AI support that answers from your docs, and hands the chat to a person when it can't.

import { ChatMessage, RetrievedDocument } from '../providers/types';

export function classifyIntent(query: string): RouteResult {
  const trimmed = query.trim();
  const isPureGreeting = PURE_GREETING_RE.test(trimmed);
  const needsRetrieval = !isPureGreeting;
  const handoffRequested = HANDOFF_RE.test(trimmed);
  return { needsRetrieval, handoffRequested };
}

export function buildSystemPrompt(
  template: string,
  systemName: string,
  docs: RetrievedDocument[],
  memoryContext = '',
): string {
  let system = template.replace(/\{SYSTEM_NAME\}/g, systemName);
  if (docs.length > 0) {
    const context = docs
      .map((d) => `${d.title}\n${d.content}`)
      .join('\n---\n')
      .slice(0, 12000);
    system += `\n\n[CONTEXT]\n${context}\n[/CONTEXT]`;
  }
  return system;
}

export function sanitizeAnswer(answer: string): string {
  const cleaned = answer.trim();
  for (const pattern of BANNED_PATTERNS) {
    if (pattern.test(cleaned)) return GUARDRAIL_FALLBACK;
  }
  return cleaned.slice(0, 8000);
}