import logging
import tarfile
import cStringIO

from flask import request, make_response

from data.database import configure

from config_app.c_app import app, config_provider
from config_app.config_endpoints.api import resource, ApiResource, nickname, validate_json_request

logger = logging.getLogger(__name__)

@resource('/v1/configapp/tarconfig')
class TarConfigLoader(ApiResource):
    """ Resource for validating a block of configuration against an external service. """

    @nickname('uploadTarballConfig')
    def post(self):
        """ Loads tarball config into the config provider """
        input_stream = request.stream

        # since we're working with a tar file, shouldn't be larger than ~20KB, so just read the whole thing into mem
        buf = input_stream.read()
        config = tarfile.open(mode="r:gz", fileobj=cStringIO.StringIO(buf))

        # TODO(sam): refactor config provider to accept a stream write to avoid loading into memory
        config_provider.load_from_tarball(config)

        # now try to connect to the db provided in their config
        combined = dict(**app.config)
        combined.update(config_provider.get_config())

        configure(combined)

        return make_response('OK')