user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # 压缩配置
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

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

        # 安全头设置
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "no-referrer-when-downgrade" always;
        add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;

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

        # HTML文件不缓存
        location ~* \.html$ {
            expires -1;
            add_header Cache-Control "no-cache, no-store, must-revalidate";
        }

        # sitemap.xml 和 robots.txt
        location ~* \.(xml|txt)$ {
            expires 1d;
            add_header Cache-Control "public";
        }

        # 处理Next.js路由
        location / {
            try_files $uri $uri.html $uri/ /index.html;
        }

        # 处理API路由（如果有的话）
        location /api/ {
            return 404;
        }

        # 404错误处理
        error_page 404 /404.html;

        # 500错误处理
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root /usr/share/nginx/html;
        }
    }
}