# -*- coding: utf-8 -*- #
# Copyright 2015 Google Inc. 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.

"""Utilities for building the dataproc clusters CLI."""


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

from googlecloudsdk.api_lib.dataproc import dataproc as dp
from googlecloudsdk.api_lib.dataproc import util
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.util.args import labels_util
from googlecloudsdk.core import log


class JobSubmitter(base.Command):
  """Submit a job to a cluster."""

  def __init__(self, *args, **kwargs):
    super(JobSubmitter, self).__init__(*args, **kwargs)

  @staticmethod
  def Args(parser):
    """Register flags for this command."""
    labels_util.AddCreateLabelsFlags(parser)
    parser.add_argument(
        '--max-failures-per-hour',
        type=int,
        help=('Specifies maximum number of times a job can be restarted in '
              'event of failure. Expressed as a per-hour rate. '
              'Default is 0 (no failure retries).'))
    parser.add_argument(
        '--cluster',
        required=True,
        help='The Dataproc cluster to submit the job to.')

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

    request_id = util.GetUniqueId()
    job_id = args.id if args.id else request_id

    job_ref = util.ParseJob(job_id, dataproc)

    self.PopulateFilesByType(args)

    cluster_ref = util.ParseCluster(args.cluster, dataproc)
    request = dataproc.messages.DataprocProjectsRegionsClustersGetRequest(
        projectId=cluster_ref.projectId,
        region=cluster_ref.region,
        clusterName=cluster_ref.clusterName)

    cluster = dataproc.client.projects_regions_clusters.Get(request)

    self._staging_dir = self.GetStagingDir(
        cluster, job_ref.jobId, bucket=args.bucket)
    self.ValidateAndStageFiles()

    job = dataproc.messages.Job(
        reference=dataproc.messages.JobReference(
            projectId=job_ref.projectId,
            jobId=job_ref.jobId),
        placement=dataproc.messages.JobPlacement(
            clusterName=args.cluster))
    self.ConfigureJob(dataproc.messages, job, args)

    if args.max_failures_per_hour:
      scheduling = dataproc.messages.JobScheduling(
          maxFailuresPerHour=args.max_failures_per_hour)
      job.scheduling = scheduling

    request = dataproc.messages.DataprocProjectsRegionsJobsSubmitRequest(
        projectId=job_ref.projectId,
        region=job_ref.region,
        submitJobRequest=dataproc.messages.SubmitJobRequest(
            job=job,
            requestId=request_id))

    job = dataproc.client.projects_regions_jobs.Submit(request)

    log.status.Print('Job [{0}] submitted.'.format(job_id))

    if not args.async:
      job = util.WaitForJobTermination(
          dataproc,
          job,
          message='Waiting for job completion',
          goal_state=dataproc.messages.JobStatus.StateValueValuesEnum.DONE,
          stream_driver_log=True)
      log.status.Print('Job [{0}] finished successfully.'.format(job_id))

    return job

  @staticmethod
  def ConfigureJob(messages, job, args):
    """Add type-specific job configuration to job message."""
    # Parse labels (if present)
    job.labels = labels_util.ParseCreateArgs(args, messages.Job.LabelsValue)


@base.ReleaseTracks(base.ReleaseTrack.BETA)
class JobSubmitterBeta(JobSubmitter):
  """Submit a job to a cluster."""

  @staticmethod
  def Args(parser):
    JobSubmitter.Args(parser)

  @staticmethod
  def ConfigureJob(messages, job, args):
    # Configure Restartable job.
    super(JobSubmitterBeta, JobSubmitterBeta).ConfigureJob(messages, job, args)
