# Twisted/Klein imports
from twisted.logger import Logger

# Other library imports
from json import dumps

# Project imports
from db import r


def convert(data):
    """
    Recursively convert a dictionary.
    """
    if isinstance(data, bytes):
        return data.decode("ascii")
    if isinstance(data, dict):
        return dict(map(convert, data.items()))
    if isinstance(data, tuple):
        return map(convert, data)
    return data


class Transactions(object):
    """
    Handler class for incoming Revolut transactions.
    """

    def __init__(self):
        """
        Initialise the Transaction object.
        Set the logger.
        """
        self.log = Logger("transactions")

    def set_agora(self, agora):
        self.agora = agora

    def set_irc(self, irc):
        self.irc = irc

    def transaction(self, data):
        """
        Store details of transaction.
        :param data: details of transaction
        :type data: dict
        """
        event = data["event"]
        ts = data["timestamp"]

        inside = data["data"]
        txid = inside["id"]
        txtype = inside["type"]
        state = inside["state"]
        reference = inside["reference"]

        leg = inside["legs"][0]

        account_type = leg["counterparty"]["account_type"]

        amount = leg["amount"]
        currency = leg["currency"]
        description = leg["description"]

        to_store = {
            "event": event,
            "ts": ts,
            "txid": txid,
            "txtype": txtype,
            "state": state,
            "reference": reference,
            "account_type": account_type,
            "amount": amount,
            "currency": currency,
            "description": description,
        }

        self.log.info("Transaction processed: {formatted}", formatted=dumps(to_store, indent=2))
        r.hmset(f"tx.{txid}", to_store)
        self.irc.client.msg(
            self.irc.client.channel, f"AUTO Incoming transaction: {amount}{currency} ({reference}) - {state} - {description}"
        )

    def find_tx(self, reference, amount):
        """
        Find transactions that match the given reference and amount.
        :param reference: transaction reference in Revolut
        :param amount: transaction amount
        :type reference: string
        :type amount: int
        :return: transaction details or AMOUNT_INVALID, or False
        :rtype: dict or string or bool
        """
        all_transactions = r.scan(0, match="tx.*")
        for tx_iter in all_transactions[1]:
            tx_obj = r.hgetall(tx_iter)
            if tx_obj[b"reference"] == str.encode(reference):
                if tx_obj[b"amount"] == str.encode(amount):
                    return convert(tx_obj)
                else:
                    return "AMOUNT_INVALID"
        return False