import requests


def get_wall(tags):
    """
    get_wall(tags)

    Grabs a random wallpaper from unsplash.com's random function
    If any tags are passed in as the message, it will search for images
    matching those tags
    """
    unsplash_url = "https://source.unsplash.com/3840x2160/?"

    if len(tags.split()) > 2:
        search_terms = tags.split()[1:]

        # Turn search_terms into strings separated by commas
        joined_terms = ",".join(search_terms)

        # Add those comma separated strings onto the end of the URL variable
        url = unsplash_url + joined_terms

    else:
        url = unsplash_url + tags

    response = requests.get(url, timeout=8).url

    if "photo-1446704477871-62a4972035cd" in response:
        return "Could not find an image for those tags."
    else:
        return response