# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

"""Fake objects to ease testing of cubicweb without a fully working environment

"""

__docformat__ = "restructuredtext en"

from logilab.database import get_db_helper

from cubicweb.req import RequestSessionBase

from cubicweb.cwvreg import CubicWebVRegistry

from cubicweb.web.request import CubicWebRequestBase

from cubicweb.web.http_headers import Headers

from cubicweb.devtools import BASE_URL, BaseApptestConfiguration

class FakeConfig(dict, BaseApptestConfiguration):

    translations = {}

    uiprops = {}

    apphome = None

    def __init__(self, appid='data', apphome=None, cubes=()):

        self.appid = appid

        self.apphome = apphome

        self._cubes = cubes

        self['auth-mode'] = 'cookie'

        self['uid'] = None

        self['base-url'] = BASE_URL

        self['rql-cache-size'] = 100

        self.datadir_url = BASE_URL + 'data/'

    def cubes(self, expand=False):

        return self._cubes

    def sources(self):

        return {'system': {'db-driver': 'sqlite'}}

class FakeRequest(CubicWebRequestBase):

    """test implementation of an cubicweb request object"""

    def __init__(self, *args, **kwargs):

        if not (args or 'vreg' in kwargs):

            kwargs['vreg'] = CubicWebVRegistry(FakeConfig(), initlog=False)

        kwargs['https'] = False

        self._url = kwargs.pop('url', None) or 'view?rql=Blop&vid=blop'

        super(FakeRequest, self).__init__(*args, **kwargs)

        self._session_data = {}

        self._headers_in = Headers()

    def set_cookie(self, name, value, maxage=300, expires=None, secure=False):

        super(FakeRequest, self).set_cookie(name, value, maxage, expires, secure)

        cookie = self.get_response_header('Set-Cookie')

        self._headers_in.setHeader('Cookie', cookie)

    ## Implement request abstract API

    def header_accept_language(self):

        """returns an ordered list of preferred languages"""

        return ('en',)

    def header_if_modified_since(self):

        return None

    def relative_path(self, includeparams=True):

        """return the normalized path of the request (ie at least relative

        to the instance's root, but some other normalization may be needed

        so that the returned path may be used to compare to generated urls

        """

        if self._url.startswith(BASE_URL):

            url = self._url[len(BASE_URL):]

        else:

            url = self._url

        if includeparams:

            return url

        return url.split('?', 1)[0]

    def get_header(self, header, default=None, raw=True):

        """return the value associated with the given input header, raise

        KeyError if the header is not set

        """

        if raw:

            return self._headers_in.getRawHeaders(header, [default])[0]

        return self._headers_in.getHeader(header, default)

    ## extend request API to control headers in / out values

    def set_request_header(self, header, value, raw=False):

        """set an input HTTP header"""

        if isinstance(value, basestring):

            value = [value]

        if raw:

            self._headers_in.setRawHeaders(header, value)

        else:

            self._headers_in.setHeader(header, value)

    def get_response_header(self, header, default=None, raw=False):

        """return the value associated with the given input header,

        raise KeyError if the header is not set

        """

        if raw:

            return self.headers_out.getRawHeaders(header, default)[0]

        else:

            return self.headers_out.getHeader(header, default)

    def validate_cache(self):

        pass

    def build_url_params(self, **kwargs):

        # overriden to get predictable resultts

        args = []

        for param, values in sorted(kwargs.iteritems()):

            if not isinstance(values, (list, tuple)):

                values = (values,)

            for value in values:

                assert value is not None

                args.append(u'%s=%s' % (param, self.url_quote(value)))

        return '&'.join(args)

class FakeUser(object):

    login = 'toto'

    eid = 0

    def in_groups(self, groups):

        return True

class FakeSession(RequestSessionBase):

    def __init__(self, repo=None, user=None, vreg=None):

        self.repo = repo

        if vreg is None:

            vreg = getattr(self.repo, 'vreg', None)

        if vreg is None:

            vreg = CubicWebVRegistry(FakeConfig(), initlog=False)

        self.vreg = vreg

        self.cnxset = FakeConnectionsSet()

        self.user = user or FakeUser()

        self.is_internal_session = False

        self.transaction_data = {}

    def execute(self, *args, **kwargs):

        pass

    def commit(self, *args):

        self.transaction_data.clear()

    def close(self, *args):

        pass

    def system_sql(self, sql, args=None):

        pass

    def set_entity_cache(self, entity):

        pass

    # for use with enabled_security context manager

    read_security = write_security = True

    def init_security(self, *args):

        return None, None

    def reset_security(self, *args):

        return

class FakeRepo(object):

    querier = None

    def __init__(self, schema, vreg=None, config=None):

        self.extids = {}

        self.eids = {}

        self._count = 0

        self.schema = schema

        self.config = config or FakeConfig()

        self.vreg = vreg or CubicWebVRegistry(self.config, initlog=False)

        self.vreg.schema = schema

        self.sources = []

    def internal_session(self):

        return FakeSession(self)

    def extid2eid(self, source, extid, etype, session, insert=True):

        try:

            return self.extids[extid]

        except KeyError:

            if not insert:

                return None

            self._count += 1

            eid = self._count

            entity = source.before_entity_insertion(session, extid, etype, eid)

            self.extids[extid] = eid

            self.eids[eid] = extid

            source.after_entity_insertion(session, extid, entity)

            return eid

    def eid2extid(self, source, eid, session=None):

        return self.eids[eid]

class FakeSource(object):

    dbhelper = get_db_helper('sqlite')

    def __init__(self, uri):

        self.uri = uri

class FakeConnectionsSet(object):

    def source(self, uri):

        return FakeSource(uri)