# Copyright Commonwealth of Australia, Bureau of Meteorology 2024.
#
# 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 pyearthtools.utils

from pyearthtools.pipeline import Operation
from pyearthtools.data import Index


pyearthtools.utils.config.set({"pipeline.run_parallel": False})


class FakeIndex(Index):
    """Simply returns the `idx` or `override`."""

    def __init__(self, override: int | None = None):
        self._overrideValue = override
        super().__init__()

    def get(self, idx):
        return self._overrideValue or idx


class MultiplicationOperation(Operation):
    def __init__(self, factor):
        super().__init__(split_tuples=True)
        self.factor = factor

    def apply_func(self, sample):
        return sample * self.factor

    def undo_func(self, sample):
        return sample // self.factor


class MultiplicationOperationUnunifiedable(MultiplicationOperation):
    def undo_func(self, sample):
        return sample + self.factor
