import { escapeRegExp } from "../../utils.js";

export const WHATSAPP_GROUP_INTRO_HINT =
  "WhatsApp IDs: SenderId is the participant JID (group participant id).";

export function resolveWhatsAppGroupIntroHint(): string {
  return WHATSAPP_GROUP_INTRO_HINT;
}

export function resolveWhatsAppMentionStripPatterns(ctx: { To?: string | null }): string[] {
  const selfE164 = (ctx.To ?? "").replace(/^whatsapp:/, "");
  if (!selfE164) {
    return [];
  }
  const escaped = escapeRegExp(selfE164);
  return [escaped, `@${escaped}`];
}