server {
    listen 80;
    server_name localhost;
    root /var/www/public;
    index index.php index.html index.htm;

    # Handle static files
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Handle PHP files
    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    # PHP processing
    location ~ \.php$ {
        fastcgi_pass app:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;

        # Security headers
        fastcgi_param HTTPS off;
        fastcgi_param HTTP_X_FORWARDED_PROTO $scheme;
        fastcgi_param HTTP_X_REAL_IP $remote_addr;
        fastcgi_param HTTP_X_FORWARDED_FOR $proxy_add_x_forwarded_for;

        # Timeout settings for long-running operations (like sync processes)
        fastcgi_read_timeout 1800;    # 30 minutes
        fastcgi_send_timeout 1800;    # 30 minutes
        fastcgi_connect_timeout 300;  # 5 minutes

        # Buffer settings for large responses
        fastcgi_buffer_size 128k;
        fastcgi_buffers 256 16k;
        fastcgi_busy_buffers_size 256k;
        fastcgi_temp_file_write_size 256k;
    }

    # Security headers
    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;

    # Hide PHP version
    fastcgi_hide_header X-Powered-By;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/xml+rss
        application/json;
}