'use server'

import { revalidatePath, revalidateTag } from 'next/cache'
import { redirect } from 'next/navigation'
import { CMS_CACHE_TAG } from '@/lib/cms-cache'

const CACHE_PATHS = [
  '/sitemap.xml',
  '/en',
  '/zh',
  '/en/about',
  '/zh/about',
  '/en/where-to-buy',
  '/zh/where-to-buy',
  '/en/downloads',
  '/zh/downloads',
  '/en/media-assets',
  '/zh/media-assets',
  '/en/news',
  '/zh/news',
  '/en/products',
  '/zh/products',
  '/en/support',
  '/zh/support',
  '/en/support/contact',
  '/zh/support/contact',
  '/en/support/faq',
  '/zh/support/faq',
  '/en/support/warranty',
  '/zh/support/warranty',
] as const

const CACHE_ROUTE_PATTERNS = [
  '/en/downloads/[slug]',
  '/zh/downloads/[slug]',
  '/en/media-assets/[category]',
  '/zh/media-assets/[category]',
  '/en/media-assets/[category]/[subcategory]',
  '/zh/media-assets/[category]/[subcategory]',
  '/en/news/[slug]',
  '/zh/news/[slug]',
  '/en/products/[slug]',
  '/zh/products/[slug]',
] as const

function normalizeReturnPath(value: FormDataEntryValue | null) {
  if (typeof value !== 'string') return '/admin'
  if (!value.startsWith('/admin')) return '/admin'
  return value
}

export async function clearFrontendCache(formData: FormData) {
  const returnTo = normalizeReturnPath(formData.get('returnTo'))

  revalidateTag(CMS_CACHE_TAG)

  for (const path of CACHE_PATHS) {
    revalidatePath(path)
  }

  for (const path of CACHE_ROUTE_PATTERNS) {
    revalidatePath(path, 'page')
  }

  redirect(`${returnTo}${returnTo.includes('?') ? '&' : '?'}cache=cleared`)
}

export async function refreshSitemapCache(formData: FormData) {
  const returnTo = normalizeReturnPath(formData.get('returnTo'))

  revalidateTag(CMS_CACHE_TAG)
  revalidatePath('/sitemap.xml')

  redirect(`${returnTo}${returnTo.includes('?') ? '&' : '?'}sitemap=refreshed`)
}