import { readSiteDocument } from '../utils/db'

const escapeXml = (value: string) => value.replace(/[<>&'\"]/g, character => ({ '<': '&lt;', '>': '&gt;', '&': '&amp;', "'": '&apos;', '"': '&quot;' })[character]!)

export default defineEventHandler((event) => {
  const baseUrl = String(useRuntimeConfig().public.siteUrl).replace(/\/$/, '')
  const { data, publishedAt } = readSiteDocument('published')
  const paths = ['/', '/luhui', '/products', '/news', '/statements', '/team', '/privacy', '/terms']
  data.products.filter(item => item.status === 'published').forEach(item => paths.push(`/products/${item.slug}`))
  data.articles.filter(item => item.status === 'published').forEach(item => paths.push(`/${item.type === 'statement' ? 'statements' : 'news'}/${item.slug}`))
  setHeader(event, 'Content-Type', 'application/xml; charset=utf-8')
  setHeader(event, 'Cache-Control', 'public, max-age=300, stale-while-revalidate=600')
  return `<?xml version="1.0" encoding="UTF-8"?>\n<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n${paths.map(path => `  <url><loc>${escapeXml(`${baseUrl}${path}`)}</loc><lastmod>${escapeXml(publishedAt.slice(0, 10))}</lastmod></url>`).join('\n')}\n</urlset>`
})