import os
import asyncio
import logging
from argparse import Namespace

from .manga_translator import (
    MangaTranslator,
    MangaTranslatorWeb,
    MangaTranslatorWS,
    MangaTranslatorAPI,
    set_main_logger,
)
from .args import parser
from .utils import (
    BASE_PATH,
    init_logging,
    get_logger,
    set_log_level,
    natural_sort,
)

# TODO: Dynamic imports to reduce ram usage in web(-server) mode. Will require dealing with args.py imports.

async def dispatch(args: Namespace):
    args_dict = vars(args)

    logger.info(f'Running in {args.mode} mode')

    if args.mode in ('demo', 'batch'):
        if not args.input:
            raise Exception('No input image was supplied. Use -i <image_path>')
        translator = MangaTranslator(args_dict)
        if args.mode == 'demo':
            if len(args.input) != 1 or not os.path.isfile(args.input[0]):
                raise FileNotFoundError(f'Invalid single image file path for demo mode: "{" ".join(args.input)}". Use `-m batch`.')
            dest = os.path.join(BASE_PATH, 'result/final.png')
            args.overwrite = True # Do overwrite result/final.png file
            await translator.translate_path(args.input[0], dest, args_dict)
        else: # batch
            dest = args.dest
            for path in natural_sort(args.input):
                await translator.translate_path(path, dest, args_dict)

    elif args.mode == 'web':
        from .server.web_main import dispatch
        await dispatch(args.host, args.port, translation_params=args_dict)

    elif args.mode == 'web_client':
        translator = MangaTranslatorWeb(args_dict)
        await translator.listen(args_dict)

    elif args.mode == 'ws':
        translator = MangaTranslatorWS(args_dict)
        await translator.listen(args_dict)

    elif args.mode == 'api':
        translator = MangaTranslatorAPI(args_dict)
        await translator.listen(args_dict)

if __name__ == '__main__':
    args = None
    init_logging()
    try:
        args = parser.parse_args()
        set_log_level(level=logging.DEBUG if args.verbose else logging.INFO)
        logger = get_logger(args.mode)
        set_main_logger(logger)
        if args.mode != 'web':
            logger.debug(args)

        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
        loop.run_until_complete(dispatch(args))
    except KeyboardInterrupt:
        if not args or args.mode != 'web':
            print()
    except Exception as e:
        logger.error(f'{e.__class__.__name__}: {e}',
                     exc_info=e if args and args.verbose else None)