#!/usr/bin/env python

# Copyright (c) 2017 Okinawa Open Laboratory and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0

# pylint: disable=missing-docstring

"""vrouter testcase implementation."""

import logging
import os
import time

from cloudify_rest_client import CloudifyClient
from cloudify_rest_client.executions import Execution
from scp import SCPClient

from functest.opnfv_tests.openstack.snaps import snaps_utils
import functest.opnfv_tests.vnf.router.vrouter_base as vrouter_base
from functest.opnfv_tests.vnf.router.utilvnf import Utilvnf
from functest.utils.constants import CONST
from functest.utils import functest_utils

from git import Repo

from snaps.config.flavor import FlavorConfig
from snaps.config.image import ImageConfig
from snaps.config.keypair import KeypairConfig
from snaps.config.network import NetworkConfig, PortConfig, SubnetConfig
from snaps.config.router import RouterConfig
from snaps.config.security_group import (
    Direction, Protocol, SecurityGroupConfig, SecurityGroupRuleConfig)
from snaps.config.vm_inst import FloatingIpConfig, VmInstanceConfig

from snaps.openstack.create_flavor import OpenStackFlavor
from snaps.openstack.create_image import OpenStackImage
from snaps.openstack.create_instance import OpenStackVmInstance
from snaps.openstack.create_keypairs import OpenStackKeypair
from snaps.openstack.create_network import OpenStackNetwork
from snaps.openstack.create_security_group import OpenStackSecurityGroup
from snaps.openstack.create_router import OpenStackRouter

import snaps.openstack.utils.glance_utils as glance_utils
from snaps.openstack.utils import keystone_utils


__author__ = "Shuya Nakama <shuya.nakama@okinawaopenlabs.org>"


class CloudifyVrouter(vrouter_base.VrouterOnBoardingBase):
    # pylint: disable=too-many-instance-attributes
    """vrouter testcase deployed with Cloudify Orchestrator."""

    __logger = logging.getLogger(__name__)
    name = __name__

    def __init__(self, **kwargs):
        if "case_name" not in kwargs:
            kwargs["case_name"] = "vyos_vrouter"
        super(CloudifyVrouter, self).__init__(**kwargs)

        # Retrieve the configuration
        try:
            self.config = getattr(
                CONST, 'vnf_{}_config'.format(self.case_name))
        except Exception:
            raise Exception("VNF config file not found")

        self.cfy_manager_ip = ''
        self.util_info = {}
        self.deployment_name = ''

        config_file = os.path.join(self.case_dir, self.config)
        self.orchestrator = dict(
            requirements=functest_utils.get_parameter_from_yaml(
                "orchestrator.requirements", config_file),
        )
        self.details['orchestrator'] = dict(
            name=functest_utils.get_parameter_from_yaml(
                "orchestrator.name", config_file),
            version=functest_utils.get_parameter_from_yaml(
                "orchestrator.version", config_file),
            status='ERROR',
            result=''
        )
        self.__logger.debug("Orchestrator configuration %s", self.orchestrator)
        self.__logger.debug("name = %s", self.name)
        self.vnf = dict(
            descriptor=functest_utils.get_parameter_from_yaml(
                "vnf.descriptor", config_file),
            inputs=functest_utils.get_parameter_from_yaml(
                "vnf.inputs", config_file),
            requirements=functest_utils.get_parameter_from_yaml(
                "vnf.requirements", config_file)
        )
        self.details['vnf'] = dict(
            descriptor_version=self.vnf['descriptor']['version'],
            name=functest_utils.get_parameter_from_yaml(
                "vnf.name", config_file),
            version=functest_utils.get_parameter_from_yaml(
                "vnf.version", config_file),
        )
        self.__logger.debug("VNF configuration: %s", self.vnf)

        self.util = Utilvnf()

        self.details['test_vnf'] = dict(
            name=functest_utils.get_parameter_from_yaml(
                "vnf_test_suite.name", config_file),
            version=functest_utils.get_parameter_from_yaml(
                "vnf_test_suite.version", config_file)
        )
        self.images = functest_utils.get_parameter_from_yaml(
            "tenant_images", config_file)
        self.__logger.info("Images needed for vrouter: %s", self.images)

    @staticmethod
    def run_blocking_ssh_command(ssh, cmd,
                                 error_msg="Unable to run this command"):
        """Command to run ssh command with the exit status."""
        (_, stdout, stderr) = ssh.exec_command(cmd)
        CloudifyVrouter.__logger.debug("SSH %s stdout: %s", cmd, stdout.read())
        if stdout.channel.recv_exit_status() != 0:
            CloudifyVrouter.__logger.error(
                "SSH %s stderr: %s", cmd, stderr.read())
            raise Exception(error_msg)

    def prepare(self):
        super(CloudifyVrouter, self).prepare()
        self.__logger.info("Additional pre-configuration steps")
        self.util.set_credentials(self.snaps_creds)
        self.__logger.info("Upload some OS images if it doesn't exist")
        for image_name, image_file in self.images.iteritems():
            self.__logger.info("image: %s, file: %s", image_name, image_file)
            if image_file and image_name:
                image_creator = OpenStackImage(
                    self.snaps_creds,
                    ImageConfig(
                        name=image_name, image_user='cloud',
                        img_format='qcow2', image_file=image_file))
                image_creator.create()
                self.created_object.append(image_creator)

    def deploy_orchestrator(self):
        # pylint: disable=too-many-locals,too-many-statements
        """
        Deploy Cloudify Manager.
        network, security group, fip, VM creation
        """
        # network creation
        start_time = time.time()
        self.__logger.info("Creating keypair ...")
        kp_file = os.path.join(self.data_dir, "cloudify_vrouter.pem")
        keypair_settings = KeypairConfig(
            name='cloudify_vrouter_kp-{}'.format(self.uuid),
            private_filepath=kp_file)
        keypair_creator = OpenStackKeypair(self.snaps_creds, keypair_settings)
        keypair_creator.create()
        self.created_object.append(keypair_creator)

        self.__logger.info("Creating full network ...")
        subnet_settings = SubnetConfig(
            name='cloudify_vrouter_subnet-{}'.format(self.uuid),
            cidr='10.67.79.0/24')
        network_settings = NetworkConfig(
            name='cloudify_vrouter_network-{}'.format(self.uuid),
            subnet_settings=[subnet_settings])
        network_creator = OpenStackNetwork(self.snaps_creds, network_settings)
        network_creator.create()
        self.created_object.append(network_creator)
        ext_net_name = snaps_utils.get_ext_net_name(self.snaps_creds)
        router_creator = OpenStackRouter(
            self.snaps_creds,
            RouterConfig(
                name='cloudify_vrouter_router-{}'.format(self.uuid),
                external_gateway=ext_net_name,
                internal_subnets=[subnet_settings.name]))
        router_creator.create()
        self.created_object.append(router_creator)

        # security group creation
        self.__logger.info("Creating security group for cloudify manager vm")
        sg_rules = list()
        sg_rules.append(
            SecurityGroupRuleConfig(
                sec_grp_name="sg-cloudify-manager-{}".format(self.uuid),
                direction=Direction.ingress,
                protocol=Protocol.tcp, port_range_min=1,
                port_range_max=65535))
        sg_rules.append(
            SecurityGroupRuleConfig(
                sec_grp_name="sg-cloudify-manager-{}".format(self.uuid),
                direction=Direction.ingress,
                protocol=Protocol.udp, port_range_min=1,
                port_range_max=65535))

        security_group_creator = OpenStackSecurityGroup(
            self.snaps_creds,
            SecurityGroupConfig(
                name="sg-cloudify-manager-{}".format(self.uuid),
                rule_settings=sg_rules))

        security_group_creator.create()
        self.created_object.append(security_group_creator)

        # orchestrator VM flavor
        self.__logger.info("Get or create flavor for cloudify manager vm ...")

        flavor_settings = FlavorConfig(
            name=self.orchestrator['requirements']['flavor']['name'],
            ram=self.orchestrator['requirements']['flavor']['ram_min'],
            disk=50, vcpus=2)
        flavor_creator = OpenStackFlavor(self.snaps_creds, flavor_settings)
        flavor_creator.create()
        self.created_object.append(flavor_creator)
        image_settings = ImageConfig(
            name=self.orchestrator['requirements']['os_image'],
            image_user='centos', exists=True)

        port_settings = PortConfig(
            name='cloudify_manager_port-{}'.format(self.uuid),
            network_name=network_settings.name)

        manager_settings = VmInstanceConfig(
            name='cloudify_manager-{}'.format(self.uuid),
            flavor=flavor_settings.name,
            port_settings=[port_settings],
            security_group_names=[
                security_group_creator.sec_grp_settings.name],
            floating_ip_settings=[FloatingIpConfig(
                name='cloudify_manager_fip-{}'.format(self.uuid),
                port_name=port_settings.name,
                router_name=router_creator.router_settings.name)])

        manager_creator = OpenStackVmInstance(
            self.snaps_creds, manager_settings, image_settings,
            keypair_settings)

        self.__logger.info("Creating cloudify manager VM")
        manager_creator.create()
        self.created_object.append(manager_creator)

        cfy_client = CloudifyClient(
            host=manager_creator.get_floating_ip().ip,
            username='admin', password='admin', tenant='default_tenant')

        self.orchestrator['object'] = cfy_client

        self.cfy_manager_ip = manager_creator.get_floating_ip().ip

        self.__logger.info("Attemps running status of the Manager")
        cfy_status = None
        retry = 10
        while str(cfy_status) != 'running' and retry:
            try:
                cfy_status = cfy_client.manager.get_status()['status']
                self.__logger.debug("The current manager status is %s",
                                    cfy_status)
            except Exception:  # pylint: disable=broad-except
                self.__logger.exception(
                    "Cloudify Manager isn't up and running. Retrying ...")
            retry = retry - 1
            time.sleep(30)

        if str(cfy_status) == 'running':
            self.__logger.info("Cloudify Manager is up and running")
        else:
            raise Exception("Cloudify Manager isn't up and running")

        duration = time.time() - start_time

        self.__logger.info("Put private keypair in manager")
        if manager_creator.vm_ssh_active(block=True):
            ssh = manager_creator.ssh_client()
            scp = SCPClient(ssh.get_transport(), socket_timeout=15.0)
            scp.put(kp_file, '~/')
            cmd = "sudo cp ~/cloudify_vrouter.pem /etc/cloudify/"
            self.run_blocking_ssh_command(ssh, cmd)
            cmd = "sudo chmod 444 /etc/cloudify/cloudify_vrouter.pem"
            self.run_blocking_ssh_command(ssh, cmd)
            cmd = "sudo yum install -y gcc python-devel"
            self.run_blocking_ssh_command(
                ssh, cmd, "Unable to install packages on manager")

        self.details['orchestrator'].update(status='PASS', duration=duration)

        self.vnf['inputs'].update(dict(external_network_name=ext_net_name))

        return True

    def deploy_vnf(self):
        start_time = time.time()

        self.__logger.info("Upload VNFD")
        cfy_client = self.orchestrator['object']
        descriptor = self.vnf['descriptor']
        self.deployment_name = descriptor.get('name')

        vrouter_blueprint_dir = os.path.join(
            self.data_dir, self.util.blueprint_dir)
        if not os.path.exists(vrouter_blueprint_dir):
            Repo.clone_from(
                descriptor.get('url'), vrouter_blueprint_dir,
                branch=descriptor.get('version'))

        cfy_client.blueprints.upload(
            vrouter_blueprint_dir + self.util.blueprint_file_name,
            descriptor.get('name'))

        self.__logger.info("Get or create flavor for vrouter")
        flavor_settings = FlavorConfig(
            name=self.vnf['requirements']['flavor']['name'],
            ram=self.vnf['requirements']['flavor']['ram_min'],
            disk=25, vcpus=1)
        flavor_creator = OpenStackFlavor(self.snaps_creds, flavor_settings)
        flavor = flavor_creator.create()
        self.created_object.append(flavor_creator)

        # set image name
        glance = glance_utils.glance_client(self.snaps_creds)
        image = glance_utils.get_image(glance, "vyos1.1.7")

        self.vnf['inputs'].update(dict(target_vnf_image_id=image.id))
        self.vnf['inputs'].update(dict(reference_vnf_image_id=image.id))
        self.vnf['inputs'].update(dict(target_vnf_flavor_id=flavor.id))
        self.vnf['inputs'].update(dict(reference_vnf_flavor_id=flavor.id))
        self.vnf['inputs'].update(dict(
            keystone_username=self.snaps_creds.username))
        self.vnf['inputs'].update(dict(
            keystone_password=self.snaps_creds.password))
        self.vnf['inputs'].update(dict(
            keystone_tenant_name=self.snaps_creds.project_name))
        self.vnf['inputs'].update(dict(
            region=self.snaps_creds.region_name))
        self.vnf['inputs'].update(dict(
            keystone_url=keystone_utils.get_endpoint(
                self.snaps_creds, 'identity')))

        self.__logger.info("Create VNF Instance")
        cfy_client.deployments.create(
            descriptor.get('name'), descriptor.get('name'),
            self.vnf.get('inputs'))

        wait_for_execution(
            cfy_client, get_execution_id(cfy_client, descriptor.get('name')),
            self.__logger, timeout=7200)

        self.__logger.info("Start the VNF Instance deployment")
        execution = cfy_client.executions.start(descriptor.get('name'),
                                                'install')
        # Show execution log
        execution = wait_for_execution(cfy_client, execution, self.__logger)

        duration = time.time() - start_time

        self.__logger.info(execution)
        if execution.status == 'terminated':
            self.details['vnf'].update(status='PASS', duration=duration)
            result = True
        else:
            self.details['vnf'].update(status='FAIL', duration=duration)
            result = False
        return result

    def test_vnf(self):
        cfy_client = self.orchestrator['object']
        credentials = {"snaps_creds": self.snaps_creds,
                       "username": self.snaps_creds.username,
                       "password": self.snaps_creds.password,
                       "auth_url": self.snaps_creds.auth_url,
                       "tenant_name": self.snaps_creds.project_name}

        self.util_info = {"credentials": credentials,
                          "cfy": cfy_client,
                          "vnf_data_dir": self.util.vnf_data_dir}

        start_time = time.time()

        result, test_result_data = super(CloudifyVrouter, self).test_vnf()

        duration = time.time() - start_time

        if result:
            self.details['test_vnf'].update(
                status='PASS', result='OK', full_result=test_result_data,
                duration=duration)
        else:
            self.details['test_vnf'].update(
                status='FAIL', result='NG', full_result=test_result_data,
                duration=duration)

        return True

    def clean(self):
        try:
            cfy_client = self.orchestrator['object']
            dep_name = self.vnf['descriptor'].get('name')
            # kill existing execution
            self.__logger.info('Deleting the current deployment')
            exec_list = cfy_client.executions.list(dep_name)
            for execution in exec_list:
                if execution['status'] == "started":
                    try:
                        cfy_client.executions.cancel(
                            execution['id'], force=True)
                    except Exception:  # pylint: disable=broad-except
                        self.__logger.warn("Can't cancel the current exec")

            execution = cfy_client.executions.start(
                dep_name, 'uninstall', parameters=dict(ignore_failure=True))

            wait_for_execution(cfy_client, execution, self.__logger)
            cfy_client.deployments.delete(self.vnf['descriptor'].get('name'))
            cfy_client.blueprints.delete(self.vnf['descriptor'].get('name'))
        except Exception:  # pylint: disable=broad-except
            self.__logger.warn("Some issue during the undeployment ..")
            self.__logger.warn("Tenant clean continue ..")
        super(CloudifyVrouter, self).clean()

    def get_vnf_info_list(self, target_vnf_name):
        return self.util.get_vnf_info_list(
            self.cfy_manager_ip, self.deployment_name, target_vnf_name)


def wait_for_execution(client, execution, logger, timeout=7200, ):
    """Wait for a workflow execution on Cloudify Manager."""
    # if execution already ended - return without waiting
    if execution.status in Execution.END_STATES:
        return execution

    if timeout is not None:
        deadline = time.time() + timeout

    # Poll for execution status and execution logs, until execution ends
    # and we receive an event of type in WORKFLOW_END_TYPES
    offset = 0
    batch_size = 50
    event_list = []
    execution_ended = False
    while True:
        event_list = client.events.list(
            execution_id=execution.id, _offset=offset, _size=batch_size,
            include_logs=False, sort='@timestamp').items

        offset = offset + len(event_list)
        for event in event_list:
            logger.debug(event.get('message'))

        if timeout is not None:
            if time.time() > deadline:
                raise RuntimeError(
                    'execution of operation {0} for deployment {1} '
                    'timed out'.format(execution.workflow_id,
                                       execution.deployment_id))
            else:
                # update the remaining timeout
                timeout = deadline - time.time()

        if not execution_ended:
            execution = client.executions.get(execution.id)
            execution_ended = execution.status in Execution.END_STATES

        if execution_ended:
            break

        time.sleep(5)

    return execution


def get_execution_id(client, deployment_id):
    """
    Get the execution id of a env preparation.
    network, security group, fip, VM creation
    """
    executions = client.executions.list(deployment_id=deployment_id)
    for execution in executions:
        if execution.workflow_id == 'create_deployment_environment':
            return execution
    raise RuntimeError('Failed to get create_deployment_environment '
                       'workflow execution.'
                       'Available executions: {0}'.format(executions))