"""The original Context Switch."""
from .constants import get_category, get_name
from .context_utils import (ORIG_CTX_RETURN_TYPES, ORIG_CTX_RETURN_NAMES, is_context_empty,
                            get_orig_context_return_tuple)


class RgthreeContextSwitch:
  """The initial Context Switch node.

  For now, this will remain as-is but is otherwise backwards compatible with other Context nodes
  outputs.
  """

  NAME = get_name("Context Switch")
  CATEGORY = get_category()

  @classmethod
  def INPUT_TYPES(cls):  # pylint: disable = invalid-name, missing-function-docstring
    return {
      "required": {},
      "optional": {
        "ctx_01": ("RGTHREE_CONTEXT",),
        "ctx_02": ("RGTHREE_CONTEXT",),
        "ctx_03": ("RGTHREE_CONTEXT",),
        "ctx_04": ("RGTHREE_CONTEXT",),
        "ctx_05": ("RGTHREE_CONTEXT",),
      },
    }

  RETURN_TYPES = ORIG_CTX_RETURN_TYPES
  RETURN_NAMES = ORIG_CTX_RETURN_NAMES
  FUNCTION = "switch"

  def switch(self, ctx_01=None, ctx_02=None, ctx_03=None, ctx_04=None, ctx_05=None):
    """Chooses the first non-empty Context to output.

    As of right now, this returns the "original" context. We could expand it, or create another
    "Context Big Switch" and have all the outputs...
    """
    ctx = None
    if not is_context_empty(ctx_01):
      ctx = ctx_01
    elif not is_context_empty(ctx_02):
      ctx = ctx_02
    elif not is_context_empty(ctx_03):
      ctx = ctx_03
    elif not is_context_empty(ctx_04):
      ctx = ctx_04
    elif not is_context_empty(ctx_05):
      ctx = ctx_05
    return get_orig_context_return_tuple(ctx)