import { getMethod, getRequestHeader, getRequestURL, setResponseHeader } from 'h3'
import { isBotUserAgent } from '../../lib/analytics'
import {
  createVisitorHashFromEvent,
  recordAnalyticsPageview
} from '../repositories/analytics-repository'
import { getPageBySlug } from '../repositories/content-repository'

/**
 * 공개 페이지가 HTML 문서 모드일 때 Nuxt 렌더링 대신 원문 HTML을 응답한다.
 * @param {import('h3').H3Event} event - 요청 이벤트
 * @returns {Promise<string | void>} HTML 문서 또는 다음 핸들러 진행
 */
export default defineEventHandler(async (event) => {
  const method = getMethod(event)

  if (method !== 'GET' && method !== 'HEAD') {
    return
  }

  const pathname = getRequestURL(event).pathname
  const match = pathname.match(/^\/pages\/([^/]+)\/?$/)

  if (!match) {
    return
  }

  const slug = decodeURIComponent(match[1])
  const page = await getPageBySlug(slug)

  if (page?.renderMode !== 'html_document') {
    return
  }

  if (method === 'GET' && !isBotUserAgent(String(getRequestHeader(event, 'user-agent') || ''))) {
    await recordAnalyticsPageview({
      visitorHash: createVisitorHashFromEvent(event),
      pageId: page.id,
      recordSite: true,
      recordView: true,
      recordRead: false
    })
  }

  setResponseHeader(event, 'content-type', 'text/html; charset=utf-8')
  setResponseHeader(event, 'cache-control', 'no-cache')

  return page.content || ''
})