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# Copyright 2026 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 huggingface_hub.dataclasses import strict

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


@auto_docstring(checkpoint="zai-org/GLM-5")
@strict
class GlmMoeDsaConfig(PreTrainedConfig):
    r"""
    n_group (`int`, *optional*, defaults to 1):
        Number of groups for routed experts.
    mlp_layer_types (`list`, *optional*):
        MLP type pattern for each layer (`"dense"` or `"sparse"`). Defaults to 3 dense + rest sparse.
    index_topk (`int`, *optional*, defaults to 2048):
        Number of top tokens selected by the indexer for sparse attention.
    index_head_dim (`int`, *optional*, defaults to 128):
        Head dimension for the indexer projections (DSA).
    index_n_heads (`int | None`, *optional*, defaults to 32):
        Number of heads for the indexer projections (DSA).

    ```python
    >>> from transformers import GlmMoeDsaConfig, GlmMoeDsaModel

    >>> # Initializing a GLM-MoE-DSA configuration
    >>> configuration = GlmMoeDsaConfig()

    >>> # Initializing a model from the configuration
    >>> model = GlmMoeDsaModel(configuration)

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

    model_type = "glm_moe_dsa"
    keys_to_ignore_at_inference = ["past_key_values"]

    base_model_tp_plan = {
        "layers.*.self_attn.q_b_proj": "colwise",
        "layers.*.self_attn.kv_a_proj_with_mqa": "mla_kv_a_proj",
        "layers.*.self_attn.kv_b_proj": "colwise",
        "layers.*.self_attn.o_proj": "rowwise",
        "layers.*.mlp.experts.gate_up_proj": "packed_colwise",
        "layers.*.mlp.experts.down_proj": "rowwise",
        "layers.*.mlp.experts": "moe_tp_experts",
        "layers.*.mlp.shared_experts.gate_proj": "colwise",
        "layers.*.mlp.shared_experts.up_proj": "colwise",
        "layers.*.mlp.shared_experts.down_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"]),
    }
    attribute_map = {
        "num_local_experts": "n_routed_experts",
        "head_dim": "qk_rope_head_dim",
    }

    vocab_size: int = 154880

    hidden_size: int = 6144
    intermediate_size: int = 12288
    moe_intermediate_size: int = 2048
    num_hidden_layers: int = 78
    num_attention_heads: int = 64
    num_key_value_heads: int = 64
    n_shared_experts: int = 1
    n_routed_experts: int = 256
    routed_scaling_factor: float = 2.5
    kv_lora_rank: int = 512
    q_lora_rank: int = 2048
    qk_rope_head_dim: int = 64
    v_head_dim: int = 256
    qk_nope_head_dim: int = 192
    n_group: int = 1
    topk_group: int = 1
    num_experts_per_tok: int = 8
    norm_topk_prob: bool = True
    hidden_act: str = "silu"
    max_position_embeddings: int = 202752
    initializer_range: float = 0.02
    rms_norm_eps: float = 1e-5
    use_cache: bool = True
    pad_token_id: int | None = None
    bos_token_id: int | None = 0
    eos_token_id: int | list[int] | None = 1
    tie_word_embeddings: bool = False
    rope_parameters: RopeParameters | dict | None = None
    mlp_layer_types: list[str] | None = None
    attention_bias: bool = False
    attention_dropout: float | int = 0.0
    index_topk: int = 2048
    index_head_dim: int = 128
    index_n_heads: int = 32

    def __post_init__(self, **kwargs):
        self.qk_head_dim = self.qk_nope_head_dim + self.qk_rope_head_dim

        # MLP layer types: first 3 dense, rest sparse
        if self.mlp_layer_types is None:
            self.mlp_layer_types = ["dense"] * min(3, self.num_hidden_layers) + ["sparse"] * (
                self.num_hidden_layers - 3
            )
        super().__post_init__(**kwargs)


__all__ = ["GlmMoeDsaConfig"]
