import copy
from ldm_patched.modules.model_patcher import ModelPatcher


class UnetPatcher(ModelPatcher):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.controlnet_linked_list = None

    def clone(self):
        n = UnetPatcher(self.model, self.load_device, self.offload_device, self.size, self.current_device,
                        weight_inplace_update=self.weight_inplace_update)

        n.patches = {}
        for k in self.patches:
            n.patches[k] = self.patches[k][:]

        n.object_patches = self.object_patches.copy()
        n.model_options = copy.deepcopy(self.model_options)
        n.model_keys = self.model_keys
        n.controlnet_linked_list = self.controlnet_linked_list
        return n

    def add_patched_controlnet(self, cnet):
        cnet.set_previous_controlnet(self.controlnet_linked_list)
        self.controlnet_linked_list = cnet
        return

    def list_controlnets(self):
        results = []
        pointer = self.controlnet_linked_list
        while pointer is not None:
            results.append(pointer)
            pointer = pointer.previous_controlnet
        return results