# ConvertX-CN Nginx 反向代理配置範例
# 檔案位置：/etc/nginx/sites-available/convertx
#
# 使用方式：
# 1. 複製到 /etc/nginx/sites-available/convertx
# 2. 將 YOUR_DOMAIN_HERE 替換為你的網域
# 3. ln -s /etc/nginx/sites-available/convertx /etc/nginx/sites-enabled/
# 4. sudo nginx -t && sudo systemctl reload nginx
#
# 必須修改的欄位：
#   - YOUR_DOMAIN_HERE（共 5 處）

# HTTP → HTTPS 重導向
server {
    listen 80;
    listen [::]:80;
    server_name YOUR_DOMAIN_HERE;
    
    # Let's Encrypt 驗證
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    # 重導向到 HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

# HTTPS 伺服器
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name YOUR_DOMAIN_HERE;

    # SSL 憑證（Let's Encrypt）
    ssl_certificate /etc/letsencrypt/live/YOUR_DOMAIN_HERE/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/YOUR_DOMAIN_HERE/privkey.pem;
    
    # SSL 設定（安全強化）
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    # 安全 Headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-Content-Type-Options nosniff;
    add_header X-Frame-Options DENY;
    add_header X-XSS-Protection "1; mode=block";

    # 檔案上傳大小限制（依需求調整）
    client_max_body_size 500M;
    
    # 上傳超時設定（大檔案需要）
    proxy_connect_timeout 300s;
    proxy_send_timeout 300s;
    proxy_read_timeout 300s;

    # 主要位置
    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        
        # 必要的 Headers
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # WebSocket 支援
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        
        # 緩衝設定
        proxy_buffering off;
        proxy_request_buffering off;
    }
}