
# Note: if you intend to run this script make sure you look under scripts/fsmt/
# to locate the appropriate script to do the work correctly. There is a set of scripts to:
# - download and prepare data and run the conversion script
# - perform eval to get the best hparam into the config
# - generate model_cards - useful if you have multiple models from the same paper

import argparse
import json
import os
import re
from collections import OrderedDict
from os.path import basename, dirname

import fairseq
import torch
from fairseq import hub_utils
from fairseq.data.dictionary import Dictionary

from transformers import FSMTConfig, FSMTForConditionalGeneration
from transformers.models.fsmt.tokenization_fsmt import VOCAB_FILES_NAMES
from transformers.tokenization_utils_base import TOKENIZER_CONFIG_FILE
from transformers.utils import WEIGHTS_NAME, logging


logging.set_verbosity_warning()

A		: Optional[Any]								=     2

# based on the results of a search on a range of `num_beams`, `length_penalty` and `early_stopping`
# values against wmt19 test data to obtain the best BLEU scores, we will use the following defaults:
#
# * `num_beams`: 5 (higher scores better, but requires more memory/is slower, can be adjusted by users)
# * `early_stopping`: `False` consistently scored better
# * `length_penalty` varied, so will assign the best one depending on the model
A		: Union[str, Any]								=     {
    # fairseq:
    '''wmt19-ru-en''': {'''length_penalty''': 1.1},
    '''wmt19-en-ru''': {'''length_penalty''': 1.15},
    '''wmt19-en-de''': {'''length_penalty''': 1.0},
    '''wmt19-de-en''': {'''length_penalty''': 1.1},
    # allenai:
    '''wmt16-en-de-dist-12-1''': {'''length_penalty''': 0.6},
    '''wmt16-en-de-dist-6-1''': {'''length_penalty''': 0.6},
    '''wmt16-en-de-12-1''': {'''length_penalty''': 0.8},
    '''wmt19-de-en-6-6-base''': {'''length_penalty''': 0.6},
    '''wmt19-de-en-6-6-big''': {'''length_penalty''': 0.6},
}

# this remaps the different models to their organization names
A		: Optional[Any]								=     {}
for m in ["wmt19-ru-en", "wmt19-en-ru", "wmt19-en-de", "wmt19-de-en"]:
		A		: Dict								=     '''facebook'''
for m in [
    "wmt16-en-de-dist-12-1",
    "wmt16-en-de-dist-6-1",
    "wmt16-en-de-12-1",
    "wmt19-de-en-6-6-base",
    "wmt19-de-en-6-6-big",
]:
		A		: Union[str, Any]								=     '''allenai'''




def 	UpperCamelCase__  (     SCREAMING_SNAKE_CASE_	:	str       )  ->     Optional[int]:
						# (1) remove word breaking symbol, (2) add word ending symbol where the word is not broken up,
						# e.g.: d = {'le@@': 5, 'tt@@': 6, 'er': 7} => {'le': 5, 'tt': 6, 'er</w>': 7}
						_lowercase					       =					dict((re.sub(r"""@@$"""		,   """"""		,   SCREAMING_SNAKE_CASE_       ), v) if k.endswith("""@@"""       ) else (re.sub(r"""$"""		,   """</w>"""		,   SCREAMING_SNAKE_CASE_       ), v) for k, v in d.items()       )
						_lowercase					       =					"""<s> <pad> </s> <unk>""".split()
						# restore the special tokens
						for k in keep_keys:
												del da[f"""{k}</w>"""]
												_lowercase					       =					d[k]  # restore
						return da




def 	UpperCamelCase__  (     SCREAMING_SNAKE_CASE_	:	Dict		,   SCREAMING_SNAKE_CASE_	:	Optional[int]       )  ->     Tuple:
						# prep
						assert os.path.exists(SCREAMING_SNAKE_CASE_       )
						os.makedirs(SCREAMING_SNAKE_CASE_		,   exist_ok=SCREAMING_SNAKE_CASE_       )
						print(f"""Writing results to {pytorch_dump_folder_path}"""       )

						# handle various types of models

						_lowercase					       =					basename(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					dirname(SCREAMING_SNAKE_CASE_       )

						_lowercase					       =					fairseq.model_parallel.models.transformer.ModelParallelTransformerModel
						_lowercase					       =					cls.hub_models()
						_lowercase					       =					{"""bpe""": """fastbpe""", """tokenizer""": """moses"""}
						_lowercase					       =					"""."""
						# note: since the model dump is old, fairseq has upgraded its model some
						# time later, and it does a whole lot of rewrites and splits on the saved
						# weights, therefore we can't use torch.load() directly on the model file.
						# see: upgrade_state_dict(state_dict) in fairseq_model.py
						print(f"""using checkpoint {checkpoint_file}"""       )
						_lowercase					       =					hub_utils.from_pretrained(
						    SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_		,   archive_map=SCREAMING_SNAKE_CASE_		,   **SCREAMING_SNAKE_CASE_       )

						_lowercase					       =					vars(chkpt["""args"""]["""model"""]       )

						_lowercase					       =					args["""source_lang"""]
						_lowercase					       =					args["""target_lang"""]

						_lowercase					       =					dirname(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					basename(SCREAMING_SNAKE_CASE_       )

						# dicts
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   f"""dict.{src_lang}.txt"""       )
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   f"""dict.{tgt_lang}.txt"""       )

						_lowercase					       =					Dictionary.load(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					rewrite_dict_keys(src_dict.indices       )
						_lowercase					       =					len(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   """vocab-src.json"""       )
						print(f"""Generating {src_vocab_file} of {src_vocab_size} of {src_lang} records"""       )
						with open(SCREAMING_SNAKE_CASE_		,   """w"""		,   encoding="""utf-8"""       ) as f:
												f.write(json.dumps(SCREAMING_SNAKE_CASE_		,   ensure_ascii=SCREAMING_SNAKE_CASE_		,   indent=SCREAMING_SNAKE_CASE_       )       )

						# detect whether this is a do_lower_case situation, which can be derived by checking whether we
						# have at least one uppercase letter in the source vocab
						_lowercase					       =					True
						for k in src_vocab.keys():
												if not k.islower():
																		_lowercase					       =					False
																		break

						_lowercase					       =					Dictionary.load(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					rewrite_dict_keys(tgt_dict.indices       )
						_lowercase					       =					len(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   """vocab-tgt.json"""       )
						print(f"""Generating {tgt_vocab_file} of {tgt_vocab_size} of {tgt_lang} records"""       )
						with open(SCREAMING_SNAKE_CASE_		,   """w"""		,   encoding="""utf-8"""       ) as f:
												f.write(json.dumps(SCREAMING_SNAKE_CASE_		,   ensure_ascii=SCREAMING_SNAKE_CASE_		,   indent=SCREAMING_SNAKE_CASE_       )       )

						# merges_file (bpecodes)
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   VOCAB_FILES_NAMES["""merges_file"""]       )
						for fn in ["bpecodes", "code"]:  # older fairseq called the merges file "code"
												_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_       )
												if os.path.exists(SCREAMING_SNAKE_CASE_       ):
																		break
						with open(SCREAMING_SNAKE_CASE_		,   encoding="""utf-8"""       ) as fin:
												_lowercase					       =					fin.read()
						_lowercase					       =					re.sub(r""" \d+$"""		,   """"""		,   SCREAMING_SNAKE_CASE_		,   0		,   re.M       )  # remove frequency number
						print(f"""Generating {merges_file}"""       )
						with open(SCREAMING_SNAKE_CASE_		,   """w"""		,   encoding="""utf-8"""       ) as fout:
												fout.write(SCREAMING_SNAKE_CASE_       )

						# model config
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   """config.json"""       )

						# validate bpe/tokenizer config, as currently it's hardcoded to moses+fastbpe -
						# may have to modify the tokenizer if a different type is used by a future model
						assert args["bpe"] == "fastbpe", f"""need to extend tokenizer to support bpe={args["bpe"]}"""
						assert args["tokenizer"] == "moses", f"""need to extend tokenizer to support bpe={args["tokenizer"]}"""

						_lowercase					       =					{
						    """architectures""": ["""FSMTForConditionalGeneration"""],
						    """model_type""": """fsmt""",
						    """activation_dropout""": args["""activation_dropout"""],
						    """activation_function""": """relu""",
						    """attention_dropout""": args["""attention_dropout"""],
						    """d_model""": args["""decoder_embed_dim"""],
						    """dropout""": args["""dropout"""],
						    """init_std""": 0.02,
						    """max_position_embeddings""": args["""max_source_positions"""],
						    """num_hidden_layers""": args["""encoder_layers"""],
						    """src_vocab_size""": src_vocab_size,
						    """tgt_vocab_size""": tgt_vocab_size,
						    """langs""": [src_lang, tgt_lang],
						    """encoder_attention_heads""": args["""encoder_attention_heads"""],
						    """encoder_ffn_dim""": args["""encoder_ffn_embed_dim"""],
						    """encoder_layerdrop""": args["""encoder_layerdrop"""],
						    """encoder_layers""": args["""encoder_layers"""],
						    """decoder_attention_heads""": args["""decoder_attention_heads"""],
						    """decoder_ffn_dim""": args["""decoder_ffn_embed_dim"""],
						    """decoder_layerdrop""": args["""decoder_layerdrop"""],
						    """decoder_layers""": args["""decoder_layers"""],
						    """bos_token_id""": 0,
						    """pad_token_id""": 1,
						    """eos_token_id""": 2,
						    """is_encoder_decoder""": True,
						    """scale_embedding""": not args["""no_scale_embedding"""],
						    """tie_word_embeddings""": args["""share_all_embeddings"""],
						}

						# good hparam defaults to start with
						_lowercase					       =					5
						_lowercase					       =					False
						if model_dir in best_score_hparams and "length_penalty" in best_score_hparams[model_dir]:
												_lowercase					       =					best_score_hparams[model_dir]["""length_penalty"""]
						else:
												_lowercase					       =					1.0

						print(f"""Generating {fsmt_model_config_file}"""       )
						with open(SCREAMING_SNAKE_CASE_		,   """w"""		,   encoding="""utf-8"""       ) as f:
												f.write(json.dumps(SCREAMING_SNAKE_CASE_		,   ensure_ascii=SCREAMING_SNAKE_CASE_		,   indent=SCREAMING_SNAKE_CASE_       )       )

						# tokenizer config
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_       )

						_lowercase					       =					{
						    """langs""": [src_lang, tgt_lang],
						    """model_max_length""": 10_24,
						    """do_lower_case""": do_lower_case,
						}

						print(f"""Generating {fsmt_tokenizer_config_file}"""       )
						with open(SCREAMING_SNAKE_CASE_		,   """w"""		,   encoding="""utf-8"""       ) as f:
												f.write(json.dumps(SCREAMING_SNAKE_CASE_		,   ensure_ascii=SCREAMING_SNAKE_CASE_		,   indent=SCREAMING_SNAKE_CASE_       )       )

						# model
						_lowercase					       =					chkpt["""models"""][0]
						_lowercase					       =					model.state_dict()

						# rename keys to start with 'model.'
						_lowercase					       =					OrderedDict(("""model.""" + k, v) for k, v in model_state_dict.items()       )

						# remove unneeded keys
						_lowercase					       =					[
						    """model.model""",
						    """model.encoder.version""",
						    """model.decoder.version""",
						    """model.encoder_embed_tokens.weight""",
						    """model.decoder_embed_tokens.weight""",
						    """model.encoder.embed_positions._float_tensor""",
						    """model.decoder.embed_positions._float_tensor""",
						]
						for k in ignore_keys:
												model_state_dict.pop(SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_       )

						_lowercase					       =					FSMTConfig.from_pretrained(SCREAMING_SNAKE_CASE_       )
						_lowercase					       =					FSMTForConditionalGeneration(SCREAMING_SNAKE_CASE_       )

						# check that it loads ok
						model_new.load_state_dict(SCREAMING_SNAKE_CASE_		,   strict=SCREAMING_SNAKE_CASE_       )

						# save
						_lowercase					       =					os.path.join(SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_       )
						print(f"""Generating {pytorch_weights_dump_path}"""       )
						torch.save(SCREAMING_SNAKE_CASE_		,   SCREAMING_SNAKE_CASE_       )

						print("""Conversion is done!"""       )
						print("""\nLast step is to upload the files to s3"""       )
						print(f"""cd {data_root}"""       )
						print(f"""transformers-cli upload {model_dir}"""       )


if __name__ == "__main__":
		A		: str								=     argparse.ArgumentParser()
		# Required parameters
		parser.add_argument(
		    '''--fsmt_checkpoint_path''',
		    default=None,
		    type=str,
		    required=True,
		    help=(
		        '''Path to the official PyTorch checkpoint file which is expected to reside in the dump dir with dicts,'''
		        ''' bpecodes, etc.'''
		    ),
		)
		parser.add_argument(
		    '''--pytorch_dump_folder_path''', default=None, type=str, required=True, help='''Path to the output PyTorch model.'''
		)
		A		: List[str]								=     parser.parse_args()
		convert_fsmt_checkpoint_to_pytorch(args.fsmt_checkpoint_path, args.pytorch_dump_folder_path)

from ...utils import (
    OptionalDependencyNotAvailable,
    is_torch_available,
    is_transformers_available,
    is_transformers_version,
)


try:
		if not (is_transformers_available() and is_torch_available()):
				raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
		from ...utils.dummy_torch_and_transformers_objects import ShapEPipeline
else:
		from .camera import create_pan_cameras
		from .pipeline_shap_e import ShapEPipeline
		from .pipeline_shap_e_img2img import ShapEImgaImgPipeline
		from .renderer import (
		    BoundingBoxVolume,
		    ImportanceRaySampler,
		    MLPNeRFModelOutput,
		    MLPNeRSTFModel,
		    ShapEParamsProjModel,
		    ShapERenderer,
		    StratifiedRaySampler,
		    VoidNeRFModel,
		)