import logging

logger = logging.getLogger(__name__)

MAX_NOTIFICATIONS_COUNT = 5


class Handler:
    def __init__(self, pool_name, exchange_rate=None, currency=None, notifier=None):
        self.pool_name = pool_name
        self.exchange_rate = exchange_rate
        self.currency = currency
        self.notifier = notifier

    def _watch_miner_balance(self, miner, last_balance=None):
        logger.debug('watching miner balance')
        if miner.raw_balance != last_balance:
            logger.info('miner balance has changed')
            if self.notifier:
                logger.debug('sending balance notification')
                arguments = {'pool': self.pool_name, 'address': miner.address, 'url': miner.url,
                             'balance': miner.balance, 'balance_fiat': miner.balance_fiat,
                             'balance_percentage': miner.balance_percentage}
                try:
                    self.notifier.notify_balance(**arguments)
                    logger.info('balance notification sent')
                except Exception as err:
                    logger.error('failed to send notification')
                    logger.exception(err)
        return miner.raw_balance

    def _watch_miner_payments(self, miner, last_transaction=None):
        logger.debug('watching miner payments')
        if miner.last_transaction and (not last_transaction or miner.last_transaction.txid != last_transaction):
            # send notifications for last payment only
            logger.info(f'new payment {miner.last_transaction.txid}')
            if self.notifier:
                logger.debug('sending payment notification')
                arguments = {'pool': self.pool_name, 'address': miner.address, 'txid': miner.last_transaction.txid,
                             'amount': miner.last_transaction.amount, 'amount_fiat': miner.last_transaction.amount_fiat,
                             'time': miner.last_transaction.time, 'duration': miner.last_transaction.duration}
                try:
                    self.notifier.notify_payment(**arguments)
                    logger.info('payment notification sent')
                except Exception as err:
                    logger.error('failed to send notification')
                    logger.exception(err)
        if miner.last_transaction and miner.last_transaction.txid:
            return miner.last_transaction.txid