import { getSiteSettings } from '../repositories/content-repository'
import { getAnalyticsSummary } from '../repositories/analytics-repository'
import { getPublicBlogStatistics } from '../repositories/blog-statistics-repository'

/**
 * 초 단위 체류 시간을 짧은 한국어 문자열로 변환한다.
 * @param {number} seconds - 초 단위 시간
 * @returns {string} 표시 문자열
 */
const formatDuration = (seconds) => {
  const safeSeconds = Math.max(0, Math.round(Number(seconds) || 0))

  if (safeSeconds < 60) {
    return `${safeSeconds}초`
  }

  const minutes = Math.floor(safeSeconds / 60)
  const restSeconds = safeSeconds % 60

  return restSeconds > 0 ? `${minutes}분 ${restSeconds}초` : `${minutes}분`
}

/**
 * 숫자를 한국어 단위 문자열로 변환한다.
 * @param {number} value - 숫자 값
 * @param {string} unit - 단위
 * @returns {string} 표시 문자열
 */
const formatNumberLabel = (value, unit) => `${Number(value || 0).toLocaleString('ko-KR')}${unit}`

/**
 * gethomepage 커스텀 API용 사이트 요약 위젯 데이터를 반환한다.
 * @returns {Promise<Object>} 위젯 데이터
 */
export default defineEventHandler(async () => {
  const [settings, summary, statistics] = await Promise.all([
    getSiteSettings(),
    getAnalyticsSummary({ days: 1 }),
    getPublicBlogStatistics()
  ])
  const avgEngagedSeconds = summary.todayAvgEngagedSeconds || summary.avgEngagedSeconds || 0

  return {
    title: settings.title || 'sori.studio',
    updatedAt: new Date().toISOString(),
    todayVisitors: summary.todayVisitors,
    totalVisitors: statistics.totalVisitors,
    todayPageViews: summary.todayPageViews,
    totalPageViews: statistics.totalPageViews,
    onlineNow: summary.onlineNow,
    loggedInNow: summary.loggedInNow,
    avgEngagedSeconds,
    visitorsLast7Days: summary.visitorsLast7Days,
    visitorsLast30Days: summary.visitorsLast30Days,
    visitorsLast180Days: summary.visitorsLast180Days,
    visitorsLast365Days: summary.visitorsLast365Days,
    pageViewsLast30Days: summary.pageViewsLast30Days,
    totalPosts: statistics.totalPosts,
    totalComments: statistics.totalComments,
    totalPages: statistics.totalPages,
    totalTags: statistics.totalTags,
    totalMembers: statistics.totalMembers,
    items: [
      {
        name: '오늘 방문자',
        label: formatNumberLabel(summary.todayVisitors, '명'),
        value: summary.todayVisitors
      },
      {
        name: '오늘 페이지뷰',
        label: formatNumberLabel(summary.todayPageViews, '회'),
        value: summary.todayPageViews
      },
      {
        name: '최근 7일 방문자',
        label: formatNumberLabel(summary.visitorsLast7Days, '명'),
        value: summary.visitorsLast7Days
      },
      {
        name: '최근 30일 방문자',
        label: formatNumberLabel(summary.visitorsLast30Days, '명'),
        value: summary.visitorsLast30Days
      },
      {
        name: '최근 6개월 방문자',
        label: formatNumberLabel(summary.visitorsLast180Days, '명'),
        value: summary.visitorsLast180Days
      },
      {
        name: '최근 1년 방문자',
        label: formatNumberLabel(summary.visitorsLast365Days, '명'),
        value: summary.visitorsLast365Days
      },
      {
        name: '현재 접속자',
        label: formatNumberLabel(summary.onlineNow, '명'),
        value: summary.onlineNow
      },
      {
        name: '평균 체류',
        label: formatDuration(avgEngagedSeconds),
        value: avgEngagedSeconds
      },
      {
        name: '누적 방문자',
        label: formatNumberLabel(statistics.totalVisitors, '명'),
        value: statistics.totalVisitors
      },
      {
        name: '전체 게시글',
        label: formatNumberLabel(statistics.totalPosts, '개'),
        value: statistics.totalPosts
      },
      {
        name: '전체 댓글',
        label: formatNumberLabel(statistics.totalComments, '개'),
        value: statistics.totalComments
      }
    ]
  }
})