const COLUMN_LABEL: Record<string, string> = {
  'todo': '待办',
  'in-progress': '进行中',
  'review': '审查',
  'done': '完成',
}

const STATE_KEYS = new Set([
  'column',
  'sessionId',
  'implementSessionId',
  'reviewSessionId',
  'testSessionId',
  'prototypeSessionId',
  'handoffAttachmentId',
  'handoffFrom',
  'handoffRequestFrom',
  'handoffRequestError',
  'pr',
  'branch',
  'worktreePath',
  'color',
  'autoReview',
])

/** 插件自己写的评论。返回系统气泡文案；普通讨论返回 undefined。 */
export function systemCommentText(body: string): string | undefined {
  const trimmed = body.trim()
  if (/<!--\s*spx:review=1\s*-->/i.test(trimmed)) {
    const text = trimmed.replace(/<!--\s*spx:review=1\s*-->/gi, '').trim()
    return text.length > 0 ? text : '提交了审查'
  }
  if (!trimmed.startsWith('{'))
    return undefined
  let parsed: unknown
  try {
    parsed = JSON.parse(trimmed)
  }
  catch {
    return undefined
  }
  if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed))
    return undefined
  const record = parsed as Record<string, unknown>
  if (!Object.keys(record).some(key => STATE_KEYS.has(key)))
    return undefined
  const column = typeof record.column === 'string' ? COLUMN_LABEL[record.column] : undefined
  if (Object.keys(record).length === 1 && column)
    return `把工单放到${column}`
  if (column)
    return `更新了工单状态，放到${column}`
  return '更新了工单状态'
}