"""simple docstring"""







import json
import os
from functools import lru_cache
from typing import List, Optional, Tuple

import regex as re

from ...tokenization_utils import AddedToken, PreTrainedTokenizer
from ...utils import logging


__SCREAMING_SNAKE_CASE    	=logging.get_logger(__name__)


__SCREAMING_SNAKE_CASE    	={"vocab_file": "vocab.json", "merges_file": "merges.txt"}

__SCREAMING_SNAKE_CASE    	={
    "vocab_file": {
        "allenai/longformer-base-4096": "https://huggingface.co/allenai/longformer-base-4096/resolve/main/vocab.json",
        "allenai/longformer-large-4096": (
            "https://huggingface.co/allenai/longformer-large-4096/resolve/main/vocab.json"
        ),
        "allenai/longformer-large-4096-finetuned-triviaqa": (
            "https://huggingface.co/allenai/longformer-large-4096-finetuned-triviaqa/resolve/main/vocab.json"
        ),
        "allenai/longformer-base-4096-extra.pos.embd.only": (
            "https://huggingface.co/allenai/longformer-base-4096-extra.pos.embd.only/resolve/main/vocab.json"
        ),
        "allenai/longformer-large-4096-extra.pos.embd.only": (
            "https://huggingface.co/allenai/longformer-large-4096-extra.pos.embd.only/resolve/main/vocab.json"
        ),
    },
    "merges_file": {
        "allenai/longformer-base-4096": "https://huggingface.co/allenai/longformer-base-4096/resolve/main/merges.txt",
        "allenai/longformer-large-4096": (
            "https://huggingface.co/allenai/longformer-large-4096/resolve/main/merges.txt"
        ),
        "allenai/longformer-large-4096-finetuned-triviaqa": (
            "https://huggingface.co/allenai/longformer-large-4096-finetuned-triviaqa/resolve/main/merges.txt"
        ),
        "allenai/longformer-base-4096-extra.pos.embd.only": (
            "https://huggingface.co/allenai/longformer-base-4096-extra.pos.embd.only/resolve/main/merges.txt"
        ),
        "allenai/longformer-large-4096-extra.pos.embd.only": (
            "https://huggingface.co/allenai/longformer-large-4096-extra.pos.embd.only/resolve/main/merges.txt"
        ),
    },
}

__SCREAMING_SNAKE_CASE    	={
    "allenai/longformer-base-4096": 4096,
    "allenai/longformer-large-4096": 4096,
    "allenai/longformer-large-4096-finetuned-triviaqa": 4096,
    "allenai/longformer-base-4096-extra.pos.embd.only": 4096,
    "allenai/longformer-large-4096-extra.pos.embd.only": 4096,
}



@lru_cache()
# Copied from transformers.models.roberta.tokenization_roberta.bytes_to_unicode
def 			lowercase__(       ):
     lowercase_	:				Optional[int]													=	(
         list(range(ord('!'      )     ,			ord('~'      ) + 1      )      ) + list(range(ord('¡'      )     ,			ord('¬'      ) + 1      )      ) + list(range(ord('®'      )     ,			ord('ÿ'      ) + 1      )      )
     )
     lowercase_	:				Any													=	bs[:]
     lowercase_	:				Dict													=	0
     for b in range(2**8      ):
          if b not in bs:
               bs.append(_lowerCamelCase      )
               cs.append(2**8 + n      )
               n += 1
     lowercase_	:				Tuple													=	[chr(_lowerCamelCase      ) for n in cs]
     return dict(zip(_lowerCamelCase     ,			_lowerCamelCase      )      )



def 			lowercase__(       __SCREAMING_SNAKE_CASE							:     List[Any]      ):
     lowercase_	:				Union[str, Any]													=	set()
     lowercase_	:				Tuple													=	word[0]
     for char in word[1:]:
          pairs.add((prev_char, char)      )
          lowercase_	:				Dict													=	char
     return pairs







class        UpperCamelCase		(			UpperCamelCase__  ):
   lowercase							=  VOCAB_FILES_NAMES
   lowercase							=  PRETRAINED_VOCAB_FILES_MAP
   lowercase							=  PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
   lowercase							=  ['input_ids', 'attention_mask']
   def __init__(			self     ,__UpperCamelCase     ,__UpperCamelCase     ,__UpperCamelCase="replace"     ,__UpperCamelCase="<s>"     ,__UpperCamelCase="</s>"     ,__UpperCamelCase="</s>"     ,__UpperCamelCase="<s>"     ,__UpperCamelCase="<unk>"     ,__UpperCamelCase="<pad>"     ,__UpperCamelCase="<mask>"     ,__UpperCamelCase=False     ,**__UpperCamelCase     ,)	->      Optional[int]:


        '''simple docstring'''


        lowercase_	:				Optional[int]													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else bos_token
        lowercase_	:				int													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else eos_token
        lowercase_	:				Tuple													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else sep_token
        lowercase_	:				Optional[int]													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else cls_token
        lowercase_	:				List[Any]													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else unk_token
        lowercase_	:				str													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else pad_token

        # Mask token behave like a normal word, i.e. include the space before it
        lowercase_	:				Optional[Any]													=	AddedToken(lowercase_     ,lstrip=lowercase_     ,rstrip=lowercase_			) if isinstance(lowercase_     ,lowercase_			) else mask_token

        super().__init__(
            errors=lowercase_     ,bos_token=lowercase_     ,eos_token=lowercase_     ,unk_token=lowercase_     ,sep_token=lowercase_     ,cls_token=lowercase_     ,pad_token=lowercase_     ,mask_token=lowercase_     ,add_prefix_space=lowercase_     ,**lowercase_     ,)

        with open(lowercase_     ,encoding='utf-8'			) as vocab_handle:
             lowercase_	:				str													=	json.load(lowercase_			)
        lowercase_	:				Union[str, Any]													=	{v: k for k, v in self.encoder.items()}
        lowercase_	:				Optional[int]													=	errors  # how to handle errors in decoding
        lowercase_	:				Optional[int]													=	bytes_to_unicode()
        lowercase_	:				str													=	{v: k for k, v in self.byte_encoder.items()}
        with open(lowercase_     ,encoding='utf-8'			) as merges_handle:
             lowercase_	:				Dict													=	merges_handle.read().split('\n'			)[1:-1]
        lowercase_	:				Union[str, Any]													=	[tuple(merge.split()			) for merge in bpe_merges]
        lowercase_	:				str													=	dict(zip(lowercase_     ,range(len(lowercase_			)			)			)			)
        lowercase_	:				Union[str, Any]													=	{}
        lowercase_	:				List[str]													=	add_prefix_space

        # Should have added re.IGNORECASE so BPE merges can happen for capitalized versions of contractions
        lowercase_	:				List[str]													=	re.compile(r'\'s|\'t|\'re|\'ve|\'m|\'ll|\'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+'			)
   @property
   def 			_UpperCAmelCase   (			self			)	->      str:


        '''simple docstring'''


        return len(self.encoder			)
   def 			_UpperCAmelCase   (			self			)	->      Tuple:


        '''simple docstring'''


        return dict(self.encoder     ,**self.added_tokens_encoder			)
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase			)	->      Optional[Any]:


        '''simple docstring'''


        if token in self.cache:
             return self.cache[token]
        lowercase_	:				str													=	tuple(lowercase_			)
        lowercase_	:				int													=	get_pairs(lowercase_			)

        if not pairs:
             return token

        while True:
             lowercase_	:				str													=	min(lowercase_     ,key=lambda __UpperCamelCase			: self.bpe_ranks.get(lowercase_     ,float('inf'			)			)			)
             if bigram not in self.bpe_ranks:
                  break
             lowercase_							,  lowercase_	:				Optional[Any]													=	bigram
             lowercase_	:				Optional[int]													=	[]
             lowercase_	:				Optional[int]													=	0
             while i < len(lowercase_			):
                  try:
                       lowercase_	:				List[Any]													=	word.index(lowercase_     ,lowercase_			)
                  except ValueError:
                       new_word.extend(word[i:]			)
                       break
                  else:
                       new_word.extend(word[i:j]			)
                       lowercase_	:				Union[str, Any]													=	j

                  if word[i] == first and i < len(lowercase_			) - 1 and word[i + 1] == second:
                       new_word.append(first + second			)
                       i += 2
                  else:
                       new_word.append(word[i]			)
                       i += 1
             lowercase_	:				Dict													=	tuple(lowercase_			)
             lowercase_	:				int													=	new_word
             if len(lowercase_			) == 1:
                  break
             else:
                  lowercase_	:				Union[str, Any]													=	get_pairs(lowercase_			)
        lowercase_	:				str													=	' '.join(lowercase_			)
        lowercase_	:				List[Any]													=	word
        return word
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase			)	->      str:


        '''simple docstring'''


        lowercase_	:				str													=	[]
        for token in re.findall(self.pat     ,lowercase_			):
             lowercase_	:				List[Any]													=	''.join(
                 self.byte_encoder[b] for b in token.encode('utf-8'			)			)  # Maps all our bytes to unicode strings, avoiding control tokens of the BPE (spaces in our case)
             bpe_tokens.extend(bpe_token for bpe_token in self.bpe(lowercase_			).split(' '			)			)
        return bpe_tokens
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase			)	->      Optional[Any]:


        '''simple docstring'''


        return self.encoder.get(lowercase_     ,self.encoder.get(self.unk_token			)			)
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase			)	->      Optional[Any]:


        '''simple docstring'''


        return self.decoder.get(lowercase_			)
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase			)	->      Tuple:


        '''simple docstring'''


        lowercase_	:				str													=	''.join(lowercase_			)
        lowercase_	:				List[str]													=	bytearray([self.byte_decoder[c] for c in text]			).decode('utf-8'     ,errors=self.errors			)
        return text
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase     ,__UpperCamelCase = None			)	->      Tuple[str]:


        '''simple docstring'''


        if not os.path.isdir(lowercase_			):
             logger.error(f'''Vocabulary path ({save_directory}) should be a directory'''			)
             return
        lowercase_	:				Dict													=	os.path.join(
            lowercase_     ,(filename_prefix + '-' if filename_prefix else '') + VOCAB_FILES_NAMES['vocab_file']			)
        lowercase_	:				Optional[Any]													=	os.path.join(
            lowercase_     ,(filename_prefix + '-' if filename_prefix else '') + VOCAB_FILES_NAMES['merges_file']			)

        with open(lowercase_     ,'w'     ,encoding='utf-8'			) as f:
             f.write(json.dumps(self.encoder     ,indent=2     ,sort_keys=lowercase_     ,ensure_ascii=lowercase_			) + '\n'			)

        lowercase_	:				int													=	0
        with open(lowercase_     ,'w'     ,encoding='utf-8'			) as writer:
             writer.write('#version: 0.2\n'			)
             for bpe_tokens, token_index in sorted(self.bpe_ranks.items()     ,key=lambda __UpperCamelCase			: kv[1]			):
                  if index != token_index:
                       logger.warning(
                           f'''Saving vocabulary to {merge_file}: BPE merge indices are not consecutive.'''
                           ' Please check that the tokenizer is not corrupted!'			)
                       lowercase_	:				Any													=	token_index
                  writer.write(' '.join(lowercase_			) + '\n'			)
                  index += 1

        return vocab_file, merge_file
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase     ,__UpperCamelCase = None			)	->      List[int]:


        '''simple docstring'''


        if token_ids_a is None:
             return [self.cls_token_id] + token_ids_a + [self.sep_token_id]
        lowercase_	:				Optional[Any]													=	[self.cls_token_id]
        lowercase_	:				Tuple													=	[self.sep_token_id]
        return cls + token_ids_a + sep + sep + token_ids_a + sep
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase     ,__UpperCamelCase = None     ,__UpperCamelCase = False			)	->      List[int]:


        '''simple docstring'''


        if already_has_special_tokens:
             return super().get_special_tokens_mask(
                 token_ids_a=lowercase_     ,token_ids_a=lowercase_     ,already_has_special_tokens=lowercase_			)

        if token_ids_a is None:
             return [1] + ([0] * len(lowercase_			)) + [1]
        return [1] + ([0] * len(lowercase_			)) + [1, 1] + ([0] * len(lowercase_			)) + [1]
   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase     ,__UpperCamelCase = None			)	->      List[int]:


        '''simple docstring'''


        lowercase_	:				List[Any]													=	[self.sep_token_id]
        lowercase_	:				List[str]													=	[self.cls_token_id]

        if token_ids_a is None:
             return len(cls + token_ids_a + sep			) * [0]
        return len(cls + token_ids_a + sep + sep + token_ids_a + sep			) * [0]







   def 			_UpperCAmelCase   (			self     ,__UpperCamelCase     ,__UpperCamelCase=False     ,**__UpperCamelCase			)	->      Dict:


        '''simple docstring'''


        lowercase_	:				List[str]													=	kwargs.pop('add_prefix_space'     ,self.add_prefix_space			)
        if (is_split_into_words or add_prefix_space) and (len(lowercase_			) > 0 and not text[0].isspace()):
             lowercase_	:				Optional[int]													=	' ' + text
        return (text, kwargs)








'''simple docstring'''

import functools





def 						UpperCamelCase				(							_lowerCamelCase					:					str						,       _lowerCamelCase					:					str       ):
    A__				=			len(_lowerCamelCase       )
    A__				=			len(_lowerCamelCase       )

    @functools.cache
    def min_distance(_lowerCamelCase					:					int						,       _lowerCamelCase					:					int       ) -> int:
        # if first word index is overflow - delete all from the second word
        if indexa >= len_worda:
            return len_worda - indexa
        # if second word index is overflow - delete all from the first word
        if indexa >= len_worda:
            return len_worda - indexa
        A__				=			int(worda[indexa] != worda[indexa]       )  # current letters not identical
        return min(
            1 + min_distance(indexa + 1						,       _lowerCamelCase       )						,       1 + min_distance(_lowerCamelCase						,       indexa + 1       )						,       diff + min_distance(indexa + 1						,       indexa + 1       )						,       )

    return min_distance(0						,       0       )


if __name__ == "__main__":
  import doctest

  doctest.testmod()



