server {
    listen 80;
    server_name _;

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

    # SPA fallback — all non-file requests go to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests to the backend
    location /api {
        proxy_pass         http://tenant-api:8080;
        proxy_http_version 1.1;
        proxy_set_header   Host              $host;
        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;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }

    # Proxy Swagger UI and OpenAPI JSON to the backend for API testing
    location ^~ /swagger {
        proxy_pass         http://tenant-api:8080;
        proxy_http_version 1.1;
        proxy_set_header   Host              $host;
        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;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
    }

    # Cache static assets aggressively
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    gzip on;
    gzip_static on;
    gzip_vary on;
    gzip_types text/plain text/css application/json application/javascript text/xml;

    brotli_static on;
}