# Copyright 2026 Sperid Labs and The HuggingFace Team. 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 diffusers.configuration_utils import FrozenDict
from diffusers.modular_pipelines.modular_pipeline_utils import ComponentSpec
from diffusers.schedulers import FlowMatchEulerDiscreteScheduler

from .gaussian_decoder_idol import IdolGaussianDecoderModel
from .octree_decoder_idol import IdolOctreeDecoderModel
from .transformer_idol import IdolTransformerModel

# The converted weights. The model classes come from this repo, so the weights repo holds no code and loads without
# `trust_remote_code`. Load from elsewhere with
# `pipe.load_components(pretrained_model_name_or_path={"transformer": ..., "octree_decoder": ..., ...})`.
IDOL_WEIGHTS_REPO = "OzzyGT/idol_diffusers"


def transformer_spec() -> ComponentSpec:
    return ComponentSpec(
        "transformer", IdolTransformerModel, pretrained_model_name_or_path=IDOL_WEIGHTS_REPO, subfolder="transformer"
    )


def octree_decoder_spec() -> ComponentSpec:
    return ComponentSpec(
        "octree_decoder",
        IdolOctreeDecoderModel,
        pretrained_model_name_or_path=IDOL_WEIGHTS_REPO,
        subfolder="octree_decoder",
    )


def gaussian_decoder_spec() -> ComponentSpec:
    return ComponentSpec(
        "gaussian_decoder",
        IdolGaussianDecoderModel,
        pretrained_model_name_or_path=IDOL_WEIGHTS_REPO,
        subfolder="gaussian_decoder",
    )


def scheduler_spec() -> ComponentSpec:
    # shift 3.0 is the reference's time shift (`rescale_t`)
    return ComponentSpec(
        "scheduler",
        FlowMatchEulerDiscreteScheduler,
        config=FrozenDict({"shift": 3.0}),
        default_creation_method="from_config",
    )