    filtered_variant_list = []
    for video in video_variant_list:
        if(video['content_type'] == 'video/mp4'):
            filtered_variant_list.append(video)
    return filtered_variant_list


def select_video_variant(video_variant_list):
    """
    Iterate the video variants and pick the highest quality variant

    Arguments:
        video_variant_list {list} -- List of video variant definitions from the tweet

    Returns:
        str -- Resulting URL for the highest quality video variant
    """
    filtered_variant_list = filter_out_bad_content_type(video_variant_list)
    highest_bitrate_variant = filtered_variant_list[0]
    for video in filtered_variant_list:
        if(highest_bitrate_variant['bitrate'] < video['bitrate']):
            highest_bitrate_variant = video
    return highest_bitrate_variant['url']


def archive_media_status(status):
    """
    Locally archive any media from the given Tweepy API "Status" object

    Arguments:
        status {obj} -- Tweepy API "Status" object

    Returns:
        str -- None, or a list of filenames of the media archived locally
    """
    try:
        if(not ('retweeted_status' in status._json.keys()) and
           not (status.in_reply_to_status_id) and
           not (status.in_reply_to_user_id)):
            if('extended_tweet' in status._json.keys()):
                if('extended_entities' in status.extended_tweet.keys()):
                    if('media' in status.extended_tweet['extended_entities'].keys()):
                        archive_filenames = []
                        for media_dict in status.extended_tweet['extended_entities']['media']:
                            if(media_dict['type'] == 'photo'):
                                archive_filenames.append(
                                    archive_media(media_dict['media_url']))
                            elif(media_dict['type'] == 'video'):
                                archive_filenames.append(
                                    archive_media(select_video_variant(media_dict['video_info']['variants'])))
                        return archive_filenames
            elif('extended_entities' in status._json.keys()):
                if('media' in status.extended_entities.keys()):
                    archive_filenames = []
                    for media_dict in status.extended_entities['media']:
                        if(media_dict['type'] == 'photo'):
                            archive_filenames.append(
                                archive_media(media_dict['media_url']))
                        elif(media_dict['type'] == 'video'):
                            archive_filenames.append(
                                archive_media(select_video_variant(media_dict['video_info']['variants'])))
                    return archive_filenames
    except Exception as e:
        print(e)
        return ''