import { inviteApi } from '@/api/index.js'
import { useUserStore } from '@/store/user.js'

const DEFAULT_SHARE = {
  title: 'AI在线｜开箱即用的 AI 工具箱',
  imageUrl: '',
  path: '/pages/toolbox/toolbox'
}

const shareState = {
  loaded: false,
  loading: null,
  token: '',
  share: {},
  config: {}
}

function appendQuery(path, query = {}) {
  let nextPath = path || DEFAULT_SHARE.path
  const pairs = Object.keys(query)
    .filter((key) => query[key] !== undefined && query[key] !== null && query[key] !== '')
    .map((key) => `${encodeURIComponent(key)}=${encodeURIComponent(query[key])}`)

  if (!pairs.length) return nextPath
  nextPath += nextPath.includes('?') ? '&' : '?'
  return nextPath + pairs.join('&')
}

function getInviteCode() {
  const userStore = useUserStore()
  userStore.restore()
  const user = userStore.userInfo || {}
  return user.open_id || user.user_open_id || user.invite_code || uni.getStorageSync('open_id') || ''
}

export function getInviteSharePath(options = {}) {
  const inviteCode = getInviteCode()
  // 与邀请好友页保持同一落地逻辑：统一进入邀请落地页。
  // 未登录时 invite_code 为空，好友仍能进入活动说明；登录用户会携带自己的 open_id。
  const path = `/pages/invite/landing?invite_code=${encodeURIComponent(inviteCode)}`
  return appendQuery(path, { source: options.source })
}

export async function preloadInviteShare() {
  const userStore = useUserStore()
  userStore.restore()
  const currentToken = userStore.token || ''

  if (!currentToken) {
    shareState.loaded = true
    shareState.token = ''
    shareState.share = {}
    shareState.config = {}
    return shareState
  }
  if (shareState.loaded && shareState.token === currentToken) return shareState
  if (shareState.loading) return shareState.loading

  shareState.loading = inviteApi.getMy({}, { authSilent: true })
    .then((res) => {
      const data = res.data || {}
      shareState.share = data.share || {}
      shareState.config = data.config || {}
      shareState.token = currentToken
      shareState.loaded = true
      return shareState
    })
    .catch(() => {
      shareState.loaded = true
      return shareState
    })
    .finally(() => {
      shareState.loading = null
    })

  return shareState.loading
}

export function buildShareOptions(options = {}) {
  const share = shareState.share || {}
  const config = shareState.config || {}
  const path = appendQuery(
    options.path || share.path || getInviteSharePath(),
    { source: options.source }
  )

  return {
    title: options.title || share.title || config.share_title || DEFAULT_SHARE.title,
    path,
    imageUrl: options.imageUrl || share.image || config.share_image || DEFAULT_SHARE.imageUrl
  }
}

export function showPageShareMenu() {
  preloadInviteShare()
  try {
    uni.showShareMenu({ withShareTicket: true })
  } catch (e) {}
}