import type { NextRequest } from 'next/server'

/**
 * The product's canonical public domain. Single source of truth — the domain
 * is never spelled out again anywhere in the app (Nash, 2026-09-07: a wrong
 * domain was reaching real users through emailed links; "we use only
 * heavyhaulagent.com").
 *
 * This is the canonical/brand URL used for SEO metadata and for illustrative
 * links in marketing copy. Links generated at request time (invites, intake
 * responses) go through `publicOrigin` instead, so they keep working on
 * staging and localhost.
 */
export const SITE_URL = 'https://heavyhaulagent.com'
export const SITE_DOMAIN = SITE_URL.replace(/^https?:\/\//, '')
export const SUPPORT_EMAIL = `support@${SITE_DOMAIN}`

/**
 * Public origin for links we hand out (invite links, intake responses).
 * Behind a reverse proxy `req.nextUrl.origin` is the internal address
 * (e.g. http://localhost:8001), so an explicit NEXT_PUBLIC_APP_URL wins.
 */
export function publicOrigin(req: NextRequest): string {
  const configured = process.env.NEXT_PUBLIC_APP_URL?.trim().replace(/\/+$/, '')
  return configured || req.nextUrl.origin
}