import gc
import torch.cuda
import comfy.model_management

class AnyType(str):
  """A special class that is always equal in not equal comparisons. Credit to pythongosssss"""
  def __eq__(self, __value: object) -> bool:
    return True
  def __ne__(self, __value: object) -> bool:
    return False

any = AnyType("*")

class PurgeVRAMNode:

    def __init__(self):
        pass

    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "anything": (any, {}),
                "purge_cache": ("BOOLEAN", {"default": True}),
                "purge_models": ("BOOLEAN", {"default": True}),
            },
            "optional": {
            }
        }

    RETURN_TYPES = ()
    FUNCTION = "purge_vram"
    CATEGORY = "tbox/other"
    OUTPUT_NODE = True

    def purge_vram(self, anything, purge_cache, purge_models):

        gc.collect()
        if torch.cuda.is_available():
            torch.cuda.empty_cache()
            torch.cuda.ipc_collect()
        if purge_models:
            comfy.model_management.unload_all_models()
            comfy.model_management.soft_empty_cache()
        return (None,)