# 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
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"""
Provides the base class for all Column Selection tasks
"""

from abc import ABC
from typing import Any

from nl2sql.datasets.base import Database
from nl2sql.tasks import BaseResult, BaseTask


class BaseColumnSelectionResult(BaseResult, ABC):
    """
    The core class for all Column Selection Task Results
    """

    resulttype: str = "Result.ColumnSelection"
    db_name: str
    question: str
    available_columns: set[str]
    selected_columns: set[str]
    intermediate_steps: list[Any]


class BaseColumnSelectionTask(BaseTask, ABC):
    """
    The core class for all Column Selection Tasks
    """

    tasktype: str = "Task.ColumnSelection"

    def __call__(self, db: Database, question: str) -> BaseColumnSelectionResult:
        raise NotImplementedError