#!/usr/bin/env python
# -*- coding: UTF-8 -*-
'''
webui
'''

import spaces
import os
import random
from datetime import datetime
from pathlib import Path

import cv2
import numpy as np
import torch
from diffusers import AutoencoderKL, DDIMScheduler
from omegaconf import OmegaConf
from PIL import Image
from src.models.unet_2d_condition import UNet2DConditionModel
from src.models.unet_3d_echo import EchoUNet3DConditionModel
from src.models.whisper.audio2feature import load_audio_model
from src.pipelines.pipeline_echo_mimic import Audio2VideoPipeline
from src.utils.util import save_videos_grid, crop_and_pad
from src.models.face_locator import FaceLocator
from moviepy.editor import VideoFileClip, AudioFileClip
from facenet_pytorch import MTCNN
import argparse

import gradio as gr
from gradio_client import Client, handle_file
from pydub import AudioSegment
import huggingface_hub 

huggingface_hub.snapshot_download(
    repo_id='BadToBest/EchoMimic',
    local_dir='./pretrained_weights'
)

is_shared_ui = True if "fffiloni/EchoMimic" in os.environ['SPACE_ID'] else False
available_property = False if is_shared_ui else True
advanced_settings_label = "Advanced Configuration (only for duplicated spaces)" if is_shared_ui else "Advanced Configuration"

default_values = {
    "width": 512,
    "height": 512,
    "length": 1200,
    "seed": 420,
    "facemask_dilation_ratio": 0.1,
    "facecrop_dilation_ratio": 0.5,
    "context_frames": 12,
    "context_overlap": 3,
    "cfg": 2.5,
    "steps": 30,
    "sample_rate": 16000,
    "fps": 24,
    "device": "cuda"
}

ffmpeg_path = os.getenv('FFMPEG_PATH')
if ffmpeg_path is None:
    print("please download ffmpeg-static and export to FFMPEG_PATH. \nFor example: export FFMPEG_PATH=/musetalk/ffmpeg-4.4-amd64-static")
elif ffmpeg_path not in os.getenv('PATH'):
    print("add ffmpeg to path")
    os.environ["PATH"] = f"{ffmpeg_path}:{os.environ['PATH']}"


config_path = "./configs/prompts/animation.yaml"
config = OmegaConf.load(config_path)
if config.weight_dtype == "fp16":
    weight_dtype = torch.float16
else:
    weight_dtype = torch.float32

device = "cuda"
if not torch.cuda.is_available():
    device = "cpu"

inference_config_path = config.inference_config
infer_config = OmegaConf.load(inference_config_path)

############# model_init started #############
## vae init
vae = AutoencoderKL.from_pretrained(config.pretrained_vae_path).to("cuda", dtype=weight_dtype)

## reference net init
reference_unet = UNet2DConditionModel.from_pretrained(
    config.pretrained_base_model_path,
    subfolder="unet",
).to(dtype=weight_dtype, device=device)
reference_unet.load_state_dict(torch.load(config.reference_unet_path, map_location="cpu"))

## denoising net init
if os.path.exists(config.motion_module_path):
    ### stage1 + stage2
    denoising_unet = EchoUNet3DConditionModel.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=device)
else:
    ### only stage1
    denoising_unet = EchoUNet3DConditionModel.from_pretrained_2d(
        config.pretrained_base_model_path,
        "",
        subfolder="unet",
        unet_additional_kwargs={
            "use_motion_module": False,
            "unet_use_temporal_attention": False,
            "cross_attention_dim": infer_config.unet_additional_kwargs.cross_attention_dim
        }
    ).to(dtype=weight_dtype, device=device)

denoising_unet.load_state_dict(torch.load(config.denoising_unet_path, map_location="cpu"), strict=False)

## face locator init
face_locator = FaceLocator(320, conditioning_channels=1, block_out_channels=(16, 32, 96, 256)).to(dtype=weight_dtype, device="cuda")
face_locator.load_state_dict(torch.load(config.face_locator_path))

## load audio processor params
audio_processor = load_audio_model(model_path=config.audio_model_path, device=device)

## load face detector params
face_detector = MTCNN(image_size=320, margin=0, min_face_size=20, thresholds=[0.6, 0.7, 0.7], factor=0.709, post_process=True, device=device)

############# model_init finished #############

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

pipe = Audio2VideoPipeline(
    vae=vae,
    reference_unet=reference_unet,
    denoising_unet=denoising_unet,
    audio_guider=audio_processor,
    face_locator=face_locator,
    scheduler=scheduler,
).to("cuda", dtype=weight_dtype)

def ensure_png(image_path):
    # Load the image with Pillow
    with Image.open(image_path) as img:
        # Check if the image is already a PNG
        if img.format != "PNG":
            # Convert and save as PNG
            png_path = os.path.splitext(image_path)[0] + ".png"
            img.save(png_path, format="PNG")
            print(f"Image converted to PNG and saved as {png_path}")
            return png_path
        else:
            print("Image is already a PNG.")
            return image_path

def select_face(det_bboxes, probs):
    ## max face from faces that the prob is above 0.8
    ## box: xyxy
    if det_bboxes is None or probs is None:
        return None
    filtered_bboxes = []
    for bbox_i in range(len(det_bboxes)):
        if probs[bbox_i] > 0.8:
            filtered_bboxes.append(det_bboxes[bbox_i])
    if len(filtered_bboxes) == 0:
        return None
    sorted_bboxes = sorted(filtered_bboxes, key=lambda x:(x[3]-x[1]) * (x[2] - x[0]), reverse=True)
    return sorted_bboxes[0]

def process_video(uploaded_img, uploaded_audio, width, height, length, seed, facemask_dilation_ratio, facecrop_dilation_ratio, context_frames, context_overlap, cfg, steps, sample_rate, fps, device):

    if seed is not None and seed > -1:
        generator = torch.manual_seed(seed)
    else:
        generator = torch.manual_seed(random.randint(100, 1000000))

    uploaded_img = ensure_png(uploaded_img)

    #### face mask prepare
    face_img = cv2.imread(uploaded_img)
    
    # Get the original dimensions
    original_height, original_width = face_img.shape[:2]
    
    # Set the new width to 512 pixels
    new_width = 512
    
    # Calculate the new height with the same aspect ratio
    new_height = int(original_height * (new_width / original_width))
    
    # Ensure both width and height are divisible by 8
    new_width = (new_width // 8) * 8  # Force target width to be divisible by 8
    new_height = (new_height // 8) * 8   # Floor the height to the nearest multiple of 8
    

    # Resize the image to the calculated dimensions
    face_img = cv2.resize(face_img, (new_width, new_height))
    
    face_mask = np.zeros((face_img.shape[0], face_img.shape[1])).astype('uint8')
    det_bboxes, probs = face_detector.detect(face_img)
    select_bbox = select_face(det_bboxes, probs)
    if select_bbox is None:
        print("SELECT_BBOX IS NONE")
        face_mask[:, :] = 255
        face_img = cv2.resize(face_img, (width, height))
        face_mask = cv2.resize(face_mask, (width, height))
        raise gr.Error("Face Detector could not detect a face in your image. Try with a 512 squared image where the face is clearly visible.")
    else:
        print("SELECT_BBOX IS NOT NONE")
        xyxy = select_bbox[:4]
        xyxy = np.round(xyxy).astype('int')
        rb, re, cb, ce = xyxy[1], xyxy[3], xyxy[0], xyxy[2]
        r_pad = int((re - rb) * facemask_dilation_ratio)
        c_pad = int((ce - cb) * facemask_dilation_ratio)
        face_mask[rb - r_pad : re + r_pad, cb - c_pad : ce + c_pad] = 255
        
        #### face crop
        r_pad_crop = int((re - rb) * facecrop_dilation_ratio)
        c_pad_crop = int((ce - cb) * facecrop_dilation_ratio)
        crop_rect = [max(0, cb - c_pad_crop), max(0, rb - r_pad_crop), min(ce + c_pad_crop, face_img.shape[1]), min(re + r_pad_crop, face_img.shape[0])]
        face_img = crop_and_pad(face_img, crop_rect)
        face_mask = crop_and_pad(face_mask, crop_rect)
        face_img = cv2.resize(face_img, (width, height))
        face_mask = cv2.resize(face_mask, (width, height))

    ref_image_pil = Image.fromarray(face_img[:, :, [2, 1, 0]])
    face_mask_tensor = torch.Tensor(face_mask).to(dtype=weight_dtype, device="cuda").unsqueeze(0).unsqueeze(0).unsqueeze(0) / 255.0
    
    video = pipe(
        ref_image_pil,
        uploaded_audio,
        face_mask_tensor,
        width,
        height,
        length,
        steps,
        cfg,
        generator=generator,
        audio_sample_rate=sample_rate,
        context_frames=context_frames,
        fps=fps,
        context_overlap=context_overlap
    ).videos

    save_dir = Path("output/tmp")
    save_dir.mkdir(exist_ok=True, parents=True)
    output_video_path = save_dir / "output_video.mp4"
    save_videos_grid(video, str(output_video_path), n_rows=1, fps=fps)

    video_clip = VideoFileClip(str(output_video_path))
    audio_clip = AudioFileClip(uploaded_audio)
    final_output_path = save_dir / "output_video_with_audio.mp4"
    video_clip = video_clip.set_audio(audio_clip)
    video_clip.write_videofile(str(final_output_path), codec="libx264", audio_codec="aac")

    return final_output_path

def trim_audio(file_path, output_path, max_duration=5):
    # Load the audio file
    audio = AudioSegment.from_wav(file_path)
    
    # Convert max duration to milliseconds
    max_duration_ms = max_duration * 1000
    
    # Trim the audio if it's longer than max_duration
    if len(audio) > max_duration_ms:
        audio = audio[:max_duration_ms]
    
    # Export the trimmed audio
    audio.export(output_path, format="wav")
    print(f"Audio trimmed and saved as {output_path}")
    return output_path

@spaces.GPU(duration=200)
def generate_video(uploaded_img, uploaded_audio, width, height, length, seed, facemask_dilation_ratio, facecrop_dilation_ratio, context_frames, context_overlap, cfg, steps, sample_rate, fps, device, progress=gr.Progress(track_tqdm=True)):
    """
    Generate a realistic lip-synced talking head video from a static reference image and a voice audio file.

    This function takes an image of a face and an audio clip, then generates a video where the face in the image is animated to match the speech in the audio. It uses EchoMimic's pipeline with configurable parameters for generation quality, length, and face conditioning.

    Args:
        uploaded_img (str): Path to the input reference image. This should be a front-facing, clear image of a person's face.
        uploaded_audio (str): Path to the WAV audio file to drive the animation. Speech audio works best.
        width (int): Target width of the generated video frame.
        height (int): Target height of the generated video frame.
        length (int): Number of frames in the final output video.
        seed (int): Random seed for reproducibility. If -1, a random seed is chosen.
        facemask_dilation_ratio (float): Dilation ratio for expanding the face mask region.
        facecrop_dilation_ratio (float): Dilation ratio for cropping the face region from the image.
        context_frames (int): Number of context frames used in temporal modeling.
        context_overlap (int): Number of overlapping frames between chunks.
        cfg (float): Classifier-Free Guidance scale. Higher values make outputs more faithful to input conditions.
        steps (int): Number of denoising steps in the diffusion process.
        sample_rate (int): Audio sample rate in Hz (e.g., 16000).
        fps (int): Frames per second in the output video.
        device (str): Device to run the computation on ("cuda" or "cpu").
        progress (gr.Progress): Gradio progress tracker for UI display.

    Returns:
        str: File path to the final output video with synchronized audio.
    
    Notes:
        - Input image should clearly show a single face, ideally centered and facing forward.
        - Audio should be speech or vocals; music or noise may produce unpredictable results.
        - The function trims audio to 5 seconds in shared UI mode to reduce compute time.
        - This function is designed to work on a GPU-enabled environment for optimal performance.
    """    

    gr.Info("200 seconds will be allocated from your daily ZeroGPU credits.")
    
    if is_shared_ui:
        gr.Info("Trimming audio to max 5 seconds. Duplicate the space for unlimited audio length.")
        uploaded_audio = trim_audio(uploaded_audio, "trimmed_audio.wav")

        
            
    final_output_path = process_video(
        uploaded_img, uploaded_audio, width, height, length, seed, facemask_dilation_ratio, facecrop_dilation_ratio, context_frames, context_overlap, cfg, steps, sample_rate, fps, device
    )        
    output_video= final_output_path
    return final_output_path

def get_maskGCT_TTS(prompt_audio_maskGCT, audio_to_clone):
    try:
        client = Client("amphion/maskgct")
    except:
        raise gr.Error(f"amphion/maskgct space's api might not be ready, please wait, or upload an audio instead.")
    
    result = client.predict(
        prompt_wav = handle_file(audio_to_clone),
        target_text = prompt_audio_maskGCT,
        target_len=-1,
		n_timesteps=25,
		api_name="/predict"
    )
    print(result) 
    return result, gr.update(value=result, visible=True)
  
with gr.Blocks() as demo:
    gr.Markdown('# EchoMimic')
    gr.Markdown('## Lifelike Audio-Driven Portrait Animations through Editable Landmark Conditioning')
    gr.Markdown('Inference time: from ~7mins/240frames to ~50s/240frames on V100 GPU')
    gr.HTML("""
    <div style="display:flex;column-gap:4px;">
        <a href='https://badtobest.github.io/echomimic.html'><img src='https://img.shields.io/badge/Project-Page-blue'></a>
        <a href='https://huggingface.co/BadToBest/EchoMimic'><img src='https://img.shields.io/badge/%F0%9F%A4%97%20HuggingFace-Model-yellow'></a>
        <a href='https://arxiv.org/abs/2407.08136'><img src='https://img.shields.io/badge/Paper-Arxiv-red'></a>
    </div>
    """)
    with gr.Row():
        with gr.Column():
            uploaded_img = gr.Image(type="filepath", label="Reference Image")
            uploaded_audio = gr.Audio(type="filepath", label="Input Audio", format="wav")
            preprocess_audio_file = gr.File(visible=False)
            with gr.Accordion(label="Voice cloning with MaskGCT", open=False):
                prompt_audio_maskGCT = gr.Textbox(
                    label = "Text to synthetize",
                    lines = 2,
                    max_lines = 2,
                    elem_id = "text-synth-maskGCT"
                )
                audio_to_clone_maskGCT = gr.Audio(
                    label = "Voice to clone",
                    type = "filepath",
                    elem_id = "audio-clone-elm-maskGCT"
                )
                gen_maskGCT_voice_btn = gr.Button("Generate voice clone (optional)")
            with gr.Accordion(label=advanced_settings_label, open=False):
                with gr.Row():
                    width = gr.Slider(label="Width", minimum=128, maximum=1024, value=default_values["width"], interactive=available_property)
                    height = gr.Slider(label="Height", minimum=128, maximum=1024, value=default_values["height"], interactive=available_property)
                with gr.Row():
                    length = gr.Slider(label="Length", minimum=100, maximum=5000, value=default_values["length"], interactive=available_property)
                    seed = gr.Slider(label="Seed", minimum=0, maximum=10000, value=default_values["seed"], interactive=available_property)
                with gr.Row():
                    facemask_dilation_ratio = gr.Slider(label="Facemask Dilation Ratio", minimum=0.0, maximum=1.0, step=0.01, value=default_values["facemask_dilation_ratio"], interactive=available_property)
                    facecrop_dilation_ratio = gr.Slider(label="Facecrop Dilation Ratio", minimum=0.0, maximum=1.0, step=0.01, value=default_values["facecrop_dilation_ratio"], interactive=available_property)
                with gr.Row():
                    context_frames = gr.Slider(label="Context Frames", minimum=0, maximum=50, step=1, value=default_values["context_frames"], interactive=available_property)
                    context_overlap = gr.Slider(label="Context Overlap", minimum=0, maximum=10, step=1, value=default_values["context_overlap"], interactive=available_property)
                with gr.Row():
                    cfg = gr.Slider(label="CFG", minimum=0.0, maximum=10.0, step=0.1, value=default_values["cfg"], interactive=available_property)
                    steps = gr.Slider(label="Steps", minimum=1, maximum=100, step=1, value=default_values["steps"], interactive=available_property)
                with gr.Row():
                    sample_rate = gr.Slider(label="Sample Rate", minimum=8000, maximum=48000, step=1000, value=default_values["sample_rate"], interactive=available_property)
                    fps = gr.Slider(label="FPS", minimum=1, maximum=60, step=1, value=default_values["fps"], interactive=available_property)
                    device = gr.Radio(label="Device", choices=["cuda", "cpu"], value=default_values["device"], interactive=available_property)
            generate_button = gr.Button("Generate Video")
        with gr.Column():
            output_video = gr.Video()
            gr.Examples(
                label = "Portrait examples",
                examples = [
                    ['assets/test_imgs/a.png'],
                    ['assets/test_imgs/b.png'],
                    ['assets/test_imgs/c.png'],
                    ['assets/test_imgs/d.png'],
                    ['assets/test_imgs/e.png']
                ],
                inputs = [uploaded_img]
            )
            gr.Examples(
                label = "Audio examples",
                examples = [
                    ['assets/test_audios/chunnuanhuakai.wav'],
                    ['assets/test_audios/chunwang.wav'],
                    ['assets/test_audios/echomimic_en_girl.wav'],
                    ['assets/test_audios/echomimic_en.wav'],
                    ['assets/test_audios/echomimic_girl.wav'],
                    ['assets/test_audios/echomimic.wav'],
                    ['assets/test_audios/jane.wav'],
                    ['assets/test_audios/mei.wav'],
                    ['assets/test_audios/walden.wav'],
                    ['assets/test_audios/yun.wav'],
                ],
                inputs = [uploaded_audio]
            )
            gr.HTML("""
            <div style="display:flex;column-gap:4px;">
                <a href="https://huggingface.co/spaces/fffiloni/EchoMimic?duplicate=true">
                    <img src="https://huggingface.co/datasets/huggingface/badges/resolve/main/duplicate-this-space-xl.svg" alt="Duplicate this Space">
                </a>
                <a href="https://huggingface.co/fffiloni">
                    <img src="https://huggingface.co/datasets/huggingface/badges/resolve/main/follow-me-on-HF-xl-dark.svg" alt="Follow me on HF">
                </a>
            </div>
            """)    

    gen_maskGCT_voice_btn.click(
        fn = get_maskGCT_TTS,
        inputs = [prompt_audio_maskGCT, audio_to_clone_maskGCT],
        outputs = [uploaded_audio, preprocess_audio_file],
        queue = False,
        show_api = False
    )

    generate_button.click(
        generate_video,
        inputs=[
            uploaded_img,
            uploaded_audio,
            width,
            height,
            length,
            seed,
            facemask_dilation_ratio,
            facecrop_dilation_ratio,
            context_frames,
            context_overlap,
            cfg,
            steps,
            sample_rate,
            fps,
            device
        ],
        outputs=output_video,
        show_api=True
    )
parser = argparse.ArgumentParser(description='EchoMimic')
parser.add_argument('--server_name', type=str, default='0.0.0.0', help='Server name')
parser.add_argument('--server_port', type=int, default=7680, help='Server port')
args = parser.parse_args()

# demo.launch(server_name=args.server_name, server_port=args.server_port, inbrowser=True)

if __name__ == '__main__':
    demo.queue(max_size=3).launch(show_api=True, show_error=True, ssr_mode=False, mcp_server=True)
    #demo.launch(server_name=args.server_name, server_port=args.server_port, inbrowser=True)