#!/usr/bin/env python3

"""
This program downloads imgur, gfycat and direct image and video links of
saved posts from a reddit account. It is written in Python 3.
"""

import argparse
import logging
import sys

from bulkredditdownloader.downloader import RedditDownloader
from bulkredditdownloader.errors import BulkDownloaderException

logger = logging.getLogger()
parser = argparse.ArgumentParser(allow_abbrev=False,
                                 description="This program downloads media from reddit posts")


def _add_options():
    parser.add_argument("directory",
                        help="Specifies the directory where posts will be downloaded to",
                        metavar="DIRECTORY")
    parser.add_argument("--verbose", "-v",
                        help="Verbose Mode",
                        action="store_true",
                        default=False)
    parser.add_argument("--quit", "-q",
                        help="Auto quit afer the process finishes",
                        action="store_true",
                        default=False)
    parser.add_argument("--link", "-l",
                        help="Get posts from link",
                        metavar="link")
    parser.add_argument("--saved",
                        action="store_true",
                        required="--unsave" in sys.argv,
                        help="Triggers saved mode")
    parser.add_argument("--unsave",
                        action="store_true",
                        help="Unsaves downloaded posts")
    parser.add_argument("--submitted",
                        action="store_true",
                        help="Gets posts of --user")
    parser.add_argument("--upvoted",
                        action="store_true",
                        help="Gets upvoted posts of --user")
    parser.add_argument("--log",
                        help="Takes a log file which created by itself (json files),reads posts and tries "
                             "downloading them again.",
                        metavar="LOG FILE")
    parser.add_argument("--subreddit",
                        nargs="+",
                        help="Triggers subreddit mode and takes subreddit's name without r/. use \"frontpage\" "
                             "for frontpage",
                        metavar="SUBREDDIT",
                        type=str)
    parser.add_argument("--multireddit",
                        help="Triggers multireddit mode and takes multireddit's name without m",
                        metavar="MULTIREDDIT",
                        type=str)
    parser.add_argument("--user",
                        help="reddit username if needed. use \"me\" for current user",
                        required="--multireddit" in sys.argv or "--submitted" in sys.argv,
                        metavar="redditor",
                        type=str)
    parser.add_argument("--search",
                        help="Searches for given query in given subreddits",
                        metavar="query",
                        type=str)
    parser.add_argument("--sort",
                        help="Either hot, top, new, controversial, rising or relevance default: hot",
                        choices=["hot", "top", "new", "controversial", "rising", "relevance"],
                        metavar="SORT TYPE",
                        type=str)
    parser.add_argument("--limit",
                        help="default: unlimited",
                        metavar="Limit",
                        type=int)
    parser.add_argument("--time",
                        help="Either hour, day, week, month, year or all. default: all",
                        choices=["all", "hour", "day", "week", "month", "year"],
                        metavar="TIME_LIMIT",
                        type=str)
    parser.add_argument("--skip",
                        nargs="+",
                        help="Skip posts with given type",
                        type=str,
                        choices=["images", "videos", "gifs", "self"],
                        default=[])
    parser.add_argument("--skip-domain",
                        nargs="+",
                        help="Skip posts with given domain",
                        type=str,
                        default=[])
    parser.add_argument("--set-folderpath",
                        action="store_true",
                        help="Set custom folderpath",
                        default='{SUBREDDIT}'
                        )
    parser.add_argument("--set-filename",
                        action="store_true",
                        help="Set custom filename",
                        default='{REDDITOR}_{TITLE}_{POSTID}'
                        )
    parser.add_argument("--set-default-directory",
                        action="store_true",
                        help="Set a default directory to be used in case no directory is given",
                        )
    parser.add_argument("--set-default-options",
                        action="store_true",
                        help="Set default options to use everytime program runs",
                        )
    parser.add_argument("--use-local-config",
                        action="store_true",
                        help="Creates a config file in the program's directory"
                             " and uses it. Useful for having multiple configs",
                        )
    parser.add_argument("--no-dupes",
                        action="store_true",
                        help="Do not download duplicate posts on different subreddits",
                        )
    parser.add_argument("--downloaded-posts",
                        help="Use a hash file to keep track of downloaded files",
                        type=str
                        )
    parser.add_argument("--no-download",
                        action="store_true",
                        help="Just saved posts into a the POSTS.json file without downloading"
                        )


def _setup_logging(verbosity: int):
    logger.setLevel(1)
    stream = logging.StreamHandler(sys.stdout)
    formatter = logging.Formatter('[%(asctime)s - %(name)s - %(levelname)s] - %(message)s')
    stream.setFormatter(formatter)
    logger.addHandler(stream)
    if verbosity < 0:
        stream.setLevel(logging.INFO)
    else:
        stream.setLevel(logging.DEBUG)

    logging.getLogger('praw').setLevel(logging.CRITICAL)
    logging.getLogger('prawcore').setLevel(logging.CRITICAL)
    logging.getLogger('urllib3').setLevel(logging.CRITICAL)


def main(args: argparse.Namespace):
    _setup_logging(args.verbose)
    try:
        reddit_downloader = RedditDownloader(args)
        reddit_downloader.download()
    except BulkDownloaderException as e:
        logger.critical(f'An error occured {e}')


if __name__ == '__main__':
    _add_options()
    args = parser.parse_args()
    main(args)