import argparse
import io
import shlex


class CustomArgParser(argparse.ArgumentParser):
    def __init__(
            self,
            *args, **kwargs,
    ):
        super().__init__(*args, **kwargs)
        self.help_message = None

    def print_help(self, file=None):
        # Store the help message in a buffer instead of printing
        if file is None:
            help_buffer = io.StringIO()
            super().print_help(file=help_buffer)
            self.help_message = help_buffer.getvalue()
            help_buffer.close()
        else:
            super().print_help(file=file)

    def parse_args(self, args=None, namespace=None):
        # Check for --help manually to avoid stdout output
        if '--help' in args:
            self.print_help()
            raise RuntimeError("Help requested")
        return super().parse_args(args, namespace)

    def exit(self, status=0, message=None):
        raise RuntimeError(message)

    def error(self, message):
        raise RuntimeError(f"Error: {message}")


def create_parser():
    parser = CustomArgParser(
        description="A command to search random stuff on various image boorus. Feel free to use it irresponsibly!",
        usage="@owlrandomshitbot hentai BOORU_NAME --tags TAG1,TAG2,TAG3 -l LIMIT --random -s",
    )

    parser.add_argument("booru", type=str,
                        choices=['e6', 'e621', 'e9', 'e926', 'hh', 'hypno', 'hypnohub', 'db', 'dan', 'danbooru', 'kc',
                                 'konac', 'kcom', 'kn', 'konan', 'knet', 'yd', 'yand', 'yandere', 'gb', 'gel',
                                 'gelbooru',
                                 'r34', 'rule34', 'sb', 'safe', 'safebooru', 'tb', 'tbib', 'big', 'xb', 'xbooru', 'pa',
                                 'paheal', 'dp', 'derp', 'derpi', 'derpibooru', 'rb', 'realbooru'],
                        help="Booru to search. For context, this command uses this library"
                             " -> https://github.com/AtoraSuunva/booru"
                        )

    parser.add_argument("--tags", "-t",
                        dest="tags", type=str, help="Tags, comma separated. If query contains tags with spaces, "
                                                    "e.g. 'downvote bait', put it in quotes.")

    parser.add_argument("--random", "-r",
                        dest="random", action='store_true', default=False,
                        help="Randomize the output, default=False")

    parser.add_argument("--limit", "-l",
                        dest="limit", type=int, default=20, help="Limit the number of output posts, default=20")

    parser.add_argument("--spoiler", "-s", dest="spoiler",
                        action="store_true", help="Send the image with a spoiler.")

    return parser


def parse_args(args: str, parser: CustomArgParser):
    args = parser.parse_args(shlex.split(args)).__dict__

    args["tags"] = args["tags"].split(",")

    return args