/**
 * AI 取名结果解析（从 ai-name 页面抽出，供创作页与详情弹窗共用）
 *
 * 后端返回的 content 可能是：
 *  1) JSON（{ summary, names: [] }）
 *  2) JSON Lines（每行一个 {type:'summary'|'name'}）
 *  3) 【名字】+ 拼音/评分/出处… 的标记文本
 */

export function parseNameResult(content) {
  if (!content) return { summary: '', names: [] }
  let text = String(content).trim()
    .replace(/^```json\s*/i, '')
    .replace(/^```\s*/i, '')
    .replace(/```$/i, '')
    .trim()

  const line = parseJsonLines(text)
  if (line.names.length) return line

  const marked = parseMarkedText(text)
  if (marked.names.length) return marked

  const s = text.indexOf('{')
  const e = text.lastIndexOf('}')
  if (s >= 0 && e > s) text = text.substring(s, e + 1)
  try {
    const d = JSON.parse(text)
    return { summary: d.summary || '', names: Array.isArray(d.names) ? d.names : [] }
  } catch {
    return { summary: text, names: [] }
  }
}

function parseJsonLines(text) {
  const d = { summary: '', names: [] }
  String(text || '').split(/\r?\n/).forEach((l) => {
    l = l.trim()
    if (!l) return
    try {
      const i = JSON.parse(l)
      if (i.type === 'summary') d.summary = i.content || ''
      if (i.type === 'name' && i.data) d.names.push(i.data)
    } catch { /* 忽略非 JSON 行 */ }
  })
  return d
}

function parseMarkedText(text) {
  const d = { summary: '', names: [] }
  const v = String(text || '')
  const sm = v.match(/整体建议[:：]([\s\S]*?)(?=\n\s*【|$)/)
  if (sm) d.summary = sm[1].trim()
  const reg = /【([^】]+)】([\s\S]*?)(?=\n\s*【|$)/g
  let m
  while ((m = reg.exec(v))) {
    const body = m[2] || ''
    const name = resolveNameBlockTitle(m[1], body)
    d.names.push({
      name,
      pinyin: matchField(body, '拼音'),
      score: parseInt(matchField(body, '评分')) || 90,
      source: matchField(body, '出处'),
      wuxing: matchField(body, '五行'),
      meaning: matchField(body, '寓意'),
      tone: matchField(body, '音律'),
      reason: matchField(body, '推荐'),
    })
  }
  d.names = d.names.filter(i => i.name).slice(0, 5)
  return d
}

function resolveNameBlockTitle(title, body) {
  const n = String(title || '').trim()
  if (!['姓名', '名字', '候选名'].includes(n)) return n
  const fr = /^(拼音|评分|出处|五行|寓意|音律|推荐)[:：]/
  const line = String(body || '').split(/\r?\n/).map(i => i.trim()).find(i => i && !fr.test(i))
  return line ? line.replace(/^姓名[:：]/, '').trim() : n
}

function matchField(body, label) {
  const r = new RegExp(`${label}[:：]([^\\n\\r]*)`)
  const m = String(body || '').match(r)
  return m ? m[1].trim() : ''
}

/** 名字详情展示字段 */
export const NAME_FIELDS = [
  { key: 'source', label: '出处' },
  { key: 'wuxing', label: '五行' },
  { key: 'meaning', label: '寓意' },
  { key: 'tone', label: '音律' },
  { key: 'reason', label: '推荐' },
]

/** 把名字结果拼成可复制文本 */
export function buildNameCopyText(result) {
  const names = result?.names || []
  if (!names.length) return ''
  const lines = []
  if (result.summary) lines.push(result.summary)
  names.forEach((item) => {
    lines.push(`${item.name}${item.score ? `（${item.score}分）` : ''}`)
    NAME_FIELDS.forEach((f) => {
      if (item[f.key]) lines.push(`${f.label}：${item[f.key]}`)
    })
    if (item.pinyin) lines.push(`拼音：${item.pinyin}`)
    lines.push('')
  })
  return lines.join('\n')
}