import tensorflow as tf

from onnx_tf.handlers.backend_handler import BackendHandler
from onnx_tf.handlers.handler import onnx_op
from onnx_tf.handlers.handler import tf_func


@onnx_op("Concat")
@tf_func(tf.concat)
class Concat(BackendHandler):

  @classmethod
  def _common(cls, node, **kwargs):
    inputs = [kwargs["tensor_dict"][inp] for inp in node.inputs]
    return [cls.make_tensor_from_onnx_node(node, inputs=[inputs])]

  @classmethod
  def version_1(cls, node, **kwargs):
    return cls._common(node, **kwargs)

  @classmethod
  def version_4(cls, node, **kwargs):
    return cls._common(node, **kwargs)
