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;
    client_max_body_size 20M;

    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript
               application/x-javascript application/xml+rss
               application/javascript application/json;

    server {
        listen 80 default_server;
        listen [::]:80 default_server;
        server_name _;

        root /usr/share/nginx/html;
        index index.html;

        # Health check endpoint
        location /api/health {
            access_log off;
            add_header Content-Type application/json;
            return 200 '{"status":"ok"}';
        }

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

        # HTML files - no cache
        location ~* \.html$ {
            expires -1;
            add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate";
        }

        # SPA fallback - route all unmatched requests to index.html
        location / {
            try_files $uri $uri/ /index.html;
        }
    }
}