# 宏量点云处理软件 - Nginx反向代理配置
# 适用于内网生产环境部署

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

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

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

    # 日志格式
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for" '
                    'rt=$request_time uct="$upstream_connect_time" '
                    'uht="$upstream_header_time" urt="$upstream_response_time"';

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

    # 性能优化
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    # Gzip压缩
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript 
               application/rss+xml application/atom+xml image/svg+xml;

    # 文件上传大小限制 (支持大型点云文件，单文件最大 50 GB)
    client_max_body_size 50G;
    client_body_buffer_size 128M;
    client_body_timeout 3600s;    # 1 小时：50 GB / 15 MB/s ≈ 57 分钟

    # 代理缓冲设置（大文件关闭 proxy_buffering，直接流式转发给 Node）
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;
    proxy_temp_file_write_size 256k;
    proxy_request_buffering off;  # 关键：不缓存请求体，直接流式转发

    # 上游服务器
    upstream app_server {
        server app:3000;
        keepalive 32;
    }

    upstream minio_server {
        server minio:9000;
        keepalive 32;
    }

    # HTTP服务器 (重定向到HTTPS，生产环境启用)
    server {
        listen 80;
        server_name _;

        # 如果启用HTTPS，取消下面的注释
        # return 301 https://$host$request_uri;

        # 如果不使用HTTPS，使用下面的配置
        location / {
            proxy_pass http://app_server;
            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;
            proxy_read_timeout 3600s;
            proxy_connect_timeout 75s;
            proxy_send_timeout 3600s;
            proxy_request_buffering off;
        }

        # API路由
        location /api/ {
            proxy_pass http://app_server;
            proxy_http_version 1.1;
            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_read_timeout 3600s;
            proxy_connect_timeout 75s;
            proxy_send_timeout 3600s;
            proxy_request_buffering off;
        }

        # MinIO存储代理 (可选)
        location /storage/ {
            rewrite ^/storage/(.*) /$1 break;
            proxy_pass http://minio_server;
            proxy_http_version 1.1;
            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;
        }

        # 健康检查端点
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }
    }

    # HTTPS服务器 (生产环境启用，需要配置SSL证书)
    # server {
    #     listen 443 ssl http2;
    #     server_name your-domain.com;
    #
    #     ssl_certificate /etc/nginx/ssl/cert.pem;
    #     ssl_certificate_key /etc/nginx/ssl/key.pem;
    #     ssl_session_timeout 1d;
    #     ssl_session_cache shared:SSL:50m;
    #     ssl_session_tickets off;
    #
    #     ssl_protocols TLSv1.2 TLSv1.3;
    #     ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256;
    #     ssl_prefer_server_ciphers off;
    #
    #     # HSTS
    #     add_header Strict-Transport-Security "max-age=63072000" always;
    #
    #     location / {
    #         proxy_pass http://app_server;
    #         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;
    #         proxy_read_timeout 600s;
    #     }
    # }
}