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

events {
    worker_connections 1024;
}

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

    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;
    client_max_body_size 20M;

    # Gzip 压缩
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript application/json application/javascript application/xml+rss application/rss+xml font/truetype font/opentype application/vnd.ms-fontobject image/svg+xml;

    # HTTP 服务器 - 重定向到 HTTPS
    server {
        listen 80;
        server_name smartsensiguard.cn www.smartsensiguard.cn;

        # 允许 Let's Encrypt 验证
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        # 重定向所有 HTTP 请求到 HTTPS
        location / {
            return 301 https://$host$request_uri;
        }
    }

    # HTTPS 服务器
    server {
        listen 443 ssl;
        http2 on;
        server_name smartsensiguard.cn www.smartsensiguard.cn;

        # SSL 证书配置
        # 注意：如果证书文件包含完整证书链，直接使用 .pem 文件
        # 如果证书和证书链是分开的，需要合并：cat cert.pem chain.pem > fullchain.pem
        ssl_certificate /etc/nginx/ssl/smartsensiguard.cn.pem;
        ssl_certificate_key /etc/nginx/ssl/smartsensiguard.cn.key;
        
        # 如果证书链文件单独存在，取消下面的注释并指定路径
        # ssl_trusted_certificate /etc/nginx/ssl/chain.pem;

        # SSL 安全配置
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';
        ssl_prefer_server_ciphers off;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;
        ssl_session_tickets off;
        
        # SSL 优化配置
        ssl_buffer_size 8k;
        ssl_stapling on;
        ssl_stapling_verify on;
        resolver 8.8.8.8 8.8.4.4 valid=300s;
        resolver_timeout 5s;

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

        # 反向代理到 Next.js 应用
        location / {
            proxy_pass http://marketing-site:3000;
            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;
            
            # 代理缓冲区配置（优化大文件传输）
            proxy_buffer_size 16k;
            proxy_buffers 8 16k;
            proxy_busy_buffers_size 32k;
            proxy_temp_file_write_size 64k;
            proxy_max_temp_file_size 1024m;
            
            # 超时设置
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # 静态文件缓存（优化大图片文件）
        location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot)$ {
            proxy_pass http://marketing-site:3000;
            
            # 静态文件专用缓冲区配置（更大的缓冲区）
            proxy_buffer_size 32k;
            proxy_buffers 16 32k;
            proxy_busy_buffers_size 64k;
            proxy_temp_file_write_size 128k;
            proxy_max_temp_file_size 2048m;
            
            # 启用直接传输，减少内存使用
            proxy_request_buffering off;
            
            proxy_cache_valid 200 1d;
            expires 1d;
            add_header Cache-Control "public, immutable";
        }
    }
}