# 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/>.

"""Test tools for cubicweb"""

__docformat__ = "restructuredtext en"

import os

import sys

import logging

from datetime import timedelta

from os.path import (abspath, join, exists, basename, dirname, normpath, split,

                     isfile, isabs)

from logilab.common.date import strptime

from cubicweb import CW_SOFTWARE_ROOT, ConfigurationError, schema, cwconfig

from cubicweb.server.serverconfig import ServerConfiguration

from cubicweb.etwist.twconfig import TwistedConfiguration

cwconfig.CubicWebConfiguration.cls_adjust_sys_path()

# db auto-population configuration #############################################

# content validation configuration #############################################

# validators are used to validate (XML, DTD, whatever) view's content

# validators availables are :

#  'dtd' : validates XML + declared DTD

#  'xml' : guarantees XML is well formed

#  None : do not try to validate anything

# {'vid': validator}

VIEW_VALIDATORS = {}

# cubicweb test configuration ##################################################

BASE_URL = 'http://testing.fr/cubicweb/'

DEFAULT_SOURCES = {'system': {'adapter' : 'native',

                              'db-encoding' : 'UTF-8', #'ISO-8859-1',

                              'db-user' : u'admin',

                              'db-password' : 'gingkow',

                              'db-name' : 'tmpdb',

                              'db-driver' : 'sqlite',

                              'db-host' : None,

                              },

                   'admin' : {'login': u'admin',

                              'password': u'gingkow',

                              },

                   }

class TestServerConfiguration(ServerConfiguration):

    mode = 'test'

    set_language = False

    read_instance_schema = False

    init_repository = True

    db_require_setup = True

    options = cwconfig.merge_options(ServerConfiguration.options + (

        ('anonymous-user',

         {'type' : 'string',

          'default': None,

          'help': 'login of the CubicWeb user account to use for anonymous user (if you want to allow anonymous)',

          'group': 'main', 'level': 1,

          }),

        ('anonymous-password',

         {'type' : 'string',

          'default': None,

          'help': 'password of the CubicWeb user account matching login',

          'group': 'main', 'level': 1,

          }),

        ))

    def __init__(self, appid, log_threshold=logging.CRITICAL+10):

        ServerConfiguration.__init__(self, appid)

        self.init_log(log_threshold, force=True)

        # need this, usually triggered by cubicweb-ctl

        self.load_cwctl_plugins()

    anonymous_user = TwistedConfiguration.anonymous_user.im_func

    @property

    def apphome(self):

        if exists(self.appid):

            return abspath(self.appid)

        # cube test

        return abspath('..')

    appdatahome = apphome

    def load_configuration(self):

        super(TestServerConfiguration, self).load_configuration()

        self.global_set_option('anonymous-user', 'anon')

        self.global_set_option('anonymous-password', 'anon')

        # no undo support in tests

        self.global_set_option('undo-support', '')

    def main_config_file(self):

        """return instance's control configuration file"""

        return join(self.apphome, '%s.conf' % self.name)

    def instance_md5_version(self):

        return ''

    def bootstrap_cubes(self):

        try:

            super(TestServerConfiguration, self).bootstrap_cubes()

        except IOError:

            # no cubes

            self.init_cubes( () )

    sourcefile = None

    def sources_file(self):

        """define in subclasses self.sourcefile if necessary"""

        if self.sourcefile:

            print 'Reading sources from', self.sourcefile

            sourcefile = self.sourcefile

            if not isabs(sourcefile):

                sourcefile = join(self.apphome, sourcefile)

        else:

            sourcefile = super(TestServerConfiguration, self).sources_file()

        return sourcefile

    def sources(self):

        """By default, we run tests with the sqlite DB backend.  One may use its

        own configuration by just creating a 'sources' file in the test

        directory from wich tests are launched or by specifying an alternative

        sources file using self.sourcefile.

        """

        sources = super(TestServerConfiguration, self).sources()

        if not sources:

            sources = DEFAULT_SOURCES

        return sources

class BaseApptestConfiguration(TestServerConfiguration, TwistedConfiguration):

    repo_method = 'inmemory'

    options = cwconfig.merge_options(TestServerConfiguration.options

                                     + TwistedConfiguration.options)

    cubicweb_appobject_path = TestServerConfiguration.cubicweb_appobject_path | TwistedConfiguration.cubicweb_appobject_path

    cube_appobject_path = TestServerConfiguration.cube_appobject_path | TwistedConfiguration.cube_appobject_path

    def available_languages(self, *args):

        return ('en', 'fr', 'de')

    def default_base_url(self):

        return BASE_URL

    def pyro_enabled(self):

        # but export PYRO_MULTITHREAD=0 or you get problems with sqlite and

        # threads

        return True

class ApptestConfiguration(BaseApptestConfiguration):

    def __init__(self, appid, log_threshold=logging.CRITICAL, sourcefile=None):

        BaseApptestConfiguration.__init__(self, appid, log_threshold=log_threshold)

        self.init_repository = sourcefile is None

        self.sourcefile = sourcefile

class RealDatabaseConfiguration(ApptestConfiguration):

    """configuration class for tests to run on a real database.

    The intialization is done by specifying a source file path.

    Important note: init_test_database / reset_test_database steps are

    skipped. It's thus up to the test developer to implement setUp/tearDown

    accordingly.

    Example usage::

      class MyTests(CubicWebTC):

          _config = RealDatabseConfiguration('myapp',

                                             sourcefile='/path/to/sources')

          def test_something(self):

              rset = self.execute('Any X WHERE X is CWUser')

              self.view('foaf', rset)

    """

    db_require_setup = False    # skip init_db / reset_db steps

    read_instance_schema = True # read schema from database

# test database handling #######################################################

def init_test_database(config=None, configdir='data'):

    """init a test database for a specific driver"""

    from cubicweb.dbapi import in_memory_cnx

    config = config or TestServerConfiguration(configdir)

    sources = config.sources()

    driver = sources['system']['db-driver']

    if config.db_require_setup:

        if driver == 'sqlite':

            init_test_database_sqlite(config)

        elif driver == 'postgres':

            init_test_database_postgres(config)

        else:

            raise ValueError('no initialization function for driver %r' % driver)

    config._cubes = None # avoid assertion error

    repo, cnx = in_memory_cnx(config, unicode(sources['admin']['login']),

                              password=sources['admin']['password'] or 'xxx')

    if driver == 'sqlite':

        install_sqlite_patch(repo.querier)

    return repo, cnx

def reset_test_database(config):

    """init a test database for a specific driver"""

    if not config.db_require_setup:

        return

    driver = config.sources()['system']['db-driver']

    if driver == 'sqlite':

        reset_test_database_sqlite(config)

    elif driver == 'postgres':

        init_test_database_postgres(config)

    else:

        raise ValueError('no reset function for driver %r' % driver)

### postgres test database handling ############################################

def init_test_database_postgres(config):

    """initialize a fresh postgresql databse used for testing purpose"""

    from logilab.database import get_db_helper

    from cubicweb.server import init_repository

    from cubicweb.server.serverctl import (createdb, system_source_cnx,

                                           _db_sys_cnx)

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

    dbname = source['db-name']

    templdbname = dbname + '_template'

    helper = get_db_helper('postgres')

    # connect on the dbms system base to create our base

    dbcnx = _db_sys_cnx(source, 'CREATE DATABASE and / or USER', verbose=0)

    cursor = dbcnx.cursor()

    try:

        if dbname in helper.list_databases(cursor):

            cursor.execute('DROP DATABASE %s' % dbname)

        if not templdbname in helper.list_databases(cursor):

            source['db-name'] = templdbname

            createdb(helper, source, dbcnx, cursor)

            dbcnx.commit()

            cnx = system_source_cnx(source, special_privs='LANGUAGE C', verbose=0)

            templcursor = cnx.cursor()

            # XXX factorize with db-create code

            helper.init_fti_extensions(templcursor)

            # install plpythonu/plpgsql language if not installed by the cube

            langs = sys.platform == 'win32' and ('plpgsql',) or ('plpythonu', 'plpgsql')

            for extlang in langs:

                helper.create_language(templcursor, extlang)

            cnx.commit()

            templcursor.close()

            cnx.close()

            init_repository(config, interactive=False)

            source['db-name'] = dbname

    except:

        dbcnx.rollback()

        # XXX drop template

        raise

    createdb(helper, source, dbcnx, cursor, template=templdbname)

    dbcnx.commit()

    dbcnx.close()

### sqlserver2005 test database handling #######################################

def init_test_database_sqlserver2005(config):

    """initialize a fresh sqlserver databse used for testing purpose"""

    if config.init_repository:

        from cubicweb.server import init_repository

        init_repository(config, interactive=False, drop=True)

### sqlite test database handling ##############################################

def cleanup_sqlite(dbfile, removetemplate=False):

    try:

        os.remove(dbfile)

        os.remove('%s-journal' % dbfile)

    except OSError:

        pass

    if removetemplate:

        try:

            os.remove('%s-template' % dbfile)

        except OSError:

            pass

def reset_test_database_sqlite(config):

    import shutil

    dbfile = config.sources()['system']['db-name']

    cleanup_sqlite(dbfile)

    template = '%s-template' % dbfile

    if exists(template):

        shutil.copy(template, dbfile)

        return True

    return False

def init_test_database_sqlite(config):

    """initialize a fresh sqlite databse used for testing purpose"""

    # remove database file if it exists

    if not reset_test_database_sqlite(config):

        # initialize the database

        import shutil

        from cubicweb.server import init_repository

        init_repository(config, interactive=False)

        dbfile = config.sources()['system']['db-name']

        shutil.copy(dbfile, '%s-template' % dbfile)

def install_sqlite_patch(querier):

    """This patch hotfixes the following sqlite bug :

       - http://www.sqlite.org/cvstrac/tktview?tn=1327,33

       (some dates are returned as strings rather thant date objects)

    """

    if hasattr(querier.__class__, '_devtools_sqlite_patched'):

        return # already monkey patched

    def wrap_execute(base_execute):

        def new_execute(*args, **kwargs):

            rset = base_execute(*args, **kwargs)

            if rset.description:

                found_date = False

                for row, rowdesc in zip(rset, rset.description):

                    for cellindex, (value, vtype) in enumerate(zip(row, rowdesc)):

                        if vtype in ('Date', 'Datetime') and type(value) is unicode:

                            found_date = True

                            value = value.rsplit('.', 1)[0]

                            try:

                                row[cellindex] = strptime(value, '%Y-%m-%d %H:%M:%S')

                            except:

                                row[cellindex] = strptime(value, '%Y-%m-%d')

                        if vtype == 'Time' and type(value) is unicode:

                            found_date = True

                            try:

                                row[cellindex] = strptime(value, '%H:%M:%S')

                            except:

                                # DateTime used as Time?

                                row[cellindex] = strptime(value, '%Y-%m-%d %H:%M:%S')

                        if vtype == 'Interval' and type(value) is int:

                            found_date = True

                            row[cellindex] = timedelta(0, value, 0) # XXX value is in number of seconds?

                    if not found_date:

                        break

            return rset

        return new_execute

    querier.__class__.execute = wrap_execute(querier.__class__.execute)

    querier.__class__._devtools_sqlite_patched = True