# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# 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 ppcls.data.preprocess.ops.autoaugment import ImageNetPolicy as RawImageNetPolicy
from ppcls.data.preprocess.ops.randaugment import RandAugment as RawRandAugment
from ppcls.data.preprocess.ops.cutout import Cutout

from ppcls.data.preprocess.ops.hide_and_seek import HideAndSeek
from ppcls.data.preprocess.ops.random_erasing import RandomErasing
from ppcls.data.preprocess.ops.grid import GridMask

from ppcls.data.preprocess.ops.operators import DecodeImage
from ppcls.data.preprocess.ops.operators import ResizeImage
from ppcls.data.preprocess.ops.operators import CropImage
from ppcls.data.preprocess.ops.operators import RandCropImage
from ppcls.data.preprocess.ops.operators import RandFlipImage
from ppcls.data.preprocess.ops.operators import NormalizeImage
from ppcls.data.preprocess.ops.operators import ToCHWImage
from ppcls.data.preprocess.ops.operators import AugMix

from ppcls.data.preprocess.batch_ops.batch_operators import MixupOperator, CutmixOperator, FmixOperator

import six
import numpy as np
from PIL import Image


def transform(data, ops=[]):
    """ transform """
    for op in ops:
        data = op(data)
    return data


class AutoAugment(RawImageNetPolicy):
    """ ImageNetPolicy wrapper to auto fit different img types """
    def __init__(self, *args, **kwargs):
        if six.PY2:
            super(AutoAugment, self).__init__(*args, **kwargs)
        else:
            super().__init__(*args, **kwargs)

    def __call__(self, img):
        if not isinstance(img, Image.Image):
            img = np.ascontiguousarray(img)
            img = Image.fromarray(img)

        if six.PY2:
            img = super(AutoAugment, self).__call__(img)
        else:
            img = super().__call__(img)

        if isinstance(img, Image.Image):
            img = np.asarray(img)

        return img


class RandAugment(RawRandAugment):
    """ RandAugment wrapper to auto fit different img types """
    def __init__(self, *args, **kwargs):
        if six.PY2:
            super(RandAugment, self).__init__(*args, **kwargs)
        else:
            super().__init__(*args, **kwargs)

    def __call__(self, img):
        if not isinstance(img, Image.Image):
            img = np.ascontiguousarray(img)
            img = Image.fromarray(img)

        if six.PY2:
            img = super(RandAugment, self).__call__(img)
        else:
            img = super().__call__(img)

        if isinstance(img, Image.Image):
            img = np.asarray(img)

        return img
