
from pickle import UnpicklingError

import jax
import jax.numpy as jnp
import numpy as np
from flax.serialization import from_bytes
from flax.traverse_util import flatten_dict

from ..utils import logging


__A							=logging.get_logger(__name__)





def      lowerCamelCase_					(							lowerCamelCase__      ,					lowerCamelCase__       ):
				try:
								with open(lowerCamelCase__      ,					"rb"       ) as flax_state_f:
												lowerCamelCase_         =     from_bytes(lowerCamelCase__      ,					flax_state_f.read()       )
				except UnpicklingError as e:
								try:
												with open(lowerCamelCase__       ) as f:
																if f.read().startswith("version"       ):
																				raise OSError(
																				    "You seem to have cloned a repository without having git-lfs installed. Please"
																				    " install git-lfs and run `git lfs install` followed by `git lfs pull` in the"
																				    " folder you cloned."       )
																else:
																				raise ValueError from e
								except (UnicodeDecodeError, ValueError):
												raise EnvironmentError(F'Unable to convert {model_file} to Flax deserializable object. '       )

				return load_flax_weights_in_pytorch_model(lowerCamelCase__      ,					lowerCamelCase__       )





def      lowerCamelCase_					(							lowerCamelCase__      ,					lowerCamelCase__       ):

				try:
								import torch  # noqa: F401
				except ImportError:
								logger.error(
								    "Loading Flax weights in PyTorch requires both PyTorch and Flax to be installed. Please see"
								    " https://pytorch.org/ and https://flax.readthedocs.io/en/latest/installation.html for installation"
								    " instructions."       )
								raise

				# check if we have bf16 weights
				lowerCamelCase_         =     flatten_dict(jax.tree_util.tree_map(lambda lowerCamelCase__       : x.dtype == jnp.bfloataa      ,					lowerCamelCase__       )       ).values()
				if any(lowerCamelCase__       ):
								# convert all weights to fp32 if they are bf16 since torch.from_numpy can-not handle bf16

								# and bf16 is not fully supported in PT yet.
								logger.warning(
								    "Found ``bfloat16`` weights in Flax model. Casting all ``bfloat16`` weights to ``float32`` "
								    "before loading those in PyTorch model."       )
								lowerCamelCase_         =     jax.tree_util.tree_map(
								    lambda lowerCamelCase__       : params.astype(np.floataa       ) if params.dtype == jnp.bfloataa else params      ,					lowerCamelCase__       )

				lowerCamelCase_         =     ""

				lowerCamelCase_         =     flatten_dict(lowerCamelCase__      ,					sep="."       )
				lowerCamelCase_         =     pt_model.state_dict()

				# keep track of unexpected & missing keys
				lowerCamelCase_         =     []
				lowerCamelCase_         =     set(pt_model_dict.keys()       )

				for flax_key_tuple, flax_tensor in flax_state_dict.items():
								lowerCamelCase_         =     flax_key_tuple.split("."       )

								if flax_key_tuple_array[-1] == "kernel" and flax_tensor.ndim == 4:
												lowerCamelCase_         =     flax_key_tuple_array[:-1] + ["weight"]
												lowerCamelCase_         =     jnp.transpose(lowerCamelCase__      ,					(3, 2, 0, 1)       )
								elif flax_key_tuple_array[-1] == "kernel":
												lowerCamelCase_         =     flax_key_tuple_array[:-1] + ["weight"]
												lowerCamelCase_         =     flax_tensor.T
								elif flax_key_tuple_array[-1] == "scale":
												lowerCamelCase_         =     flax_key_tuple_array[:-1] + ["weight"]

								if "time_embedding" not in flax_key_tuple_array:
												for i, flax_key_tuple_string in enumerate(lowerCamelCase__       ):
																lowerCamelCase_         =     (
																    flax_key_tuple_string.replace("_0"      ,					".0"       )
																    .replace("_1"      ,					".1"       )
																    .replace("_2"      ,					".2"       )
																    .replace("_3"      ,					".3"       )
																    .replace("_4"      ,					".4"       )
																    .replace("_5"      ,					".5"       )
																    .replace("_6"      ,					".6"       )
																    .replace("_7"      ,					".7"       )
																    .replace("_8"      ,					".8"       )
																    .replace("_9"      ,					".9"       )
																)

								lowerCamelCase_         =     ".".join(lowerCamelCase__       )

								if flax_key in pt_model_dict:
												if flax_tensor.shape != pt_model_dict[flax_key].shape:
																raise ValueError(
																    F'Flax checkpoint seems to be incorrect. Weight {flax_key_tuple} was expected '
																    F'to be of shape {pt_model_dict[flax_key].shape}, but is {flax_tensor.shape}.'       )
												else:
																# add weight to pytorch dict
																lowerCamelCase_         =     np.asarray(lowerCamelCase__       ) if not isinstance(lowerCamelCase__      ,					np.ndarray       ) else flax_tensor
																lowerCamelCase_         =     torch.from_numpy(lowerCamelCase__       )
																# remove from missing keys
																missing_keys.remove(lowerCamelCase__       )
								else:
												# weight is not expected by PyTorch model
												unexpected_keys.append(lowerCamelCase__       )

				pt_model.load_state_dict(lowerCamelCase__       )

				# re-transform missing_keys to list
				lowerCamelCase_         =     list(lowerCamelCase__       )

				if len(lowerCamelCase__       ) > 0:
								logger.warning(
								    "Some weights of the Flax model were not used when initializing the PyTorch model"
								    F' {pt_model.__class__.__name__}: {unexpected_keys}\n- This IS expected if you are initializing'
								    F' {pt_model.__class__.__name__} from a Flax model trained on another task or with another architecture'
								    " (e.g. initializing a BertForSequenceClassification model from a FlaxBertForPreTraining model).\n- This"
								    F' IS NOT expected if you are initializing {pt_model.__class__.__name__} from a Flax model that you expect'
								    " to be exactly identical (e.g. initializing a BertForSequenceClassification model from a"
								    " FlaxBertForSequenceClassification model)."       )
				if len(lowerCamelCase__       ) > 0:
								logger.warning(
								    F'Some weights of {pt_model.__class__.__name__} were not initialized from the Flax model and are newly'
								    F' initialized: {missing_keys}\nYou should probably TRAIN this model on a down-stream task to be able to'
								    " use it for predictions and inference."       )

				return pt_model




import sacrebleu as scb
from packaging import version
from sacrebleu import TER

import datasets


__A							='''\
@inproceedings{snover-etal-2006-study,
    title = "A Study of Translation Edit Rate with Targeted Human Annotation",
    author = "Snover, Matthew  and
      Dorr, Bonnie  and
      Schwartz, Rich  and
      Micciulla, Linnea  and
      Makhoul, John",
    booktitle = "Proceedings of the 7th Conference of the Association for Machine Translation in the Americas: Technical Papers",
    month = aug # " 8-12",
    year = "2006",
    address = "Cambridge, Massachusetts, USA",
    publisher = "Association for Machine Translation in the Americas",
    url = "https://aclanthology.org/2006.amta-papers.25",
    pages = "223--231",
}
@inproceedings{post-2018-call,
    title = "A Call for Clarity in Reporting {BLEU} Scores",
    author = "Post, Matt",
    booktitle = "Proceedings of the Third Conference on Machine Translation: Research Papers",
    month = oct,
    year = "2018",
    address = "Belgium, Brussels",
    publisher = "Association for Computational Linguistics",
    url = "https://www.aclweb.org/anthology/W18-6319",
    pages = "186--191",
}
'''

__A							='''\
TER (Translation Edit Rate, also called Translation Error Rate) is a metric to quantify the edit operations that a
hypothesis requires to match a reference translation. We use the implementation that is already present in sacrebleu
(https://github.com/mjpost/sacreBLEU#ter), which in turn is inspired by the TERCOM implementation, which can be found
here: https://github.com/jhclark/tercom.

The implementation here is slightly different from sacrebleu in terms of the required input format. The length of
the references and hypotheses lists need to be the same, so you may need to transpose your references compared to
sacrebleu\'s required input format. See https://github.com/huggingface/datasets/issues/3154#issuecomment-950746534

See the README.md file at https://github.com/mjpost/sacreBLEU#ter for more information.
'''

__A							='''
Produces TER scores alongside the number of edits and reference length.

Args:
    predictions (list of str): The system stream (a sequence of segments).
    references (list of list of str): A list of one or more reference streams (each a sequence of segments).
    normalized (boolean): If `True`, applies basic tokenization and normalization to sentences. Defaults to `False`.
    ignore_punct (boolean): If `True`, applies basic tokenization and normalization to sentences. Defaults to `False`.
    support_zh_ja_chars (boolean): If `True`, tokenization/normalization supports processing of Chinese characters,
                                    as well as Japanese Kanji, Hiragana, Katakana, and Phonetic Extensions of Katakana.
                                    Only applies if `normalized = True`. Defaults to `False`.
    case_sensitive (boolean): If `False`, makes all predictions and references lowercase to ignore differences in case. Defaults to `False`.

Returns:
    \'score\' (float): TER score (num_edits / sum_ref_lengths * 100)
    \'num_edits\' (int): The cumulative number of edits
    \'ref_length\' (float): The cumulative average reference length

Examples:
    Example 1:
        >>> predictions = ["does this sentence match??",
        ...                     "what about this sentence?",
        ...                     "What did the TER metric user say to the developer?"]
        >>> references = [["does this sentence match", "does this sentence match!?!"],
        ...             ["wHaT aBoUt ThIs SeNtEnCe?", "wHaT aBoUt ThIs SeNtEnCe?"],
        ...             ["Your jokes are...", "...TERrible"]]
        >>> ter = datasets.load_metric("ter")
        >>> results = ter.compute(predictions=predictions,
        ...                         references=references,
        ...                         case_sensitive=True)
        >>> print(results)
        {\'score\': 150.0, \'num_edits\': 15, \'ref_length\': 10.0}

    Example 2:
        >>> predictions = ["does this sentence match??",
        ...                     "what about this sentence?"]
        >>> references = [["does this sentence match", "does this sentence match!?!"],
        ...             ["wHaT aBoUt ThIs SeNtEnCe?", "wHaT aBoUt ThIs SeNtEnCe?"]]
        >>> ter = datasets.load_metric("ter")
        >>> results = ter.compute(predictions=predictions,
        ...                         references=references,
        ...                         case_sensitive=True)
        >>> print(results)
        {\'score\': 62.5, \'num_edits\': 5, \'ref_length\': 8.0}

    Example 3:
        >>> predictions = ["does this sentence match??",
        ...                     "what about this sentence?"]
        >>> references = [["does this sentence match", "does this sentence match!?!"],
        ...             ["wHaT aBoUt ThIs SeNtEnCe?", "wHaT aBoUt ThIs SeNtEnCe?"]]
        >>> ter = datasets.load_metric("ter")
        >>> results = ter.compute(predictions=predictions,
        ...                         references=references,
        ...                         normalized=True,
        ...                         case_sensitive=True)
        >>> print(results)
        {\'score\': 57.14285714285714, \'num_edits\': 6, \'ref_length\': 10.5}

    Example 4:
        >>> predictions = ["does this sentence match??",
        ...                     "what about this sentence?"]
        >>> references = [["does this sentence match", "does this sentence match!?!"],
        ...             ["wHaT aBoUt ThIs SeNtEnCe?", "wHaT aBoUt ThIs SeNtEnCe?"]]
        >>> ter = datasets.load_metric("ter")
        >>> results = ter.compute(predictions=predictions,
        ...                         references=references,
        ...                         ignore_punct=True,
        ...                         case_sensitive=False)
        >>> print(results)
        {\'score\': 0.0, \'num_edits\': 0, \'ref_length\': 8.0}

    Example 5:
        >>> predictions = ["does this sentence match??",
        ...                    "what about this sentence?",
        ...                    "What did the TER metric user say to the developer?"]
        >>> references = [["does this sentence match", "does this sentence match!?!"],
        ...             ["wHaT aBoUt ThIs SeNtEnCe?", "wHaT aBoUt ThIs SeNtEnCe?"],
        ...             ["Your jokes are...", "...TERrible"]]
        >>> ter = datasets.load_metric("ter")
        >>> results = ter.compute(predictions=predictions,
        ...                         references=references,
        ...                         ignore_punct=True,
        ...                         case_sensitive=False)
        >>> print(results)
        {\'score\': 100.0, \'num_edits\': 10, \'ref_length\': 10.0}
'''




@datasets.utils.file_utils.add_start_docstrings(_DESCRIPTION     ,			_KWARGS_DESCRIPTION		)
class        _SCREAMING_SNAKE_CASE	( datasets.Metric		):



	def        SCREAMING_SNAKE_CASE_(       self					)							->			Dict:
					if version.parse(scb.__version__					) < version.parse("1.4.12"					):
									raise ImportWarning(
									    "To use `sacrebleu`, the module `sacrebleu>=1.4.12` is required, and the current version of `sacrebleu` doesn't match this condition.\n"
									    "You can install it with `pip install \"sacrebleu>=1.4.12\"`."					)
					return datasets.MetricInfo(
					    description=_DESCRIPTION		,    citation=_CITATION		,    homepage="http://www.cs.umd.edu/~snover/tercom/"		,    inputs_description=_KWARGS_DESCRIPTION		,    features=datasets.Features(
					        {
					            "predictions": datasets.Value("string"		,    id="sequence"					),
					            "references": datasets.Sequence(datasets.Value("string"		,    id="sequence"					)		,    id="references"					),
					        }					)		,    codebase_urls=["https://github.com/mjpost/sacreBLEU#ter"]		,    reference_urls=[
					        "https://github.com/jhclark/tercom",
					    ]		,    )



	def        SCREAMING_SNAKE_CASE_(       self		,    lowercase		,    lowercase		,    lowercase = False		,    lowercase = False		,    lowercase = False		,    lowercase = False		,    )							->			Tuple:
					lowerCamelCase_         =     len(references[0]					)
					if any(len(lowercase					) != references_per_prediction for refs in references					):
									raise ValueError("Sacrebleu requires the same number of references for each prediction"					)
					lowerCamelCase_         =     [[refs[i] for refs in references] for i in range(lowercase					)]

					lowerCamelCase_         =     TER(
					    normalized=lowercase		,    no_punct=lowercase		,    asian_support=lowercase		,    case_sensitive=lowercase		,    )
					lowerCamelCase_         =     sb_ter.corpus_score(lowercase		,    lowercase					)

					return {"score": output.score, "num_edits": output.num_edits, "ref_length": output.ref_length}


