# Copyright The PyTorch Lightning team.
#
# 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 typing import Any

from torch.utils.data import Dataset

from flash.core.data.io.input import DataKeys, Input


class PointCloudObjectDetectorDatasetInput(Input):
    def load_data(self, dataset: Dataset) -> Any:
        self.dataset = dataset
        return range(len(self.dataset))

    def load_sample(self, index: int) -> Any:
        sample = self.dataset[index]
        return {
            DataKeys.INPUT: sample["data"],
            DataKeys.METADATA: sample["attr"],
        }
