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import os
import time
import glob
import json
import numpy as np
import trimesh
from PIL import Image, ImageDraw
import math
import trimesh.transformations as tf

os.environ['PYOPENGL_PLATFORM'] = 'egl'

import gradio as gr
import spaces

# κ²°κ³Ό μ €μž₯ 경둜
LOG_PATH = './results/demo'
os.makedirs(LOG_PATH, exist_ok=True)

def create_textual_animation_gif(output_path, model_name, animation_type, duration=3.0, fps=30):
    """ν…μŠ€νŠΈ 기반의 κ°„λ‹¨ν•œ μ• λ‹ˆλ©”μ΄μ…˜ GIF 생성"""
    try:
        frames = []
        num_frames = int(duration * fps)
        if num_frames > 60:
            num_frames = 60
            
        for i in range(num_frames):
            t = i / (num_frames - 1)
            angle = t * 360
            
            img = Image.new('RGB', (640, 480), color=(240, 240, 240))
            draw = ImageDraw.Draw(img)
            
            draw.text((50, 50), f"Model: {os.path.basename(model_name)}", fill=(0, 0, 0))
            draw.text((50, 100), f"Animation Type: {animation_type}", fill=(0, 0, 0))
            draw.text((50, 150), f"Frame: {i+1}/{num_frames}", fill=(0, 0, 0))
            
            # μ• λ‹ˆλ©”μ΄μ…˜ μœ ν˜•λ³„ μ‹œκ°ν™”
            center_x, center_y = 320, 240
            if animation_type == 'rotate':
                radius = 100
                x = center_x + radius * math.cos(math.radians(angle))
                y = center_y + radius * math.sin(math.radians(angle))
                draw.rectangle((x-40, y-40, x+40, y+40), outline=(0, 0, 0), fill=(255, 0, 0))
            elif animation_type == 'float':
                offset_y = 50 * math.sin(2 * math.pi * t)
                draw.ellipse((center_x-50, center_y-50+offset_y, center_x+50, center_y+50+offset_y), 
                           outline=(0, 0, 0), fill=(0, 0, 255))
            elif animation_type in ['explode', 'assemble']:
                scale = t if animation_type == 'explode' else 1 - t
                for j in range(8):
                    angle_j = j * 45
                    dist = 120 * scale
                    x = center_x + dist * math.cos(math.radians(angle_j))
                    y = center_y + dist * math.sin(math.radians(angle_j))
                    
                    if j % 3 == 0:
                        draw.rectangle((x-20, y-20, x+20, y+20), outline=(0, 0, 0), fill=(255, 0, 0))
                    elif j % 3 == 1:
                        draw.ellipse((x-20, y-20, x+20, y+20), outline=(0, 0, 0), fill=(0, 255, 0))
                    else:
                        draw.polygon([(x, y-20), (x+20, y+20), (x-20, y+20)], outline=(0, 0, 0), fill=(0, 0, 255))
            elif animation_type == 'pulse':
                scale = 0.5 + 0.5 * math.sin(2 * math.pi * t)
                radius = 100 * scale
                draw.ellipse((center_x-radius, center_y-radius, center_x+radius, center_y+radius), 
                           outline=(0, 0, 0), fill=(0, 255, 0))
            elif animation_type == 'swing':
                angle_offset = 30 * math.sin(2 * math.pi * t)
                points = [
                    (center_x + 100 * math.cos(math.radians(angle_offset)), center_y - 80),
                    (center_x + 100 * math.cos(math.radians(120 + angle_offset)), center_y + 40),
                    (center_x + 100 * math.cos(math.radians(240 + angle_offset)), center_y + 40)
                ]
                draw.polygon(points, outline=(0, 0, 0), fill=(255, 165, 0))
            
            frames.append(img)
        
        frames[0].save(
            output_path,
            save_all=True,
            append_images=frames[1:],
            optimize=False,
            duration=int(1000 / fps),
            loop=0
        )
        print(f"Created textual animation GIF at {output_path}")
        return output_path
    except Exception as e:
        print(f"Error creating textual animation: {str(e)}")
        return None

def modify_glb_file(input_glb_path, output_glb_path, animation_type='rotate'):
    """μ—…λ‘œλ“œλœ GLB νŒŒμΌμ„ μˆ˜μ •ν•˜μ—¬ μ• λ‹ˆλ©”μ΄μ…˜ 효과λ₯Ό μ£ΌλŠ” ν•¨μˆ˜"""
    try:
        # κ°„λ‹¨ν•œ 방법: 원본 νŒŒμΌμ„ κ·ΈλŒ€λ‘œ λ‘œλ“œν•˜μ—¬ 단일 λ³€ν™˜ 적용 ν›„ μ €μž₯
        # μ—¬λŸ¬ λ‹¨κ³„λ‘œ λ‚˜λˆ„μ–΄ μ²˜λ¦¬ν•˜μ—¬ 각 λ‹¨κ³„μ—μ„œ 였λ₯˜λ₯Ό 확인할 수 μžˆλ„λ‘ 함
        
        print(f"Step 1: Loading GLB file '{input_glb_path}'")
        scene = trimesh.load(input_glb_path)
        print(f"Loaded GLB file, type: {type(scene)}")
        
        print(f"Step 2: Preparing transformation for animation type: {animation_type}")
        # λ‹¨μˆœν™”λœ λ³€ν™˜ μ€€λΉ„ - μ• λ‹ˆλ©”μ΄μ…˜ μœ ν˜•λ³„λ‘œ λ‹€λ₯Έ λ³€ν™˜ 적용
        transform = np.eye(4)  # κΈ°λ³Έ ν•­λ“± λ³€ν™˜ (아무 λ³€ν™” μ—†μŒ)
        
        if animation_type == 'rotate':
            # YμΆ• κΈ°μ€€ 45도 νšŒμ „
            transform = tf.rotation_matrix(math.pi/4, [0, 1, 0])
        elif animation_type == 'float':
            # μœ„λ‘œ 이동
            transform = tf.translation_matrix([0, 0.5, 0])
        elif animation_type == 'pulse':
            # 크기 ν™•λŒ€
            transform = tf.scale_matrix(1.2)
        elif animation_type == 'explode':
            # XμΆ• λ°©ν–₯으둜 μ•½κ°„ 이동
            transform = tf.translation_matrix([0.5, 0, 0])
        elif animation_type == 'assemble':
            # XμΆ• λ°©ν–₯으둜 μ•½κ°„ 이동 (λ°˜λŒ€ λ°©ν–₯)
            transform = tf.translation_matrix([-0.5, 0, 0])
        elif animation_type == 'swing':
            # ZμΆ• κΈ°μ€€ μ•½κ°„ νšŒμ „
            transform = tf.rotation_matrix(math.pi/8, [0, 0, 1])
        
        print(f"Step 3: Applying transformation to scene")
        if isinstance(scene, trimesh.Scene):
            # Scene인 경우 직접 λ³€ν™˜ 적용
            scene.apply_transform(transform)
            print(f"Applied transform to scene")
        else:
            print(f"Scene is not trimesh.Scene, but {type(scene)}")
        
        print(f"Step 4: Exporting modified scene to '{output_glb_path}'")
        scene.export(output_glb_path)
        print(f"Successfully exported modified GLB to '{output_glb_path}'")
        
        return output_glb_path
    
    except Exception as e:
        print(f"Error modifying GLB file: {str(e)}")
        
        # 였λ₯˜ λ°œμƒ μ‹œ 원본 파일 볡사
        try:
            import shutil
            print(f"Copying original GLB file as fallback")
            shutil.copy(input_glb_path, output_glb_path)
            print(f"Successfully copied original GLB to '{output_glb_path}'")
            return output_glb_path
        except Exception as copy_error:
            print(f"Error copying GLB: {copy_error}")
            return input_glb_path  # 원본 파일 경둜 λ°˜ν™˜

@spaces.GPU
def process_3d_model(input_3d, animation_type, animation_duration, fps):
    """Process a 3D model and apply animation"""
    print(f"Processing: {input_3d} with animation type: {animation_type}")
    
    try:
        # 파일λͺ… μ€€λΉ„
        base_filename = os.path.basename(input_3d).rsplit('.', 1)[0]
        animated_glb_path = os.path.join(LOG_PATH, f'animated_{base_filename}.glb')
        animated_gif_path = os.path.join(LOG_PATH, f'text_animated_{base_filename}.gif')
        json_path = os.path.join(LOG_PATH, f'metadata_{base_filename}.json')
        
        # 1. GLB 파일 μˆ˜μ •
        print(f"Modifying GLB file")
        modified_glb = modify_glb_file(input_3d, animated_glb_path, animation_type)
        
        # 2. μ• λ‹ˆλ©”μ΄μ…˜ GIF 생성 (μ–΄λ–€ κ²½μš°μ—λ„ 항상 생성)
        print(f"Creating animation GIF")
        animated_gif = create_textual_animation_gif(
            animated_gif_path,
            os.path.basename(input_3d),
            animation_type,
            animation_duration,
            fps
        )
        
        # 3. 메타데이터 생성
        print(f"Creating metadata")
        metadata = {
            "animation_type": animation_type,
            "duration": animation_duration,
            "fps": fps,
            "original_model": os.path.basename(input_3d),
            "created_at": time.strftime("%Y-%m-%d %H:%M:%S")
        }
        
        with open(json_path, 'w') as f:
            json.dump(metadata, f, indent=4)
        
        print(f"Processing complete, returning results")
        return modified_glb, animated_gif, json_path
        
    except Exception as e:
        print(f"Error in process_3d_model: {str(e)}")
        # μ‹¬κ°ν•œ 였λ₯˜ λ°œμƒ μ‹œ 원본 파일과 κΈ°λ³Έ GIF λ°˜ν™˜
        try:
            base_filename = os.path.basename(input_3d).rsplit('.', 1)[0]
            animated_gif_path = os.path.join(LOG_PATH, f'text_animated_{base_filename}.gif')
            create_textual_animation_gif(
                animated_gif_path,
                os.path.basename(input_3d),
                animation_type,
                animation_duration,
                fps
            )
            return input_3d, animated_gif_path, None
        except:
            return f"Error processing file: {str(e)}", None, None

# Gradio μΈν„°νŽ˜μ΄μŠ€ μ„€μ •
with gr.Blocks(title="GLB μ• λ‹ˆλ©”μ΄μ…˜ 생성기") as demo:
    # 제λͺ© μ„Ήμ…˜
    gr.Markdown("""
    <h2><b>GLB μ• λ‹ˆλ©”μ΄μ…˜ 생성기 - 3D λͺ¨λΈ μ›€μ§μž„ 효과</b></h2>

    이 데λͺ¨λ₯Ό 톡해 정적인 3D λͺ¨λΈ(GLB 파일)에 λ‹€μ–‘ν•œ μ• λ‹ˆλ©”μ΄μ…˜ 효과λ₯Ό μ μš©ν•  수 μžˆμŠ΅λ‹ˆλ‹€.

    ❗️❗️❗️**μ€‘μš”μ‚¬ν•­:**
    - 이 데λͺ¨λŠ” μ—…λ‘œλ“œλœ GLB νŒŒμΌμ— μ• λ‹ˆλ©”μ΄μ…˜μ„ μ μš©ν•©λ‹ˆλ‹€.
    - λ‹€μ–‘ν•œ μ• λ‹ˆλ©”μ΄μ…˜ μŠ€νƒ€μΌ μ€‘μ—μ„œ μ„ νƒν•˜μ„Έμš”: νšŒμ „, λΆ€μœ , 폭발, 쑰립, νŽ„μŠ€, μŠ€μœ™.
    - κ²°κ³ΌλŠ” μ• λ‹ˆλ©”μ΄μ…˜λœ GLB 파일과 미리보기용 GIF 파일둜 μ œκ³΅λ©λ‹ˆλ‹€.
    """)
    
    with gr.Row():
        with gr.Column():
            # μž…λ ₯ μ»΄ν¬λ„ŒνŠΈ
            input_3d = gr.Model3D(label="3D λͺ¨λΈ 파일 μ—…λ‘œλ“œ (GLB 포맷)")
            
            with gr.Row():
                animation_type = gr.Dropdown(
                    label="μ• λ‹ˆλ©”μ΄μ…˜ μœ ν˜•", 
                    choices=["rotate", "float", "explode", "assemble", "pulse", "swing"],
                    value="rotate"
                )
            
            with gr.Row():
                animation_duration = gr.Slider(
                    label="μ• λ‹ˆλ©”μ΄μ…˜ 길이 (초)",
                    minimum=1.0,
                    maximum=10.0,
                    value=3.0,
                    step=0.5
                )
                fps = gr.Slider(
                    label="μ΄ˆλ‹Ή ν”„λ ˆμž„ 수",
                    minimum=15,
                    maximum=60,
                    value=30,
                    step=1
                )
            
            submit_btn = gr.Button("λͺ¨λΈ 처리 및 μ• λ‹ˆλ©”μ΄μ…˜ 생성")
            
        with gr.Column():
            # 좜λ ₯ μ»΄ν¬λ„ŒνŠΈ
            output_3d = gr.Model3D(label="μ• λ‹ˆλ©”μ΄μ…˜ 적용된 3D λͺ¨λΈ")
            output_gif = gr.Image(label="μ• λ‹ˆλ©”μ΄μ…˜ 미리보기 (GIF)")
            output_json = gr.File(label="메타데이터 파일 λ‹€μš΄λ‘œλ“œ")
    
    # μ• λ‹ˆλ©”μ΄μ…˜ μœ ν˜• μ„€λͺ…
    gr.Markdown("""
    ### μ• λ‹ˆλ©”μ΄μ…˜ μœ ν˜• μ„€λͺ…
    - **νšŒμ „(rotate)**: λͺ¨λΈμ΄ Y좕을 μ€‘μ‹¬μœΌλ‘œ νšŒμ „ν•©λ‹ˆλ‹€.
    - **λΆ€μœ (float)**: λͺ¨λΈμ΄ μœ„μ•„λž˜λ‘œ λΆ€λ“œλŸ½κ²Œ λ– λ‹€λ‹™λ‹ˆλ‹€.
    - **폭발(explode)**: λͺ¨λΈμ˜ 각 뢀뢄이 μ€‘μ‹¬μ—μ„œ λ°”κΉ₯μͺ½μœΌλ‘œ νΌμ Έλ‚˜κ°‘λ‹ˆλ‹€.
    - **쑰립(assemble)**: 폭발 μ• λ‹ˆλ©”μ΄μ…˜μ˜ λ°˜λŒ€ - λΆ€ν’ˆλ“€μ΄ ν•¨κ»˜ λͺ¨μž…λ‹ˆλ‹€.
    - **νŽ„μŠ€(pulse)**: λͺ¨λΈμ΄ 크기가 μ»€μ‘Œλ‹€ μž‘μ•„μ‘Œλ‹€λ₯Ό λ°˜λ³΅ν•©λ‹ˆλ‹€.
    - **μŠ€μœ™(swing)**: λͺ¨λΈμ΄ 쒌우둜 λΆ€λ“œλŸ½κ²Œ ν”λ“€λ¦½λ‹ˆλ‹€.

    ### 팁
    - μ• λ‹ˆλ©”μ΄μ…˜ 길이와 FPSλ₯Ό μ‘°μ ˆν•˜μ—¬ μ›€μ§μž„μ˜ 속도와 λΆ€λ“œλŸ¬μ›€μ„ μ‘°μ ˆν•  수 μžˆμŠ΅λ‹ˆλ‹€.
    - λ³΅μž‘ν•œ λͺ¨λΈμ€ 처리 μ‹œκ°„μ΄ 더 였래 걸릴 수 μžˆμŠ΅λ‹ˆλ‹€.
    - GIF λ―Έλ¦¬λ³΄κΈ°λŠ” λΉ λ₯Έ 참쑰용이며, κ³ ν’ˆμ§ˆ κ²°κ³Όλ₯Ό μœ„ν•΄μ„œλŠ” μ• λ‹ˆλ©”μ΄μ…˜λœ GLB νŒŒμΌμ„ λ‹€μš΄λ‘œλ“œν•˜μ„Έμš”.
    """)
    
    # λ²„νŠΌ λ™μž‘ μ„€μ •
    submit_btn.click(
        fn=process_3d_model,
        inputs=[input_3d, animation_type, animation_duration, fps],
        outputs=[output_3d, output_gif, output_json]
    )
    
    # 예제 μ€€λΉ„
    example_files = [[f] for f in glob.glob('./data/demo_glb/*.glb')]
    if example_files:
        gr.Examples(
            examples=example_files,
            inputs=[input_3d],
            examples_per_page=10,
        )

# μ•± μ‹€ν–‰
if __name__ == "__main__":
    demo.launch(server_name="0.0.0.0", server_port=7860)