# -*- coding: utf-8 -*-
import requests
from docopt import Dict
from irc3.plugins.command import command
from irc3.utils import IrcString

from . import Plugin

def __currency(name=None, prefix=None, suffix=None):
    return lambda value:
        return '{prefix}{value:,.2f}{suffix}'.format(
                prefix=prefix or '',
                suffix=suffix or (' ' + name if name else ''),
                value=value)

class Coins(Plugin):
    API_URL = 'https://api.cryptowat.ch/markets/{market}/{crypto}{currency}/summary'
    CURRENCIES = {
        'usd': __currency(prefix='$'),
        'eur': __currency(suffix='€'),
        'eth': __currency(suffix='Ξ'),
        'btc': __currency(suffix='฿'),
        'xmr': __currency(name='xmr'),
    }

    @command
    def btc(self, mask: IrcString, target: IrcString, args: Dict):
        """Gets the Bitcoin values from cryptowatch.

        %%btc [<currency>]
        """
        return self.cryptowat_summary('btc', 'coinbase', args)
        
    @command
    def eth(self, mask: IrcString, target: IrcString, args: Dict):
        """Gets the Ethereum values from cryptowatch.

        %%eth [<currency>]
        """
        return self.cryptowat_summary('eth', 'coinbase', args)
        
    @command
    def xmr(self, mask: IrcString, target: IrcString, args: Dict):
        """Gets the Monero values from cryptowatch.

        %%xmr [<currency>]
        """
        return self.cryptowat_summary('xmr', 'bitfinex', args)

    def cryptowat_summary(self, crypto: str, market: str, args: Dict):
        currency = args.get('<currency>', 'eur').lower()

        if currency not in self.CURRENCIES or crypto == currency:
            return '\x02[{}]\x02 Can\'t convert or invalid currency: {}'.format(crypto.upper(), currency)

        currency = self.CURRENCIES[currency]

        data = requests.get(self.API_URL.format(crypto=crypto, market=market, currency=currency))
        if not data:
            return '\x02[{}]\x02 No data received'.format(crypto)

        result = data.json()['result']
        return '\x02[{crypto}]\x02 ' \
               'Current: \x02\x0307{last}\x0F - ' \
               'High: \x02\x0303{high}\x0F - ' \
               'Low: \x02\x0304{low}\x0F - ' \
               'Change: \x02\x0307{change:,.2f}%\x0F - ' \
               'Volume: \x02\x0307{volume}\x0F' \
            .format(crypto=crypto.upper(),
                    last=currency(result['price']['last']),
                    high=currency(result['price']['high']),
                    low=currency(result['price']['low']),
                    change=result['price']['change']['percentage'] * 100,
                    volume=result['volume'])