import { currentUser as mockCurrentUser } from '@/data/mock'

const APPLY_KEY = 'aimill_hr_applications'
const DRAFT_KEY = 'aimill_hr_application_drafts'
const APPROVAL_KEY = 'aimill_hr_approval_results'
const TRAINING_KEY = 'aimill_hr_training_progress'
const PROFILE_KEY = 'aimill_hr_profile_changes'
const AUTH_KEY = 'aimill_hr_auth'
const REMEMBER_KEY = 'aimill_hr_remembered_account'
const PASSWORD_MEMO_KEY = 'passwordMemo'
const PASSWORD_INFO_KEY = 'passInfo'
const TOKEN_KEY = 'token'
const USER_INFO_KEY = 'userInfo'
const TREE_KEY = 'treeList'
const AUTHORITIES_KEY = 'authorities'
const CURRENT_USER_KEY = 'currentUser'
const API_INFO_KEY = 'apiInfo'

export const DEMO_ACCOUNT = 'ZY20230128'
export const DEMO_PASSWORD = '123456'

export function saveLoginSession(data, account) {
  const userInfo = data && typeof data === 'object' ? data : {}
  const token = userInfo.token || `demo-token-${Date.now()}`
  const normalizedAccount = String(account || userInfo.loginName || '').trim().toUpperCase()

  uni.setStorageSync(TOKEN_KEY, token)
  uni.setStorageSync(USER_INFO_KEY, { ...userInfo, token, loginName: normalizedAccount })
  uni.setStorageSync(AUTH_KEY, { account: normalizedAccount, loggedInAt: Date.now() })
}

export function login(account, password, remember = true) {
  const normalizedAccount = String(account || '').trim().toUpperCase()
  if (normalizedAccount !== DEMO_ACCOUNT || String(password) !== DEMO_PASSWORD) {
    return false
  }

  saveLoginSession({
    token: `demo-token-${Date.now()}`,
    sessionId: 'demo-session',
    userId: normalizedAccount,
    userName: '陈晓雨',
    loginName: normalizedAccount,
  }, normalizedAccount)
  saveRememberedCredentials({
    account: normalizedAccount,
    password,
    rememberPassword: remember,
  })
  savePermissionData([], [])
  return true
}

export function logout() {
  [AUTH_KEY, TOKEN_KEY, USER_INFO_KEY, TREE_KEY, AUTHORITIES_KEY, CURRENT_USER_KEY].forEach((key) =>
    uni.removeStorageSync(key),
  )
}

export function isLoggedIn() {
  return Boolean(uni.getStorageSync(TOKEN_KEY) && uni.getStorageSync(USER_INFO_KEY))
}

// 服务器模式下需要的是真实 token（demo 登录的是 demo-token- 开头，残留时视为无效）
export function hasServerAuth() {
  const token = uni.getStorageSync(TOKEN_KEY)
  const userInfo = uni.getStorageSync(USER_INFO_KEY)
  return Boolean(token && userInfo && !String(token).startsWith('demo-token-'))
}

export function getRememberedAccount() {
  return getRememberedCredentials().account
}

export function saveRememberedCredentials({ account, password, rememberPassword }) {
  const normalizedAccount = String(account || '').trim()
  if (!rememberPassword) {
    uni.removeStorageSync(PASSWORD_MEMO_KEY)
    uni.removeStorageSync(PASSWORD_INFO_KEY)
    uni.removeStorageSync(REMEMBER_KEY)
    return
  }
  uni.setStorageSync(PASSWORD_MEMO_KEY, '1')
  uni.setStorageSync(PASSWORD_INFO_KEY, { username: normalizedAccount, passwd: String(password || '') })
  uni.setStorageSync(REMEMBER_KEY, normalizedAccount)
}

export function getRememberedCredentials() {
  const remembered = uni.getStorageSync(PASSWORD_INFO_KEY) || {}
  const rememberPassword = uni.getStorageSync(PASSWORD_MEMO_KEY) === '1'
  return {
    account: remembered.username || uni.getStorageSync(REMEMBER_KEY) || '',
    password: rememberPassword ? remembered.passwd || '' : '',
    rememberPassword,
  }
}

export function savePermissionData(tree, authorities) {
  uni.setStorageSync(TREE_KEY, JSON.stringify(Array.isArray(tree) ? tree : []))
  uni.setStorageSync(AUTHORITIES_KEY, JSON.stringify(Array.isArray(authorities) ? authorities : []))
}

export function getLoginUser() {
  return uni.getStorageSync(USER_INFO_KEY) || null
}

export function saveCurrentUser(data) {
  if (!data) return
  uni.setStorageSync(CURRENT_USER_KEY, data)
}

// 把 /system/account/getLoginUser 的 CurrentUserVO 映射成页面里使用的字段
function mapCurrentUser(vo) {
  if (!vo || typeof vo !== 'object') return null
  const name = String(vo.name || '')
  return {
    id: vo.jobNumber || vo.loginName || '',
    name,
    initials: name ? name.charAt(0) : '',
    department: vo.deptName || '',
    position: vo.postName || '',
    company: vo.groupName || '',
    phone: vo.phone || '',
    entryDate: vo.entryDate || '',
    workAge: vo.workAge || '',
    raw: vo,
  }
}

function isServerMode() {
  const info = uni.getStorageSync(API_INFO_KEY)
  return Boolean(info && info.mode === 'server')
}

// 演示模式 → mock 数据；服务器模式 → 接口返回的数据；服务器模式未拉到则返回 null
export function getCurrentUser() {
  if (!isServerMode()) return mockCurrentUser
  const stored = uni.getStorageSync(CURRENT_USER_KEY)
  return mapCurrentUser(stored)
}

export function getAuthCredentials() {
  const userInfo = uni.getStorageSync(USER_INFO_KEY) || {}
  return {
    token: userInfo.token || '',
    sessionId: userInfo.sessionId || '',
  }
}

export function clearDemoStorage() {
  [APPLY_KEY, DRAFT_KEY, APPROVAL_KEY, TRAINING_KEY, PROFILE_KEY].forEach((key) =>
    uni.removeStorageSync(key),
  )
}

export function getApplications() {
  const saved = uni.getStorageSync(APPLY_KEY)
  return Array.isArray(saved) ? saved : []
}

export function addApplication(item) {
  const list = getApplications()
  list.unshift({ ...item, id: Date.now(), status: '审批中', createdAt: formatNow() })
  uni.setStorageSync(APPLY_KEY, list)
  return list
}

export function saveDraft(type, form) {
  const drafts = uni.getStorageSync(DRAFT_KEY) || {}
  drafts[type] = { ...form, savedAt: formatNow() }
  uni.setStorageSync(DRAFT_KEY, drafts)
}

export function getDraft(type) {
  const drafts = uni.getStorageSync(DRAFT_KEY) || {}
  return drafts[type] || null
}

export function removeDraft(type) {
  const drafts = uni.getStorageSync(DRAFT_KEY) || {}
  delete drafts[type]
  uni.setStorageSync(DRAFT_KEY, drafts)
}

export function getApprovalResults() {
  const saved = uni.getStorageSync(APPROVAL_KEY)
  return saved && typeof saved === 'object' ? saved : {}
}

export function setApprovalResult(id, status, comment = '') {
  const results = getApprovalResults()
  results[id] = { status, comment, handledAt: formatNow() }
  uni.setStorageSync(APPROVAL_KEY, results)
  return results[id]
}

export function getTrainingProgress(defaults) {
  const saved = uni.getStorageSync(TRAINING_KEY) || {}
  return defaults.map((item) => ({ ...item, progress: saved[item.id] ?? item.progress }))
}

export function setTrainingProgress(id, progress) {
  const saved = uni.getStorageSync(TRAINING_KEY) || {}
  saved[id] = progress
  uni.setStorageSync(TRAINING_KEY, saved)
}

export function saveProfileChange(item) {
  const list = uni.getStorageSync(PROFILE_KEY) || []
  list.unshift({ ...item, id: Date.now(), status: '审核中', createdAt: formatNow() })
  uni.setStorageSync(PROFILE_KEY, list)
  return list
}

export function formatNow() {
  const d = new Date()
  const pad = (n) => String(n).padStart(2, '0')
  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${pad(d.getHours())}:${pad(d.getMinutes())}`
}