// 仅内存去重：工作台重建不会再弹，冷启动或重新登录可以再次检查。
const sessionMemory = { handledSession: '' }

export function createWechatFollowReminder({
  getSessionKey, isActive, loadStatus, showPrompt, openGuide, memory = sessionMemory
}) {
  let revision = 0
  let pending = false

  const cancel = () => {
    revision++
    pending = false
  }

  const check = async () => {
    const session = getSessionKey()
    if (!session || !isActive() || pending || memory.handledSession === session) return
    const currentRevision = ++revision
    const current = () => revision === currentRevision && isActive() && getSessionKey() === session
    pending = true
    let presenting = false
    try {
      const status = await loadStatus()
      if (!current()) return
      memory.handledSession = session
      if (!status.enabled || (status.bound && status.subscribed)) return
      presenting = true
      const confirmed = await showPrompt({
        title: status.bound ? '关注服务号' : '开启服务号通知',
        content: status.bound
          ? '您绑定的微信尚未关注“山峡化工”服务号，暂时无法接收业务通知。是否前往关注？'
          : '关注“山峡化工”服务号并绑定门户账号，即可接收审批、发放及证件提醒。如已关注，请完成账号绑定。',
        confirmText: status.bound ? '去关注' : '去开启',
        cancelText: '稍后再说',
        confirmColor: '#0a9f6d'
      })
      if (confirmed && current()) openGuide()
    } catch {
      // 状态不可用时不打断登录；弹窗自身失败允许下次进入工作台重试。
      if (presenting && current() && memory.handledSession === session) {
        memory.handledSession = ''
      }
    } finally {
      if (revision === currentRevision) pending = false
    }
  }

  return { check, cancel }
}