user nginx;
worker_processes auto;
worker_rlimit_nofile 65535;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log warn;

events {
    worker_connections 4096;
    use epoll;
    multi_accept on;
}

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

    # Logging
    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;

    # Performance
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 10M;

    # Gzip compression
    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 application/atom+xml image/svg+xml
               text/x-js text/x-component text/x-cross-domain-policy;
    gzip_disable "msie6";

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    upstream php_upstream {
        server 127.0.0.1:9000;
        keepalive 16;
    }

    server {
        listen 80 default_server;
        server_name _;

        root /var/www/public;
        index index.php index.html;

        # Health check endpoint
        location /api/ping {
            access_log off;
            return 200 "pong";
            add_header Content-Type text/plain;
        }

        # Main routing
        location / {
            try_files $uri $uri/ /index.php?$query_string;
        }

        # PHP-FPM
        location ~ \.php$ {
            fastcgi_pass php_upstream;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;
            fastcgi_keep_conn on;
            fastcgi_connect_timeout 60s;
            fastcgi_send_timeout 60s;
            fastcgi_read_timeout 60s;
        }

        # Security: Deny access to hidden files
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        # Cache static assets
        location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot)$ {
            expires 30d;
            add_header Cache-Control "public, immutable";
            access_log off;
        }

        # Deny access to specific files
        location ~ /\.(env|example|md)$ {
            deny all;
        }
    }
}