/**
 * Soul创业派对 - 超级个体动态在阅读页（文章详情模式）中的解析与渲染
 */

function formatSuperArticleTime(value) {
  if (!value) return ''
  const d = new Date(value)
  if (isNaN(d.getTime())) return ''
  const m = `${d.getMonth() + 1}`.padStart(2, '0')
  const day = `${d.getDate()}`.padStart(2, '0')
  const hh = `${d.getHours()}`.padStart(2, '0')
  const mm = `${d.getMinutes()}`.padStart(2, '0')
  return `${m}-${day} ${hh}:${mm}`
}

function parseImagesField(images) {
  if (images == null) return []
  if (typeof images === 'string') {
    const s = images.trim()
    if (!s) return []
    try {
      const p = JSON.parse(s)
      return Array.isArray(p) ? p : []
    } catch (_) {
      return []
    }
  }
  return Array.isArray(images) ? images : []
}

function normalizeArticleImageSrc(raw, baseUrl) {
  const u = String(raw || '').trim()
  if (!u || u === 'undefined' || u === 'null') return ''
  if (/^https?:\/\//i.test(u)) return u
  if (u.startsWith('//')) return `https:${u}`
  if (u.startsWith('wxfile://') || u.startsWith('cloud://')) return u
  const base = String(baseUrl || '').replace(/\/$/, '')
  if (u.startsWith('/') && base) return `${base}${u}`
  return u
}

function buildGalleryItems(imagesField, baseUrl) {
  const rawList = parseImagesField(imagesField)
  return rawList.map((url, idx) => {
    const src = normalizeArticleImageSrc(String(url || '').trim(), baseUrl)
    const ok =
      !!src &&
      (/^https?:\/\//i.test(src) || src.startsWith('wxfile://') || src.startsWith('cloud://'))
    return { idx, src: ok ? src : '', loadFailed: false }
  })
}

function renderSuperArticleHtml(text) {
  const src = String(text || '')
  const isHtml = /<[a-z][\s\S]*>/i.test(src)

  if (isHtml) {
    return src.replace(/<a\b([^>]*)>/gi, (full, attrs) => {
      if (!/href\s*=/.test(attrs)) return full
      const hasStyle = /\sstyle\s*=/.test(attrs)
      const styleText = 'color:#22d3ee;text-decoration:underline;word-break:break-all;'
      if (hasStyle) {
        return `<a${attrs.replace(/\sstyle\s*=\s*(['"])(.*?)\1/i, (_m, q, s) => ` style=${q}${s};${styleText}${q}`)}>`
      }
      return `<a${attrs} style="${styleText}">`
    })
  }

  const escaped = src
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
  const withMentions = escaped.replace(/(^|[\s])(@[\u4e00-\u9fa5A-Za-z0-9_]+)/g, '$1<span style="color:#67e8f9;">$2</span>')
  const withTags = withMentions.replace(/(^|[\s])(#[^\s#]+)/g, '$1<span style="color:#5eead4;">$2</span>')
  const withLinks = withTags.replace(
    /(https?:\/\/[^\s<]+)/g,
    '<a href="$1" style="color:#22d3ee;text-decoration:underline;word-break:break-all;">$1</a>'
  )
  return withLinks.replace(/\n/g, '<br/>')
}

/** 根据详情接口 data + 当前登录用户，生成 setData 用的文案与按钮态 */
function buildSuperArticleAuditMeta(article, viewerUserId) {
  const uid = viewerUserId
  const isOwner = !!(uid != null && article && String(article.userId) === String(uid))
  const st = String((article && article.auditStatus) || 'approved').toLowerCase()
  let auditTip = ''
  let auditRejectReason = ''
  let showAuditEdit = false
  if (isOwner && st === 'pending') {
    auditTip = '审核中：通过后将在动态广场展示'
  } else if (isOwner && st === 'rejected') {
    auditTip = '未通过审核'
    auditRejectReason = String((article && article.rejectReason) || '').trim()
    showAuditEdit = true
  }
  return { auditTip, auditRejectReason, showAuditEdit }
}

module.exports = {
  formatSuperArticleTime,
  parseImagesField,
  normalizeArticleImageSrc,
  buildGalleryItems,
  renderSuperArticleHtml,
  buildSuperArticleAuditMeta,
}