import contextlib
import logging
import sys
from argparse import ArgumentParser
from logging import Logger
from pathlib import Path

from discord import LoginFailure, Intents
from libbot.utils import config_get

from classes.holo_bot import HoloBot
from modules.migrator import migrate_database
from modules.scheduler import scheduler

logging.basicConfig(
    level=logging.INFO,
    format="%(name)s.%(funcName)s | %(levelname)s | %(message)s",
    datefmt="[%X]",
)

logger: Logger = logging.getLogger(__name__)

# Declare the parser that retrieves the command line arguments
parser = ArgumentParser(
    prog="HoloUA Discord",
    description="Discord bot for the HoloUA community.",
)

# Add a switch argument --migrate to be parsed...
parser.add_argument("--migrate", action="store_true")

# ...and parse the arguments we added
args = parser.parse_args()

# Try to import the module that improves performance
# and ignore errors when module is not installed
with contextlib.suppress(ImportError):
    import uvloop

    uvloop.install()


def main() -> None:
    if not Path("config.json").exists():
        logger.error(
            "Config file is missing: Make sure the configuration file 'config.json' is in place."
        )
        sys.exit()

    # Perform migration if command line argument was provided
    if args.migrate:
        logger.info("Performing migrations...")
        migrate_database()

    intents: Intents = Intents().all()
    client: HoloBot = HoloBot(intents=intents, scheduler=scheduler)

    client.load_extension("cogs")

    try:
        client.run(config_get("bot_token", "bot"))
    except LoginFailure as exc:
        logger.error("Provided bot token is invalid: %s", exc)
    except KeyboardInterrupt:
        logger.info("KeyboardInterrupt received: Shutting down gracefully.")
    finally:
        sys.exit()


if __name__ == "__main__":
    main()