# Copyright 2026 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.

from __future__ import annotations

import logging
from typing import Optional

from ..errors.not_found_error import NotFoundError
from .eval_case import EvalCase
from .eval_set import EvalSet
from .eval_sets_manager import EvalSetsManager

logger = logging.getLogger("google_adk." + __name__)


def get_eval_set_from_app_and_id(
    eval_sets_manager: EvalSetsManager, app_name: str, eval_set_id: str
) -> EvalSet:
  """Returns an EvalSet if found; otherwise, raises NotFoundError."""
  eval_set = eval_sets_manager.get_eval_set(app_name, eval_set_id)
  if not eval_set:
    raise NotFoundError(f"Eval set `{eval_set_id}` not found.")
  return eval_set


def get_eval_case_from_eval_set(
    eval_set: EvalSet, eval_case_id: str
) -> Optional[EvalCase]:
  """Returns an EvalCase if found; otherwise, None."""
  eval_case_to_find = None

  # Look up the eval case by eval_case_id
  for eval_case in eval_set.eval_cases:
    if eval_case.eval_id == eval_case_id:
      eval_case_to_find = eval_case
      break

  return eval_case_to_find


def add_eval_case_to_eval_set(
    eval_set: EvalSet, eval_case: EvalCase
) -> EvalSet:
  """Adds an eval case to an eval set and returns the updated eval set."""
  eval_case_id = eval_case.eval_id

  if [x for x in eval_set.eval_cases if x.eval_id == eval_case_id]:
    raise ValueError(
        f"Eval id `{eval_case_id}` already exists in `{eval_set.eval_set_id}`"
        " eval set.",
    )

  eval_set.eval_cases.append(eval_case)
  return eval_set


def update_eval_case_in_eval_set(
    eval_set: EvalSet, updated_eval_case: EvalCase
) -> EvalSet:
  """Updates an eval case in an eval set and returns the updated eval set."""
  # Find the eval case to be updated.
  eval_case_id = updated_eval_case.eval_id
  eval_case_to_update = get_eval_case_from_eval_set(eval_set, eval_case_id)

  if not eval_case_to_update:
    raise NotFoundError(
        f"Eval case `{eval_case_id}` not found in eval set"
        f" `{eval_set.eval_set_id}`."
    )

  # Remove the existing eval case and add the updated eval case.
  eval_set.eval_cases.remove(eval_case_to_update)
  eval_set.eval_cases.append(updated_eval_case)
  return eval_set


def delete_eval_case_from_eval_set(
    eval_set: EvalSet, eval_case_id: str
) -> EvalSet:
  """Deletes an eval case from an eval set and returns the updated eval set."""
  # Find the eval case to be deleted.
  eval_case_to_delete = get_eval_case_from_eval_set(eval_set, eval_case_id)

  if not eval_case_to_delete:
    raise NotFoundError(
        f"Eval case `{eval_case_id}` not found in eval set"
        f" `{eval_set.eval_set_id}`."
    )

  # Remove the existing eval case.
  logger.info(
      "EvalCase`%s` was found in the eval set. It will be removed permanently.",
      eval_case_id,
  )
  eval_set.eval_cases.remove(eval_case_to_delete)
  return eval_set
