import tempfile
import os
import re
import shutil
import cStringIO
from contextlib import contextmanager
from libpathod import utils, test, pathoc, pathod, language
import requests


class DaemonTests(object):
    noweb = False
    noapi = False
    nohang = False
    ssl = False
    timeout = None
    hexdump = False
    ssloptions = None

    @classmethod
    def setUpAll(klass):
        opts = klass.ssloptions or {}
        klass.confdir = tempfile.mkdtemp()
        opts["confdir"] = klass.confdir
        so = pathod.SSLOptions(**opts)
        klass.d = test.Daemon(
            staticdir=test_data.path("data"),
            anchors=[
                (re.compile("/anchor/.*"), language.parse_response("202:da"))
            ],
            ssl = klass.ssl,
            ssloptions = so,
            sizelimit = 1 * 1024 * 1024,
            noweb = klass.noweb,
            noapi = klass.noapi,
            nohang = klass.nohang,
            timeout = klass.timeout,
            hexdump = klass.hexdump,
            logreq = True,
            logresp = True,
            explain = True
        )

    @classmethod
    def tearDownAll(self):
        self.d.shutdown()
        shutil.rmtree(self.confdir)

    def setUp(self):
        if not (self.noweb or self.noapi):
            self.d.clear_log()

    def getpath(self, path, params=None):
        scheme = "https" if self.ssl else "http"
        return requests.get(
            "%s://localhost:%s/%s" % (
                scheme,
                self.d.port,
                path
            ),
            verify=False,
            params=params
        )

    def get(self, spec):
        return requests.get(self.d.p(spec), verify=False)

    def pathoc(
        self,
        spec,
        timeout=None,
        connect_to=None,
        ssl=None,
        ws_read_limit=None
    ):
        if ssl is None:
            ssl = self.ssl
        c = pathoc.Pathoc(
            ("localhost", self.d.port),
            ssl=ssl,
            ws_read_limit=ws_read_limit,
            fp = None
        )
        c.connect(connect_to)
        if timeout:
            c.settimeout(timeout)
        return c.request(spec)


@contextmanager
def tmpdir(*args, **kwargs):
    orig_workdir = os.getcwd()
    temp_workdir = tempfile.mkdtemp(*args, **kwargs)
    os.chdir(temp_workdir)

    yield temp_workdir

    os.chdir(orig_workdir)
    shutil.rmtree(temp_workdir)


def raises(exc, obj, *args, **kwargs):
    """
        Assert that a callable raises a specified exception.

        :exc An exception class or a string. If a class, assert that an
        exception of this type is raised. If a string, assert that the string
        occurs in the string representation of the exception, based on a
        case-insenstivie match.

        :obj A callable object.

        :args Arguments to be passsed to the callable.

        :kwargs Arguments to be passed to the callable.
    """
    try:
        obj(*args, **kwargs)
    except (Exception, SystemExit) as v:
        if isinstance(exc, basestring):
            if exc.lower() in str(v).lower():
                return
            else:
                raise AssertionError(
                    "Expected %s, but caught %s" % (
                        repr(str(exc)), v
                    )
                )
        else:
            if isinstance(v, exc):
                return
            else:
                raise AssertionError(
                    "Expected %s, but caught %s %s" % (
                        exc.__name__, v.__class__.__name__, str(v)
                    )
                )
    raise AssertionError("No exception raised.")

test_data = utils.Data(__name__)


def render(r, settings=language.Settings()):
    r = r.resolve(settings)
    s = cStringIO.StringIO()
    assert language.serve(r, s, settings)
    return s.getvalue()