import type { HookEvent } from '../../src/types.js';
import { writeAuditLog } from '../../src/utils/logger.js';

const SUBSCRIBED_EVENTS = new Set([
  'message:received',
  'message:sent',
  'command:new',
  'command:reset',
  'command:stop',
  'gateway:startup',
  'agent:bootstrap',
]);

const handler = async (event: HookEvent): Promise<void> => {
  try {
    const { type, action, context, sessionKey, timestamp } = event;
    const key = `${type}:${action}`;
    if (!SUBSCRIBED_EVENTS.has(key)) return;

    const metadata: Record<string, unknown> = {};
    if (type === 'message' && context.content) {
      metadata.messageLength = context.content.length;
    }
    if (context.success !== undefined) {
      metadata.success = context.success;
    }

    writeAuditLog({
      timestamp: timestamp.toISOString(),
      event: key,
      sessionKey,
      channel: context.channelId,
      isGroup: context.isGroup,
      alerts: [],
      metadata,
    });
  } catch (err) {
    console.error(
      '[security-guardrails:audit-logger] Error:',
      err instanceof Error ? err.message : String(err),
    );
  }
};

export default handler;