app.py

from flask import Flask, render_template, request, jsonify
import requests
import os
import time
import random
from collections import Counter

app = Flask(__name__)

# Generate dummy spaces in case of error
def generate_dummy_spaces(count):
    """
    API 호출 실패 시 예시용 더미 스페이스 생성
    """
    spaces = []
    for i in range(count):
        spaces.append({
            'id': f'dummy/space-{i}',
            'owner': 'dummy',
            'title': f'Example Space {i+1}',
            'description': 'Dummy space for fallback',
            'likes': 100 - i,
            'createdAt': '2023-01-01T00:00:00.000Z',
            'hardware': 'cpu',
            'user': {
                'avatar_url': 'https://huggingface.co/front/thumbnails/huggingface/default-avatar.svg',
                'name': 'dummyUser'
            }
        })
    return spaces

# Function to fetch Zero-GPU (CPU-based) Spaces from Huggingface with pagination
def fetch_trending_spaces(offset=0, limit=72):
    """
    hardware=cpu 파라미터를 추가하여
    GPU가 없는(=CPU 전용) 스페이스만 필터링
    """
    try:
        url = "https://huggingface.co/api/spaces"
        params = {
            "limit": 10000,  # 더 많이 가져오기
            "hardware": "cpu"  # <-- Zero GPU(=CPU) 필터 적용
        }
        response = requests.get(url, params=params, timeout=30)

        if response.status_code == 200:
            spaces = response.json()

            # owner나 id가 'None'인 경우 제외
            filtered_spaces = [
                space for space in spaces
                if space.get('owner') != 'None'
                   and space.get('id', '').split('/', 1)[0] != 'None'
            ]

            # 전체 목록에 대해 "글로벌 랭크"를 매긴다 (1부터 시작)
            for i, sp in enumerate(filtered_spaces):
                sp['global_rank'] = i + 1

            # Slice according to requested offset and limit
            start = min(offset, len(filtered_spaces))
            end = min(offset + limit, len(filtered_spaces))

            print(f"[fetch_trending_spaces] CPU기반 스페이스 총 {len(filtered_spaces)}개, "
                  f"요청 구간 {start}~{end-1} 반환")

            return {
                'spaces': filtered_spaces[start:end],
                'total': len(filtered_spaces),
                'offset': offset,
                'limit': limit,
                'all_spaces': filtered_spaces  # 통계 산출용
            }
        else:
            print(f"Error fetching spaces: {response.status_code}")
            # 실패 시 더미 데이터 생성
            return {
                'spaces': generate_dummy_spaces(limit),
                'total': 200,
                'offset': offset,
                'limit': limit,
                'all_spaces': generate_dummy_spaces(500)
            }

    except Exception as e:
        print(f"Exception when fetching spaces: {e}")
        # 실패 시 더미 데이터 생성
        return {
            'spaces': generate_dummy_spaces(limit),
            'total': 200,
            'offset': offset,
            'limit': limit,
            'all_spaces': generate_dummy_spaces(500)
        }

# Transform Huggingface URL to direct space URL
def transform_url(owner, name):
    """
    Hugging Face Space -> 서브도메인 접근 URL
    예) huggingface.co/spaces/owner/spaceName -> owner-spacename.hf.space
    """
    # 1. Replace '.' with '-'
    name = name.replace('.', '-')
    # 2. Replace '_' with '-'
    name = name.replace('_', '-')
    # 3. Convert to lowercase
    owner = owner.lower()
    name = name.lower()

    return f"https://{owner}-{name}.hf.space"

# Get space details
def get_space_details(space_data, index, offset):
    """
    - description, avatar_url, author_name 등 추가 필드를 추출
    - rank는 현재 페이지 내 offset 기반으로 계산
      (단, Top 500 계산은 global_rank 사용)
    """
    try:
        if '/' in space_data.get('id', ''):
            owner, name = space_data.get('id', '').split('/', 1)
        else:
            owner = space_data.get('owner', '')
            name = space_data.get('id', '')

        # Ignore if contains None
        if owner == 'None' or name == 'None':
            return None

        # Construct URLs
        original_url = f"https://huggingface.co/spaces/{owner}/{name}"
        embed_url = transform_url(owner, name)

        # Likes count
        likes_count = space_data.get('likes', 0)

        # Title
        title = space_data.get('title') or name

        # Description
        short_desc = space_data.get('description', '')

        # User info (avatar, name)
        user_info = space_data.get('user', {})
        avatar_url = user_info.get('avatar_url', '')
        author_name = user_info.get('name') or owner

        return {
            'url': original_url,
            'embedUrl': embed_url,
            'title': title,
            'owner': owner,
            'name': name,
            'likes_count': likes_count,
            'description': short_desc,
            'avatar_url': avatar_url,
            'author_name': author_name,
            'rank': offset + index + 1  # 현재 페이지에서의 표시용 랭크
        }
    except Exception as e:
        print(f"Error processing space data: {e}")
        # Return basic object even if error occurs
        return {
            'url': 'https://huggingface.co/spaces',
            'embedUrl': 'https://huggingface.co/spaces',
            'title': 'Error Loading Space',
            'owner': 'huggingface',
            'name': 'error',
            'likes_count': 0,
            'description': '',
            'avatar_url': '',
            'author_name': 'huggingface',
            'rank': offset + index + 1
        }

# Get owner statistics from all spaces
def get_owner_stats(all_spaces):
    """
    상위 500위(global_rank <= 500) 이내에 배치된 스페이스들의 owner를 추출해,
    각 owner가 몇 번 등장했는지 센 뒤 상위 30명만 반환
    """
    # Top 500
    top_500 = [s for s in all_spaces if s.get('global_rank', 999999) <= 500]

    owners = []
    for space in top_500:
        if '/' in space.get('id', ''):
            owner, _ = space.get('id', '').split('/', 1)
        else:
            owner = space.get('owner', '')
        if owner and owner != 'None':
            owners.append(owner)

    # Count occurrences of each owner in top 500
    owner_counts = Counter(owners)

    # Get top 30 owners by count
    top_owners = owner_counts.most_common(30)
    return top_owners

# Homepage route
@app.route('/')
def home():
    """
    index.html 템플릿 렌더링 (메인 페이지)
    """
    return render_template('index.html')

# Zero-GPU spaces API
@app.route('/api/trending-spaces', methods=['GET'])
def trending_spaces():
    """
    hardware=cpu 스페이스 목록을 불러와 검색, 페이징, 통계 등을 적용
    """
    search_query = request.args.get('search', '').lower()
    offset = int(request.args.get('offset', 0))
    limit = int(request.args.get('limit', 72))  # Default 72

    # Fetch zero-gpu (cpu) spaces
    spaces_data = fetch_trending_spaces(offset, limit)

    # Process and filter spaces
    results = []
    for index, space_data in enumerate(spaces_data['spaces']):
        space_info = get_space_details(space_data, index, offset)
        if not space_info:
            continue

        # Apply search filter if needed
        if search_query:
            if (search_query not in space_info['title'].lower()
                and search_query not in space_info['owner'].lower()
                and search_query not in space_info['url'].lower()
                and search_query not in space_info['description'].lower()):
                continue

        results.append(space_info)

    # Get owner statistics (Top 500 → Top 30)
    top_owners = get_owner_stats(spaces_data.get('all_spaces', []))

    return jsonify({
        'spaces': results,
        'total': spaces_data['total'],
        'offset': offset,
        'limit': limit,
        'top_owners': top_owners
    })

if __name__ == '__main__':
    """
    서버 구동 시, templates/index.html 파일을 생성 후 Flask 실행
    """
    # Create templates folder if not exists
    os.makedirs('templates', exist_ok=True)

    # index.html 전체를 새로 작성
    with open('templates/index.html', 'w', encoding='utf-8') as f:
        f.write('''<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Huggingface Zero-GPU Spaces</title>
  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
  <style>
    /* Google Fonts & Base Styling */
    @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300;400;500;600;700&display=swap');
    
    :root {
      --pastel-pink: #FFD6E0;
      --pastel-blue: #C5E8FF;
      --pastel-purple: #E0C3FC;
      --pastel-yellow: #FFF2CC;
      --pastel-green: #C7F5D9;
      --pastel-orange: #FFE0C3;
      
      --mac-window-bg: rgba(250, 250, 250, 0.85);
      --mac-toolbar: #F5F5F7;
      --mac-border: #E2E2E2;
      --mac-button-red: #FF5F56;
      --mac-button-yellow: #FFBD2E;
      --mac-button-green: #27C93F;
      
      --text-primary: #333;
      --text-secondary: #666;
      --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
      line-height: 1.6;
      color: var(--text-primary);
      background-color: #f8f9fa;
      background-image: linear-gradient(135deg, var(--pastel-blue) 0%, var(--pastel-purple) 100%);
      min-height: 100vh;
      padding: 2rem;
    }
    
    .container {
      max-width: 1600px;
      margin: 0 auto;
    }
    
    /* Mac OS Window Styling */
    .mac-window {
      background-color: var(--mac-window-bg);
      border-radius: 10px;
      box-shadow: var(--box-shadow);
      backdrop-filter: blur(10px);
      overflow: hidden;
      margin-bottom: 2rem;
      border: 1px solid var(--mac-border);
    }
    
    .mac-toolbar {
      display: flex;
      align-items: center;
      padding: 10px 15px;
      background-color: var(--mac-toolbar);
      border-bottom: 1px solid var(--mac-border);
    }
    
    .mac-buttons {
      display: flex;
      gap: 8px;
      margin-right: 15px;
    }
    
    .mac-button {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      cursor: default;
    }
    
    .mac-close {
      background-color: var(--mac-button-red);
    }
    
    .mac-minimize {
      background-color: var(--mac-button-yellow);
    }
    
    .mac-maximize {
      background-color: var(--mac-button-green);
    }
    
    .mac-title {
      flex-grow: 1;
      text-align: center;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }
    
    .mac-content {
      padding: 20px;
    }
    
    /* Header Styling */
    .header {
      text-align: center;
      margin-bottom: 1.5rem;
      position: relative;
    }
    
    .header h1 {
      font-size: 2.2rem;
      font-weight: 700;
      margin: 0;
      color: #2d3748;
      letter-spacing: -0.5px;
    }
    
    .header p {
      color: var(--text-secondary);
      margin-top: 0.5rem;
      font-size: 1.1rem;
    }
    
    /* Tabs Styling */
    .tab-nav {
      display: flex;
      justify-content: center;
      margin-bottom: 1.5rem;
    }
    
    .tab-button {
      border: none;
      background-color: #edf2f7;
      color: var(--text-primary);
      padding: 10px 20px;
      margin: 0 5px;
      cursor: pointer;
      border-radius: 5px;
      font-size: 1rem;
      font-weight: 600;
    }
    
    .tab-button.active {
      background-color: var(--pastel-purple);
      color: #fff;
    }
    
    .tab-content {
      display: none;
    }
    
    .tab-content.active {
      display: block;
    }
    
    /* Controls Styling */
    .search-bar {
      display: flex;
      align-items: center;
      margin-bottom: 1.5rem;
      background-color: white;
      border-radius: 30px;
      padding: 5px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    
    .search-bar input {
      flex-grow: 1;
      border: none;
      padding: 12px 20px;
      font-size: 1rem;
      outline: none;
      background: transparent;
      border-radius: 30px;
    }
    
    .search-bar .refresh-btn {
      background-color: var(--pastel-green);
      color: #1a202c;
      border: none;
      border-radius: 30px;
      padding: 10px 20px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .search-bar .refresh-btn:hover {
      background-color: #9ee7c0;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
    
    .refresh-icon {
      display: inline-block;
      width: 16px;
      height: 16px;
      border: 2px solid #1a202c;
      border-top-color: transparent;
      border-radius: 50%;
      animation: none;
    }
    
    .refreshing .refresh-icon {
      animation: spin 1s linear infinite;
    }
    
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }
    
    /* Grid Styling */
    .grid-container {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 1.5rem;
      margin-bottom: 2rem;
    }
    
    .grid-item {
      height: 500px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
      border-radius: 15px;
    }
    
    .grid-item:nth-child(6n+1) { background-color: var(--pastel-pink); }
    .grid-item:nth-child(6n+2) { background-color: var(--pastel-blue); }
    .grid-item:nth-child(6n+3) { background-color: var(--pastel-purple); }
    .grid-item:nth-child(6n+4) { background-color: var(--pastel-yellow); }
    .grid-item:nth-child(6n+5) { background-color: var(--pastel-green); }
    .grid-item:nth-child(6n+6) { background-color: var(--pastel-orange); }
    
    .grid-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    }
    
    .grid-header {
      padding: 15px;
      display: flex;
      flex-direction: column;
      background-color: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(5px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .grid-header-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
    }
    
    .rank-badge {
      background-color: #1a202c;
      color: white;
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 8px;
      border-radius: 50px;
      display: inline-block;
    }
    
    .grid-header h3 {
      margin: 0;
      font-size: 1.2rem;
      font-weight: 700;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    
    .grid-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.9rem;
    }
    
    .owner-info {
      color: var(--text-secondary);
      font-weight: 500;
    }
    
    .likes-counter {
      display: flex;
      align-items: center;
      color: #e53e3e;
      font-weight: 600;
    }
    
    .likes-counter span {
      margin-left: 4px;
    }
    
    .grid-actions {
      padding: 10px 15px;
      text-align: right;
      background-color: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(5px);
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 10;
      display: flex;
      justify-content: flex-end;
    }
    
    .open-link {
      text-decoration: none;
      color: #2c5282;
      font-weight: 600;
      padding: 5px 10px;
      border-radius: 5px;
      transition: all 0.2s;
      background-color: rgba(237, 242, 247, 0.8);
    }
    
    .open-link:hover {
      background-color: #e2e8f0;
    }
    
    .grid-content {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      padding-top: 85px; /* Header height */
      padding-bottom: 45px; /* Actions height */
    }
    
    .iframe-container {
      width: 100%;
      height: 100%;
      overflow: hidden;
      position: relative;
    }
    
    /* Apply 70% scaling to iframes */
    .grid-content iframe {
      transform: scale(0.7);
      transform-origin: top left;
      width: 142.857%;
      height: 142.857%;
      border: none;
      border-radius: 0;
    }
    
    .error-placeholder {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      padding: 20px;
      background-color: rgba(255, 255, 255, 0.9);
      text-align: center;
    }
    
    .error-emoji {
      font-size: 6rem;
      margin-bottom: 1.5rem;
      animation: bounce 1s infinite alternate;
      text-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    
    @keyframes bounce {
      from {
        transform: translateY(0px) scale(1);
      }
      to {
        transform: translateY(-15px) scale(1.1);
      }
    }
    
    /* Pagination Styling */
    .pagination {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 10px;
      margin: 2rem 0;
    }
    
    .pagination-button {
      background-color: white;
      border: none;
      padding: 10px 20px;
      border-radius: 10px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
      color: var(--text-primary);
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }
    
    .pagination-button:hover {
      background-color: #f8f9fa;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }
    
    .pagination-button.active {
      background-color: var(--pastel-purple);
      color: #4a5568;
    }
    
    .pagination-button:disabled {
      background-color: #edf2f7;
      color: #a0aec0;
      cursor: default;
      box-shadow: none;
    }
    
    /* Loading Indicator */
    .loading {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(5px);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
    }
    
    .loading-content {
      text-align: center;
    }
    
    .loading-spinner {
      width: 60px;
      height: 60px;
      border: 5px solid #e2e8f0;
      border-top-color: var(--pastel-purple);
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin: 0 auto 15px;
    }
    
    .loading-text {
      font-size: 1.2rem;
      font-weight: 600;
      color: #4a5568;
    }
    
    .loading-error {
      display: none;
      margin-top: 10px;
      color: #e53e3e;
      font-size: 0.9rem;
    }
    
    /* Stats window styling */
    .stats-window {
      margin-top: 2rem;
      margin-bottom: 2rem;
    }
    
    .stats-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1rem;
    }
    
    .stats-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: #2d3748;
    }
    
    .stats-toggle {
      background-color: var(--pastel-blue);
      border: none;
      padding: 8px 16px;
      border-radius: 20px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
    }
    
    .stats-toggle:hover {
      background-color: var(--pastel-purple);
    }
    
    .stats-content {
      background-color: white;
      border-radius: 10px;
      padding: 20px;
      box-shadow: var(--box-shadow);
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.5s ease-out;
    }
    
    .stats-content.open {
      max-height: 600px;
    }
    
    .chart-container {
      width: 100%;
      height: 500px;
    }
    
    /* Responsive Design */
    @media (max-width: 768px) {
      body {
        padding: 1rem;
      }
      
      .grid-container {
        grid-template-columns: 1fr;
      }
      
      .search-bar {
        flex-direction: column;
        padding: 10px;
      }
      
      .search-bar input {
        width: 100%;
        margin-bottom: 10px;
      }
      
      .search-bar .refresh-btn {
        width: 100%;
        justify-content: center;
      }
      
      .pagination {
        flex-wrap: wrap;
      }
      
      .chart-container {
        height: 300px;
      }
    }
    
    .error-emoji-detector { 
      position: fixed; 
      top: -9999px; 
      left: -9999px;
      z-index: -1; 
      opacity: 0;
    }

    /* 추가 레이아웃 수정(아바타, ZERO GPU 뱃지 등)을 위해 
       아래 클래스들을 일부 추가/수정해도 좋지만 
       예시는 위 영역에서 이미 충분히 처리하므로 생략 */
    
    /* 다음 부분은 Zero GPU Spaces용 카드 구조에서 활용 */
    .space-header {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 4px;
    }
    .avatar-img {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      object-fit: cover;
      border: 1px solid #ccc;
    }
    .space-title {
      font-size: 1rem;
      font-weight: 600;
      margin: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      max-width: 200px;
    }
    .zero-gpu-badge {
      font-size: 0.7rem;
      background-color: #e6fffa;
      color: #319795;
      border: 1px solid #81e6d9;
      border-radius: 6px;
      padding: 2px 6px;
      font-weight: 600;
      margin-left: 8px;
    }
    .desc-text {
      font-size: 0.85rem;
      color: #444;
      margin: 4px 0;
      line-clamp: 2;
      display: -webkit-box;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .author-name {
      font-size: 0.8rem;
      color: #666;
    }
    .likes-wrapper {
      display: flex;
      align-items: center;
      gap: 4px;
      color: #e53e3e;
      font-weight: bold;
      font-size: 0.85rem;
    }
    .likes-heart {
      font-size: 1rem;
      line-height: 1rem;
      color: #f56565;
    }
    /* 이모지 전용 스타일 (선택사항) */
    .emoji-avatar {
      font-size: 1.2rem;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid #ccc;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  </style>
</head>
<body>
  <div class="container">
    <div class="mac-window">
      <div class="mac-toolbar">
        <div class="mac-buttons">
          <div class="mac-button mac-close"></div>
          <div class="mac-button mac-minimize"></div>
          <div class="mac-button mac-maximize"></div>
        </div>
        <div class="mac-title">Huggingface Explorer</div>
      </div>
      
      <div class="mac-content">
        <div class="header">
          <!-- 첫 번째 탭 제목을 Zero GPU Spaces로 변경 -->
          <h1>ZeroGPU Spaces Leaderboard</h1>
          <p>Discover Zero GPU(Shared A100) spaces from Hugging Face</p>
        </div>
        
        <!-- Tab Navigation -->
        <div class="tab-nav">
          <button id="tabTrendingButton" class="tab-button active">Trending</button>
          <button id="tabFixedButton" class="tab-button">Picks</button>
        </div>
        
        <!-- Trending(Zero GPU) Tab Content -->
        <div id="trendingTab" class="tab-content active">
          <div class="stats-window mac-window">
            <div class="mac-toolbar">
              <div class="mac-buttons">
                <div class="mac-button mac-close"></div>
                <div class="mac-button mac-minimize"></div>
                <div class="mac-button mac-maximize"></div>
              </div>
              <div class="mac-title">Creator Statistics</div>
            </div>
            <div class="mac-content">
              <div class="stats-header">
                <div class="stats-title">Top 30 Creators by Count in Top 500</div>
                <button id="statsToggle" class="stats-toggle">Show Stats</button>
              </div>
              <div id="statsContent" class="stats-content">
                <div class="chart-container">
                  <canvas id="creatorStatsChart"></canvas>
                </div>
              </div>
            </div>
          </div>
          
          <div class="search-bar">
            <input type="text" id="searchInput" placeholder="Search by name, owner, or description..." />
            <button id="refreshButton" class="refresh-btn">
              <span class="refresh-icon"></span>
              Refresh
            </button>
          </div>
          
          <div id="gridContainer" class="grid-container"></div>
          
          <div id="pagination" class="pagination"></div>
        </div>
        
        <!-- Fixed Tab Content (기존 예시 유지) -->
        <div id="fixedTab" class="tab-content">
          <div id="fixedGrid" class="grid-container"></div>
        </div>
      </div>
    </div>
  </div>
  
  <div id="loadingIndicator" class="loading">
    <div class="loading-content">
      <div class="loading-spinner"></div>
      <div class="loading-text">Loading Zero-GPU spaces...</div>
      <div id="loadingError" class="loading-error">
        If this takes too long, try refreshing the page.
      </div>
    </div>
  </div>
  
  <script>
    // DOM Elements
    const elements = {
      gridContainer: document.getElementById('gridContainer'),
      loadingIndicator: document.getElementById('loadingIndicator'),
      loadingError: document.getElementById('loadingError'),
      searchInput: document.getElementById('searchInput'),
      refreshButton: document.getElementById('refreshButton'),
      pagination: document.getElementById('pagination'),
      statsToggle: document.getElementById('statsToggle'),
      statsContent: document.getElementById('statsContent'),
      creatorStatsChart: document.getElementById('creatorStatsChart')
    };
    
    const tabTrendingButton = document.getElementById('tabTrendingButton');
    const tabFixedButton = document.getElementById('tabFixedButton');
    const trendingTab = document.getElementById('trendingTab');
    const fixedTab = document.getElementById('fixedTab');
    const fixedGridContainer = document.getElementById('fixedGrid');

    const state = {
      isLoading: false,
      spaces: [],
      currentPage: 0,
      itemsPerPage: 72,
      totalItems: 0,
      loadingTimeout: null,
      staticModeAttempted: {},
      statsVisible: false,
      chartInstance: null,
      topOwners: [],
      iframeStatuses: {}
    };

    // Advanced iframe loader for better error detection
    const iframeLoader = {
      checkQueue: {},
      maxAttempts: 5,
      checkInterval: 5000,
      
      startChecking: function(iframe, owner, name, title, spaceKey) {
        this.checkQueue[spaceKey] = {
          iframe: iframe,
          owner: owner,
          name: name,
          title: title,
          attempts: 0,
          status: 'loading'
        };
        this.checkIframeStatus(spaceKey);
      },
      
      checkIframeStatus: function(spaceKey) {
        if (!this.checkQueue[spaceKey]) return;
        
        const item = this.checkQueue[spaceKey];
        if (item.status !== 'loading') {
          delete this.checkQueue[spaceKey];
          return;
        }
        item.attempts++;
        
        try {
          if (!item.iframe || !item.iframe.parentNode) {
            delete this.checkQueue[spaceKey];
            return;
          }

          // Check if content loaded
          try {
            const hasContent = item.iframe.contentWindow && 
                               item.iframe.contentWindow.document && 
                               item.iframe.contentWindow.document.body;
            if (hasContent && item.iframe.contentWindow.document.body.innerHTML.length > 100) {
              const bodyText = item.iframe.contentWindow.document.body.textContent.toLowerCase();
              if (bodyText.includes('forbidden') || bodyText.includes('404') ||
                  bodyText.includes('not found') || bodyText.includes('error')) {
                item.status = 'error';
                handleIframeError(item.iframe, item.owner, item.name, item.title);
              } else {
                item.status = 'success';
              }
              delete this.checkQueue[spaceKey];
              return;
            }
          } catch(e) {
            // Cross-origin issues can happen; not always an error
          }

          // Check if iframe is visible
          const rect = item.iframe.getBoundingClientRect();
          if (rect.width > 50 && rect.height > 50 && item.attempts > 2) {
            item.status = 'success';
            delete this.checkQueue[spaceKey];
            return;
          }

          // If max attempts reached
          if (item.attempts >= this.maxAttempts) {
            if (item.iframe.offsetWidth > 0 && item.iframe.offsetHeight > 0) {
              item.status = 'success';
            } else {
              item.status = 'error';
              handleIframeError(item.iframe, item.owner, item.name, item.title);
            }
            delete this.checkQueue[spaceKey];
            return;
          }

          // Re-check after some delay
          const nextDelay = this.checkInterval * Math.pow(1.5, item.attempts - 1);
          setTimeout(() => this.checkIframeStatus(spaceKey), nextDelay);

        } catch (e) {
          console.error('Error checking iframe status:', e);
          if (item.attempts >= this.maxAttempts) {
            item.status = 'error';
            handleIframeError(item.iframe, item.owner, item.name, item.title);
            delete this.checkQueue[spaceKey];
          } else {
            setTimeout(() => this.checkIframeStatus(spaceKey), this.checkInterval);
          }
        }
      }
    };

    function toggleStats() {
      state.statsVisible = !state.statsVisible;
      elements.statsContent.classList.toggle('open', state.statsVisible);
      elements.statsToggle.textContent = state.statsVisible ? 'Hide Stats' : 'Show Stats';
      
      if (state.statsVisible && state.topOwners.length > 0) {
        renderCreatorStats();
      }
    }

    function renderCreatorStats() {
      if (state.chartInstance) {
        state.chartInstance.destroy();
      }
      const ctx = elements.creatorStatsChart.getContext('2d');
      const labels = state.topOwners.map(item => item[0]);
      const data = state.topOwners.map(item => item[1]);

      const colors = [];
      for (let i = 0; i < labels.length; i++) {
        const hue = (i * 360 / labels.length) % 360;
        colors.push(`hsla(${hue}, 70%, 80%, 0.7)`);
      }

      state.chartInstance = new Chart(ctx, {
        type: 'bar',
        data: {
          labels: labels,
          datasets: [{
            label: 'Number of Spaces in Top 500',
            data: data,
            backgroundColor: colors,
            borderColor: colors.map(color => color.replace('0.7', '1')),
            borderWidth: 1
          }]
        },
        options: {
          indexAxis: 'y',
          responsive: true,
          maintainAspectRatio: false,
          plugins: {
            legend: { display: false },
            tooltip: {
              callbacks: {
                title: function(tooltipItems) {
                  return tooltipItems[0].label;
                },
                label: function(context) {
                  return `Spaces: ${context.raw}`;
                }
              }
            }
          },
          scales: {
            x: {
              beginAtZero: true,
              title: {
                display: true,
                text: 'Number of Spaces'
              }
            },
            y: {
              title: {
                display: true,
                text: 'Creator ID'
              },
              ticks: {
                autoSkip: false,
                font: function(context) {
                  const defaultSize = 11;
                  return {
                    size: labels.length > 20 ? defaultSize - 1 : defaultSize
                  };
                }
              }
            }
          }
        }
      });
    }

    async function loadSpaces(page = 0) {
      setLoading(true);
      try {
        const searchText = elements.searchInput.value;
        const offset = page * state.itemsPerPage;

        const timeoutPromise = new Promise((_, reject) =>
          setTimeout(() => reject(new Error('Request timeout')), 30000)
        );
        const fetchPromise = fetch(
          `/api/trending-spaces?search=${encodeURIComponent(searchText)}&offset=${offset}&limit=${state.itemsPerPage}`
        );
        const response = await Promise.race([fetchPromise, timeoutPromise]);
        const data = await response.json();

        state.spaces = data.spaces;
        state.totalItems = data.total;
        state.currentPage = page;
        state.topOwners = data.top_owners || [];

        renderGrid(state.spaces);
        renderPagination();

        if (state.statsVisible && state.topOwners.length > 0) {
          renderCreatorStats();
        }
      } catch (error) {
        console.error('Error loading spaces:', error);
        elements.gridContainer.innerHTML = `
          <div style="grid-column: 1/-1; text-align: center; padding: 40px;">
            <div style="font-size: 3rem; margin-bottom: 20px;">⚠️</div>
            <h3 style="margin-bottom: 10px;">Unable to load spaces</h3>
            <p style="color: #666;">Please try refreshing the page. If the problem persists, try again later.</p>
            <button id="retryButton" style="margin-top: 20px; padding: 10px 20px; background: var(--pastel-purple); border: none; border-radius: 5px; cursor: pointer;">
              Try Again
            </button>
          </div>
        `;
        document.getElementById('retryButton')?.addEventListener('click', () => loadSpaces(0));
        renderPagination();
      } finally {
        setLoading(false);
      }
    }

    function renderPagination() {
      elements.pagination.innerHTML = '';
      const totalPages = Math.ceil(state.totalItems / state.itemsPerPage);

      // Previous page
      const prevButton = document.createElement('button');
      prevButton.className = 'pagination-button';
      prevButton.textContent = 'Previous';
      prevButton.disabled = (state.currentPage === 0);
      prevButton.addEventListener('click', () => {
        if (state.currentPage > 0) {
          loadSpaces(state.currentPage - 1);
        }
      });
      elements.pagination.appendChild(prevButton);

      const maxButtons = 7;
      let startPage = Math.max(0, state.currentPage - Math.floor(maxButtons / 2));
      let endPage = Math.min(totalPages - 1, startPage + maxButtons - 1);

      if (endPage - startPage + 1 < maxButtons) {
        startPage = Math.max(0, endPage - maxButtons + 1);
      }

      for (let i = startPage; i <= endPage; i++) {
        const pageButton = document.createElement('button');
        pageButton.className = 'pagination-button' + (i === state.currentPage ? ' active' : '');
        pageButton.textContent = (i + 1);
        pageButton.addEventListener('click', () => {
          if (i !== state.currentPage) {
            loadSpaces(i);
          }
        });
        elements.pagination.appendChild(pageButton);
      }

      // Next page
      const nextButton = document.createElement('button');
      nextButton.className = 'pagination-button';
      nextButton.textContent = 'Next';
      nextButton.disabled = (state.currentPage >= totalPages - 1);
      nextButton.addEventListener('click', () => {
        if (state.currentPage < totalPages - 1) {
          loadSpaces(state.currentPage + 1);
        }
      });
      elements.pagination.appendChild(nextButton);
    }

    function handleIframeError(iframe, owner, name, title) {
      const container = iframe.parentNode;
      
      const errorPlaceholder = document.createElement('div');
      errorPlaceholder.className = 'error-placeholder';
      
      const errorMessage = document.createElement('p');
      errorMessage.textContent = `"${title}" space couldn't be loaded`;
      errorPlaceholder.appendChild(errorMessage);
      
      const directLink = document.createElement('a');
      directLink.href = `https://huggingface.co/spaces/${owner}/${name}`;
      directLink.target = '_blank';
      directLink.textContent = 'Visit HF Space';
      directLink.style.color = '#3182ce';
      directLink.style.marginTop = '10px';
      directLink.style.display = 'inline-block';
      directLink.style.padding = '8px 16px';
      directLink.style.background = '#ebf8ff';
      directLink.style.borderRadius = '5px';
      directLink.style.fontWeight = '600';
      errorPlaceholder.appendChild(directLink);
      
      iframe.style.display = 'none';
      container.appendChild(errorPlaceholder);
    }

    function renderGrid(spaces) {
      elements.gridContainer.innerHTML = '';
      
      if (!spaces || spaces.length === 0) {
        const noResultsMsg = document.createElement('p');
        noResultsMsg.textContent = 'No zero-gpu spaces found matching your search.';
        noResultsMsg.style.padding = '2rem';
        noResultsMsg.style.textAlign = 'center';
        noResultsMsg.style.fontStyle = 'italic';
        noResultsMsg.style.color = '#718096';
        elements.gridContainer.appendChild(noResultsMsg);
        return;
      }

      spaces.forEach((item) => {
        try {
          const {
            url, title, likes_count, owner, name, rank,
            description, avatar_url, author_name, embedUrl
          } = item;

          const gridItem = document.createElement('div');
          gridItem.className = 'grid-item';

          // 상단 헤더
          const headerDiv = document.createElement('div');
          headerDiv.className = 'grid-header';

          // space-header (순위 + 제목 + Zero GPU 배지)
          const spaceHeader = document.createElement('div');
          spaceHeader.className = 'space-header';

          // 순위 배지
          const rankBadge = document.createElement('div');
          rankBadge.className = 'rank-badge';
          rankBadge.textContent = `#${rank}`;
          spaceHeader.appendChild(rankBadge);

          // 제목+배지
          const titleWrapper = document.createElement('div');
          titleWrapper.style.display = 'flex';
          titleWrapper.style.alignItems = 'center';
          titleWrapper.style.marginLeft = '8px';

          const titleEl = document.createElement('h3');
          titleEl.className = 'space-title';
          titleEl.textContent = title;
          titleEl.title = title;
          titleWrapper.appendChild(titleEl);

          const zeroGpuBadge = document.createElement('span');
          zeroGpuBadge.className = 'zero-gpu-badge';
          zeroGpuBadge.textContent = 'ZERO GPU';
          titleWrapper.appendChild(zeroGpuBadge);

          spaceHeader.appendChild(titleWrapper);
          headerDiv.appendChild(spaceHeader);

          // rank + author + likes
          const metaInfo = document.createElement('div');
          metaInfo.className = 'grid-meta';
          metaInfo.style.display = 'flex';
          metaInfo.style.justifyContent = 'space-between';
          metaInfo.style.alignItems = 'center';
          metaInfo.style.marginTop = '6px';

          // 왼쪽: rank + author
          const leftMeta = document.createElement('div');

          const rankBadge2 = document.createElement('div');
          rankBadge2.className = 'rank-badge';
          rankBadge2.textContent = `#${rank}`;
          leftMeta.appendChild(rankBadge2);

          const authorSpan = document.createElement('span');
          authorSpan.className = 'author-name';
          authorSpan.style.marginLeft = '8px';
          authorSpan.textContent = `by ${author_name}`;
          leftMeta.appendChild(authorSpan);

          metaInfo.appendChild(leftMeta);

          // 오른쪽: likes
          const likesDiv = document.createElement('div');
          likesDiv.className = 'likes-wrapper';
          likesDiv.innerHTML = `<span class="likes-heart">♥</span><span>${likes_count}</span>`;
          metaInfo.appendChild(likesDiv);

          headerDiv.appendChild(metaInfo);
          gridItem.appendChild(headerDiv);

          // description
          if (description) {
            const descP = document.createElement('p');
            descP.className = 'desc-text';
            descP.textContent = description;
            gridItem.appendChild(descP);
          }

          // iframe container
          const content = document.createElement('div');
          content.className = 'grid-content';

          const iframeContainer = document.createElement('div');
          iframeContainer.className = 'iframe-container';

          const iframe = document.createElement('iframe');
          iframe.src = embedUrl;  // transformed direct URL
          iframe.title = title;
          iframe.allow = 'accelerometer; camera; encrypted-media; geolocation; gyroscope;';
          iframe.setAttribute('allowfullscreen', '');
          iframe.setAttribute('frameborder', '0');
          iframe.loading = 'lazy';

          const spaceKey = `${owner}/${name}`;
          state.iframeStatuses[spaceKey] = 'loading';

          iframe.onload = function() {
            iframeLoader.startChecking(iframe, owner, name, title, spaceKey);
          };
          iframe.onerror = function() {
            handleIframeError(iframe, owner, name, title);
            state.iframeStatuses[spaceKey] = 'error';
          };
          setTimeout(() => {
            if (state.iframeStatuses[spaceKey] === 'loading') {
              handleIframeError(iframe, owner, name, title);
              state.iframeStatuses[spaceKey] = 'error';
            }
          }, 30000);

          iframeContainer.appendChild(iframe);
          content.appendChild(iframeContainer);

          // actions
          const actions = document.createElement('div');
          actions.className = 'grid-actions';

          const linkEl = document.createElement('a');
          linkEl.href = url;
          linkEl.target = '_blank';
          linkEl.className = 'open-link';
          linkEl.textContent = 'Open in new window';

          actions.appendChild(linkEl);
          gridItem.appendChild(content);
          gridItem.appendChild(actions);

          elements.gridContainer.appendChild(gridItem);

        } catch (err) {
          console.error('Item rendering error:', err);
        }
      });
    }

    function renderFixedGrid() {
      // Fixed Tab 예시용 (원본 코드 예시 유지)
      fixedGridContainer.innerHTML = '';

      const staticSpaces = [
        {
          url: "https://huggingface.co/spaces/VIDraft/SanaSprint",
          title: "SanaSprint",
          likes_count: 0,
          owner: "VIDraft",
          name: "SanaSprint",
          rank: 1
        },
        {
          url: "https://huggingface.co/spaces/VIDraft/SanaSprint",
          title: "SanaSprint",
          likes_count: 0,
          owner: "VIDraft",
          name: "SanaSprint",
          rank: 2
        },
        {
          url: "https://huggingface.co/spaces/VIDraft/SanaSprint",
          title: "SanaSprint",
          likes_count: 0,
          owner: "VIDraft",
          name: "SanaSprint",
          rank: 3
        }
      ];

      if (!staticSpaces || staticSpaces.length === 0) {
        const noResultsMsg = document.createElement('p');
        noResultsMsg.textContent = 'No spaces to display.';
        noResultsMsg.style.padding = '2rem';
        noResultsMsg.style.textAlign = 'center';
        noResultsMsg.style.fontStyle = 'italic';
        noResultsMsg.style.color = '#718096';
        fixedGridContainer.appendChild(noResultsMsg);
        return;
      }

      staticSpaces.forEach((item) => {
        try {
          const { url, title, likes_count, owner, name, rank } = item;
          const gridItem = document.createElement('div');
          gridItem.className = 'grid-item';

          const header = document.createElement('div');
          header.className = 'grid-header';

          const headerTop = document.createElement('div');
          headerTop.className = 'grid-header-top';

          // 로봇 이모지 + 타이틀 함께 표시
          const leftWrapper = document.createElement('div');
          leftWrapper.style.display = 'flex';
          leftWrapper.style.alignItems = 'center';

          const emojiAvatar = document.createElement('div');
          emojiAvatar.className = 'emoji-avatar';
          emojiAvatar.textContent = '🤖';
          leftWrapper.appendChild(emojiAvatar);

          const titleEl = document.createElement('h3');
          titleEl.textContent = title;
          titleEl.title = title;
          leftWrapper.appendChild(titleEl);

          headerTop.appendChild(leftWrapper);

          const rankBadge = document.createElement('div');
          rankBadge.className = 'rank-badge';
          rankBadge.textContent = `#${rank}`;
          headerTop.appendChild(rankBadge);

          header.appendChild(headerTop);

          const metaInfo = document.createElement('div');
          metaInfo.className = 'grid-meta';

          const ownerEl = document.createElement('div');
          ownerEl.className = 'owner-info';
          ownerEl.textContent = `by ${owner}`;
          metaInfo.appendChild(ownerEl);

          const likesCounter = document.createElement('div');
          likesCounter.className = 'likes-counter';
          likesCounter.innerHTML = '♥ <span>' + likes_count + '</span>';
          metaInfo.appendChild(likesCounter);

          header.appendChild(metaInfo);
          gridItem.appendChild(header);

          const content = document.createElement('div');
          content.className = 'grid-content';

          const iframeContainer = document.createElement('div');
          iframeContainer.className = 'iframe-container';

          const iframe = document.createElement('iframe');
          iframe.src = "https://" + owner.toLowerCase() + "-" + name.toLowerCase() + ".hf.space";
          iframe.title = title;
          iframe.allow = 'accelerometer; camera; encrypted-media; geolocation; gyroscope;';
          iframe.setAttribute('allowfullscreen', '');
          iframe.setAttribute('frameborder', '0');
          iframe.loading = 'lazy';

          const spaceKey = `${owner}/${name}`;
          iframe.onload = function() {
            iframeLoader.startChecking(iframe, owner, name, title, spaceKey);
          };
          iframe.onerror = function() {
            handleIframeError(iframe, owner, name, title);
          };
          setTimeout(() => {
            if (iframe.offsetWidth === 0 || iframe.offsetHeight === 0) {
              handleIframeError(iframe, owner, name, title);
            }
          }, 30000);

          iframeContainer.appendChild(iframe);
          content.appendChild(iframeContainer);

          const actions = document.createElement('div');
          actions.className = 'grid-actions';

          const linkEl = document.createElement('a');
          linkEl.href = url;
          linkEl.target = '_blank';
          linkEl.className = 'open-link';
          linkEl.textContent = 'Open in new window';
          actions.appendChild(linkEl);

          gridItem.appendChild(content);
          gridItem.appendChild(actions);

          fixedGridContainer.appendChild(gridItem);

        } catch (error) {
          console.error('Fixed tab rendering error:', error);
        }
      });
    }

    // Tab switching
    tabTrendingButton.addEventListener('click', () => {
      tabTrendingButton.classList.add('active');
      tabFixedButton.classList.remove('active');
      trendingTab.classList.add('active');
      fixedTab.classList.remove('active');
      loadSpaces(state.currentPage);
    });
    tabFixedButton.addEventListener('click', () => {
      tabFixedButton.classList.add('active');
      tabTrendingButton.classList.remove('active');
      fixedTab.classList.add('active');
      trendingTab.classList.remove('active');
      renderFixedGrid();
    });

    elements.searchInput.addEventListener('input', () => {
      clearTimeout(state.searchTimeout);
      state.searchTimeout = setTimeout(() => loadSpaces(0), 300);
    });
    elements.searchInput.addEventListener('keyup', (event) => {
      if (event.key === 'Enter') {
        loadSpaces(0);
      }
    });
    elements.refreshButton.addEventListener('click', () => loadSpaces(0));
    elements.statsToggle.addEventListener('click', toggleStats);

    window.addEventListener('load', function() {
      setTimeout(() => loadSpaces(0), 500);
    });

    setTimeout(() => {
      if (state.isLoading) {
        setLoading(false);
        elements.gridContainer.innerHTML = `
          <div style="grid-column: 1/-1; text-align: center; padding: 40px;">
            <div style="font-size: 3rem; margin-bottom: 20px;">⏱️</div>
            <h3 style="margin-bottom: 10px;">Loading is taking longer than expected</h3>
            <p style="color: #666;">Please try refreshing the page.</p>
            <button onClick="window.location.reload()" style="margin-top: 20px; padding: 10px 20px; background: var(--pastel-purple); border: none; border-radius: 5px; cursor: pointer;">
              Reload Page
            </button>
          </div>
        `;
      }
    }, 20000);

    loadSpaces(0);

    function setLoading(isLoading) {
      state.isLoading = isLoading;
      elements.loadingIndicator.style.display = isLoading ? 'flex' : 'none';

      if (isLoading) {
        elements.refreshButton.classList.add('refreshing');
        clearTimeout(state.loadingTimeout);
        state.loadingTimeout = setTimeout(() => {
          elements.loadingError.style.display = 'block';
        }, 10000);
      } else {
        elements.refreshButton.classList.remove('refreshing');
        clearTimeout(state.loadingTimeout);
        elements.loadingError.style.display = 'none';
      }
    }
  </script>
</body>
</html>
''')

    # Flask 앱 실행 (포트 7860)
    app.run(host='0.0.0.0', port=7860)