import NodeCache from 'node-cache'

import { NextRequest, NextResponse } from 'next/server'

import createMiddleware from 'next-intl/middleware'
import { defineRouting } from 'next-intl/routing'

import { getCountryLanguages } from '@lib/utils/get-country-languages'

import { routing } from '@i18n/routing'

export const config = {
  matcher: [
    '/((?!api|_next/static|_next/image|svg|favicon.ico|robots.txt|test.png|sitemaps).*)',
  ],
}

const cache = new NodeCache()

export async function middleware(request: NextRequest) {
  const localesCacheKey = `locales`
  let locales: string[] = cache.get(localesCacheKey) || []

  const defaultLocaleCacheKey = `default-locale`
  let defaultLocale: string = cache.get(defaultLocaleCacheKey)

  if (locales.length === 0 || !defaultLocale) {
    const languages = await getCountryLanguages(false)
    locales = Object.keys(languages)
    defaultLocale = locales[0]

    cache.set(localesCacheKey, locales)
    cache.set(defaultLocaleCacheKey, defaultLocale)
  }

  const handleI18nRouting = createMiddleware(
    defineRouting({
      locales: locales,
      defaultLocale: defaultLocale,
      pathnames: routing.pathnames,
    })
  )

  const url = new URL(request.url)
  const pathnameParts = url.pathname.split('/').filter(Boolean)

  if (locales.length === 1) {
    if (pathnameParts[0] === defaultLocale) {
      const newPath = `/${pathnameParts.slice(1).join('/')}`
      const cleanedPath = newPath === '/' ? '/' : newPath

      if (url.pathname !== cleanedPath) {
        const response = NextResponse.redirect(new URL(cleanedPath, url.origin))
        response.cookies.set('redirected', 'true', { path: '/', maxAge: 5 }) // Empêcher une boucle
        return response
      }
    }
  }

  const response = handleI18nRouting(request)

  return response
}

import {defineRouting} from 'next-intl/routing';
import {createNavigation} from 'next-intl/navigation';
 
export const routing = defineRouting({
  // A list of all locales that are supported
  locales: ['en', 'de'],
 
  // Used when no locale matches
  defaultLocale: 'en'
});