# This file is part of cloud-init. See LICENSE file for license information.

import copy
import os


from cloudinit.settings import PER_INSTANCE
from cloudinit import stages
from cloudinit.tests import helpers
from cloudinit import util


class TestSimpleRun(helpers.FilesystemMockingTestCase):

    with_logs = True

    def setUp(self):
        super(TestSimpleRun, self).setUp()
        self.new_root = self.tmp_dir()
        self.replicateTestRoot('simple_ubuntu', self.new_root)

        # Seed cloud.cfg file for our tests
        self.cfg = {
            'datasource_list': ['None'],
            'runcmd': ['ls /etc'],  # test ALL_DISTROS
            'spacewalk': {},  # test non-ubuntu distros module definition
            'system_info': {'paths': {'run_dir': self.new_root}},
            'write_files': [
                {
                    'path': '/etc/blah.ini',
                    'content': 'blah',
                    'permissions': 0o755,
                },
            ],
            'cloud_init_modules': ['write-files', 'spacewalk', 'runcmd'],
        }
        cloud_cfg = util.yaml_dumps(self.cfg)
        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
        util.write_file(os.path.join(self.new_root, 'etc',
                                     'cloud', 'cloud.cfg'), cloud_cfg)
        self.patchOS(self.new_root)
        self.patchUtils(self.new_root)

    def test_none_ds_populates_var_lib_cloud(self):
        """Init and run_section default behavior creates appropriate dirs."""
        # Now start verifying whats created
        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        self.assertTrue(os.path.exists("/var/lib/cloud"))
        for d in ['scripts', 'seed', 'instances', 'handlers', 'sem', 'data']:
            self.assertTrue(os.path.isdir(os.path.join("/var/lib/cloud", d)))

        initer.fetch()
        iid = initer.instancify()
        self.assertEqual(iid, 'iid-datasource-none')
        initer.update()
        self.assertTrue(os.path.islink("var/lib/cloud/instance"))

    def test_none_ds_runs_modules_which_do_not_define_distros(self):
        """Any modules which do not define a distros attribute are run."""
        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        initer.fetch()
        initer.instancify()
        initer.update()
        initer.cloudify().run('consume_data', initer.consume_data,
                              args=[PER_INSTANCE], freq=PER_INSTANCE)

        mods = stages.Modules(initer)
        (which_ran, failures) = mods.run_section('cloud_init_modules')
        self.assertTrue(len(failures) == 0)
        self.assertTrue(os.path.exists('/etc/blah.ini'))
        self.assertIn('write-files', which_ran)
        contents = util.load_file('/etc/blah.ini')
        self.assertEqual(contents, 'blah')
        self.assertNotIn(
            "Skipping modules ['write-files'] because they are not verified on"
            " distro 'ubuntu'",
            self.logs.getvalue())

    def test_none_ds_skips_modules_which_define_unmatched_distros(self):
        """Skip modules which define distros which don't match the current."""
        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        initer.fetch()
        initer.instancify()
        initer.update()
        initer.cloudify().run('consume_data', initer.consume_data,
                              args=[PER_INSTANCE], freq=PER_INSTANCE)

        mods = stages.Modules(initer)
        (which_ran, failures) = mods.run_section('cloud_init_modules')
        self.assertTrue(len(failures) == 0)
        self.assertIn(
            "Skipping modules 'spacewalk' because they are not verified on"
            " distro 'ubuntu'",
            self.logs.getvalue())
        self.assertNotIn('spacewalk', which_ran)

    def test_none_ds_runs_modules_which_distros_all(self):
        """Skip modules which define distros attribute as supporting 'all'.

        This is done in the module with the declaration:
        distros = [ALL_DISTROS]. runcmd is an example.
        """
        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        initer.fetch()
        initer.instancify()
        initer.update()
        initer.cloudify().run('consume_data', initer.consume_data,
                              args=[PER_INSTANCE], freq=PER_INSTANCE)

        mods = stages.Modules(initer)
        (which_ran, failures) = mods.run_section('cloud_init_modules')
        self.assertTrue(len(failures) == 0)
        self.assertIn('runcmd', which_ran)
        self.assertNotIn(
            "Skipping modules 'runcmd' because they are not verified on"
            " distro 'ubuntu'",
            self.logs.getvalue())

    def test_none_ds_forces_run_via_unverified_modules(self):
        """run_section forced skipped modules by using unverified_modules."""

        # re-write cloud.cfg with unverified_modules override
        cfg = copy.deepcopy(self.cfg)
        cfg['unverified_modules'] = ['spacewalk']  # Would have skipped
        cloud_cfg = util.yaml_dumps(cfg)
        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
        util.write_file(os.path.join(self.new_root, 'etc',
                                     'cloud', 'cloud.cfg'), cloud_cfg)

        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        initer.fetch()
        initer.instancify()
        initer.update()
        initer.cloudify().run('consume_data', initer.consume_data,
                              args=[PER_INSTANCE], freq=PER_INSTANCE)

        mods = stages.Modules(initer)
        (which_ran, failures) = mods.run_section('cloud_init_modules')
        self.assertTrue(len(failures) == 0)
        self.assertIn('spacewalk', which_ran)
        self.assertIn(
            "running unverified_modules: 'spacewalk'",
            self.logs.getvalue())

    def test_none_ds_run_with_no_config_modules(self):
        """run_section will report no modules run when none are configured."""

        # re-write cloud.cfg with unverified_modules override
        cfg = copy.deepcopy(self.cfg)
        # Represent empty configuration in /etc/cloud/cloud.cfg
        cfg['cloud_init_modules'] = None
        cloud_cfg = util.yaml_dumps(cfg)
        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
        util.write_file(os.path.join(self.new_root, 'etc',
                                     'cloud', 'cloud.cfg'), cloud_cfg)

        initer = stages.Init()
        initer.read_cfg()
        initer.initialize()
        initer.fetch()
        initer.instancify()
        initer.update()
        initer.cloudify().run('consume_data', initer.consume_data,
                              args=[PER_INSTANCE], freq=PER_INSTANCE)

        mods = stages.Modules(initer)
        (which_ran, failures) = mods.run_section('cloud_init_modules')
        self.assertTrue(len(failures) == 0)
        self.assertEqual([], which_ran)

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