text: import os
  
  from compression.input_reader import InputReader
  from misc.node import DecodeNode
  from compression.output_writer import OutputWriter
  
  
  class Decoder:
      def __init__(self, inpute_file_name: str):
          self.input_reader = InputReader(inpute_file_name)
  
      def bfs(self, node: DecodeNode):
          if not node:
              return
          queue = [node]
          while len(queue) != 0:
              cur = queue.pop(0)
              if not cur.right and not cur.left:
                  print(f'{cur.character}  -->  {cur.code}')
              if cur.left:
                  queue.append(cur.left)
              if cur.right:
                  queue.append(cur.right)
  
      def build_decode_tree(self, huffman_codes: dict):
          self.decode_root = DecodeNode()
          for code, character in huffman_codes.items():
              self.__add_node_in_decode_tree(0, code, self.decode_root, character)
  
      def __add_node_in_decode_tree(self, pos_in_code: int, code: str, node: DecodeNode, character: str):
          if pos_in_code == len(code):
              node.character = character
              node.code = code
              return
          if code[pos_in_code] == '0':
              if node.left == None:
                  node.left = DecodeNode()
              self.__add_node_in_decode_tree(pos_in_code + 1, code, node.left, character)
          else:
              if node.right == None:
                  node.right = DecodeNode()
              self.__add_node_in_decode_tree(pos_in_code + 1, code, node.right, character)
  
      def read_character(self, bits, node: DecodeNode):
          if node.character != None:
              return node.character
          return self.read_character(bits, node.left) if (bits.popleft() == '0') else self.read_character(bits,
                                                                                                          node.right)
  
      def create_path_if_it_dont_exist(self, path):
          slash_index = path.rfind("\\")
          if slash_index != -1:
              dir_path = path[:slash_index]
              if not os.path.exists(dir_path):
                  os.makedirs(dir_path)
  
      def modify_name(self, path):
          file_name = os.path.basename(path)
          index_of_point = file_name.rfind('.')
          if (index_of_point == -1):
              input_path = file_name + '_decoded'
          else:
              input_path = file_name[0:index_of_point] + '_decoded' + file_name[index_of_point:]
          return os.path.join(os.path.dirname(path), input_path)
  
      def decode(self):
          huffman_codes = self.input_reader.read_meta_data()
          self.build_decode_tree(huffman_codes)
          # self.bfs(self.decode_root)
          path = self.input_reader.read_path()
  
          while len(path) > 0:
              # check if directory is there
              modified_path = self.modify_name(path)
              self.create_path_if_it_dont_exist(modified_path)
              output_writer = OutputWriter(modified_path)
              compressed_length, last_bits = self.input_reader.read_compression_lengths()
  
              bits = self.input_reader.get_compressed_bits(compressed_length, last_bits)
              if len(bits) != 0:
                  character = self.read_character(bits, self.decode_root)
                  output_writer.write_to_file(character)
              while len(bits) > 0:
                  character = self.read_character(bits, self.decode_root)
                  output_writer.write_to_file(character)
              output_writer.close()
              path = self.input_reader.read_path()
  
          self.input_reader.close()
          return huffman_codes
  