from comfy_api.latest import io
from pathlib import Path

import folder_paths
import comfy.utils
import comfy.sd

from .logger import logger
from .utils_model import get_available_motion_loras, get_motion_lora_path
from .motion_lora import MotionLoraInfo, MotionLoraList


class AnimateDiffLoraLoader(io.ComfyNode):
    @classmethod
    def define_schema(cls) -> io.Schema:
        return io.Schema(
            node_id='ADE_AnimateDiffLoRALoader',
            display_name='Load AnimateDiff LoRA 🎭🅐🅓',
            category='Animate Diff 🎭🅐🅓',
            inputs=[
                io.Combo.Input('name', options=get_available_motion_loras()),
                io.Float.Input('strength', default=1.0, max=10.0, min=0.0, step=0.001),
                io.Custom("MOTION_LORA").Input('prev_motion_lora', optional=True),
            ],
            outputs=[
                io.Custom("MOTION_LORA").Output('MOTION_LORA'),
            ],
        )
    

    @classmethod
    def execute(cls, name: str, strength: float, prev_motion_lora: MotionLoraList=None, lora_name: str=None):
        if prev_motion_lora is None:
            prev_motion_lora = MotionLoraList()
        else:
            prev_motion_lora = prev_motion_lora.clone()
        if lora_name is not None: # backwards compatibility
            name = lora_name
        # check if motion lora with name exists
        lora_path = get_motion_lora_path(name)
        if not Path(lora_path).is_file():
            raise FileNotFoundError(f"Motion lora with name '{name}' not found.")
        # create motion lora info to be loaded in AnimateDiff Loader
        lora_info = MotionLoraInfo(name=name, strength=strength)
        prev_motion_lora.add_lora(lora_info)

        return io.NodeOutput(prev_motion_lora,)