import argparse
import datetime
import logging
import logging.handlers
import time
from decimal import Decimal
from pathlib import Path

import fin_defs
import fin_depo

from . import (
    AutoSellConfig,
    config,
    log_results,
    order_csv,
    run_auto_sell,
)
from . import logger as module_logger

logger = logging.getLogger(__name__)

################################################################################
# Constants #

PATH_OUTPUT = Path('./output').absolute()
PATH_LOG_FILE = PATH_OUTPUT / 'log.txt'
PATH_TRADES_FILE = PATH_OUTPUT / 'trades.csv'

################################################################################
# Application Setup #

def setup_logging():
    """Enables logging for the terminal and to a log file."""
    PATH_LOG_FILE.parent.mkdir(parents=True, exist_ok=True)
    file_handler = logging.handlers.WatchedFileHandler(filename=PATH_LOG_FILE)
    file_handler.setFormatter(
        logging.Formatter(
            '%(levelname)s:%(asctime)s: %(message)s',
            datefmt='%Y-%m-%d %H:%M:%S',
        ),
    )

    logging.basicConfig(handlers=[logging.StreamHandler(), file_handler])

    logger.setLevel('INFO')
    module_logger.setLevel('INFO')


CLI_DESCRIPTION = """
Sells financial assets from an online account.
""".strip()


def parse_args():
    parser = argparse.ArgumentParser('crypto_seller', description=CLI_DESCRIPTION)
    return parser.parse_args()


def main():
    """Initializes the program."""
    setup_logging()

    args = parse_args()

    logger.info('Initializing crypto_seller')

    seller_backend = fin_depo.defi_kucoin.KucoinDepoFetcher(
        kucoin_secret=config.KUCOIN_SECRET,
        kucoin_key=config.KUCOIN_KEY,
        kucoin_pass=config.KUCOIN_PASS,
    )

    auto_sell_config = AutoSellConfig(
        input_amount_range=(Decimal('0.5'), Decimal('1')),
        interval_range=(datetime.timedelta(seconds=2), datetime.timedelta(seconds=6)),
        input_asset=fin_defs.MPC,
        output_asset=fin_defs.USDT,
        exit_when_empty=True,
        seller=seller_backend,
        sleep=time.sleep,
        log_order_to_csv=order_csv.CsvFileLogger(PATH_TRADES_FILE),
    )
    results = run_auto_sell(auto_sell_config)
    logging.info('Sell-offs complete')
    log_results(results)


if __name__ == '__main__':
    main()