# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
#    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 boto
from boto.ec2 import regioninfo
import httplib
import random
import StringIO
import webob

from nova import test
from nova.auth import manager
from nova.api import ec2
from nova.api.ec2 import cloud


class FakeHttplibSocket(object):
    """ a fake socket implementation for httplib.HTTPResponse, trivial """
    def __init__(self, s):
        self.fp = StringIO.StringIO(s)

    def makefile(self, mode, other):
        return self.fp


class FakeHttplibConnection(object):
    """ a fake httplib.HTTPConnection for boto to use

    requests made via this connection actually get translated and routed into
    our WSGI app, we then wait for the response and turn it back into
    the httplib.HTTPResponse that boto expects.
    """
    def __init__(self, app, host, is_secure=False):
        self.app = app
        self.host = host

    def request(self, method, path, data, headers):
        req = webob.Request.blank(path)
        req.method = method
        req.body = data
        req.headers = headers
        req.headers['Accept'] = 'text/html'
        req.host = self.host
        # Call the WSGI app, get the HTTP response
        resp = str(req.get_response(self.app))
        # For some reason, the response doesn't have "HTTP/1.0 " prepended; I
        # guess that's a function the web server usually provides.
        resp = "HTTP/1.0 %s" % resp

        sock = FakeHttplibSocket(resp)
        self.http_response = httplib.HTTPResponse(sock)
        self.http_response.begin()

    def getresponse(self):
        return self.http_response

    def close(self):
        pass


class ApiEc2TestCase(test.BaseTestCase):
    def setUp(self):
        super(ApiEc2TestCase, self).setUp()

        self.manager = manager.AuthManager()
        self.cloud = cloud.CloudController()

        self.host = '127.0.0.1'

        self.app = ec2.API()
        self.ec2 = boto.connect_ec2(
                aws_access_key_id='fake',
                aws_secret_access_key='fake',
                is_secure=False,
                region=regioninfo.RegionInfo(None, 'test', self.host),
                port=0,
                path='/services/Cloud')

        self.mox.StubOutWithMock(self.ec2, 'new_http_connection')

    def expect_http(self, host=None, is_secure=False):
        http = FakeHttplibConnection(
                self.app, '%s:0' % (self.host), False)
        self.ec2.new_http_connection(host, is_secure).AndReturn(http)
        return http

    def test_describe_instances(self):
        self.expect_http()
        self.mox.ReplayAll()
        user = self.manager.create_user('fake', 'fake', 'fake')
        project = self.manager.create_project('fake', 'fake', 'fake')
        self.assertEqual(self.ec2.get_all_instances(), [])
        self.manager.delete_project(project)
        self.manager.delete_user(user)


    def test_get_all_key_pairs(self):
        self.expect_http()
        self.mox.ReplayAll()
        keyname = "".join(random.choice("sdiuisudfsdcnpaqwertasd") for x in range(random.randint(4, 8)))
        user = self.manager.create_user('fake', 'fake', 'fake')
        project = self.manager.create_project('fake', 'fake', 'fake')
        self.manager.generate_key_pair(user.id, keyname)

        rv = self.ec2.get_all_key_pairs()
        self.assertTrue(filter(lambda k: k.name == keyname, rv))
        self.manager.delete_project(project)
        self.manager.delete_user(user)