import type {
  GetStaticPathsContext,
  GetStaticPropsContext,
  InferGetStaticPropsType,
} from 'next'
import { getConfig } from '@bigcommerce/storefront-data-hooks/api'
import getPage from '@bigcommerce/storefront-data-hooks/api/operations/get-page'
import getAllPages from '@bigcommerce/storefront-data-hooks/api/operations/get-all-pages'
import getSlug from '@lib/get-slug'
import { Layout, HTMLContent } from '@components/core'
import { missingLocaleInPages } from '@lib/usage-warns'

export async function getStaticProps({
  preview,
  params,
  locale,
}: GetStaticPropsContext<{ pages: string[] }>) {
  const config = getConfig({ locale })
  const { pages } = await getAllPages({ preview, config })
  const path = params?.pages.join('/')
  const slug = locale ? `${locale}/${path}` : path

  const pageItem = pages.find((p) => (p.url ? getSlug(p.url) === slug : false))
  const data =
    pageItem &&
    (await getPage({ variables: { id: pageItem.id! }, config, preview }))
  const page = data?.page

  if (!page) {
    // We throw to make sure this fails at build time as this is never expected to happen
    throw new Error(`Page with slug '${slug}' not found`)
  }

  return {
    props: { pages, page },
    revalidate: 60 * 60, // Every hour
  }
}

export async function getStaticPaths({ locales }: GetStaticPathsContext) {
  const { pages } = await getAllPages()
  const [invalidPaths, log] = missingLocaleInPages()
  const paths = pages
    .map((page) => page.url)
    .filter((url) => {
      if (!url || !locales) return url
      // If there are locales, only include the pages that include one of the available locales
      if (locales.includes(getSlug(url).split('/')[0])) return url

      invalidPaths.push(url)
    })
  log()

  return {
    paths,
    // Fallback shouldn't be enabled here or otherwise this route
    // will catch every page, even 404s, and we don't want that
    fallback: false,
  }
}

export default function Pages({
  page,
}: InferGetStaticPropsType<typeof getStaticProps>) {
  return (
    <div className="max-w-2xl mx-auto py-20">
      {page?.body && <HTMLContent html={page.body} />}
    </div>
  )
}

Pages.Layout = Layout
