# -*- coding: utf-8 -*-
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import datetime
import logging
import os
import pytest
import re
import tempfile
import time

import pylons
from pylons import config, url
from pylons.i18n.translation import _get_translator
from pylons.util import ContextObj
from routes.util import URLGenerator
from webtest import TestApp

from kallithea import is_windows
from kallithea.model.db import Notification, User, UserNotification
from kallithea.model.meta import Session
from kallithea.lib.utils2 import safe_str

os.environ['TZ'] = 'UTC'
if not is_windows:
    time.tzset()

log = logging.getLogger(__name__)

skipif = pytest.mark.skipif
parametrize = pytest.mark.parametrize

__all__ = [
    'skipif', 'parametrize', 'environ', 'url', 'TestController',
    'ldap_lib_installed', 'pam_lib_installed', 'invalidate_all_caches',
    'TESTS_TMP_PATH', 'HG_REPO', 'GIT_REPO', 'NEW_HG_REPO', 'NEW_GIT_REPO',
    'HG_FORK', 'GIT_FORK', 'TEST_USER_ADMIN_LOGIN', 'TEST_USER_ADMIN_PASS',
    'TEST_USER_ADMIN_EMAIL', 'TEST_USER_REGULAR_LOGIN', 'TEST_USER_REGULAR_PASS',
    'TEST_USER_REGULAR_EMAIL', 'TEST_USER_REGULAR2_LOGIN',
    'TEST_USER_REGULAR2_PASS', 'TEST_USER_REGULAR2_EMAIL', 'TEST_HG_REPO',
    'TEST_HG_REPO_CLONE', 'TEST_HG_REPO_PULL', 'TEST_GIT_REPO',
    'TEST_GIT_REPO_CLONE', 'TEST_GIT_REPO_PULL', 'HG_REMOTE_REPO',
    'GIT_REMOTE_REPO', 'SCM_TESTS',
]

# Invoke websetup with the current config file
# SetupCommand('setup-app').run([config_file])

environ = {}

#SOME GLOBALS FOR TESTS

TESTS_TMP_PATH = os.path.join(tempfile.gettempdir(), 'rc_test_%s' % tempfile._RandomNameSequence().next())
TEST_USER_ADMIN_LOGIN = 'test_admin'
TEST_USER_ADMIN_PASS = 'test12'
TEST_USER_ADMIN_EMAIL = 'test_admin@example.com'

TEST_USER_REGULAR_LOGIN = 'test_regular'
TEST_USER_REGULAR_PASS = 'test12'
TEST_USER_REGULAR_EMAIL = 'test_regular@example.com'

TEST_USER_REGULAR2_LOGIN = 'test_regular2'
TEST_USER_REGULAR2_PASS = 'test12'
TEST_USER_REGULAR2_EMAIL = 'test_regular2@example.com'

HG_REPO = u'vcs_test_hg'
GIT_REPO = u'vcs_test_git'

NEW_HG_REPO = u'vcs_test_hg_new'
NEW_GIT_REPO = u'vcs_test_git_new'

HG_FORK = u'vcs_test_hg_fork'
GIT_FORK = u'vcs_test_git_fork'

## VCS
SCM_TESTS = ['hg', 'git']
uniq_suffix = str(int(time.mktime(datetime.datetime.now().timetuple())))

GIT_REMOTE_REPO = 'git://github.com/codeinn/vcs.git'

TEST_GIT_REPO = os.path.join(TESTS_TMP_PATH, GIT_REPO)
TEST_GIT_REPO_CLONE = os.path.join(TESTS_TMP_PATH, 'vcsgitclone%s' % uniq_suffix)
TEST_GIT_REPO_PULL = os.path.join(TESTS_TMP_PATH, 'vcsgitpull%s' % uniq_suffix)


HG_REMOTE_REPO = 'http://bitbucket.org/marcinkuzminski/vcs'

TEST_HG_REPO = os.path.join(TESTS_TMP_PATH, HG_REPO)
TEST_HG_REPO_CLONE = os.path.join(TESTS_TMP_PATH, 'vcshgclone%s' % uniq_suffix)
TEST_HG_REPO_PULL = os.path.join(TESTS_TMP_PATH, 'vcshgpull%s' % uniq_suffix)

TEST_DIR = tempfile.gettempdir()
TEST_REPO_PREFIX = 'vcs-test'

# cached repos if any !
# comment out to get some other repos from bb or github
GIT_REMOTE_REPO = os.path.join(TESTS_TMP_PATH, GIT_REPO)
HG_REMOTE_REPO = os.path.join(TESTS_TMP_PATH, HG_REPO)

#skip ldap tests if LDAP lib is not installed
ldap_lib_installed = False
try:
    import ldap
    ldap.API_VERSION
    ldap_lib_installed = True
except ImportError:
    # means that python-ldap is not installed
    pass

try:
    import pam
    pam.PAM_TEXT_INFO
    pam_lib_installed = True
except ImportError:
    pam_lib_installed = False

def invalidate_all_caches():
    """Invalidate all beaker caches currently configured.
    Useful when manipulating IP permissions in a test and changes need to take
    effect immediately.
    Note: Any use of this function is probably a workaround - it should be
    replaced with a more specific cache invalidation in code or test."""
    from beaker.cache import cache_managers
    for cache in cache_managers.values():
        cache.clear()

class NullHandler(logging.Handler):
    def emit(self, record):
        pass

class TestController(object):
    """Pytest-style test controller"""

    # Note: pytest base classes cannot have an __init__ method

    @pytest.fixture(autouse=True)
    def app_fixture(self):
        self.wsgiapp = pylons.test.pylonsapp
        self.init_stack(self.wsgiapp.config)
        self.app = TestApp(self.wsgiapp)
        self.maxDiff = None
        self.index_location = config['app_conf']['index_dir']
        return self.app

    def init_stack(self, config=None):
        if not config:
            config = pylons.test.pylonsapp.config
        url._push_object(URLGenerator(config['routes.map'], environ))
        pylons.app_globals._push_object(config['pylons.app_globals'])
        pylons.config._push_object(config)
        pylons.tmpl_context._push_object(ContextObj())
        # Initialize a translator for tests that utilize i18n
        translator = _get_translator(pylons.config.get('lang'))
        pylons.translator._push_object(translator)
        h = NullHandler()
        logging.getLogger("kallithea").addHandler(h)

    def remove_all_notifications(self):
        # query().delete() does not (by default) trigger cascades
        # ( http://docs.sqlalchemy.org/en/rel_0_7/orm/collections.html#passive-deletes )
        # so delete the UserNotification first to ensure referential integrity.
        UserNotification.query().delete()

        Notification.query().delete()
        Session().commit()

    def log_user(self, username=TEST_USER_ADMIN_LOGIN,
                 password=TEST_USER_ADMIN_PASS):
        self._logged_username = username
        response = self.app.post(url(controller='login', action='index'),
                                 {'username': username,
                                  'password': password})

        if 'Invalid username or password' in response.body:
            pytest.fail('could not login using %s %s' % (username, password))

        assert response.status == '302 Found'
        self.assert_authenticated_user(response, username)

        response = response.follow()
        return response.session['authuser']

    def _get_logged_user(self):
        return User.get_by_username(self._logged_username)

    def assert_authenticated_user(self, response, expected_username):
        cookie = response.session.get('authuser')
        user = cookie and cookie.get('user_id')
        user = user and User.get(user)
        user = user and user.username
        assert user == expected_username

    def authentication_token(self):
        return self.app.get(url('authentication_token')).body

    def checkSessionFlash(self, response, msg=None, skip=0, _matcher=lambda msg, m: msg in m):
        if 'flash' not in response.session:
            pytest.fail(safe_str(u'msg `%s` not found - session has no flash:\n%s' % (msg, response)))
        try:
            level, m = response.session['flash'][-1 - skip]
            if _matcher(msg, m):
                return
        except IndexError:
            pass
        pytest.fail(safe_str(u'msg `%s` not found in session flash (skipping %s): %s' %
                           (msg, skip,
                            ', '.join('`%s`' % m for level, m in response.session['flash']))))

    def checkSessionFlashRegex(self, response, regex, skip=0):
        self.checkSessionFlash(response, regex, skip=skip, _matcher=re.search)