"""
Copyright (c) 2017 SONATA-NFV and Paderborn University
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.

Neither the name of the SONATA-NFV, Paderborn University
nor the names of its contributors may be used to endorse or promote
products derived from this software without specific prior written
permission.

This work has been performed in the framework of the SONATA project,
funded by the European Commission under Grant number 671517 through
the Horizon 2020 and 5G-PPP programmes. The authors would like to
acknowledge the contributions of their colleagues of the SONATA
partner consortium (www.sonata-nfv.eu).
"""
from flask_restful import Resource
from flask import request, Response
from emuvim.api.openstack.openstack_dummies.base_openstack_dummy import BaseOpenstackDummy
from emuvim.api.openstack.helper import get_host
import logging
import json

LOG = logging.getLogger("api.openstack.keystone")


class KeystoneDummyApi(BaseOpenstackDummy):
    def __init__(self, in_ip, in_port):
        super(KeystoneDummyApi, self).__init__(in_ip, in_port)

        self.api.add_resource(KeystoneListVersions, "/", resource_class_kwargs={'api': self})
        self.api.add_resource(KeystoneShowAPIv2, "/v2.0", resource_class_kwargs={'api': self})
        self.api.add_resource(KeystoneGetToken, "/v2.0/tokens", resource_class_kwargs={'api': self})
        self.api.add_resource(KeystoneShowAPIv3, "/v3.0", resource_class_kwargs={'api': self})
        self.api.add_resource(KeystoneGetTokenv3, "/v3.0/auth/tokens", resource_class_kwargs={'api': self})


class KeystoneListVersions(Resource):
    """
    List all known keystone versions.
    Hardcoded for our version!
    """

    def __init__(self, api):
        self.api = api

    def get(self):
        """
        List API versions.

        :return: Returns the api versions.
        :rtype: :class:`flask.response` containing a static json encoded dict.
        """
        LOG.debug("API CALL: %s GET" % str(self.__class__.__name__))
        resp = dict()
        resp['versions'] = dict()

        version = [{
            "id": "v2.0",
            "links": [
                {
                    "href": "http://%s:%d/v2.0" % (get_host(request), self.api.port),
                    "rel": "self"
                }
            ],
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.identity-v2.0+json"
                }
            ],
            "status": "stable",
            "updated": "2014-04-17T00:00:00Z"
        }]
        resp['versions']['values'] = version

        return Response(json.dumps(resp), status=200, mimetype='application/json')


class KeystoneShowAPIv2(Resource):
    """
    Entrypoint for all openstack clients.
    This returns all current entrypoints running on son-emu.
    """

    def __init__(self, api):
        self.api = api

    def get(self):
        """
        List API entrypoints.

        :return: Returns an openstack style response for all entrypoints.
        :rtype: :class:`flask.response`
        """
        LOG.debug("API CALL: %s GET" % str(self.__class__.__name__))

        neutron_port = self.api.port + 4696
        heat_port = self.api.port + 3004

        resp = dict()
        resp['version'] = {
            "status": "stable",
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.identity-v2.0+json"
                }
            ],
            "id": "v2.0",
            "links": [
                {
                    "href": "http://%s:%d/v2.0" % (get_host(request), self.api.port),
                    "rel": "self"
                }
            ]
        }
        LOG.debug(json.dumps(resp))
        return Response(json.dumps(resp), status=200, mimetype='application/json')


class KeystoneShowAPIv3(Resource):
    """
    Entrypoint for all openstack clients.
    This returns all current entrypoints running on son-emu.
    """

    def __init__(self, api):
        self.api = api

    def get(self):
        """
        List API entrypoints.

        :return: Returns an openstack style response for all entrypoints.
        :rtype: :class:`flask.response`
        """
        LOG.debug("API CALL: %s GET" % str(self.__class__.__name__))

        neutron_port = self.api.port + 4696
        heat_port = self.api.port + 3004

        resp = dict()
        resp['version'] = {
            "status": "stable",
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.identity-v3.0+json"
                }
            ],
            "id": "v3.0",
            "links": [
                {
                    "href": "http://%s:%d/v3.0" % (get_host(request), self.api.port),
                    "rel": "self"
                }
            ]
        }

        return Response(json.dumps(resp), status=200, mimetype='application/json')


class KeystoneGetToken(Resource):
    """
    Returns a static keystone token.
    We don't do any validation so we don't care.
    """

    def __init__(self, api):
        self.api = api

    def post(self):
        """
        List API entrypoints.

        This is hardcoded. For a working "authentication" use these ENVVARS:

        * OS_AUTH_URL=http://<ip>:<port>/v2.0
        * OS_IDENTITY_API_VERSION=2.0
        * OS_TENANT_ID=fc394f2ab2df4114bde39905f800dc57
        * OS_REGION_NAME=RegionOne
        * OS_USERNAME=bla
        * OS_PASSWORD=bla

        :return: Returns an openstack style response for all entrypoints.
        :rtype: :class:`flask.response`
        """

        LOG.debug("API CALL: %s POST" % str(self.__class__.__name__))
        try:
            ret = dict()
            req = json.loads(request.data)
            ret['access'] = dict()
            ret['access']['token'] = dict()
            token = ret['access']['token']

            token['issued_at'] = "2014-01-30T15:30:58.819Z"
            token['expires'] = "2999-01-30T15:30:58.819Z"
            token['id'] = req['auth'].get('token', {'id': 'fc394f2ab2df4114bde39905f800dc57'}).get('id')
            token['tenant'] = dict()
            token['tenant']['description'] = None
            token['tenant']['enabled'] = True
            token['tenant']['id'] = req['auth'].get('tenantId', 'fc394f2ab2df4114bde39905f800dc57')
            token['tenant']['name'] = "tenantName"

            ret['access']['user'] = dict()
            user = ret['access']['user']
            user['username'] = req.get('username', "username")
            user['name'] = "tenantName"
            user['roles_links'] = list()
            user['id'] = token['tenant'].get('id', "fc394f2ab2df4114bde39905f800dc57")
            user['roles'] = [{'name': 'Member'}]

            ret['access']['region_name'] = "RegionOne"

            ret['access']['serviceCatalog'] = [{
                "endpoints": [
                    {
                        "adminURL": "http://%s:%s/v2.1/%s" % (get_host(request), self.api.port + 3774, user['id']),
                        "region": "RegionOne",
                        "internalURL": "http://%s:%s/v2.1/%s" % (get_host(request), self.api.port + 3774, user['id']),
                        "id": "2dad48f09e2a447a9bf852bcd93548ef",
                        "publicURL": "http://%s:%s/v2.1/%s" % (get_host(request), self.api.port + 3774, user['id'])
                    }
                ],
                "endpoints_links": [],
                "type": "compute",
                "name": "nova"
            },
                {
                    "endpoints": [
                        {
                            "adminURL": "http://%s:%s/v2.0" % (get_host(request), self.api.port),
                            "region": "RegionOne",
                            "internalURL": "http://%s:%s/v2.0" % (get_host(request), self.api.port),
                            "id": "2dad48f09e2a447a9bf852bcd93543fc",
                            "publicURL": "http://%s:%s/v2" % (get_host(request), self.api.port)
                        }
                    ],
                    "endpoints_links": [],
                    "type": "identity",
                    "name": "keystone"
                },
                {
                    "endpoints": [
                        {
                            "adminURL": "http://%s:%s" % (get_host(request), self.api.port + 4696),
                            "region": "RegionOne",
                            "internalURL": "http://%s:%s" % (get_host(request), self.api.port + 4696),
                            "id": "2dad48f09e2a447a9bf852bcd93548cf",
                            "publicURL": "http://%s:%s" % (get_host(request), self.api.port + 4696)
                        }
                    ],
                    "endpoints_links": [],
                    "type": "network",
                    "name": "neutron"
                },
                {
                    "endpoints": [
                        {
                            "adminURL": "http://%s:%s" % (get_host(request), self.api.port + 4242),
                            "region": "RegionOne",
                            "internalURL": "http://%s:%s" % (get_host(request), self.api.port + 4242),
                            "id": "2dad48f09e2a447a9bf852bcd93548cf",
                            "publicURL": "http://%s:%s" % (get_host(request), self.api.port + 4242)
                        }
                    ],
                    "endpoints_links": [],
                    "type": "image",
                    "name": "glance"
                },
                {
                    "endpoints": [
                        {
                            "adminURL": "http://%s:%s/v1/%s" % (get_host(request), self.api.port + 3004, user['id']),
                            "region": "RegionOne",
                            "internalURL": "http://%s:%s/v1/%s" % (get_host(request), self.api.port + 3004, user['id']),
                            "id": "2dad48f09e2a447a9bf852bcd93548bf",
                            "publicURL": "http://%s:%s/v1/%s" % (get_host(request), self.api.port + 3004, user['id'])
                        }
                    ],
                    "endpoints_links": [],
                    "type": "orchestration",
                    "name": "heat"
                }
            ]

            ret['access']["metadata"] = {
                                            "is_admin": 0,
                                            "roles": [
                                                "7598ac3c634d4c3da4b9126a5f67ca2b"
                                            ]
                                        },
            ret['access']['trust'] = {
                "id": "394998fa61f14736b1f0c1f322882949",
                "trustee_user_id": "269348fdd9374b8885da1418e0730af1",
                "trustor_user_id": "3ec3164f750146be97f21559ee4d9c51",
                "impersonation": False
            }
            return Response(json.dumps(ret), status=200, mimetype='application/json')

        except Exception as ex:
            logging.exception("Keystone: Get token failed.")
            return ex.message, 500

class KeystoneGetTokenv3(Resource):
    """
    Returns a static keystone token.
    We don't do any validation so we don't care.
    """

    def __init__(self, api):
        self.api = api

    def post(self):
        """
        List API entrypoints.

        This is hardcoded. For a working "authentication" use these ENVVARS:

        * OS_AUTH_URL=http://<ip>:<port>/v3
        * OS_IDENTITY_API_VERSION=2.0
        * OS_TENANT_ID=fc394f2ab2df4114bde39905f800dc57
        * OS_REGION_NAME=RegionOne
        * OS_USERNAME=bla
        * OS_PASSWORD=bla

        :return: Returns an openstack style response for all entrypoints.
        :rtype: :class:`flask.response`
        """

        LOG.debug("API CALL: %s POST" % str(self.__class__.__name__))
        try:
            ret = dict()
            req = json.loads(request.data)
            ret['token'] = dict()
            token = ret['token']

            token['issued_at'] = "2014-01-30T15:30:58.819Z"
            token['expires_at'] = "2999-01-30T15:30:58.819Z"
            token['methods'] = ["password"]
            token['extras'] = dict()
            token['user'] = dict()
            user = token['user']
            user['id'] = req['auth'].get('token', {'id': 'fc394f2ab2df4114bde39905f800dc57'}).get('id')
            user['name'] = "tenantName"
            user['password_expires_at'] = None
            user['domain'] = {"id": "default", "name": "Default"}
            token['audit_ids'] = ["ZzZwkUflQfygX7pdYDBCQQ"]

            # project
            token['project'] = {
                "domain": {
                    "id" : "default",
                    "name": "Default"
                },
                "id": "8538a3f13f9541b28c2620eb19065e45",
                "name": "tenantName"
            }

            # catalog
            token['catalog'] = [{
                "endpoints": [
                    {
                        "url": "http://%s:%s/v2.1/%s" % (get_host(request), self.api.port + 3774, user['id']),
                        "region": "RegionOne",
                        "interface": "public",
                        "id": "2dad48f09e2a447a9bf852bcd93548ef"
                    }
                ],
                "id": "2dad48f09e2a447a9bf852bcd93548ef",
                "type": "compute",
                "name": "nova"
            },
                {
                    "endpoints": [
                        {
                            "url": "http://%s:%s/v2.0" % (get_host(request), self.api.port),
                            "region": "RegionOne",
                            "interface": "public",
                            "id": "2dad48f09e2a447a9bf852bcd93543fc"
                        }
                    ],
                    "id": "2dad48f09e2a447a9bf852bcd93543fc",
                    "type": "identity",
                    "name": "keystone"
                },
                {
                    "endpoints": [
                        {
                            "url": "http://%s:%s" % (get_host(request), self.api.port + 4696),
                            "region": "RegionOne",
                            "interface": "public",
                            "id": "2dad48f09e2a447a9bf852bcd93548cf"
                        }
                    ],
                    "id": "2dad48f09e2a447a9bf852bcd93548cf",
                    "type": "network",
                    "name": "neutron"
                },
                {
                    "endpoints": [
                        {
                            "url": "http://%s:%s" % (get_host(request), self.api.port + 4242),
                            "region": "RegionOne",
                            "interface": "public",
                            "id": "2dad48f09e2a447a9bf852bcd93548cf"
                        }
                    ],
                    "id": "2dad48f09e2a447a9bf852bcd93548cf",
                    "type": "image",
                    "name": "glance"
                },
                {
                    "endpoints": [
                        {
                            "url": "http://%s:%s/v1/%s" % (get_host(request), self.api.port + 3004, user['id']),
                            "region": "RegionOne",
                            "interface": "public",
                            "id": "2dad48f09e2a447a9bf852bcd93548bf"
                        }
                    ],
                    "id": "2dad48f09e2a447a9bf852bcd93548bf",
                    "type": "orchestration",
                    "name": "heat"
                }
            ]
            return Response(json.dumps(ret), status=201, mimetype='application/json')

        except Exception as ex:
            logging.exception("Keystone: Get token failed.")
            return ex.message, 500
