# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import extras
import fixtures
import json
import os
from oslo.config import cfg
import testtools
from testtools import matchers

from os_collect_config import collect
from os_collect_config.tests import test_cfn
from os_collect_config.tests import test_ec2


class TestCollect(testtools.TestCase):
    def tearDown(self):
        super(TestCollect, self).tearDown()
        cfg.CONF.reset()

    def test_main(self):
        expected_cmd = self.getUniqueString()
        cache_dir = self.useFixture(fixtures.TempDir())
        fake_args = [
            'os-collect-config',
            '--command',
            expected_cmd,
            '--cachedir',
            cache_dir.path,
            '--config-file',
            '/dev/null',
            '--cfn-metadata-url',
            'http://127.0.0.1:8000/',
            '--cfn-stack-name',
            'foo',
            '--cfn-path',
            'foo.Metadata'
        ]
        self.useFixture(
            fixtures.MonkeyPatch('sys.argv', fake_args))
        self.called_fake_call = False

        def fake_call(args, env, shell):
            self.called_fake_call = True
            self.assertEquals(expected_cmd, args)
            self.assertIn('OS_CONFIG_FILES', env)
            self.assertTrue(len(env.keys()) > 0)
            keys_found = set()
            for path in env['OS_CONFIG_FILES'].split(':'):
                self.assertTrue(os.path.exists(path))
                with open(path) as cfg_file:
                    contents = json.loads(cfg_file.read())
                    keys_found.update(set(contents.keys()))
            # From test_ec2.FakeRequests
            self.assertIn("local-ipv4", keys_found)
            self.assertIn("reservation-id", keys_found)
            # From test_cfn.FakeRequests
            self.assertIn("int1", keys_found)
            self.assertIn("map_ab", keys_found)

        self.useFixture(fixtures.MonkeyPatch('subprocess.call', fake_call))

        requests_impl_map = {'ec2': test_ec2.FakeRequests,
                             'cfn': test_cfn.FakeRequests(self)}
        collect.__main__(requests_impl_map=requests_impl_map)

        self.assertTrue(self.called_fake_call)

    def test_main_no_command(self):
        fake_args = [
            'os-collect-config',
            '--config-file',
            '/dev/null',
            '--cfn-metadata-url',
            'http://127.0.0.1:8000/',
            '--cfn-stack-name',
            'foo',
            '--cfn-path',
            'foo.Metadata'
        ]
        self.useFixture(
            fixtures.MonkeyPatch('sys.argv', fake_args))
        output = self.useFixture(fixtures.ByteStream('stdout'))
        self.useFixture(
            fixtures.MonkeyPatch('sys.stdout', output.stream))
        requests_impl_map = {'ec2': test_ec2.FakeRequests,
                             'cfn': test_cfn.FakeRequests(self)}
        collect.__main__(requests_impl_map=requests_impl_map)
        out_struct = json.loads(output.stream.getvalue())
        self.assertThat(out_struct, matchers.IsInstance(dict))
        self.assertIn('ec2', out_struct)
        self.assertIn('cfn', out_struct)


class TestConf(testtools.TestCase):
    def test_setup_conf(self):
        collect.setup_conf()
        self.assertEquals('/var/run/os-collect-config', cfg.CONF.cachedir)
        self.assertTrue(extras.safe_hasattr(cfg.CONF, 'ec2'))
        self.assertTrue(extras.safe_hasattr(cfg.CONF, 'cfn'))