

from queue import PriorityQueue
from typing import Any

import numpy as np


def     __SCREAMING_SNAKE_CASE   (SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						):
						for nxt, d in graph[v]:
												if nxt in visited_forward:
																		continue
												snake_case_  =      cst_fwd.get(SCREAMING_SNAKE_CASE__    ,						np.inf			)
												snake_case_  =      cst_fwd[v] + d
												if new_cost_f < old_cost_f:
																		queue.put((new_cost_f, nxt)			)
																		snake_case_  =      new_cost_f
																		snake_case_  =      v
												if nxt in visited_backward:
																		if cst_fwd[v] + d + cst_bwd[nxt] < shortest_distance:
																								snake_case_  =      cst_fwd[v] + d + cst_bwd[nxt]
						return shortest_distance


def     __SCREAMING_SNAKE_CASE   (SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__			):
						snake_case_  =      -1

						snake_case_  =      set()
						snake_case_  =      set()
						snake_case_  =      {source: 0}
						snake_case_  =      {destination: 0}
						snake_case_  =      {source: None}
						snake_case_  =      {destination: None}
						snake_case_  =      PriorityQueue()
						snake_case_  =      PriorityQueue()

						snake_case_  =      np.inf

						queue_forward.put((0, source)			)
						queue_backward.put((0, destination)			)

						if source == destination:
												return 0

						while not queue_forward.empty() and not queue_backward.empty():
												snake_case_,       snake_case_  =      queue_forward.get()
												visited_forward.add(SCREAMING_SNAKE_CASE__			)

												snake_case_,       snake_case_  =      queue_backward.get()
												visited_backward.add(SCREAMING_SNAKE_CASE__			)

												snake_case_  =      pass_and_relaxation(
												    SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						)

												snake_case_  =      pass_and_relaxation(
												    SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						SCREAMING_SNAKE_CASE__    ,						)

												if cst_fwd[v_fwd] + cst_bwd[v_bwd] >= shortest_distance:
																		break

						if shortest_distance != np.inf:
												snake_case_  =      shortest_distance
						return shortest_path_distance


lowerCAmelCase_			      =      {
    '''B''': [['''C''', 1]],
    '''C''': [['''D''', 1]],
    '''D''': [['''F''', 1]],
    '''E''': [['''B''', 1], ['''G''', 2]],
    '''F''': [],
    '''G''': [['''F''', 1]],
}
lowerCAmelCase_			      =      {
    '''B''': [['''E''', 1]],
    '''C''': [['''B''', 1]],
    '''D''': [['''C''', 1]],
    '''F''': [['''D''', 1], ['''G''', 1]],
    '''E''': [[None, np.inf]],
    '''G''': [['''E''', 2]],
}

if __name__ == "__main__":
					import doctest

					doctest.testmod()






'''simple docstring'''




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

import torch
import torch.nn as nn

from ..configuration_utils import ConfigMixin, register_to_config
from ..utils import BaseOutput
from .embeddings import GaussianFourierProjection, TimestepEmbedding, Timesteps
from .modeling_utils import ModelMixin
from .unet_ad_blocks import get_down_block, get_mid_block, get_out_block, get_up_block


@dataclass
class 					SCREAMING_SNAKE_CASE       (a__				):
     lowerCAmelCase						     =			42




class 					SCREAMING_SNAKE_CASE       (a__   ,						a__				):


     @register_to_config
     def __init__(		self		,      _UpperCAmelCase = 6_5536		,      _UpperCAmelCase = None		,      _UpperCAmelCase = 2		,      _UpperCAmelCase = 2		,      _UpperCAmelCase = 0		,      _UpperCAmelCase = "fourier"		,      _UpperCAmelCase = True		,      _UpperCAmelCase = False		,      _UpperCAmelCase = 0.0		,      _UpperCAmelCase = ("DownBlock1DNoSkip", "DownBlock1D", "AttnDownBlock1D")		,      _UpperCAmelCase = ("AttnUpBlock1D", "UpBlock1D", "UpBlock1DNoSkip")		,      _UpperCAmelCase = "UNetMidBlock1D"		,      _UpperCAmelCase = None		,      _UpperCAmelCase = (32, 32, 64)		,      _UpperCAmelCase = None		,      _UpperCAmelCase = 8		,      _UpperCAmelCase = 1		,      _UpperCAmelCase = False		,      ):

          '''simple docstring'''






          super().__init__()
          __A		:					Dict						=			sample_size

          # time
          if time_embedding_type == "fourier":
               __A		:					int						=			GaussianFourierProjection(
                   embedding_size=8		,      set_W_to_weight=_UpperCAmelCase		,      log=_UpperCAmelCase		,      flip_sin_to_cos=_UpperCAmelCase)
               __A		:					Any						=			2 * block_out_channels[0]
          elif time_embedding_type == "positional":
               __A		:					List[str]						=			Timesteps(
                   block_out_channels[0]		,      flip_sin_to_cos=_UpperCAmelCase		,      downscale_freq_shift=_UpperCAmelCase)
               __A		:					List[str]						=			block_out_channels[0]

          if use_timestep_embedding:
               __A		:					Optional[Any]						=			block_out_channels[0] * 4
               __A		:					Optional[int]						=			TimestepEmbedding(
                   in_channels=_UpperCAmelCase		,      time_embed_dim=_UpperCAmelCase		,      act_fn=_UpperCAmelCase		,      out_dim=block_out_channels[0]		,      )

          __A		:					Dict						=			nn.ModuleList([])
          __A		:					Dict						=			None
          __A		:					Tuple						=			nn.ModuleList([])
          __A		:					Tuple						=			None

          # down
          __A		:					Any						=			in_channels
          for i, down_block_type in enumerate(_UpperCAmelCase):
               __A		:					Tuple						=			output_channel
               __A		:					Optional[Any]						=			block_out_channels[i]

               if i == 0:
                    input_channel += extra_in_channels

               __A		:					List[str]						=			i == len(_UpperCAmelCase) - 1

               __A		:					int						=			get_down_block(
                   _UpperCAmelCase		,      num_layers=_UpperCAmelCase		,      in_channels=_UpperCAmelCase		,      out_channels=_UpperCAmelCase		,      temb_channels=block_out_channels[0]		,      add_downsample=not is_final_block or downsample_each_block		,      )
               self.down_blocks.append(_UpperCAmelCase)

          # mid
          __A		:					str						=			get_mid_block(
              _UpperCAmelCase		,      in_channels=block_out_channels[-1]		,      mid_channels=block_out_channels[-1]		,      out_channels=block_out_channels[-1]		,      embed_dim=block_out_channels[0]		,      num_layers=_UpperCAmelCase		,      add_downsample=_UpperCAmelCase		,      )

          # up
          __A		:					Optional[int]						=			list(reversed(_UpperCAmelCase))
          __A		:					Optional[int]						=			reversed_block_out_channels[0]
          if out_block_type is None:
               __A		:					str						=			out_channels
          else:
               __A		:					List[Any]						=			block_out_channels[0]

          for i, up_block_type in enumerate(_UpperCAmelCase):
               __A		:					Optional[Any]						=			output_channel
               __A		:					Optional[Any]						=			(
                   reversed_block_out_channels[i + 1] if i < len(_UpperCAmelCase) - 1 else final_upsample_channels
               )

               __A		:					Dict						=			i == len(_UpperCAmelCase) - 1

               __A		:					str						=			get_up_block(
                   _UpperCAmelCase		,      num_layers=_UpperCAmelCase		,      in_channels=_UpperCAmelCase		,      out_channels=_UpperCAmelCase		,      temb_channels=block_out_channels[0]		,      add_upsample=not is_final_block		,      )
               self.up_blocks.append(_UpperCAmelCase)
               __A		:					Optional[int]						=			output_channel

          # out
          __A		:					str						=			norm_num_groups if norm_num_groups is not None else min(block_out_channels[0] // 4		,      32)
          __A		:					Optional[Any]						=			get_out_block(
              out_block_type=_UpperCAmelCase		,      num_groups_out=_UpperCAmelCase		,      embed_dim=block_out_channels[0]		,      out_channels=_UpperCAmelCase		,      act_fn=_UpperCAmelCase		,      fc_dim=block_out_channels[-1] // 4		,      )


     def 				SCREAMING_SNAKE_CASE    (		self		,      _UpperCAmelCase		,      _UpperCAmelCase		,      _UpperCAmelCase = True		,      ):

          '''simple docstring'''






          __A		:					Any						=			timestep
          if not torch.is_tensor(_UpperCAmelCase):
               __A		:					Any						=			torch.tensor([timesteps]		,      dtype=torch.long		,      device=sample.device)
          elif torch.is_tensor(_UpperCAmelCase) and len(timesteps.shape) == 0:
               __A		:					Any						=			timesteps[None].to(sample.device)

          __A		:					List[Any]						=			self.time_proj(_UpperCAmelCase)
          if self.config.use_timestep_embedding:
               __A		:					Dict						=			self.time_mlp(_UpperCAmelCase)
          else:
               __A		:					Dict						=			timestep_embed[..., None]
               __A		:					Tuple						=			timestep_embed.repeat([1, 1, sample.shape[2]]).to(sample.dtype)
               __A		:					List[Any]						=			timestep_embed.broadcast_to((sample.shape[:1] + timestep_embed.shape[1:]))

          # 2. down
          __A		:					int						=			()
          for downsample_block in self.down_blocks:
               __A					,__A		:					int						=			downsample_block(hidden_states=_UpperCAmelCase		,      temb=_UpperCAmelCase)
               down_block_res_samples += res_samples

          # 3. mid
          if self.mid_block:
               __A		:					Optional[int]						=			self.mid_block(_UpperCAmelCase		,      _UpperCAmelCase)

          # 4. up
          for i, upsample_block in enumerate(self.up_blocks):
               __A		:					Any						=			down_block_res_samples[-1:]
               __A		:					Optional[int]						=			down_block_res_samples[:-1]
               __A		:					Any						=			upsample_block(_UpperCAmelCase		,      res_hidden_states_tuple=_UpperCAmelCase		,      temb=_UpperCAmelCase)

          # 5. post-process
          if self.out_block:
               __A		:					Dict						=			self.out_block(_UpperCAmelCase		,      _UpperCAmelCase)

          if not return_dict:
               return (sample,)

          return UNetaDOutput(sample=_UpperCAmelCase)