# vi: ts=4 expandtab
#
#    Copyright (C) 2014 Yahoo! Inc.
#
#    Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 3, as
#    published by the Free Software Foundation.
#
#    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 copy
import json
import re

from .. import helpers as test_helpers

from six import StringIO
from six.moves.urllib.parse import urlparse

from cloudinit import helpers
from cloudinit import settings
from cloudinit.sources import DataSourceOpenStack as ds
from cloudinit.sources.helpers import openstack
from cloudinit import util

hp = test_helpers.import_httpretty()

BASE_URL = "http://169.254.169.254"
PUBKEY = u'ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460\n'
EC2_META = {
    'ami-id': 'ami-00000001',
    'ami-launch-index': '0',
    'ami-manifest-path': 'FIXME',
    'hostname': 'sm-foo-test.novalocal',
    'instance-action': 'none',
    'instance-id': 'i-00000001',
    'instance-type': 'm1.tiny',
    'local-hostname': 'sm-foo-test.novalocal',
    'local-ipv4': '0.0.0.0',
    'public-hostname': 'sm-foo-test.novalocal',
    'public-ipv4': '0.0.0.1',
    'reservation-id': 'r-iru5qm4m',
}
USER_DATA = b'#!/bin/sh\necho This is user data\n'
VENDOR_DATA = {
    'magic': '',
}
OSTACK_META = {
    'availability_zone': 'nova',
    'files': [{'content_path': '/content/0000', 'path': '/etc/foo.cfg'},
              {'content_path': '/content/0001', 'path': '/etc/bar/bar.cfg'}],
    'hostname': 'sm-foo-test.novalocal',
    'meta': {'dsmode': 'local', 'my-meta': 'my-value'},
    'name': 'sm-foo-test',
    'public_keys': {'mykey': PUBKEY},
    'uuid': 'b0fa911b-69d4-4476-bbe2-1c92bff6535c',
}
CONTENT_0 = b'This is contents of /etc/foo.cfg\n'
CONTENT_1 = b'# this is /etc/bar/bar.cfg\n'
OS_FILES = {
    'openstack/latest/meta_data.json': json.dumps(OSTACK_META),
    'openstack/latest/user_data': USER_DATA,
    'openstack/content/0000': CONTENT_0,
    'openstack/content/0001': CONTENT_1,
    'openstack/latest/meta_data.json': json.dumps(OSTACK_META),
    'openstack/latest/user_data': USER_DATA,
    'openstack/latest/vendor_data.json': json.dumps(VENDOR_DATA),
}
EC2_FILES = {
    'latest/user-data': USER_DATA,
}
EC2_VERSIONS = [
    'latest',
]


def _register_uris(version, ec2_files, ec2_meta, os_files):
    """Registers a set of url patterns into httpretty that will mimic the
    same data returned by the openstack metadata service (and ec2 service)."""

    def match_ec2_url(uri, headers):
        path = uri.path.strip("/")
        if len(path) == 0:
            return (200, headers, "\n".join(EC2_VERSIONS))
        path = uri.path.lstrip("/")
        if path in ec2_files:
            return (200, headers, ec2_files.get(path))
        if path == 'latest/meta-data/':
            buf = StringIO()
            for (k, v) in ec2_meta.items():
                if isinstance(v, (list, tuple)):
                    buf.write("%s/" % (k))
                else:
                    buf.write("%s" % (k))
                buf.write("\n")
            return (200, headers, buf.getvalue())
        if path.startswith('latest/meta-data/'):
            value = None
            pieces = path.split("/")
            if path.endswith("/"):
                pieces = pieces[2:-1]
                value = util.get_cfg_by_path(ec2_meta, pieces)
            else:
                pieces = pieces[2:]
                value = util.get_cfg_by_path(ec2_meta, pieces)
            if value is not None:
                return (200, headers, str(value))
        return (404, headers, '')

    def match_os_uri(uri, headers):
        path = uri.path.strip("/")
        if path == 'openstack':
            return (200, headers, "\n".join([openstack.OS_LATEST]))
        path = uri.path.lstrip("/")
        if path in os_files:
            return (200, headers, os_files.get(path))
        return (404, headers, '')

    def get_request_callback(method, uri, headers):
        uri = urlparse(uri)
        path = uri.path.lstrip("/").split("/")
        if path[0] == 'openstack':
            return match_os_uri(uri, headers)
        return match_ec2_url(uri, headers)

    hp.register_uri(hp.GET, re.compile(r'http://169.254.169.254/.*'),
                    body=get_request_callback)


class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
    VERSION = 'latest'

    @hp.activate
    def test_successful(self):
        _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
        f = ds.read_metadata_service(BASE_URL)
        self.assertEquals(VENDOR_DATA, f.get('vendordata'))
        self.assertEquals(CONTENT_0, f['files']['/etc/foo.cfg'])
        self.assertEquals(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
        self.assertEquals(2, len(f['files']))
        self.assertEquals(USER_DATA, f.get('userdata'))
        self.assertEquals(EC2_META, f.get('ec2-metadata'))
        self.assertEquals(2, f.get('version'))
        metadata = f['metadata']
        self.assertEquals('nova', metadata.get('availability_zone'))
        self.assertEquals('sm-foo-test.novalocal', metadata.get('hostname'))
        self.assertEquals('sm-foo-test.novalocal',
                          metadata.get('local-hostname'))
        self.assertEquals('sm-foo-test', metadata.get('name'))
        self.assertEquals('b0fa911b-69d4-4476-bbe2-1c92bff6535c',
                          metadata.get('uuid'))
        self.assertEquals('b0fa911b-69d4-4476-bbe2-1c92bff6535c',
                          metadata.get('instance-id'))

    @hp.activate
    def test_no_ec2(self):
        _register_uris(self.VERSION, {}, {}, OS_FILES)
        f = ds.read_metadata_service(BASE_URL)
        self.assertEquals(VENDOR_DATA, f.get('vendordata'))
        self.assertEquals(CONTENT_0, f['files']['/etc/foo.cfg'])
        self.assertEquals(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
        self.assertEquals(USER_DATA, f.get('userdata'))
        self.assertEquals({}, f.get('ec2-metadata'))
        self.assertEquals(2, f.get('version'))

    @hp.activate
    def test_bad_metadata(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files.pop(k, None)
        _register_uris(self.VERSION, {}, {}, os_files)
        self.assertRaises(openstack.NonReadable, ds.read_metadata_service,
                          BASE_URL)

    @hp.activate
    def test_bad_uuid(self):
        os_files = copy.deepcopy(OS_FILES)
        os_meta = copy.deepcopy(OSTACK_META)
        os_meta.pop('uuid')
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files[k] = json.dumps(os_meta)
        _register_uris(self.VERSION, {}, {}, os_files)
        self.assertRaises(openstack.BrokenMetadata, ds.read_metadata_service,
                          BASE_URL)

    @hp.activate
    def test_userdata_empty(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('user_data'):
                os_files.pop(k, None)
        _register_uris(self.VERSION, {}, {}, os_files)
        f = ds.read_metadata_service(BASE_URL)
        self.assertEquals(VENDOR_DATA, f.get('vendordata'))
        self.assertEquals(CONTENT_0, f['files']['/etc/foo.cfg'])
        self.assertEquals(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
        self.assertFalse(f.get('userdata'))

    @hp.activate
    def test_vendordata_empty(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('vendor_data.json'):
                os_files.pop(k, None)
        _register_uris(self.VERSION, {}, {}, os_files)
        f = ds.read_metadata_service(BASE_URL)
        self.assertEquals(CONTENT_0, f['files']['/etc/foo.cfg'])
        self.assertEquals(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
        self.assertFalse(f.get('vendordata'))

    @hp.activate
    def test_vendordata_invalid(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('vendor_data.json'):
                os_files[k] = '{'  # some invalid json
        _register_uris(self.VERSION, {}, {}, os_files)
        self.assertRaises(openstack.BrokenMetadata, ds.read_metadata_service,
                          BASE_URL)

    @hp.activate
    def test_metadata_invalid(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files[k] = '{'  # some invalid json
        _register_uris(self.VERSION, {}, {}, os_files)
        self.assertRaises(openstack.BrokenMetadata, ds.read_metadata_service,
                          BASE_URL)

    @hp.activate
    def test_datasource(self):
        _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
                                       None,
                                       helpers.Paths({}))
        self.assertIsNone(ds_os.version)
        found = ds_os.get_data()
        self.assertTrue(found)
        self.assertEquals(2, ds_os.version)
        md = dict(ds_os.metadata)
        md.pop('instance-id', None)
        md.pop('local-hostname', None)
        self.assertEquals(OSTACK_META, md)
        self.assertEquals(EC2_META, ds_os.ec2_metadata)
        self.assertEquals(USER_DATA, ds_os.userdata_raw)
        self.assertEquals(2, len(ds_os.files))
        self.assertEquals(VENDOR_DATA, ds_os.vendordata_pure)
        self.assertEquals(ds_os.vendordata_raw, None)

    @hp.activate
    def test_bad_datasource_meta(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files[k] = '{'  # some invalid json
        _register_uris(self.VERSION, {}, {}, os_files)
        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
                                       None,
                                       helpers.Paths({}))
        self.assertIsNone(ds_os.version)
        found = ds_os.get_data()
        self.assertFalse(found)
        self.assertIsNone(ds_os.version)

    @hp.activate
    def test_no_datasource(self):
        os_files = copy.deepcopy(OS_FILES)
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files.pop(k)
        _register_uris(self.VERSION, {}, {}, os_files)
        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
                                       None,
                                       helpers.Paths({}))
        ds_os.ds_cfg = {
            'max_wait': 0,
            'timeout': 0,
        }
        self.assertIsNone(ds_os.version)
        found = ds_os.get_data()
        self.assertFalse(found)
        self.assertIsNone(ds_os.version)

    @hp.activate
    def test_disabled_datasource(self):
        os_files = copy.deepcopy(OS_FILES)
        os_meta = copy.deepcopy(OSTACK_META)
        os_meta['meta'] = {
            'dsmode': 'disabled',
        }
        for k in list(os_files.keys()):
            if k.endswith('meta_data.json'):
                os_files[k] = json.dumps(os_meta)
        _register_uris(self.VERSION, {}, {}, os_files)
        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
                                       None,
                                       helpers.Paths({}))
        ds_os.ds_cfg = {
            'max_wait': 0,
            'timeout': 0,
        }
        self.assertIsNone(ds_os.version)
        found = ds_os.get_data()
        self.assertFalse(found)
        self.assertIsNone(ds_os.version)


class TestVendorDataLoading(test_helpers.TestCase):
    def cvj(self, data):
        return openstack.convert_vendordata_json(data)

    def test_vd_load_none(self):
        # non-existant vendor-data should return none
        self.assertIsNone(self.cvj(None))

    def test_vd_load_string(self):
        self.assertEqual(self.cvj("foobar"), "foobar")

    def test_vd_load_list(self):
        data = [{'foo': 'bar'}, 'mystring', list(['another', 'list'])]
        self.assertEqual(self.cvj(data), data)

    def test_vd_load_dict_no_ci(self):
        self.assertEqual(self.cvj({'foo': 'bar'}), None)

    def test_vd_load_dict_ci_dict(self):
        self.assertRaises(ValueError, self.cvj,
                          {'foo': 'bar', 'cloud-init': {'x': 1}})

    def test_vd_load_dict_ci_string(self):
        data = {'foo': 'bar', 'cloud-init': 'VENDOR_DATA'}
        self.assertEqual(self.cvj(data), data['cloud-init'])

    def test_vd_load_dict_ci_list(self):
        data = {'foo': 'bar', 'cloud-init': ['VD_1', 'VD_2']}
        self.assertEqual(self.cvj(data), data['cloud-init'])