server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip 压缩
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
    gzip_min_length 1000;

    # Vue Router history 模式支持
    location / {
        try_files $uri $uri/ /index.html;
    }

    # API 代理到后端
    location /api/ {
        proxy_pass http://backend:5001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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;
        proxy_cache_bypass $http_upgrade;
        
        # 超时设置（模拟可能耗时较长）
        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }

    # 健康检查代理
    location /health {
        proxy_pass http://backend:5001/health;
    }

    # 静态文件缓存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
}