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#                          modular_paddleocr_vl.py file directly. One of our CI enforces this.
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# Copyright 2025 The PaddlePaddle Team and The HuggingFace Inc. team. All rights reserved.
#
# This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
# and OPT implementations in this library. It has been modified from its
# original forms to accommodate minor architectural differences compared
# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
#
# 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.

import inspect

from huggingface_hub.dataclasses import strict

from ...configuration_utils import PreTrainedConfig
from ...modeling_rope_utils import RopeParameters
from ...utils import auto_docstring


@auto_docstring(checkpoint="PaddlePaddle/PaddleOCR-VL")
@strict
class PaddleOCRVisionConfig(PreTrainedConfig):
    r"""
    Example:

    ```python
    >>> from transformers import PaddleOCRVisionConfig, PaddleOCRVisionModel

    >>> # Initializing a PaddleOCRVisionConfig with PaddlePaddle/PaddleOCR-VL style configuration
    >>> configuration = PaddleOCRVisionConfig()

    >>> # Initializing a PaddleOCRVisionModel (with random weights) from the PaddlePaddle/PaddleOCR-VL style configuration
    >>> model = PaddleOCRVisionModel(configuration)

    >>> # Accessing the model configuration
    >>> configuration = model.config
    ```
    """

    model_type = "paddleocr_vl_vision"
    base_config_key = "vision_config"

    hidden_size: int = 1152
    intermediate_size: int = 4304
    num_hidden_layers: int = 27
    num_attention_heads: int = 16
    num_channels: int = 3
    image_size: int = 384
    patch_size: int = 14
    hidden_act: str = "gelu_pytorch_tanh"
    layer_norm_eps: float = 1e-6
    attention_dropout: float | int = 0.0
    spatial_merge_size: int = 2


@auto_docstring(checkpoint="PaddlePaddle/PaddleOCR-VL")
@strict
class PaddleOCRTextConfig(PreTrainedConfig):
    r"""
    use_bias (`bool`, *optional*, defaults to `False`):
        Whether to use a bias in any of the projections including mlp and attention for example.

    Example:

    ```python
    >>> from transformers import PaddleOCRTextModel, PaddleOCRTextConfig

    >>> # Initializing a PaddleOCRText 0.3B style configuration
    >>> configuration = PaddleOCRTextConfig()

    >>> # Initializing a model from the 0.3B style configuration
    >>> model = PaddleOCRTextModel(configuration)

    >>> # Accessing the model configuration
    >>> configuration = model.config
    ```"""

    model_type = "paddleocr_vl_text"
    keys_to_ignore_at_inference = ["past_key_values"]
    default_theta = 500000.0
    # Default tensor parallel plan for base model `PaddleOCRTextModel`
    base_model_tp_plan = {
        "layers.*.self_attn.q_proj": "colwise",
        "layers.*.self_attn.k_proj": "colwise",
        "layers.*.self_attn.v_proj": "colwise",
        "layers.*.self_attn.o_proj": "rowwise",
        "layers.*.mlp.gate_proj": "colwise",
        "layers.*.mlp.up_proj": "colwise",
        "layers.*.mlp.down_proj": "rowwise",
    }
    base_model_pp_plan = {
        "embed_tokens": (["input_ids"], ["inputs_embeds"]),
        "layers": (["hidden_states", "attention_mask"], ["hidden_states"]),
        "norm": (["hidden_states"], ["hidden_states"]),
    }

    vocab_size: int = 103424
    hidden_size: int = 1024
    intermediate_size: int = 3072
    num_hidden_layers: int = 18
    num_attention_heads: int = 16
    num_key_value_heads: int | None = 2
    hidden_act: str = "silu"
    max_position_embeddings: int = 131072
    initializer_range: float = 0.02
    rms_norm_eps: float = 1e-05
    use_cache: bool | None = True
    pad_token_id: int | None = 0
    bos_token_id: int | None = 1
    eos_token_id: int | list[int] | None = 2
    tie_word_embeddings: bool = True
    rope_parameters: RopeParameters | dict | None = None
    use_bias: bool | None = False
    head_dim: int | None = 128

    def __post_init__(self, **kwargs):
        if self.num_key_value_heads is None:
            self.num_key_value_heads = self.num_attention_heads

        self.head_dim = self.head_dim if self.head_dim is not None else self.hidden_size // self.num_attention_heads
        super().__post_init__(**kwargs)


@auto_docstring(checkpoint="PaddlePaddle/PaddleOCR-VL")
@strict
class PaddleOCRVLConfig(PreTrainedConfig):
    r"""
    Example:

    ```python
    >>> from transformers import PaddleOCRVLForConditionalGeneration, PaddleOCRVLConfig

    >>> # Initializing a PaddleOCRVL style configuration
    >>> configuration = PaddleOCRVLConfig()

    >>> # Initializing a model from the PaddleOCRVL style configuration
    >>> model = PaddleOCRVLForConditionalGeneration(configuration)

    >>> # Accessing the model configuration
    >>> configuration = model.config
    ```"""

    model_type = "paddleocr_vl"

    sub_configs = {"vision_config": PaddleOCRVisionConfig, "text_config": PaddleOCRTextConfig}
    keys_to_ignore_at_inference = ["past_key_values"]

    text_config: dict | PreTrainedConfig | None = None
    vision_config: dict | PreTrainedConfig | None = None

    image_token_id: int = 100295
    video_token_id: int = 100296
    vision_start_token_id: int = 101305
    vision_end_token_id: int = 101306
    tie_word_embeddings: bool = True

    def __post_init__(self, **kwargs):
        if isinstance(self.vision_config, dict):
            self.vision_config = self.sub_configs["vision_config"](**self.vision_config)
        elif self.vision_config is None:
            self.vision_config = self.sub_configs["vision_config"]()

        # Hub configs are saved as flat dicts so we pop some of kwargs to init `TextConfig`
        text_params = inspect.signature(self.sub_configs["text_config"].__init__).parameters.keys()
        text_params = list(text_params) + ["rope_parameters", "rope_scaling", "rope_theta"]
        text_kwargs = {key: kwargs.pop(key) for key in text_params if key in kwargs}

        if isinstance(self.text_config, dict):
            self.text_config = self.sub_configs["text_config"](**self.text_config)
        elif self.text_config is None:
            # Hub configs are saved as flat dicts so we pop some of kwargs to init `TextConfig`
            text_kwargs["dtype"] = kwargs.get("torch_dtype", kwargs.get("dtype"))  # don't pop the dtype
            self.text_config = self.sub_configs["text_config"](**text_kwargs)

        super().__post_init__(**kwargs)


__all__ = ["PaddleOCRVLConfig", "PaddleOCRVisionConfig", "PaddleOCRTextConfig"]
