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# SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# 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 typing import Optional

from ..._utils import pad_vocab_size
from ...functional import (Tensor, concat, maximum, minimum, recv, send, shape,
                           slice)
from ...layers import (AttentionMaskType, CogVLMAttention, ColumnLinear,
                       Embedding, GatedMLP, PromptTuningEmbedding, RmsNorm)
from ...mapping import Mapping
from ...module import Module
# this is to use to module global algo string with a quant_algo prefix
from ...quantization import QuantMode
from ...top_model_mixin import TopModelMixin
from ..modeling_utils import (DecoderLayerList, DecoderModelForCausalLM,
                              QuantConfig)
from .config import CogVLMConfig


class CogvlmDecoderLayer(Module):

    def __init__(self, config: CogVLMConfig, layer_idx: int):
        super().__init__()
        self.layer_idx = layer_idx
        self.config = config

        self.input_layernorm = RmsNorm(normalized_shape=config.hidden_size,
                                       eps=config.norm_epsilon,
                                       dtype=config.dtype)

        layers_range = config.mapping.pp_layers(config.num_hidden_layers)
        local_layer_idx = layer_idx - layers_range[0]
        self.attention = CogVLMAttention(
            local_layer_idx=local_layer_idx,
            hidden_size=config.hidden_size,
            num_attention_heads=config.num_attention_heads,
            num_kv_heads=config.num_key_value_heads,
            max_position_embeddings=config.max_position_embeddings,
            dtype=config.dtype,
            attention_mask_type=AttentionMaskType.causal,
            bias=config.attn_bias,
            rotary_embedding_base=config.rotary_base,
            rotary_embedding_scaling=config.rotary_scaling,
            tp_group=config.mapping.tp_group,
            tp_size=config.mapping.tp_size,
            tp_rank=config.mapping.tp_rank,
            vision_start=config.vision_start,
            vision_length=config.vision_length,
            quant_mode=config.quant_mode)

        mlp_hidden_size = config.hidden_size * 4 if config.intermediate_size is None else config.intermediate_size

        self.vision_start = config.vision_start
        self.vision_length = config.vision_length
        self.hidden_size = config.hidden_size
        self.mlp = GatedMLP(hidden_size=config.hidden_size,
                            ffn_hidden_size=mlp_hidden_size,
                            hidden_act=config.hidden_act,
                            dtype=config.dtype,
                            bias=config.mlp_bias,
                            tp_group=config.mapping.tp_group,
                            tp_size=config.mapping.tp_size,
                            quant_mode=config.quant_mode)
        self.vis_mlp = GatedMLP(hidden_size=config.hidden_size,
                                ffn_hidden_size=mlp_hidden_size,
                                hidden_act=config.hidden_act,
                                dtype=config.dtype,
                                bias=config.mlp_bias,
                                tp_group=config.mapping.tp_group,
                                tp_size=config.mapping.tp_size,
                                quant_mode=config.quant_mode)
        self.post_layernorm = RmsNorm(normalized_shape=config.hidden_size,
                                      eps=config.norm_epsilon,
                                      dtype=config.dtype)

    def forward(self,
                hidden_states,
                attention_mask=None,
                use_cache=False,
                kv_cache_params=None,
                attention_params=None,
                lora_layer_params=None):
        residual = hidden_states
        hidden_states = self.input_layernorm(hidden_states)

        attention_output = self.attention(hidden_states,
                                          use_cache=use_cache,
                                          kv_cache_params=kv_cache_params,
                                          attention_params=attention_params)

        if use_cache:
            attention_output, presents = attention_output

        hidden_states = residual + attention_output

        residual = hidden_states
        hidden_states = self.post_layernorm(hidden_states)

        bs = shape(hidden_states, 0)
        seq_length = shape(hidden_states, 1)
        bos = slice(hidden_states, [0, 0, 0],
                    concat([bs, self.vision_start, self.hidden_size]))
        vis_seq_length = minimum(self.vision_length + 1, seq_length - 1)
        vision_hidden_states = slice(
            hidden_states, [0, self.vision_start, 0],
            concat([bs, vis_seq_length, self.hidden_size]))
        text_seq_length = maximum(
            0, seq_length - (self.vision_length + 1 + self.vision_start))
        language_hidden_states = slice(
            hidden_states, [0, self.vision_length + 1 + self.vision_start, 0],
            concat([bs, text_seq_length, self.hidden_size]))

        bos_qkv = self.mlp(bos)
        language_qkv = self.mlp(language_hidden_states)
        vision_qkv = self.vis_mlp(vision_hidden_states)
        hidden_states = concat([bos_qkv, vision_qkv, language_qkv], dim=1)

        # hidden_states = self.mlp(hidden_states,
        #                          lora_layer_params=lora_layer_params)

        hidden_states = residual + hidden_states
        if use_cache:
            return (hidden_states, presents)
        return hidden_states


class CogvlmModel(Module):

    def __init__(self, config: CogVLMConfig) -> None:
        super().__init__()

        self.mapping = config.mapping
        self.use_prompt_tuning = config.use_prompt_tuning
        EmbeddingCls = PromptTuningEmbedding if config.use_prompt_tuning else Embedding
        if self.mapping.is_first_pp_rank():
            self.vocab_embedding = EmbeddingCls(
                num_embeddings=config.vocab_size,
                embedding_dim=config.hidden_size,
                dtype=config.dtype,
                tp_size=self.mapping.tp_size
                if config.use_parallel_embedding else 1,
                tp_group=self.mapping.tp_group
                if config.use_parallel_embedding else None,
                sharding_dim=config.embedding_sharding_dim,
                tp_rank=self.mapping.tp_rank,
            )

        self.layers = DecoderLayerList(CogvlmDecoderLayer, config)

        if self.mapping.is_last_pp_rank():
            self.ln_f = RmsNorm(normalized_shape=config.hidden_size,
                                eps=config.norm_epsilon,
                                dtype=config.dtype)

    def forward(self,
                input_ids,
                position_ids=None,
                use_cache=False,
                attention_mask=None,
                kv_cache_params=None,
                attention_params=None,
                hidden_states=None,
                prompt_embedding_table: Optional[Tensor] = None,
                prompt_tasks: Optional[Tensor] = None,
                prompt_vocab_size: Optional[Tensor] = None,
                lora_params=None):

        kv_cache_params.fill_none_tensor_list(len(self.layers))

        if use_cache:
            presents = []

        ptuning_args = [
            prompt_embedding_table, prompt_tasks, prompt_vocab_size
        ] if self.use_prompt_tuning else []

        if self.mapping.is_first_pp_rank():
            hidden_states = self.vocab_embedding(input_ids, *ptuning_args)
        else:
            hidden_states = recv(hidden_states, self.mapping.prev_pp_rank())

        hidden_states = self.layers.forward(hidden_states,
                                            use_cache=use_cache,
                                            attention_mask=attention_mask,
                                            kv_cache_params=kv_cache_params,
                                            attention_params=attention_params,
                                            lora_params=lora_params)

        if use_cache:
            hidden_states, presents = hidden_states

        if self.mapping.is_last_pp_rank():
            hidden_states = self.ln_f(hidden_states)
        else:
            hidden_states = send(hidden_states, self.mapping.next_pp_rank())

        if use_cache:
            return (hidden_states, tuple(presents))
        return hidden_states


class CogVLMForCausalLM(DecoderModelForCausalLM, TopModelMixin):
    config_class = CogVLMConfig

    def __init__(self, config: CogVLMConfig):
        transformer = CogvlmModel(config)
        vocab_size_padded = pad_vocab_size(config.vocab_size,
                                           config.mapping.tp_size)
        if config.mapping.is_last_pp_rank():
            lm_head = ColumnLinear(config.hidden_size,
                                   vocab_size_padded,
                                   bias=False,
                                   dtype=config.dtype,
                                   tp_group=config.mapping.tp_group,
                                   tp_size=config.mapping.tp_size,
                                   gather_output=True)
        else:
            lm_head = None
        self.quant_mode = config.quant_mode
        self.mapping = config.mapping
        super().__init__(config, transformer, lm_head)

    @classmethod
    def from_hugging_face(cls,
                          hf_model_dir,
                          dtype='float16',
                          mapping: Optional[Mapping] = None,
                          quant_mode: Optional[QuantMode] = None,
                          **kwargs):
        pass

    def default_plugin_config(self, **kwargs):
        plugin_config = super().default_plugin_config(**kwargs)
        if self.quant_mode.is_int4_weight_only_per_group():
            plugin_config.weight_only_groupwise_quant_matmul_plugin = 'auto'
        return plugin_config

    @classmethod
    def quantize(
        cls,
        hf_model_dir,
        output_dir,
        quant_config: QuantConfig,
        *,
        dtype='float16',
        mapping: Optional[Mapping] = None,
        calib_batches=512,
        calib_batch_size=1,
        random_seed=1234,
        tokenizer_max_seq_length=2048,
        **kwargs,
    ):
        pass

	# SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
	# SPDX-License-Identifier: Apache-2.0
	#
	# 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 typing import Optional

	from ..._utils import pad_vocab_size
	from ...functional import (Tensor, concat, maximum, minimum, recv, send, shape,
	slice)
	from ...layers import (AttentionMaskType, CogVLMAttention, ColumnLinear,
	Embedding, GatedMLP, PromptTuningEmbedding, RmsNorm)
	from ...mapping import Mapping
	from ...module import Module
	# this is to use to module global algo string with a quant_algo prefix
	from ...quantization import QuantMode
	from ...top_model_mixin import TopModelMixin
	from ..modeling_utils import (DecoderLayerList, DecoderModelForCausalLM,
	QuantConfig)
	from .config import CogVLMConfig


	class CogvlmDecoderLayer(Module):

	def __init__(self, config: CogVLMConfig, layer_idx: int):
	super().__init__()
	self.layer_idx = layer_idx
	self.config = config

	self.input_layernorm = RmsNorm(normalized_shape=config.hidden_size,
	eps=config.norm_epsilon,
	dtype=config.dtype)

	layers_range = config.mapping.pp_layers(config.num_hidden_layers)
	local_layer_idx = layer_idx - layers_range[0]
	self.attention = CogVLMAttention(
	local_layer_idx=local_layer_idx,
	hidden_size=config.hidden_size,
	num_attention_heads=config.num_attention_heads,
	num_kv_heads=config.num_key_value_heads,
	max_position_embeddings=config.max_position_embeddings,
	dtype=config.dtype,
	attention_mask_type=AttentionMaskType.causal,
	bias=config.attn_bias,
	rotary_embedding_base=config.rotary_base,
	rotary_embedding_scaling=config.rotary_scaling,
	tp_group=config.mapping.tp_group,
	tp_size=config.mapping.tp_size,
	tp_rank=config.mapping.tp_rank,
	vision_start=config.vision_start,
	vision_length=config.vision_length,
	quant_mode=config.quant_mode)

	mlp_hidden_size = config.hidden_size * 4 if config.intermediate_size is None else config.intermediate_size

	self.vision_start = config.vision_start
	self.vision_length = config.vision_length
	self.hidden_size = config.hidden_size
	self.mlp = GatedMLP(hidden_size=config.hidden_size,
	ffn_hidden_size=mlp_hidden_size,
	hidden_act=config.hidden_act,
	dtype=config.dtype,
	bias=config.mlp_bias,
	tp_group=config.mapping.tp_group,
	tp_size=config.mapping.tp_size,
	quant_mode=config.quant_mode)
	self.vis_mlp = GatedMLP(hidden_size=config.hidden_size,
	ffn_hidden_size=mlp_hidden_size,
	hidden_act=config.hidden_act,
	dtype=config.dtype,
	bias=config.mlp_bias,
	tp_group=config.mapping.tp_group,
	tp_size=config.mapping.tp_size,
	quant_mode=config.quant_mode)
	self.post_layernorm = RmsNorm(normalized_shape=config.hidden_size,
	eps=config.norm_epsilon,
	dtype=config.dtype)

	def forward(self,
	hidden_states,
	attention_mask=None,
	use_cache=False,
	kv_cache_params=None,
	attention_params=None,
	lora_layer_params=None):
	residual = hidden_states
	hidden_states = self.input_layernorm(hidden_states)

	attention_output = self.attention(hidden_states,
	use_cache=use_cache,
	kv_cache_params=kv_cache_params,
	attention_params=attention_params)

	if use_cache:
	attention_output, presents = attention_output

	hidden_states = residual + attention_output

	residual = hidden_states
	hidden_states = self.post_layernorm(hidden_states)

	bs = shape(hidden_states, 0)
	seq_length = shape(hidden_states, 1)
	bos = slice(hidden_states, [0, 0, 0],
	concat([bs, self.vision_start, self.hidden_size]))
	vis_seq_length = minimum(self.vision_length + 1, seq_length - 1)
	vision_hidden_states = slice(
	hidden_states, [0, self.vision_start, 0],
	concat([bs, vis_seq_length, self.hidden_size]))
	text_seq_length = maximum(
	0, seq_length - (self.vision_length + 1 + self.vision_start))
	language_hidden_states = slice(
	hidden_states, [0, self.vision_length + 1 + self.vision_start, 0],
	concat([bs, text_seq_length, self.hidden_size]))

	bos_qkv = self.mlp(bos)
	language_qkv = self.mlp(language_hidden_states)
	vision_qkv = self.vis_mlp(vision_hidden_states)
	hidden_states = concat([bos_qkv, vision_qkv, language_qkv], dim=1)

	# hidden_states = self.mlp(hidden_states,
	# lora_layer_params=lora_layer_params)

	hidden_states = residual + hidden_states
	if use_cache:
	return (hidden_states, presents)
	return hidden_states


	class CogvlmModel(Module):

	def __init__(self, config: CogVLMConfig) -> None:
	super().__init__()

	self.mapping = config.mapping
	self.use_prompt_tuning = config.use_prompt_tuning
	EmbeddingCls = PromptTuningEmbedding if config.use_prompt_tuning else Embedding
	if self.mapping.is_first_pp_rank():
	self.vocab_embedding = EmbeddingCls(
	num_embeddings=config.vocab_size,
	embedding_dim=config.hidden_size,
	dtype=config.dtype,
	tp_size=self.mapping.tp_size
	if config.use_parallel_embedding else 1,
	tp_group=self.mapping.tp_group
	if config.use_parallel_embedding else None,
	sharding_dim=config.embedding_sharding_dim,
	tp_rank=self.mapping.tp_rank,
	)

	self.layers = DecoderLayerList(CogvlmDecoderLayer, config)

	if self.mapping.is_last_pp_rank():
	self.ln_f = RmsNorm(normalized_shape=config.hidden_size,
	eps=config.norm_epsilon,
	dtype=config.dtype)

	def forward(self,
	input_ids,
	position_ids=None,
	use_cache=False,
	attention_mask=None,
	kv_cache_params=None,
	attention_params=None,
	hidden_states=None,
	prompt_embedding_table: Optional[Tensor] = None,
	prompt_tasks: Optional[Tensor] = None,
	prompt_vocab_size: Optional[Tensor] = None,
	lora_params=None):

	kv_cache_params.fill_none_tensor_list(len(self.layers))

	if use_cache:
	presents = []

	ptuning_args = [
	prompt_embedding_table, prompt_tasks, prompt_vocab_size
	] if self.use_prompt_tuning else []

	if self.mapping.is_first_pp_rank():
	hidden_states = self.vocab_embedding(input_ids, *ptuning_args)
	else:
	hidden_states = recv(hidden_states, self.mapping.prev_pp_rank())

	hidden_states = self.layers.forward(hidden_states,
	use_cache=use_cache,
	attention_mask=attention_mask,
	kv_cache_params=kv_cache_params,
	attention_params=attention_params,
	lora_params=lora_params)

	if use_cache:
	hidden_states, presents = hidden_states

	if self.mapping.is_last_pp_rank():
	hidden_states = self.ln_f(hidden_states)
	else:
	hidden_states = send(hidden_states, self.mapping.next_pp_rank())

	if use_cache:
	return (hidden_states, tuple(presents))
	return hidden_states


	class CogVLMForCausalLM(DecoderModelForCausalLM, TopModelMixin):
	config_class = CogVLMConfig

	def __init__(self, config: CogVLMConfig):
	transformer = CogvlmModel(config)
	vocab_size_padded = pad_vocab_size(config.vocab_size,
	config.mapping.tp_size)
	if config.mapping.is_last_pp_rank():
	lm_head = ColumnLinear(config.hidden_size,
	vocab_size_padded,
	bias=False,
	dtype=config.dtype,
	tp_group=config.mapping.tp_group,
	tp_size=config.mapping.tp_size,
	gather_output=True)
	else:
	lm_head = None
	self.quant_mode = config.quant_mode
	self.mapping = config.mapping
	super().__init__(config, transformer, lm_head)

	@classmethod
	def from_hugging_face(cls,
	hf_model_dir,
	dtype='float16',
	mapping: Optional[Mapping] = None,
	quant_mode: Optional[QuantMode] = None,
	**kwargs):
	pass

	def default_plugin_config(self, **kwargs):
	plugin_config = super().default_plugin_config(**kwargs)
	if self.quant_mode.is_int4_weight_only_per_group():
	plugin_config.weight_only_groupwise_quant_matmul_plugin = 'auto'
	return plugin_config

	@classmethod
	def quantize(
	cls,
	hf_model_dir,
	output_dir,
	quant_config: QuantConfig,
	*,
	dtype='float16',
	mapping: Optional[Mapping] = None,
	calib_batches=512,
	calib_batch_size=1,
	random_seed=1234,
	tokenizer_max_seq_length=2048,
	**kwargs,
	):
	pass