import asyncio
import aiohttp
import urllib.parse
from threading import Thread

class CatalogsObject(object):
    """
    Master object for all catalog objects.

    Args:
        format (string, optional):
            Defaults to 'json'.
            Returns data in the specified method.
        pretty (string, optional):
            Defaults to empty string.
            Returns a prettier version of the json object.
            Note that this may break functionality with Scrython.
    """
    def __init__(self, _url, **kwargs):
        self.params = {'format': kwargs.get('format', 'json'), 'pretty': kwargs.get('pretty', '')}

        self.encodedParams = urllib.parse.urlencode(self.params)
        self._url = 'https://api.scryfall.com/{0}&{1}'.format(_url, self.encodedParams)

        async def getRequest(client, url, **kwargs):
            async with client.get(url, **kwargs) as response:
                return await response.json()

        async def main(loop):
            async with aiohttp.ClientSession(loop=loop) as client:
                self.scryfallJson = await getRequest(client, self._url)

        def do_everything():
            loop = asyncio.new_event_loop()
            asyncio.set_event_loop(loop)
            loop.run_until_complete(main(loop))

        t = Thread(target=do_everything)
        t.run()

        if self.scryfallJson['object'] == 'error':
            raise Exception(self.scryfallJson['details'])

    def _checkForKey(self, key):
        if not key in self.scryfallJson:
            raise KeyError('This card has no key \'{}\''.format(key))

    def object(self):
        """Returns the type of object it is
        (card, error, etc)
        
        Returns:
            string
        """
        self._checkForKey('object')

        return self.scryfallJson['object']

    def uri(self):
        """The API URI for the endpoint you've called.
        
        Returns:
            string
        """
        self._checkForKey('uri')

        return self.scryfallJson['uri']

    def total_values(self):
        """The number of items in `data()`
        
        Returns:
            integer
        """
        self._checkForKey('total_values')

        return self.scryfallJson['total_values']

    def data(self):
        """A list of all types returned by the endpoint
        
        Returns:
            list
        """
        self._checkForKey('data')

        return self.scryfallJson['data']