import { computed, onUnmounted, reactive } from 'vue'
import { onHide, onShow } from '@dcloudio/uni-app'
import { useUserStore } from '@/stores/user'
import { PAGE_PATHS } from '@/config/api'
import { fetchWechatNoticeStatus, startWechatBinding, fetchWechatBindingSession, confirmWechatBinding } from '@/api/wechat-notices'
import { createWechatBindingFlow, initialBindingState } from '@/utils/wechatBindingFlow'

export function useWechatBinding() {
  const user = useUserStore()
  const bindingState = reactive(initialBindingState())
  let active = false
  const bindingAccount = computed(() => user.userInfo?.realName || user.userInfo?.username || '当前登录账号')
  const flow = createWechatBindingFlow({
    state: bindingState,
    getSessionKey: () => user.isLoggedIn ? user.token : '',
    isActive: () => active,
    api: { status: fetchWechatNoticeStatus, start: startWechatBinding, session: fetchWechatBindingSession, confirm: confirmWechatBinding },
    openAuthorization: (authorizeUrl) => new Promise((resolve, reject) => {
      uni.navigateTo({
        url: PAGE_PATHS.wechatBindingAuthorize,
        success: (result) => {
          result.eventChannel.emit('wechatBindingAuthorize', { authorizeUrl })
          resolve()
        },
        fail: () => reject(new Error('打开授权页面失败，请重新绑定'))
      })
    })
  })
  onShow(() => {
    active = true
    user.checkLoginStatus()
    if (!user.isLoggedIn) { uni.reLaunch({ url: PAGE_PATHS.login }); return }
    void flow.refresh()
  })
  const stop = () => { active = false; flow.cancel() }
  onHide(stop)
  onUnmounted(stop)
  return { bindingState, bindingAccount, startBinding: flow.start, refreshBinding: flow.refresh }
}