# Copyright (C) 2013 Hewlett-Packard Development Company, L.P.
#
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import logging
import os
import shutil
import tempfile
from io import BytesIO
from configobj import ConfigObj
from unittest import mock

from cloudinit import util
from cloudinit.config import cc_locale
from tests.unittests import helpers as t_help

from tests.unittests.util import get_cloud


LOG = logging.getLogger(__name__)


class TestLocale(t_help.FilesystemMockingTestCase):

    def setUp(self):
        super(TestLocale, self).setUp()
        self.new_root = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, self.new_root)
        self.patchUtils(self.new_root)

    def test_set_locale_arch(self):
        locale = 'en_GB.UTF-8'
        locale_configfile = '/etc/invalid-locale-path'
        cfg = {
            'locale': locale,
            'locale_configfile': locale_configfile,
        }
        cc = get_cloud('arch')

        with mock.patch('cloudinit.distros.arch.subp.subp') as m_subp:
            with mock.patch('cloudinit.distros.arch.LOG.warning') as m_LOG:
                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
                m_LOG.assert_called_with('Invalid locale_configfile %s, '
                                         'only supported value is '
                                         '/etc/locale.conf',
                                         locale_configfile)

                contents = util.load_file(cc.distro.locale_gen_fn)
                self.assertIn('%s UTF-8' % locale, contents)
                m_subp.assert_called_with(['localectl',
                                           'set-locale',
                                           locale], capture=False)

    def test_set_locale_sles(self):

        cfg = {
            'locale': 'My.Locale',
        }
        cc = get_cloud('sles')
        cc_locale.handle('cc_locale', cfg, cc, LOG, [])
        if cc.distro.uses_systemd():
            locale_conf = cc.distro.systemd_locale_conf_fn
        else:
            locale_conf = cc.distro.locale_conf_fn
        contents = util.load_file(locale_conf, decode=False)
        n_cfg = ConfigObj(BytesIO(contents))
        if cc.distro.uses_systemd():
            self.assertEqual({'LANG': cfg['locale']}, dict(n_cfg))
        else:
            self.assertEqual({'RC_LANG': cfg['locale']}, dict(n_cfg))

    def test_set_locale_sles_default(self):
        cfg = {}
        cc = get_cloud('sles')
        cc_locale.handle('cc_locale', cfg, cc, LOG, [])

        if cc.distro.uses_systemd():
            locale_conf = cc.distro.systemd_locale_conf_fn
            keyname = 'LANG'
        else:
            locale_conf = cc.distro.locale_conf_fn
            keyname = 'RC_LANG'

        contents = util.load_file(locale_conf, decode=False)
        n_cfg = ConfigObj(BytesIO(contents))
        self.assertEqual({keyname: 'en_US.UTF-8'}, dict(n_cfg))

    def test_locale_update_config_if_different_than_default(self):
        """Test cc_locale writes updates conf if different than default"""
        locale_conf = os.path.join(self.new_root, "etc/default/locale")
        util.write_file(locale_conf, 'LANG="en_US.UTF-8"\n')
        cfg = {'locale': 'C.UTF-8'}
        cc = get_cloud('ubuntu')
        with mock.patch('cloudinit.distros.debian.subp.subp') as m_subp:
            with mock.patch('cloudinit.distros.debian.LOCALE_CONF_FN',
                            locale_conf):
                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
                m_subp.assert_called_with(['update-locale',
                                           '--locale-file=%s' % locale_conf,
                                           'LANG=C.UTF-8'], capture=False)

    def test_locale_rhel_defaults_en_us_utf8(self):
        """Test cc_locale gets en_US.UTF-8 from distro get_locale fallback"""
        cfg = {}
        cc = get_cloud('rhel')
        update_sysconfig = 'cloudinit.distros.rhel_util.update_sysconfig_file'
        with mock.patch.object(cc.distro, 'uses_systemd') as m_use_sd:
            m_use_sd.return_value = True
            with mock.patch(update_sysconfig) as m_update_syscfg:
                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
                m_update_syscfg.assert_called_with('/etc/locale.conf',
                                                   {'LANG': 'en_US.UTF-8'})


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