import spaces
import gradio as gr
import os
import numpy as np
from pydub import AudioSegment
import hashlib
import io
from sonic import Sonic
from PIL import Image
import torch

# 초기 실행 시 필요한 모델들을 다운로드
cmd = (
    'python3 -m pip install "huggingface_hub[cli]" accelerate; '
    'huggingface-cli download LeonJoe13/Sonic --local-dir checkpoints; '
    'huggingface-cli download stabilityai/stable-video-diffusion-img2vid-xt --local-dir  checkpoints/stable-video-diffusion-img2vid-xt; '
    'huggingface-cli download openai/whisper-tiny --local-dir checkpoints/whisper-tiny;'
)
os.system(cmd)

pipe = Sonic()

def get_md5(content_bytes: bytes):
    """MD5 해시를 계산하여 32자리 문자열을 반환"""
    return hashlib.md5(content_bytes).hexdigest()

tmp_path = './tmp_path/'
res_path = './res_path/'
os.makedirs(tmp_path, exist_ok=True)
os.makedirs(res_path, exist_ok=True)

@spaces.GPU(duration=600)  # 긴 비디오 처리를 위해 duration 600초로 설정 (10분)
def get_video_res(img_path, audio_path, res_video_path, dynamic_scale=1.0):
    """
    Sonic pipeline으로부터 실제 비디오를 생성하는 함수.
    최대 60초 길이의 오디오에 대해 inference_steps를 결정하여,
    얼굴 탐지 후 영상 생성 작업을 수행함.
    """
    expand_ratio = 0.0
    min_resolution = 512
    
    # 오디오 길이 계산
    audio = AudioSegment.from_file(audio_path)
    duration = len(audio) / 1000.0  # 초 단위
    
    # 오디오 길이에 따라 inference_steps 결정 (최소 25프레임 ~ 최대 750프레임)
    inference_steps = min(max(int(duration * 12.5), 25), 750)
    print(f"[INFO] Audio duration: {duration:.2f} seconds, using inference_steps={inference_steps}")

    # 얼굴 인식
    face_info = pipe.preprocess(img_path, expand_ratio=expand_ratio)
    print(f"[INFO] Face detection info: {face_info}")

    # 얼굴이 하나라도 검출되면 -> pipeline 진행
    if face_info['face_num'] > 0:
        os.makedirs(os.path.dirname(res_video_path), exist_ok=True)
        pipe.process(
            img_path,
            audio_path,
            res_video_path,
            min_resolution=min_resolution,
            inference_steps=inference_steps,
            dynamic_scale=dynamic_scale
        )
        return res_video_path
    else:
        # 얼굴이 전혀 없으면 -1 리턴
        return -1

def process_sonic(image, audio, dynamic_scale):
    """
    Gradio 인터페이스에서 호출되는 함수:
    1. 이미지/오디오 검사
    2. MD5 해시 -> 파일명
    3. 캐시 검사 -> 없으면 영상 생성
    """
    if image is None:
        raise gr.Error("Please upload an image")
    if audio is None:
        raise gr.Error("Please upload an audio file")

    # (1) 이미지 MD5
    buf_img = io.BytesIO()
    image.save(buf_img, format="PNG")
    img_bytes = buf_img.getvalue()
    img_md5 = get_md5(img_bytes)

    # (2) 오디오 MD5
    sampling_rate, arr = audio[:2]
    if len(arr.shape) == 1:
        arr = arr[:, None]
    audio_segment = AudioSegment(
        arr.tobytes(),
        frame_rate=sampling_rate,
        sample_width=arr.dtype.itemsize,
        channels=arr.shape[1]
    )
    # Whisper 호환을 위해 mono/16kHz로 변환
    audio_segment = audio_segment.set_channels(1).set_frame_rate(16000)

    MAX_DURATION_MS = 60000
    if len(audio_segment) > MAX_DURATION_MS:
        audio_segment = audio_segment[:MAX_DURATION_MS]

    buf_audio = io.BytesIO()
    audio_segment.export(buf_audio, format="wav")
    audio_bytes = buf_audio.getvalue()
    audio_md5 = get_md5(audio_bytes)

    # (3) 파일 경로
    image_path = os.path.abspath(os.path.join(tmp_path, f'{img_md5}.png'))
    audio_path = os.path.abspath(os.path.join(tmp_path, f'{audio_md5}.wav'))
    res_video_path = os.path.abspath(os.path.join(res_path, f'{img_md5}_{audio_md5}_{dynamic_scale}.mp4'))
    
    if not os.path.exists(image_path):
        with open(image_path, "wb") as f:
            f.write(img_bytes)
    if not os.path.exists(audio_path):
        with open(audio_path, "wb") as f:
            f.write(audio_bytes)
    
    # (4) 캐싱된 결과가 있으면 재사용
    if os.path.exists(res_video_path):
        print(f"[INFO] Using cached result: {res_video_path}")
        return res_video_path
    else:
        print(f"[INFO] Generating new video with dynamic_scale={dynamic_scale}")
        video_result = get_video_res(image_path, audio_path, res_video_path, dynamic_scale)
        return video_result

def get_example():
    return []

css = """
.gradio-container {
    font-family: 'Arial', sans-serif;
}
.main-header {
    text-align: center;
    color: #2a2a2a;
    margin-bottom: 2em;
}
.parameter-section {
    background-color: #f5f5f5;
    padding: 1em;
    border-radius: 8px;
    margin: 1em 0;
}
.example-section {
    margin-top: 2em;
}
"""

with gr.Blocks(css=css) as demo:
    gr.HTML("""
        <div class="main-header">
            <h1>🎭 Sonic: Advanced Portrait Animation</h1>
            <p>Transform still images into dynamic videos synchronized with audio (up to 1 minute)</p>
        </div>
    """)
    
    with gr.Row():
        with gr.Column():
            image_input = gr.Image(
                type='pil',
                label="Portrait Image",
                elem_id="image_input"
            )
            audio_input = gr.Audio(
                label="Voice/Audio Input (up to 1 minute)",
                elem_id="audio_input",
                type="numpy"
            )
            with gr.Column():
                dynamic_scale = gr.Slider(
                    minimum=0.5,
                    maximum=2.0,
                    value=1.0,
                    step=0.1,
                    label="Animation Intensity",
                    info="Adjust to control movement intensity (0.5: subtle, 2.0: dramatic)"
                )
            process_btn = gr.Button(
                "Generate Animation",
                variant="primary",
                elem_id="process_btn"
            )
        
        with gr.Column():
            video_output = gr.Video(
                label="Generated Animation",
                elem_id="video_output"
            )
    
    process_btn.click(
        fn=process_sonic,
        inputs=[image_input, audio_input, dynamic_scale],
        outputs=video_output,
    )
    
    gr.Examples(
        examples=get_example(),
        fn=process_sonic,
        inputs=[image_input, audio_input, dynamic_scale],
        outputs=video_output,
        cache_examples=False
    )
    
    gr.HTML("""
        <div style="text-align: center; margin-top: 2em;">
            <div style="margin-bottom: 1em;">
                <a href="https://github.com/jixiaozhong/Sonic" target="_blank" style="text-decoration: none;">
                    <img src="https://img.shields.io/badge/GitHub-Repo-blue?style=for-the-badge&logo=github" alt="GitHub Repo">
                </a>
                <a href="https://arxiv.org/pdf/2411.16331" target="_blank" style="text-decoration: none;">
                    <img src="https://img.shields.io/badge/Paper-arXiv-red?style=for-the-badge&logo=arxiv" alt="arXiv Paper">
                </a>
            </div>
            <p>🔔 Note: For optimal results, use clear portrait images and high-quality audio (now supports up to 1 minute!)</p>
        </div>
    """)

demo.launch(share=True)