"""# Automatic Crypto Seller.

Description TODO.
"""

__all__ = ['__version__', 'run_auto_sell']

import datetime
import dataclasses
import random
from typing import Any
import logging
from decimal import Decimal
import time


import fin_defs

from ._version import __version__

logger = logging.getLogger(__name__)
logger.setLevel('INFO')

@dataclasses.dataclass
class AutoSellConfig:
    sell_amount_range: tuple[Decimal, Decimal]
    sell_interval_range: tuple[datetime.timedelta, datetime.timedelta]
    token_input: fin_defs.Asset
    token_output: fin_defs.Asset
    exit_when_empty: bool = True

def sample_from_range(rng: random.Random, range: tuple[Any, Any]) -> Any:
    multiplier = rng.random()
    if isinstance(range[0], Decimal):
        multiplier = Decimal(multiplier)
    return range[0] + (range[1] - range[0]) * multiplier

def determine_available_tokens(token: fin_defs.Asset) -> Decimal:
    # TODO
    return Decimal(10000)

def sell_tokens(token_input: fin_defs.Asset, tokens_to_sell: Decimal, token_output: fin_defs.Asset):
    pass

def run_auto_sell(config: AutoSellConfig):
    rng = random.SystemRandom()

    while True:
        # Check that account has tokens.
        num_tokens_available = determine_available_tokens(config.token_input)
        logger.info('Currently own %s %s', num_tokens_available, config.token_input)

        if num_tokens_available > 0:
            tokens_to_sell = sample_from_range(rng, config.sell_amount_range)
            tokens_to_sell = min(num_tokens_available, tokens_to_sell)
            logger.info('Attempting to sell %s %s', tokens_to_sell, config.token_input)

            sell_tokens(config.token_input, tokens_to_sell, config.token_output)

            del tokens_to_sell
        elif config.exit_when_empty:
            break

        # Time out
        time_to_sleep = sample_from_range(rng, config.sell_interval_range)
        time_to_sleep_secs = time_to_sleep.total_seconds()
        logger.info('Sleeping %s (%d seconds)', time_to_sleep, time_to_sleep_secs)
        time.sleep(time_to_sleep_secs)

        del num_tokens_available