# Copyright 2024 Google LLC
#
# 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.

"""Check for running a Pipeline Parallelism straggler detection test on a cluster."""

import click

import common
import check
import gke_check

NAME = 'straggler'
_DESCRIPTION = (
    'Runs a Pipeline Parallelism straggler detection test on a cluster.'
)


def get_check_for_orchestrator(
    orchestrator: str,
    machine_type: str,
    nodes: list[str],
    run_only_on_available_nodes: bool,
    dry_run: bool = False,
) -> check.Check:
  """Returns the appropriate check for the given orchestrator."""
  match orchestrator:
    case 'gke':
      return GkeStragglerCheck(
          machine_type=machine_type,
          nodes=nodes,
          run_only_on_available_nodes=run_only_on_available_nodes,
          dry_run=dry_run,
      )
    case _:
      raise ValueError(f'Unsupported orchestrator: {orchestrator}')


class GkeStragglerCheck(gke_check.GkeCheck):
  """Runs a Pipeline Parallelism Straggler Detection test on a cluster."""

  # Explicitly exclude not supported machine types
  _SUPPORTED_MACHINE_TYPES = frozenset(
      machine_type
      for machine_type in common.SUPPORTED_MACHINE_TYPES
      if machine_type not in ['a4-highgpu-8g']
  )

  launch_label = 'aiinfra/straggler-healthcheck-test'

  results_labels = [
      'aiinfra/straggler-healthcheck-runtime-sec',
  ]

  def __init__(
      self,
      machine_type: str,
      nodes: list[str],
      run_only_on_available_nodes: bool = False,
      dry_run: bool = False,
      **kwargs,
  ):
    super().__init__(
        name=NAME,
        description=_DESCRIPTION,
        machine_type=machine_type,
        supported_machine_types=self._SUPPORTED_MACHINE_TYPES,
        launch_label=self.launch_label,
        results_labels=self.results_labels,
        nodes=nodes,
        run_only_on_available_nodes=run_only_on_available_nodes,
        timeout_sec=15 * 60,
        dry_run=dry_run,
        container_name='straggler-detection-test',
        **kwargs,
    )

  def get_check_pod(self) -> str | None:
    """Get the name of the canonical pod for the check."""
    pod_names = [
        pod.metadata.name
        for pod in self._v1.list_pod_for_all_namespaces().items
        if 'chs-hc-straggler-node0' in pod.metadata.name
    ]
    pod = None
    if pod_names:
      pod = pod_names[0]
    return pod

  def clean_up(self):
    if self.check_logs:
      last_line = self.check_logs.splitlines()[-1]
      if 'Results at' in last_line:
        click.echo(last_line)
    super().clean_up()