import brand from "@/brand.config";

/**
 * BRAND constants — driven by brand.config.ts (white-label driven).
 */
export const BRAND = {
  name: brand.name,
  legalName: brand.legalName,
  tagline: brand.tagline,
  description: brand.description,
  domain: brand.domain,
  appUrl: brand.appUrl,
  email: {
    fromName: brand.emailFromName,
    // Composed, not configured. Keeping the mailbox and the domain as one
    // field is how a storefront ends up sending from a domain it does not own.
    fromAddress: `${brand.emailFromMailbox}@${brand.domain}`,
  },
  support: {
    email: brand.supportEmail,
    whatsapp: brand.supportWhatsapp,
    sms: brand.supportWhatsapp,
    statusUrl: brand.supportUrl,
    hoursLocal: "24/7",
    responseTimeMinutes: 5,
  },
  social: brand.social,
} as const;

export const GRADIENTS = {
  hero: "bg-gradient-to-br from-sand-50 via-white to-sand-100",
  heroText: "bg-clip-text text-transparent",
  card: "bg-gradient-to-br from-white to-sand-50",
  glow: "bg-gradient-to-r from-[var(--brand-accent)]/20 via-[var(--brand-accent)]/30 to-[var(--brand-accent-light)]/20",
} as const;

export type SupportChannel = "whatsapp" | "sms" | "email";

export interface SupportLinkContext {
  message?: string;
  orderId?: string;
  iccid?: string;
  skuName?: string;
  subject?: string;
}

export function buildSupportLink(
  channel: SupportChannel,
  context: SupportLinkContext = {},
): string {
  const parts: string[] = [];
  if (context.message?.trim()) parts.push(context.message.trim());
  if (context.orderId) parts.push(`Order: ${context.orderId}`);
  if (context.iccid) parts.push(`ICCID: ${context.iccid}`);
  if (context.skuName) parts.push(`Plan: ${context.skuName}`);
  const body = parts.join("\n");

  if (channel === "whatsapp") {
    const digits = BRAND.support.whatsapp.replace(/\D/g, "");
    return body
      ? `https://wa.me/${digits}?text=${encodeURIComponent(body)}`
      : `https://wa.me/${digits}`;
  }

  if (channel === "sms") {
    return body
      ? `sms:${BRAND.support.sms}?&body=${encodeURIComponent(body)}`
      : `sms:${BRAND.support.sms}`;
  }

  const subject = context.subject?.trim() || `${BRAND.name} support`;
  const qs = new URLSearchParams({ subject });
  if (body) qs.set("body", body);
  return `mailto:${BRAND.support.email}?${qs.toString()}`;
}