import argparse
import logging
import os
from typing import List
from time import sleep

import praw

from nextcloud import NextCloud
from praw.models.util import stream_generator
from gallery_dl.job import DownloadJob

from functools import reduce

from nextcloud import NextCloud

levels = {
    'critical': logging.CRITICAL,
    'error': logging.ERROR,
    'warn': logging.WARNING,
    'warning': logging.WARNING,
    'info': logging.INFO,
    'debug': logging.DEBUG
}

parser = argparse.ArgumentParser(description="Monitor saved")
parser.add_argument('-c', '--client-id',
                    help="Reddit client id",
                    default=os.environ.get('CLIENT_ID', ''))
parser.add_argument('-s', '--client-secret',
                    help="Reddit client secret",
                    default=os.environ.get('CLIENT_SECRET', ''))
parser.add_argument('-u', '--reddit-username',
                    help="Reddit username",
                    default=os.environ.get('REDDIT_USERNAME', ''))
parser.add_argument('-p', '--reddit-password',
                    help="Reddit user password",
                    default=os.environ.get('REDDIT_PASSWORD', ''))
parser.add_argument('-P', '--nextcloud-password',
                    help="Nextcloud Password",
                    default=os.environ.get('NEXTCLOUD_PASSWORD', ''))
parser.add_argument('-U', '--nextcloud-username',
                    help="Nextcloud Username",
                    default=os.environ.get('NEXTCLOUD_USERNAME', ''))
parser.add_argument('-o', '--nextcloud-host',
                    help="Nextcloud Host",
                    default=os.environ.get('NEXTCLOUD_HOST', 'localhost'))
parser.add_argument('-d', '--nextcloud-path',
                    help="Nextcloud root folder",
                    default=os.environ.get('NEXTCLOUD_PATH', 'im'))
parser.add_argument('-f', '--from-beginning',
                    dest='from_beginning',
                    help="it will attempt to download all saved posts from the beginning.",
                    action='store_true',
                    default=os.environ.get("FROM_BEGINNING") is not None)
parser.add_argument('-l', '--log-level',
                    default=os.environ.get('LOG_LEVEL', 'info'),
                    choices=levels.keys(),
                    help=f'it will set log level.')


def _create_folder(folder: str, nxc: NextCloud) -> str:
    nxc.create_folder(folder, True)
    return folder


def create_folders(path: str, nxc: NextCloud):
    # remove first "/" if there is one.
    path = path if path[0] != '/' else path[1:]
    folders = path.split("/")
    reduce(lambda x, y: _create_folder(f"{x}/{y}", nxc), folders, "")


def upload_file(local_filename: str, remote_filename: str, nxc: NextCloud):
    nxc.upload_file(local_filename, remote_filename)


def get_list_of_files(dirName):
    # create a list of file and sub directories
    # names in the given directory
    listOfFile = os.listdir(dirName)
    allFiles = list()
    # Iterate over all the entries
    for entry in listOfFile:
        # Create full path
        fullPath = os.path.join(dirName, entry)
        # If entry is a directory then get the list of files in this directory
        if os.path.isdir(fullPath):
            allFiles = allFiles + get_list_of_files(fullPath)
        else:
            allFiles.append(fullPath)

    return allFiles


def download(url) -> List[str]:
    d = DownloadJob(url=url)
    d.run()
    basedir = d.pathfmt.basedirectory
    files = get_list_of_files(basedir)
    return files


def main():
    args = parser.parse_args()

    level = levels.get(args.log_level.lower())
    logging.basicConfig(level=level)

    reddit = praw.Reddit(client_id=args.client_id,
                         client_secret=args.client_secret,
                         password=args.reddit_password,
                         user_agent="hcrawler",
                         username=args.reddit_username)

    nxc = NextCloud(
        args.nextcloud_host,
        user=args.nextcloud_username,
        password=args.nextcloud_password,
        session_kwargs={'verify': False}
    )

    redditor = reddit.redditor(args.reddit_username)


    def upload(post):
        try:
            url = post.url
            create_folders(f"{args.nextcloud_path}/{post.subreddit}/", nxc)
            logging.info(f"{post.id} from {post.subreddit} downloaded")
            for path in download(url):
                filename = os.path.basename(path)
                upload_file(path, f"{args.nextcloud_path}/{post.subreddit}/{filename}", nxc)
                os.unlink(path)
                logging.info(f"{path} uploaded")
        except Exception as e:
            logging.error(e)


    if args.from_beginning:
        logging.info(f"Downloading from the beginning")
        for post in redditor.saved(limit=None):
            upload(post)
            sleep(60)

    generator = stream_generator(redditor.saved, attribute_name="name")
    for post in generator:
        upload(post)