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

    # 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 "strict-origin-when-cross-origin" always;
    add_header Content-Security-Policy "default-src 'self' http: https: ws: wss: data: blob: 'unsafe-inline'; frame-ancestors 'self';" always;

    # Gzip compression
    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;

    # Max upload size (adjust as needed)
    client_max_body_size 64M;

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

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

    # Pass PHP requests to PHP-FPM
    location ~ \.php$ {
        fastcgi_pass app:9000;
        fastcgi_index index.php;
        fastcgi_buffers 16 16k;
        fastcgi_buffer_size 32k;
        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
        include fastcgi_params;

        # AWS ALB / Reverse proxy headers
        fastcgi_param HTTP_X_FORWARDED_FOR $http_x_forwarded_for;
        fastcgi_param HTTP_X_FORWARDED_PROTO $http_x_forwarded_proto;
        fastcgi_param HTTP_X_FORWARDED_PORT $http_x_forwarded_port;

        # Timeouts for long-running requests
        fastcgi_read_timeout 300;
        fastcgi_connect_timeout 60;
        fastcgi_send_timeout 300;
    }

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

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

    # Deny access to sensitive files
    location ~ \.(env|log|sql|sh|bak)$ {
        deny all;
        return 404;
    }

    error_log  /var/log/nginx/error.log warn;
    access_log /var/log/nginx/access.log combined;
}