# coding=utf-8
# Copyright 2025 HuggingFace Inc.
#
# 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,
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import unittest

from diffusers import AutoencoderKLKVAE

from ...testing_utils import enable_full_determinism, floats_tensor, torch_device
from ..test_modeling_common import ModelTesterMixin
from .testing_utils import AutoencoderTesterMixin


enable_full_determinism()


class AutoencoderKLKVAETests(ModelTesterMixin, AutoencoderTesterMixin, unittest.TestCase):
    model_class = AutoencoderKLKVAE
    main_input_name = "sample"
    base_precision = 1e-2

    def get_autoencoder_kl_kvae_config(self):
        return {
            "in_channels": 3,
            "channels": 32,
            "num_enc_blocks": 1,
            "num_dec_blocks": 1,
            "z_channels": 4,
            "double_z": True,
            "ch_mult": (1, 2),
            "sample_size": 32,
        }

    @property
    def dummy_input(self):
        batch_size = 2
        num_channels = 3
        sizes = (32, 32)

        image = floats_tensor((batch_size, num_channels) + sizes).to(torch_device)

        return {"sample": image}

    @property
    def input_shape(self):
        return (3, 32, 32)

    @property
    def output_shape(self):
        return (3, 32, 32)

    def prepare_init_args_and_inputs_for_common(self):
        init_dict = self.get_autoencoder_kl_kvae_config()
        inputs_dict = self.dummy_input
        return init_dict, inputs_dict

    def test_gradient_checkpointing_is_applied(self):
        expected_set = {
            "KVAEEncoder2D",
            "KVAEDecoder2D",
        }
        super().test_gradient_checkpointing_is_applied(expected_set=expected_set)