



# DISCLAIMER: This file is strongly influenced by https://github.com/yang-song/score_sde_pytorch

from dataclasses import dataclass
from typing import Optional, Tuple, Union

import flax
import jax.numpy as jnp
from jax import random

from ..configuration_utils import ConfigMixin, register_to_config
from .scheduling_utils_flax import FlaxSchedulerMixin, FlaxSchedulerOutput, broadcast_to_shape_from_left




@flax.struct.dataclass
class 			_lowercase							:





	"""simple docstring"""
	__A					=							None
	__A					=							None
	__A					=							None




	@classmethod
	def   UpperCamelCase_ (cls	):
						"""simple docstring"""

						return cls()




@dataclass
class 			_lowercase							(     lowerCamelCase__			):





	"""simple docstring"""
	__A					=							42
	__A					=							42
	__A					=							None




class 			_lowercase							(     lowerCamelCase__,   lowerCamelCase__			):





	"""simple docstring"""




	@property
	def   UpperCamelCase_ (self	):
						"""simple docstring"""

						return True




	@register_to_config
	def __init__(self	, lowerCamelCase_ = 2000	, lowerCamelCase_ = 0.15	, lowerCamelCase_ = 0.01	, lowerCamelCase_ = 1348.0	, lowerCamelCase_ = 1E-5	, lowerCamelCase_ = 1	, ):
						"""simple docstring"""

						pass




	def   UpperCamelCase_ (self	):
						"""simple docstring"""

						a        =     ScoreSdeVeSchedulerState.create()
						return self.set_sigmas(
						    lowercase_	, self.config.num_train_timesteps	, self.config.sigma_min	, self.config.sigma_max	, self.config.sampling_eps	, )




	def   UpperCamelCase_ (self	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_ = ()	, lowerCamelCase_ = None	):
						"""simple docstring"""

						a        =     sampling_eps if sampling_eps is not None else self.config.sampling_eps

						a        =     jnp.linspace(1	, lowercase_	, lowercase_	)
						return state.replace(timesteps=lowercase_	)




	def   UpperCamelCase_ (self	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_ = None	, lowerCamelCase_ = None	, lowerCamelCase_ = None	, ):
						"""simple docstring"""

						a        =     sigma_min if sigma_min is not None else self.config.sigma_min
						a        =     sigma_max if sigma_max is not None else self.config.sigma_max
						a        =     sampling_eps if sampling_eps is not None else self.config.sampling_eps
						if state.timesteps is None:
											a        =     self.set_timesteps(lowercase_	, lowercase_	, lowercase_	)

						a        =     jnp.exp(jnp.linspace(jnp.log(lowercase_	)	, jnp.log(lowercase_	)	, lowercase_	)	)
						a        =     jnp.array([sigma_min * (sigma_max / sigma_min) ** t for t in state.timesteps]	)

						return state.replace(discrete_sigmas=lowercase_	, sigmas=lowercase_	)




	def   UpperCamelCase_ (self	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	):
						"""simple docstring"""

						return jnp.where(timesteps == 0	, jnp.zeros_like(lowercase_	)	, state.discrete_sigmas[timesteps - 1]	)




	def   UpperCamelCase_ (self	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_ = True	, ):
						"""simple docstring"""

						if state.timesteps is None:
											raise ValueError(
											    "`state.timesteps` is not set, you need to run \'set_timesteps\' after creating the scheduler"	)

						a        =     timestep * jnp.ones(
						    sample.shape[0]	, )
						a        =     (timestep * (len(state.timesteps	) - 1)).long()

						a        =     state.discrete_sigmas[timesteps]
						a        =     self.get_adjacent_sigma(lowercase_	, lowercase_	, lowercase_	)
						a        =     jnp.zeros_like(lowercase_	)
						a        =     (sigma**2 - adjacent_sigma**2) ** 0.5

						# equation 6 in the paper: the model_output modeled by the network is grad_x log pt(x)
						# also equation 47 shows the analog from SDE models to ancestral sampling methods
						a        =     diffusion.flatten()
						a        =     broadcast_to_shape_from_left(lowercase_	, sample.shape	)
						a        =     drift - diffusion**2 * model_output

						#  equation 6: sample noise for the diffusion term of
						a        =     random.split(lowercase_	, num=1	)
						a        =     random.normal(key=lowercase_	, shape=sample.shape	)
						a        =     sample - drift  # subtract because `dt` is a small negative timestep
						# TODO is the variable diffusion the correct scaling term for the noise?
						a        =     prev_sample_mean + diffusion * noise  # add impact of diffusion field g

						if not return_dict:
											return (prev_sample, prev_sample_mean, state)

						return FlaxSdeVeOutput(prev_sample=lowercase_	, prev_sample_mean=lowercase_	, state=lowercase_	)




	def   UpperCamelCase_ (self	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_	, lowerCamelCase_ = True	, ):
						"""simple docstring"""

						if state.timesteps is None:
											raise ValueError(
											    "`state.timesteps` is not set, you need to run \'set_timesteps\' after creating the scheduler"	)

						# For small batch sizes, the paper "suggest replacing norm(z) with sqrt(d), where d is the dim. of z"
						# sample noise for correction
						a        =     random.split(lowercase_	, num=1	)
						a        =     random.normal(key=lowercase_	, shape=sample.shape	)

						# compute step size from the model_output, the noise, and the snr
						a        =     jnp.linalg.norm(lowercase_	)
						a        =     jnp.linalg.norm(lowercase_	)
						a        =     (self.config.snr * noise_norm / grad_norm) ** 2 * 2
						a        =     step_size * jnp.ones(sample.shape[0]	)

						# compute corrected sample: model_output term and noise term
						a        =     step_size.flatten()
						a        =     broadcast_to_shape_from_left(lowercase_	, sample.shape	)
						a        =     sample + step_size * model_output
						a        =     prev_sample_mean + ((step_size * 2) ** 0.5) * noise

						if not return_dict:
											return (prev_sample, state)

						return FlaxSdeVeOutput(prev_sample=lowercase_	, state=lowercase_	)




	def __len__(self	):
						"""simple docstring"""

						return self.config.num_train_timesteps





import unittest

from transformers import is_torch_available
from transformers.testing_utils import require_torch, slow, torch_device


if is_torch_available():
				import torch

				from transformers import XLMProphetNetForConditionalGeneration, XLMProphetNetTokenizer



@require_torch
class 			_lowercase							(     unittest.TestCase			):





	"""simple docstring"""




	@slow
	def   UpperCamelCase_ (self	):
						"""simple docstring"""

						a        =     XLMProphetNetForConditionalGeneration.from_pretrained("microsoft/xprophetnet-large-wiki100-cased"	)
						model.to(lowerCamelCase_	)

						# encoder-decoder outputs
						a        =     torch.tensor([[17, 96208, 103471, 2]]	).to(lowerCamelCase_	)
						a        =     torch.tensor(
						    [[2, 250, 9953, 34, 69489, 1620, 32, 118424, 624, 210, 105, 2913, 1032, 351]]	).to(lowerCamelCase_	)
						a        =     model(
						    input_ids=lowerCamelCase_	, attention_mask=lowerCamelCase_	, encoder_outputs=lowerCamelCase_	, decoder_input_ids=lowerCamelCase_	)
						a        =     output[0]
						a        =     torch.Size((1, 14, 250012)	)
						self.assertEqual(output_predited_logis.shape	, lowerCamelCase_	)
						a        =     torch.tensor(
						    [[[-6.3986, -8.2391, 12.5189], [-6.3289, -8.0864, 12.6211], [-6.2418, -8.0445, 12.7968]]]	).to(lowerCamelCase_	)
						self.assertTrue(torch.allclose(output_predited_logis[:, :3, :3]	, lowerCamelCase_	, atol=1E-4	)	)

						# encoder outputs
						a        =     model.prophetnet.encoder(lowerCamelCase_	)[0]
						a        =     torch.tensor(
						    [[[-1.4260, -0.7628, 0.8453], [-1.4719, -0.1391, 0.7807], [-1.7678, 0.0114, 0.4646]]]	).to(lowerCamelCase_	)
						a        =     torch.Size((1, 4, 1024)	)
						self.assertEqual(encoder_outputs.shape	, lowerCamelCase_	)
						self.assertTrue(torch.allclose(encoder_outputs[:, :3, :3]	, lowerCamelCase_	, atol=1E-4	)	)

						# decoder outputs
						a        =     model.prophetnet.decoder(
						    lowerCamelCase_	, encoder_hidden_states=lowerCamelCase_	, )
						a        =     decoder_outputs[1].view(1	, model.config.ngram	, 14	, -1	)
						a        =     model.lm_head(lowerCamelCase_	)
						a        =     predicting_streams_logits[:, 0]
						self.assertTrue(torch.allclose(next_first_stream_logits[:, :3, :3]	, lowerCamelCase_	, atol=1E-4	)	)




	@slow
	def   UpperCamelCase_ (self	):
						"""simple docstring"""

						a        =     XLMProphetNetForConditionalGeneration.from_pretrained(
						    "microsoft/xprophetnet-large-wiki100-cased-xglue-ntg"	)
						model.to(lowerCamelCase_	)

						a        =     torch.tensor([[17, 96208, 103471, 2]]	).to(lowerCamelCase_	)
						a        =     torch.tensor(
						    [[2, 250, 9953, 34, 69489, 1620, 32, 118424, 624, 210, 105, 2913, 1032, 351]]	).to(lowerCamelCase_	)
						a        =     model(
						    input_ids=lowerCamelCase_	, attention_mask=lowerCamelCase_	, encoder_outputs=lowerCamelCase_	, decoder_input_ids=lowerCamelCase_	)
						a        =     output[0]
						a        =     torch.Size((1, 14, 250012)	)
						self.assertEqual(output_predited_logis.shape	, lowerCamelCase_	)
						# compare the actual values for a slice.
						a        =     torch.tensor(
						    [[[-9.2253, -9.7173, -6.3529], [-7.6701, -9.0145, -1.9382], [-8.0195, -7.0004, -0.1523]]]	).to(lowerCamelCase_	)

						self.assertTrue(torch.allclose(output_predited_logis[:, :3, :3]	, lowerCamelCase_	, atol=1E-4	)	)




	@slow
	def   UpperCamelCase_ (self	):
						"""simple docstring"""

						a        =     XLMProphetNetForConditionalGeneration.from_pretrained(
						    "microsoft/xprophetnet-large-wiki100-cased-xglue-ntg"	)
						model.to(lowerCamelCase_	)
						a        =     512

						a        =     XLMProphetNetTokenizer.from_pretrained("microsoft/xprophetnet-large-wiki100-cased-xglue-ntg"	)

						a        =     (
						    "Microsoft Corporation intends to officially end free support for the Windows 7 operating system after"
						    " January 14, 2020, according to the official portal of the organization. From that day, users of this"
						    " system will not be able to receive security updates, which could make their computers vulnerable to"
						    " cyber attacks."
						)
						a        =     (
						    "орпорация Microsoft намерена официально прекратить бесплатную поддержку операционной системы Windows 7"
						    " после 14 января 2020 года, сообщается на официальном портале организации . С указанного дня пользователи"
						    " этой системы не смогут получать обновления безопасности, из-за чего их компьютеры могут стать уязвимыми"
						    " к кибератакам."
						)
						a        =     (
						    "根据该组织的官方门户网站，微软公司打算在2020年1月14日之后正式终止对Windows 7操作系统的免费支持。从那时起，该系统的用户将无法接收安全更新，这可能会使他们的计算机容易受到网络攻击。"
						)

						a        =     tokenizer(
						    [EN_SENTENCE, RU_SENTENCE, ZH_SENTENCE]	, padding=lowerCamelCase_	, max_length=255	, return_tensors="pt"	).input_ids
						a        =     input_ids.to(lowerCamelCase_	)

						a        =     model.generate(
						    lowerCamelCase_	, num_beams=10	, length_penalty=1.0	, no_repeat_ngram_size=3	, early_stopping=lowerCamelCase_	)
						a        =     [tokenizer.decode(lowerCamelCase_	, skip_special_tokens=lowerCamelCase_	) for g in summary_ids]
						a        =     "Microsoft to end Windows 7 free support after January 14, 2020"
						a        =     "Microsoft намерена прекратить бесплатную поддержку Windows 7 после 14 января 2020 года"
						a        =     "微软打算终止对Windows 7操作系统的免费支持"
						self.assertListEqual(
						    [EXPECTED_TITLE_EN, EXPECTED_TITLE_RU, EXPECTED_TITLE_ZH]	, lowerCamelCase_	, )

						a        =     model.generate(
						    lowerCamelCase_	, num_beams=1	, length_penalty=1.0	, no_repeat_ngram_size=3	, early_stopping=lowerCamelCase_	)
						a        =     [
						    tokenizer.convert_ids_to_tokens(lowerCamelCase_	, skip_special_tokens=lowerCamelCase_	) for g in summary_ids_beama
						]
						a        =     "▁Microsoft ▁to ▁end ▁free ▁support ▁for ▁Windows ▁7".split(" "	)
						a        =     "▁Microsoft ▁намерен а ▁прекрати ть ▁бес плат ную ▁поддержку ▁Windows ▁7 ▁после ▁14 ▁января ▁2020 ▁года".split(
						    " "	)
						a        =     "微软 公司 打算 终止 对 Windows ▁7 操作 系统的 免费 支持".split(" "	)
						self.assertListEqual(
						    [EXPECTED_TITLE_EN_BEAM1_TOK, EXPECTED_TITLE_RU_BEAM1_TOK, EXPECTED_TITLE_ZH_BEAM1_TOK]	, lowerCamelCase_	, )
