import regionsData from '../../data/regions.json'

export default defineEventHandler((event) => {
  const config = useRuntimeConfig()
  const baseUrl = config.public.siteDomain || 'https://aeseo.store'
  const list = regionsData.list as Array<{ sido: string, sigungu: string, dong: string }>

  const subjects = ['영어', '수학', '국어', '통합과학', '통합사회']
  const grades = ['중학생', '고등학생']

  let xml = `<?xml version="1.0" encoding="UTF-8"?>\n`
  xml += `<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n`

  // 메인
  xml += `  <url>\n    <loc>${baseUrl}/</loc>\n    <changefreq>daily</changefreq>\n    <priority>1.0</priority>\n  </url>\n`

  // 568개 동별 주요 과목 및 학년 URL 생성
  list.forEach(r => {
    // 1. 동 대표
    xml += `  <url>\n    <loc>${baseUrl}/${encodeURIComponent(r.dong)}</loc>\n    <changefreq>weekly</changefreq>\n    <priority>0.8</priority>\n  </url>\n`
    
    // 2. 동-과목-학년 대표 조합
    subjects.slice(0, 3).forEach(sub => {
      xml += `  <url>\n    <loc>${baseUrl}/${encodeURIComponent(r.dong)}-${encodeURIComponent(grades[0])}-${encodeURIComponent(sub)}</loc>\n    <changefreq>weekly</changefreq>\n    <priority>0.7</priority>\n  </url>\n`
    })
  })

  xml += `</urlset>`

  setHeader(event, 'content-type', 'application/xml; charset=utf-8')
  return xml
})