#!/usr/bin/env python


from pytest import fixture


from os import path
from io import BytesIO


from circuits.web import Controller
from circuits.web.tools import gzip
from circuits import handler, Component


from .conftest import DOCROOT
from .helpers import build_opener, Request


class Gzip(Component):

    channel = "web"

    @handler("response", priority=1.0)
    def _on_response(self, event, *args, **kwargs):
        event[0] = gzip(event[0])


class Root(Controller):

    def index(self):
        return "Hello World!"


@fixture(scope="module")
def gziptool(request, webapp):
    gziptool = Gzip().register(webapp)

    def finalizer():
        gziptool.unregister()

    request.addfinalizer(finalizer)

    return gziptool


def decompress(body):
    import gzip

    zbuf = BytesIO()
    zbuf.write(body)
    zbuf.seek(0)
    zfile = gzip.GzipFile(mode='rb', fileobj=zbuf)
    data = zfile.read()
    zfile.close()
    return data


def test1(webapp, gziptool):
    request = Request(webapp.server.http.base)
    request.add_header("Accept-Encoding", "gzip")
    opener = build_opener()

    f = opener.open(request)
    s = decompress(f.read())
    assert s == b"Hello World!"


def test2(webapp, gziptool):
    request = Request("%s/static/largefile.txt" % webapp.server.http.base)
    request.add_header("Accept-Encoding", "gzip")
    opener = build_opener()

    f = opener.open(request)
    s = decompress(f.read())
    assert s == open(path.join(DOCROOT, "largefile.txt"), "rb").read()