"""Hidden internals for the devtools.apptest module

:organization: Logilab

:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

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

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

import sys, traceback

from logilab.common.pytest import pause_tracing, resume_tracing

import yams.schema

from cubicweb.dbapi import repo_connect, ConnectionProperties, ProgrammingError

from cubicweb.cwvreg import CubicWebVRegistry

from cubicweb.web.application import CubicWebPublisher

from cubicweb.web import Redirect

from cubicweb.devtools import ApptestConfiguration, init_test_database

from cubicweb.devtools.fake import FakeRequest

SYSTEM_ENTITIES = ('CWGroup', 'CWUser',

                   'CWAttribute', 'CWRelation',

                   'CWConstraint', 'CWConstraintType', 'CWProperty',

                   'CWEType', 'CWRType',

                   'Workflow', 'State', 'BaseTransition', 'Transition', 'WorkflowTransition', 'TrInfo', 'SubWorkflowExitPoint',

                   'RQLExpression',

                   )

SYSTEM_RELATIONS = (

    # virtual relation

    'identity',

    # metadata

    'is', 'is_instance_of', 'owned_by', 'created_by', 'specializes',

    # workflow related

    'workflow_of', 'state_of', 'transition_of', 'initial_state', 'allowed_transition',

    'destination_state', 'in_state', 'wf_info_for', 'from_state', 'to_state',

    'condition', 'subworkflow', 'subworkflow_state', 'subworkflow_exit',

    # permission

    'in_group', 'require_group', 'require_permission',

    'read_permission', 'update_permission', 'delete_permission', 'add_permission',

    # eproperty

    'for_user',

    # schema definition

    'relation_type', 'from_entity', 'to_entity',

    'constrained_by', 'cstrtype', 'widget',

    # deducted from other relations

    'primary_email',

                    )

def unprotected_entities(app_schema, strict=False):

    """returned a Set of each non final entity type, excluding CWGroup, and CWUser...

    """

    if strict:

        protected_entities = yams.schema.BASE_TYPES

    else:

        protected_entities = yams.schema.BASE_TYPES.union(set(SYSTEM_ENTITIES))

    entities = set(app_schema.entities())

    return entities - protected_entities

def ignore_relations(*relations):

    global SYSTEM_RELATIONS

    SYSTEM_RELATIONS += relations

class TestEnvironment(object):

    """TestEnvironment defines a context (e.g. a config + a given connection) in

    which the tests are executed

    """

    def __init__(self, appid, reporter=None, verbose=False,

                 configcls=ApptestConfiguration, requestcls=FakeRequest):

        config = configcls(appid)

        self.requestcls = requestcls

        self.cnx = None

        config.db_perms = False

        source = config.sources()['system']

        if verbose:

            print "init test database ..."

        self.vreg = vreg = CubicWebVRegistry(config)

        self.admlogin = source['db-user']

        # restore database <=> init database

        self.restore_database()

        if verbose:

            print "init done"

        config.repository = lambda x=None: self.repo

        self.app = CubicWebPublisher(config, vreg=vreg)

        self.verbose = verbose

        schema = self.vreg.schema

        # else we may run into problems since email address are ususally share in app tests

        # XXX should not be necessary anymore

        self.deletable_entities = unprotected_entities(schema)

    def restore_database(self):

        """called by unittests' tearDown to restore the original database

        """

        try:

            pause_tracing()

            if self.cnx:

                self.cnx.close()

            source = self.vreg.config.sources()['system']

            self.repo, self.cnx = init_test_database(driver=source['db-driver'],

                                                     vreg=self.vreg)

            self._orig_cnx = self.cnx

            resume_tracing()

        except:

            resume_tracing()

            traceback.print_exc()

            sys.exit(1)

        # XXX cnx decoration is usually done by the repository authentication manager,

        # necessary in authentication tests

        self.cnx.vreg = self.vreg

        self.cnx.login = source['db-user']

        self.cnx.password = source['db-password']

    def create_user(self, login, groups=('users',), req=None):

        req = req or self.create_request()

        cursor = self._orig_cnx.cursor(req)

        rset = cursor.execute('INSERT CWUser X: X login %(login)s, X upassword %(passwd)s',

                              {'login': unicode(login), 'passwd': login.encode('utf8')})

        user = rset.get_entity(0, 0)

        cursor.execute('SET X in_group G WHERE X eid %%(x)s, G name IN(%s)'

                       % ','.join(repr(g) for g in groups),

                       {'x': user.eid}, 'x')

        user.clear_related_cache('in_group', 'subject')

        self._orig_cnx.commit()

        return user

    def login(self, login, password=None):

        if login == self.admlogin:

            self.restore_connection()

        else:

            self.cnx = repo_connect(self.repo, unicode(login),

                                    password or str(login),

                                    ConnectionProperties('inmemory'))

        if login == self.vreg.config.anonymous_user()[0]:

            self.cnx.anonymous_connection = True

        return self.cnx

    def restore_connection(self):

        if not self.cnx is self._orig_cnx:

            try:

                self.cnx.close()

            except ProgrammingError:

                pass # already closed

        self.cnx = self._orig_cnx

    ############################################################################

    def execute(self, rql, args=None, eidkey=None, req=None):

        """executes <rql>, builds a resultset, and returns a couple (rset, req)

        where req is a FakeRequest

        """

        req = req or self.create_request(rql=rql)

        return self.cnx.cursor(req).execute(unicode(rql), args, eidkey)

    def create_request(self, rql=None, **kwargs):

        """executes <rql>, builds a resultset, and returns a

        couple (rset, req) where req is a FakeRequest

        """

        if rql:

            kwargs['rql'] = rql

        req = self.requestcls(self.vreg, form=kwargs)

        req.set_connection(self.cnx)

        return req

    def get_rset_and_req(self, rql, optional_args=None, args=None, eidkey=None):

        """executes <rql>, builds a resultset, and returns a

        couple (rset, req) where req is a FakeRequest

        """

        return (self.execute(rql, args, eidkey),

                self.create_request(rql=rql, **optional_args or {}))

class ExistingTestEnvironment(TestEnvironment):

    def __init__(self, appid, sourcefile, verbose=False):

        config = ApptestConfiguration(appid, sourcefile=sourcefile)

        if verbose:

            print "init test database ..."

        source = config.sources()['system']

        self.vreg = CubicWebVRegistry(config)

        self.cnx = init_test_database(driver=source['db-driver'],

                                      vreg=self.vreg)[1]

        if verbose:

            print "init done"

        self.app = CubicWebPublisher(config, vreg=self.vreg)

        self.verbose = verbose

        # this is done when the publisher is opening a connection

        self.cnx.vreg = self.vreg

    def setup(self, config=None):

        """config is passed by TestSuite but is ignored in this environment"""

        cursor = self.cnx.cursor()

        self.last_eid = cursor.execute('Any X WHERE X creation_date D ORDERBY D DESC LIMIT 1').rows[0][0]

    def cleanup(self):

        """cancel inserted elements during tests"""

        cursor = self.cnx.cursor()

        cursor.execute('DELETE Any X WHERE X eid > %(x)s', {'x' : self.last_eid}, eid_key='x')

        print "cleaning done"

        self.cnx.commit()