# -*- coding: utf-8 -*- #
# Copyright 2021 Google LLC. 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.
"""Create Pub/Sub trigger command."""

from __future__ import absolute_import
from __future__ import division
from __future__ import unicode_literals

from googlecloudsdk.api_lib.cloudbuild import cloudbuild_util
from googlecloudsdk.api_lib.cloudbuild import trigger_config as trigger_utils
from googlecloudsdk.calliope import base
from googlecloudsdk.core import log
from googlecloudsdk.core import properties
from googlecloudsdk.core import resources


class CreatePubSub(base.CreateCommand):
  """Create a build trigger with a Pub/Sub trigger event."""

  detailed_help = {
      'EXAMPLES':
          """\
            To create a Pub/Sub trigger that listens to topic `my-topic` and builds off branch `my-branch` in a GitHub repository named `my-repo`:

              $ {command} --name=my-pubsub-trigger --service-account="projects/my-project/serviceAccounts/my-byosa@my-project.iam.gserviceaccount.com" --topic=projects/my-project/topics/my-topic --repo=https://www.github.com/owner/repo --repo-type=GITHUB --branch=my-branch

            To create a Pub/Sub trigger that listens to topic `my-topic` and builds off branch `my-branch` in a 2nd-gen GitHub repository resource:

              $ {command} --name=my-pubsub-trigger --service-account="projects/my-project/serviceAccounts/my-byosa@my-project.iam.gserviceaccount.com" --repository=projects/my-proj/locations/us-west1/connections/my-conn/repositories/my-repo --branch=my-branch
          """,
  }

  @staticmethod
  def Args(parser):
    """Register flags for this command.

    Args:
      parser: An argparse.ArgumentParser-like object.
    """

    flag_config = trigger_utils.AddTriggerArgs(parser)
    flag_config.add_argument(
        '--topic',
        help='The topic to which this trigger should subscribe.',
        required=True)
    trigger_utils.AddBuildConfigArgs(flag_config)
    trigger_utils.AddGitRepoSource(flag_config)
    trigger_utils.AddFilterArg(flag_config)

  def Run(self, args):
    """This is what gets called when the user runs this command.

    Args:
      args: An argparse namespace. All the arguments that were provided to this
        command invocation.

    Returns:
      The newly created trigger.
    """

    client = cloudbuild_util.GetClientInstance()
    messages = cloudbuild_util.GetMessagesModule()

    trigger = messages.BuildTrigger()
    if args.trigger_config:
      trigger = cloudbuild_util.LoadMessageFromPath(
          path=args.trigger_config,
          msg_type=messages.BuildTrigger,
          msg_friendly_name='build trigger config',
          skip_camel_case=['substitutions'])
    else:
      trigger = ParseTriggerFromFlags(args)

    # Send the Create request
    project = properties.VALUES.core.project.Get(required=True)
    regionprop = properties.VALUES.builds.region.Get()
    location = args.region or regionprop or cloudbuild_util.DEFAULT_REGION
    parent = resources.REGISTRY.Create(
        collection='cloudbuild.projects.locations',
        projectsId=project,
        locationsId=location).RelativeName()
    created_trigger = client.projects_locations_triggers.Create(
        messages.CloudbuildProjectsLocationsTriggersCreateRequest(
            parent=parent, buildTrigger=trigger))

    trigger_resource = resources.REGISTRY.Parse(
        None,
        collection='cloudbuild.projects.locations.triggers',
        api_version='v1',
        params={
            'projectsId': project,
            'locationsId': location,
            'triggersId': created_trigger.id,
        })
    log.CreatedResource(trigger_resource)

    return created_trigger


def ParseTriggerFromFlags(args):
  """Parse arguments into a BuildTrigger proto.

  Args:
    args: An argparse.Namespace. All the arguments that were provided to this
      command invocation.

  Returns:
    A BuildTrigger proto object.
  """
  messages = cloudbuild_util.GetMessagesModule()

  trigger, done = trigger_utils.ParseTriggerArgs(args, messages)
  if done:
    return trigger

  trigger.name = args.name
  trigger.pubsubConfig = messages.PubsubConfig(topic=args.topic)

  # Build Config
  project = properties.VALUES.core.project.Get(required=True)
  default_image = 'gcr.io/%s/gcb-%s:$COMMIT_SHA' % (project, args.name)
  trigger_utils.ParseBuildConfigArgs(
      trigger, args, messages, default_image, need_repo=True)

  trigger.filter = args.subscription_filter

  return trigger