# Copyright (C) 2013 eNovance SAS <licensing@enovance.com>
#
# 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 hashlib
import hmac
import time
from urllib import parse as urlparse

from tempest.api.object_storage import base
from tempest.common import utils
from tempest.lib.common.utils import data_utils
from tempest.lib import decorators
from tempest.lib import exceptions as lib_exc


class ObjectFormPostNegativeTest(base.BaseObjectTest):
    """Negative tests of object post with form"""

    metadata = {}
    containers = []

    @classmethod
    def resource_setup(cls):
        super(ObjectFormPostNegativeTest, cls).resource_setup()
        cls.container_name = cls.create_container()
        cls.object_name = data_utils.rand_name(name='ObjectTemp')

        cls.key = 'Meta'
        cls.metadata = {'Temp-URL-Key': cls.key}
        cls.account_client.create_update_or_delete_account_metadata(
            create_update_metadata=cls.metadata)

    def setUp(self):
        super(ObjectFormPostNegativeTest, self).setUp()

        # make sure the metadata has been set
        account_client_metadata, _ = \
            self.account_client.list_account_metadata()
        self.assertIn('x-account-meta-temp-url-key',
                      account_client_metadata)
        self.assertEqual(
            account_client_metadata['x-account-meta-temp-url-key'],
            self.key)

    @classmethod
    def resource_cleanup(cls):
        cls.account_client.create_update_or_delete_account_metadata(
            delete_metadata=cls.metadata)
        cls.delete_containers()
        super(ObjectFormPostNegativeTest, cls).resource_cleanup()

    def get_multipart_form(self, expires=600):
        path = "%s/%s/%s" % (
            urlparse.urlparse(self.container_client.base_url).path,
            self.container_name,
            self.object_name)

        redirect = ''
        max_file_size = 104857600
        max_file_count = 10
        expires += int(time.time())
        hmac_body = '%s\n%s\n%s\n%s\n%s' % (path,
                                            redirect,
                                            max_file_size,
                                            max_file_count,
                                            expires)

        signature = hmac.new(
            self.key.encode(), hmac_body.encode(), hashlib.sha1
        ).hexdigest()

        fields = {'redirect': redirect,
                  'max_file_size': str(max_file_size),
                  'max_file_count': str(max_file_count),
                  'expires': str(expires),
                  'signature': signature}

        boundary = '--boundary--'
        data = []
        for (key, value) in fields.items():
            data.append('--' + boundary)
            data.append('Content-Disposition: form-data; name="%s"' % key)
            data.append('')
            data.append(value)

        data.append('--' + boundary)
        data.append('Content-Disposition: form-data; '
                    'name="file1"; filename="testfile"')
        data.append('Content-Type: application/octet-stream')
        data.append('')
        data.append('hello world')

        data.append('--' + boundary + '--')
        data.append('')

        body = '\r\n'.join(data)
        content_type = 'multipart/form-data; boundary=%s' % boundary
        return body, content_type

    @decorators.idempotent_id('d3fb3c4d-e627-48ce-9379-a1631f21336d')
    @utils.requires_ext(extension='formpost', service='object')
    @decorators.attr(type=['negative'])
    def test_post_object_using_form_expired(self):
        """Test posting object using expired form"""
        body, content_type = self.get_multipart_form(expires=1)
        time.sleep(2)

        headers = {'Content-Type': content_type,
                   'Content-Length': str(len(body))}

        url = "%s/%s" % (self.container_name, self.object_name)
        exc = self.assertRaises(
            lib_exc.Unauthorized,
            self.object_client.post,
            url, body, headers=headers)
        self.assertIn('FormPost: Form Expired', str(exc))

    @decorators.idempotent_id('b277257f-113c-4499-b8d1-5fead79f7360')
    @utils.requires_ext(extension='formpost', service='object')
    @decorators.attr(type=['negative'])
    def test_post_object_using_form_invalid_signature(self):
        """Test posting object using form with invalid signature"""
        self.key = "Wrong"
        body, content_type = self.get_multipart_form()

        headers = {'Content-Type': content_type,
                   'Content-Length': str(len(body))}

        url = "%s/%s" % (self.container_name, self.object_name)
        exc = self.assertRaises(
            lib_exc.Unauthorized,
            self.object_client.post,
            url, body, headers=headers)
        self.assertIn('FormPost: Invalid Signature', str(exc))