/** href builders — single place for every internal route, so entity pages can be added later without touching callers. */

export const SITE_URL = (process.env.NEXT_PUBLIC_SITE_URL ?? "https://www.datacenterindex.io").replace(/\/$/, "");

export const routes = {
  home: () => "/",
  map: (qs?: string) => (qs ? `/map?${qs}` : "/map"),
  search: (q?: string) => (q ? `/search?q=${encodeURIComponent(q)}` : "/search"),
  live: (qs?: string) => (qs ? `/live?${qs}` : "/live"),
  datacenters: (qs?: string) => (qs ? `/datacenters?${qs}` : "/datacenters"),
  facility: (slug: string) => `/datacenters/${slug}`,
  operators: () => "/operators",
  operator: (slug: string) => `/operators/${slug}`,
  countries: () => "/countries",
  country: (slug: string) => `/countries/${slug}`,
  markets: () => "/datacenters/markets",
  market: (slug: string) => `/datacenters/markets/${slug}`,
  projects: (qs?: string) => (qs ? `/projects?${qs}` : "/projects"),
  project: (slug: string) => `/projects/${slug}`,
  rankings: (key?: string) => (key ? `/rankings#${key}` : "/rankings"),
  ranking: (key: string) => `/rankings/${key}`,
  bot: () => "/bot",
  cloudRegions: () => "/cloud-regions",
  cloudRegion: (slug: string) => `/cloud-regions/${slug}`,
  ixps: () => "/ixps",
  ixp: (slug: string) => `/ixps/${slug}`,
  sources: () => "/sources",
  source: (id: string) => `/sources/${id}`,
  methodology: () => "/methodology",
  about: () => "/about",
  apiDocs: () => "/api/v1/docs",
  // 2026-09-12 — intelligence graph
  ai: () => "/ai-infrastructure",
  pulse: (qs?: string) => (qs ? `/pulse?${qs}` : "/pulse"),
  explore: (qs?: string) => (qs ? `/explore?${qs}` : "/explore"),
  compareOperators: (slugs?: string[]) => (slugs?.length ? `/compare/operators?slugs=${slugs.map(encodeURIComponent).join(",")}` : "/compare/operators"),
  coverage: () => "/coverage",
  power: () => "/power",
  connectivity: () => "/connectivity",
  download: () => "/download",
  apiDocsPage: () => "/developers",
  watchlist: () => "/watchlist",
  timeMachine: () => "/map?layer=facilities&time=1",
} as const;

/** Entity link from an event / generic (type, slug). Unknown types fall back to search. */
export function entityHref(type: string, slug: string | null | undefined, name?: string): string {
  if (!slug) return routes.search(name);
  switch (type) {
    case "facility":
    case "campus":
      return routes.facility(slug);
    case "operator":
    case "company":
    case "carrier":
      return routes.operator(slug);
    case "country":
      return routes.country(slug);
    case "metro":
    case "city":
      return routes.market(slug);
    case "project":
    case "construction_phase":
    case "expansion":
      return routes.project(slug);
    case "cloud_region":
      return routes.cloudRegion(slug);
    case "ixp":
      return routes.ixp(slug);
    case "source":
      return routes.source(slug);
    default:
      return routes.search(name ?? slug);
  }
}

/** Desktop primary navigation (spec §101): Map · Facilities · Markets · Operators · Projects · AI · Live, then "More". */
export const NAV_PRIMARY = [
  { label: "Map", href: routes.map() },
  { label: "Facilities", href: routes.datacenters() },
  { label: "Markets", href: routes.markets() },
  { label: "Operators", href: routes.operators() },
  { label: "Projects", href: routes.projects() },
  { label: "AI", href: routes.ai() },
  { label: "Live", href: routes.live() },
] as const;

/** "More" menu: countries, cloud, IXPs, power, connectivity, rankings, pulse, explore, compare, coverage, sources, methodology, API, downloads. */
export const NAV_MORE = [
  { label: "Countries", href: routes.countries() },
  { label: "Cloud regions", href: routes.cloudRegions() },
  { label: "Internet exchanges", href: routes.ixps() },
  { label: "Power & grid", href: routes.power() },
  { label: "Connectivity", href: routes.connectivity() },
  { label: "Rankings", href: routes.rankings() },
  { label: "Pulse", href: routes.pulse() },
  { label: "Explore", href: routes.explore() },
  { label: "Compare operators", href: routes.compareOperators() },
  { label: "Coverage", href: routes.coverage() },
  { label: "Watchlist", href: routes.watchlist() },
  { label: "Sources", href: routes.sources() },
  { label: "Methodology", href: routes.methodology() },
  { label: "Downloads", href: routes.download() },
  { label: "API", href: routes.apiDocsPage() },
  { label: "About", href: routes.about() },
] as const;