import store from '@/store'

const STORAGE_KEYS = {
  REGISTERED_USER: 'registeredUser',
  AUTH_TOKEN: 'authToken',
  AUTH_TOKEN_EXPIRES: 'authTokenExpires',
  IS_LOGIN: 'isLogin',
  USER_INFO: 'userInfo',
  HAS_CHECKED_IN: 'hasCheckedIn',
  MY_ROOM_DATA: 'myRoomData',
  CURRENT_BOOKING: 'currentBooking',
  BOOKING_LIST: 'bookingList',
  PENDING_CONTRACTS: 'pendingContracts',
  PENDING_CONTRACT_COUNT: 'pendingContractCount',
  EFFECTIVE_CONTRACTS: 'effectiveContracts',
  MY_APPLICATION: 'myApplication',
  ACTIVE_APPLICATION_CODE: 'activeApplicationCode',
  FAILED_REGISTRATION_DRAFT: 'failedRegistrationDraft',
  HOME_PAGE_TAB_ID: 'homePageTabId',
  MESSAGE_LIST: 'messageList',
  SERVICE_ORDER_LIST: 'serviceOrderList',
  UTILITY_RECHARGE_LIST: 'utilityRechargeList',
  LEGACY_DEMO_CACHE_CLEARED: 'legacyDemoCacheCleared'
}

function getStorage(key, fallback = null) {
  const value = uni.getStorageSync(key)
  return value === '' || typeof value === 'undefined' ? fallback : value
}

function getStoreState() {
  return (store && store.state) || {}
}

function getStoreUser() {
  const user = getStoreState().vuex_user
  return user && typeof user === 'object' ? user : {}
}

function getStorePendingContracts() {
  const list = getStoreState().vuex_pending_contracts
  return Array.isArray(list) ? list : []
}

function getStoreEffectiveContracts() {
  const list = getStoreState().vuex_effective_contracts
  return Array.isArray(list) ? list : []
}

function getStoreValidOrders() {
  const list = getStoreState().vuex_valid_orders
  return Array.isArray(list) ? list : []
}

function getStoreCurrentOrder() {
  return getStoreState().vuex_current_order || null
}

function buildRoomDataFromOrder(order = {}) {
  if (!order || typeof order !== 'object' || !Object.keys(order).length) {
    return null
  }

  const imageUrls = Array.isArray(order.imageUrls)
    ? order.imageUrls
    : typeof order.imageUrls === 'string'
      ? order.imageUrls.split(',').map(item => item.trim()).filter(Boolean)
      : []

  const roomLabel = [
    order.buildingName || order.buildingSectionName || order.unitName || '',
    order.roomNo || order.roomCode || order.roomName || ''
  ].filter(Boolean).join(' ')

  const title = [
    order.areaName || order.campusName || '',
    order.roomTypeName || order.roomType || ''
  ].filter(Boolean).join(' · ')

  const start = String(order.contractStartTime || order.startDate || order.start || order.checkinDate || '').slice(0, 10)
  const end = String(order.contractEndTime || order.endDate || order.end || order.checkoutDate || '').slice(0, 10)

  return {
    ...order,
    id: roomLabel || order.roomNo || order.roomCode || order.orderNo || '',
    roomLabel: roomLabel || order.roomNo || order.roomCode || '',
    titleZh: title || order.roomTypeName || order.roomName || '当前入住房间',
    titleEn: order.roomTypeNameEn || title || order.roomTypeName || 'Current Stay',
    leaseText: [start, end].filter(Boolean).join(' - '),
    image: order.imageUrl || imageUrls[0] || ''
  }
}

function clearStoreSessionState() {
  if (!store || !store.commit) {
    return
  }

  store.commit('$tStore', { name: 'vuex_user', value: {} })
  store.commit('$tStore', { name: 'vuex_checkin_status', value: false })
  store.commit('$tStore', { name: 'vuex_current_order', value: null })
  store.commit('$tStore', { name: 'vuex_pending_contracts', value: [] })
  store.commit('$tStore', { name: 'vuex_pending_contract_count', value: 0 })
  store.commit('$tStore', { name: 'vuex_effective_contracts', value: [] })
  store.commit('$tStore', { name: 'vuex_valid_orders', value: [] })
}

export { STORAGE_KEYS }

export function getRegisteredUser() {
  return getStorage(STORAGE_KEYS.REGISTERED_USER, null)
}

export function saveRegisteredUser(user) {
  uni.setStorageSync(STORAGE_KEYS.REGISTERED_USER, user)
  return user
}

export function getCurrentUser() {
  return getStorage(STORAGE_KEYS.USER_INFO, null)
}

export function saveCurrentUser(user) {
  uni.setStorageSync(STORAGE_KEYS.USER_INFO, user)
  return user
}

export function getLoginStatus() {
  return !!getStorage(STORAGE_KEYS.IS_LOGIN, false)
}

export function setLoginStatus(isLogin) {
  uni.setStorageSync(STORAGE_KEYS.IS_LOGIN, !!isLogin)
  return !!isLogin
}

export function getAuthToken() {
  return getStorage(STORAGE_KEYS.AUTH_TOKEN, '')
}

export function saveAuthToken(token) {
  uni.setStorageSync(STORAGE_KEYS.AUTH_TOKEN, token || '')
  return token || ''
}

export function clearAuthToken() {
  uni.removeStorageSync(STORAGE_KEYS.AUTH_TOKEN)
}

export function getAuthTokenExpires() {
  return getStorage(STORAGE_KEYS.AUTH_TOKEN_EXPIRES, '')
}

export function saveAuthTokenExpires(expires) {
  uni.setStorageSync(STORAGE_KEYS.AUTH_TOKEN_EXPIRES, expires || '')
  return expires || ''
}

export function clearAuthTokenExpires() {
  uni.removeStorageSync(STORAGE_KEYS.AUTH_TOKEN_EXPIRES)
}

export function startLoginSession(user) {
  setLoginStatus(true)
  saveCurrentUser(user)
  if (store && store.commit) {
    store.commit('$tStore', {
      name: 'vuex_user',
      value: user && typeof user === 'object' ? user : {}
    })
  }
  return user
}

export function startAuthorizedLoginSession(user, token, expires) {
  if (token) saveAuthToken(token)
  if (expires) saveAuthTokenExpires(expires)
  return startLoginSession(user)
}

export function registerAndLogin(user) {
  saveRegisteredUser(user)
  startLoginSession(user)
  return user
}

export function clearLoginSession() {
  clearAuthToken()
  clearAuthTokenExpires()
  uni.removeStorageSync('lifeData')
  clearStoreSessionState()
  clearBookingState()
  clearContractState()
  clearMyRoomData()
  uni.removeStorageSync(STORAGE_KEYS.HAS_CHECKED_IN)
  uni.removeStorageSync(STORAGE_KEYS.IS_LOGIN)
  uni.removeStorageSync(STORAGE_KEYS.USER_INFO)
  uni.removeStorageSync(STORAGE_KEYS.MY_APPLICATION)
  uni.removeStorageSync(STORAGE_KEYS.ACTIVE_APPLICATION_CODE)
}

export function getCheckedInStatus() {
  return !!getStorage(STORAGE_KEYS.HAS_CHECKED_IN, false)
}

export function setCheckedInStatus(hasCheckedIn) {
  uni.setStorageSync(STORAGE_KEYS.HAS_CHECKED_IN, !!hasCheckedIn)
  return !!hasCheckedIn
}

export function getMyRoomData() {
  return getStorage(STORAGE_KEYS.MY_ROOM_DATA, null)
}

export function saveMyRoomData(roomData) {
  uni.setStorageSync(STORAGE_KEYS.MY_ROOM_DATA, roomData)
  return roomData
}

export function clearMyRoomData() {
  uni.removeStorageSync(STORAGE_KEYS.MY_ROOM_DATA)
}

export function getCurrentBooking() {
  return getStorage(STORAGE_KEYS.CURRENT_BOOKING, null)
}

export function saveCurrentBooking(booking) {
  uni.setStorageSync(STORAGE_KEYS.CURRENT_BOOKING, booking)
  return booking
}

export function getBookingList() {
  return getStorage(STORAGE_KEYS.BOOKING_LIST, [])
}

export function saveBookingList(list) {
  uni.setStorageSync(STORAGE_KEYS.BOOKING_LIST, list)
  return list
}

export function clearBookingState() {
  uni.removeStorageSync(STORAGE_KEYS.CURRENT_BOOKING)
  uni.removeStorageSync(STORAGE_KEYS.BOOKING_LIST)
}

export function getPendingContracts() {
  return getStorage(STORAGE_KEYS.PENDING_CONTRACTS, [])
}

export function savePendingContracts(list) {
  uni.setStorageSync(STORAGE_KEYS.PENDING_CONTRACTS, list || [])
  return list || []
}

export function getPendingContractCount() {
  return Number(getStorage(STORAGE_KEYS.PENDING_CONTRACT_COUNT, 0) || 0)
}

export function savePendingContractCount(count) {
  const nextCount = Number(count || 0)
  uni.setStorageSync(STORAGE_KEYS.PENDING_CONTRACT_COUNT, nextCount)
  return nextCount
}

export function getEffectiveContracts() {
  return getStorage(STORAGE_KEYS.EFFECTIVE_CONTRACTS, [])
}

export function saveEffectiveContracts(list) {
  uni.setStorageSync(STORAGE_KEYS.EFFECTIVE_CONTRACTS, list || [])
  return list || []
}

function patchContractListSign(list = [], contractNo = '', signImageUrl = '') {
  const targetNo = String(contractNo || '').trim()
  const targetSignImageUrl = String(signImageUrl || '').trim()

  if (!targetNo || !Array.isArray(list) || !list.length) {
    return Array.isArray(list) ? list : []
  }

  return list.map(item => {
    const currentNo = String((item && (item.no || item.contractNo)) || '').trim()
    if (currentNo !== targetNo) {
      return item
    }
    return {
      ...item,
      signImageUrl: targetSignImageUrl || item.signImageUrl || ''
    }
  })
}

export function patchStoredContractSign(contractNo, signImageUrl) {
  const nextPendingContracts = patchContractListSign(getPendingContracts(), contractNo, signImageUrl)
  const nextEffectiveContracts = patchContractListSign(getEffectiveContracts(), contractNo, signImageUrl)

  savePendingContracts(nextPendingContracts)
  saveEffectiveContracts(nextEffectiveContracts)

  return {
    pendingContracts: nextPendingContracts,
    effectiveContracts: nextEffectiveContracts
  }
}

export function clearContractState() {
  uni.removeStorageSync(STORAGE_KEYS.PENDING_CONTRACTS)
  uni.removeStorageSync(STORAGE_KEYS.PENDING_CONTRACT_COUNT)
  uni.removeStorageSync(STORAGE_KEYS.EFFECTIVE_CONTRACTS)
}

export function getListStorage(key) {
  return getStorage(key, [])
}

export function saveListStorage(key, list) {
  uni.setStorageSync(key, list)
  return list
}

export function prependListStorage(key, item) {
  const currentList = getListStorage(key)
  const nextList = [item, ...currentList]
  saveListStorage(key, nextList)
  return nextList
}

export function getMyApplicationList() {
  return getListStorage(STORAGE_KEYS.MY_APPLICATION)
}

export function saveMyApplicationList(list) {
  return saveListStorage(STORAGE_KEYS.MY_APPLICATION, list || [])
}

export function getActiveApplicationCode() {
  return getStorage(STORAGE_KEYS.ACTIVE_APPLICATION_CODE, '')
}

export function saveActiveApplicationCode(code) {
  const nextCode = code || ''
  uni.setStorageSync(STORAGE_KEYS.ACTIVE_APPLICATION_CODE, nextCode)
  return nextCode
}

export function getFailedRegistrationDraft() {
  return getStorage(STORAGE_KEYS.FAILED_REGISTRATION_DRAFT, null)
}

export function saveFailedRegistrationDraft(draft) {
  const nextDraft = draft && typeof draft === 'object' ? draft : null
  if (!nextDraft) {
    uni.removeStorageSync(STORAGE_KEYS.FAILED_REGISTRATION_DRAFT)
    return null
  }
  uni.setStorageSync(STORAGE_KEYS.FAILED_REGISTRATION_DRAFT, nextDraft)
  return nextDraft
}

export function clearFailedRegistrationDraft() {
  uni.removeStorageSync(STORAGE_KEYS.FAILED_REGISTRATION_DRAFT)
}

export function getHomePageTabId() {
  return getStorage(STORAGE_KEYS.HOME_PAGE_TAB_ID, '')
}

export function saveHomePageTabId(tabId) {
  const nextTabId = tabId || ''
  uni.setStorageSync(STORAGE_KEYS.HOME_PAGE_TAB_ID, nextTabId)
  return nextTabId
}

export function buildHomePageUrl(tabId) {
  const nextTabId = tabId || getHomePageTabId()
  return nextTabId
    ? `/pages/index/index?pageId=${encodeURIComponent(nextTabId)}`
    : '/pages/index/index'
}

export function getSessionSnapshot() {
  const storeUser = getStoreUser()
  const storageCurrentUser = getCurrentUser() || {}
  const registeredUser = getRegisteredUser() || {}
  const currentUser = Object.keys(storeUser).length ? storeUser : storageCurrentUser
  const resolvedUser = Object.keys(currentUser).length ? currentUser : registeredUser
  const storeCurrentOrder = getStoreCurrentOrder()
  const storeBookingList = getStoreValidOrders()
  const storePendingContracts = getStorePendingContracts()
  const storeEffectiveContracts = getStoreEffectiveContracts()
  const currentBooking = resolvedUser.currentBooking || getCurrentBooking()
  const pendingContractCount = storePendingContracts.length || getPendingContractCount()
  const hasCheckedIn = !!(resolvedUser.hasCheckedIn || getStoreState().vuex_checkin_status || getCheckedInStatus())
  const myRoomData = hasCheckedIn
    ? (getMyRoomData() || buildRoomDataFromOrder(storeCurrentOrder))
    : null
  const isLogin = getLoginStatus() || !!Object.keys(currentUser).length

  return {
    isLogin,
    currentUser,
    registeredUser,
    resolvedUser,
    hasCheckedIn: isLogin && hasCheckedIn,
    currentBooking,
    bookingList: storeBookingList.length ? storeBookingList : getBookingList(),
    myRoomData,
    pendingContracts: storePendingContracts.length ? storePendingContracts : getPendingContracts(),
    pendingContractCount,
    effectiveContracts: storeEffectiveContracts.length ? storeEffectiveContracts : getEffectiveContracts()
  }
}

export function clearLegacyDemoCache() {
  if (uni.getStorageSync(STORAGE_KEYS.LEGACY_DEMO_CACHE_CLEARED)) {
    return
  }
  ;[
    STORAGE_KEYS.CURRENT_BOOKING,
    STORAGE_KEYS.BOOKING_LIST,
    STORAGE_KEYS.MY_APPLICATION,
    STORAGE_KEYS.MESSAGE_LIST,
    STORAGE_KEYS.SERVICE_ORDER_LIST,
    STORAGE_KEYS.UTILITY_RECHARGE_LIST
  ].forEach(key => {
    uni.removeStorageSync(key)
  })
  uni.setStorageSync(STORAGE_KEYS.LEGACY_DEMO_CACHE_CLEARED, true)
}