/**
 * WhatsApp Helper Utilities for Vietnam Wedding Guide (VWG)
 *
 * Centralizes WhatsApp deep-link generation to ensure:
 * 1. Consistent formatting across all CTAs (floating button, nav, banners, cards).
 * 2. Proper URL encoding of prefilled contextual messages.
 * 3. Consistent phone number targeting (wa.me/84908372168).
 */

export const DEFAULT_WHATSAPP_NUMBER = "84908372168";

export function getWhatsAppUrl(
  message?: string,
  number: string = DEFAULT_WHATSAPP_NUMBER
): string {
  const cleanNumber = (
    process.env.NEXT_PUBLIC_WHATSAPP_NUMBER || number
  ).replace(/[^0-9]/g, "");

  const defaultMsg =
    "Hello Nhi, I would like to inquire about wedding advisory in Vietnam.";
  const text = message?.trim() || defaultMsg;

  return `https://wa.me/${cleanNumber}?text=${encodeURIComponent(text)}`;
}

/**
 * Returns contextual default WhatsApp inquiry message tailored to current route.
 */
export function getContextualWhatsAppMessage(pathname: string): string {
  if (pathname.startsWith("/services/b2b")) {
    return "Hello Nhi, I would like to inquire about B2B Venue Advisory & Resort Consulting in Vietnam.";
  }
  if (
    pathname.startsWith("/services/couples") ||
    pathname.startsWith("/services/private-consultant")
  ) {
    return "Hello Nhi, I would like to inquire about Private Couple Wedding Advisory in Vietnam.";
  }
  if (pathname.startsWith("/services")) {
    return "Hello Nhi, I would like to inquire about your wedding advisory services in Vietnam.";
  }
  if (pathname.startsWith("/blog/")) {
    return "Hello Nhi, I am reading your wedding guide on Vietnam Wedding Guide and would like to ask a question.";
  }
  if (pathname.startsWith("/blog")) {
    return "Hello Nhi, I am browsing your Vietnam Wedding Guides and would like to ask for advisory.";
  }
  if (pathname === "/contact") {
    return "Hello Nhi, I would like to schedule a private discovery consultation for our wedding in Vietnam.";
  }
  if (pathname === "/about") {
    return "Hello Nhi, I just read about the vision of Vietnam Wedding Guide and would like to connect.";
  }

  // Default for Homepage and others
  return "Hello Nhi, I would like to inquire about destination wedding advisory in Vietnam.";
}