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;

    # 헤더 및 쿠키 버퍼 크기 증가
    large_client_header_buffers 4 32k;
    client_header_buffer_size 32k;

    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;

    server {
        listen 8080;
        server_name _;

        # Health check endpoint
        location /health {
            access_log off;
            return 200 "OK\n";
            add_header Content-Type text/plain;
        }

        # Proxy to Next.js standalone server
        location / {
            proxy_pass http://localhost:3000;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            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;

            # Timeouts - 이미지 생성은 시간이 오래 걸리므로 3분으로 설정
            proxy_connect_timeout 180s;
            proxy_send_timeout 180s;
            proxy_read_timeout 180s;

            # 프록시 버퍼 크기 증가
            proxy_buffer_size 32k;
            proxy_buffers 4 32k;
            proxy_busy_buffers_size 64k;
        }

        # Static files
        location /_next/static {
            proxy_pass http://localhost:3000;
            proxy_cache_valid 200 60m;
            add_header Cache-Control "public, max-age=3600, immutable";
        }

        # Public files
        location /runtime-env.js {
            root /usr/share/nginx/html;
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
            add_header Expires "0";
        }
    }
}
