import { env } from "@/env/server"
import { serverClient } from "@/lib/trpc/server"

import type {
  ContentTypeParams,
  LangParams,
  PageArgs,
  UIDParams,
} from "@/types/params"
import type { Lang } from "@/constants/languages"

export async function generateMetadata({
  searchParams,
  params,
}: PageArgs<
  LangParams & ContentTypeParams & UIDParams,
  { subpage?: string; filterFromUrl?: string }
>) {
  const { subpage, filterFromUrl, ...otherSearchParams } = searchParams
  // If there are other (real) search params, we don't want to index the page as this will
  // cause duplicate content issues.
  const noIndexOnSearchParams = !!Object.keys(otherSearchParams).length
  const metadata = await serverClient().contentstack.metadata.get({
    subpage,
    filterFromUrl,
    noIndex: noIndexOnSearchParams,
  })

  if (!metadata) {
    return {
      robots: {
        index: env.isLangLive(params.lang),
        follow: env.isLangLive(params.lang),
      },
    }
  }

  if (typeof metadata?.robots === "string") {
    return metadata
  }

  return {
    ...metadata,
    robots: {
      ...(metadata.robots ?? {}),
      index: isIndexable(metadata.robots?.index, params.lang),
      follow: isIndexable(metadata.robots?.follow, params.lang),
    },
  }
}

function isIndexable(
  pageIndexableFromSettings: boolean | null | undefined,
  lang: Lang
) {
  // If we are live we want to index the page, but if the page has been marked as noindex in contentstack we don't
  return (pageIndexableFromSettings ?? true) && env.isLangLive(lang)
}