import os
import ffmpeg
from datetime import datetime
from pathlib import Path
import numpy as np
import cv2
import torch
from scipy.spatial.transform import Rotation as R
from scipy.interpolate import interp1d

from diffusers import AutoencoderKL, DDIMScheduler
from einops import repeat
from omegaconf import OmegaConf
from PIL import Image
from torchvision import transforms
from transformers import CLIPVisionModelWithProjection


from src.models.pose_guider import PoseGuider
from src.models.unet_2d_condition import UNet2DConditionModel
from src.models.unet_3d import UNet3DConditionModel
from src.pipelines.pipeline_pose2vid_long import Pose2VideoPipeline
from src.utils.util import save_videos_grid

from src.audio_models.model import Audio2MeshModel
from src.utils.audio_util import prepare_audio_feature
from src.utils.mp_utils  import LMKExtractor
from src.utils.draw_util import FaceMeshVisualizer
from src.utils.pose_util import project_points


lmk_extractor = LMKExtractor()
vis = FaceMeshVisualizer(forehead_edge=False)

config = OmegaConf.load('./configs/prompts/animation_audio.yaml')

if config.weight_dtype == "fp16":
    weight_dtype = torch.float16
else:
    weight_dtype = torch.float32
    
audio_infer_config = OmegaConf.load(config.audio_inference_config)
# prepare model
a2m_model = Audio2MeshModel(audio_infer_config['a2m_model'])
a2m_model.load_state_dict(torch.load(audio_infer_config['pretrained_model']['a2m_ckpt']), strict=False)
a2m_model.cuda().eval()

vae = AutoencoderKL.from_pretrained(
    config.pretrained_vae_path,
).to("cuda", dtype=weight_dtype)

reference_unet = UNet2DConditionModel.from_pretrained(
    config.pretrained_base_model_path,
    subfolder="unet",
).to(dtype=weight_dtype, device="cuda")

inference_config_path = config.inference_config
infer_config = OmegaConf.load(inference_config_path)
denoising_unet = UNet3DConditionModel.from_pretrained_2d(
    config.pretrained_base_model_path,
    config.motion_module_path,
    subfolder="unet",
    unet_additional_kwargs=infer_config.unet_additional_kwargs,
).to(dtype=weight_dtype, device="cuda")


pose_guider = PoseGuider(noise_latent_channels=320, use_ca=True).to(device="cuda", dtype=weight_dtype) # not use cross attention

image_enc = CLIPVisionModelWithProjection.from_pretrained(
    config.image_encoder_path
).to(dtype=weight_dtype, device="cuda")

sched_kwargs = OmegaConf.to_container(infer_config.noise_scheduler_kwargs)
scheduler = DDIMScheduler(**sched_kwargs)

# load pretrained weights
denoising_unet.load_state_dict(
    torch.load(config.denoising_unet_path, map_location="cpu"),
    strict=False,
)
reference_unet.load_state_dict(
    torch.load(config.reference_unet_path, map_location="cpu"),
)
pose_guider.load_state_dict(
    torch.load(config.pose_guider_path, map_location="cpu"),
)

pipe = Pose2VideoPipeline(
    vae=vae,
    image_encoder=image_enc,
    reference_unet=reference_unet,
    denoising_unet=denoising_unet,
    pose_guider=pose_guider,
    scheduler=scheduler,
)
pipe = pipe.to("cuda", dtype=weight_dtype)