// Author: fruit.com.cn

import { onMounted, reactive, ref } from 'vue'
import { ElMessage, ElMessageBox } from 'element-plus'
import {
  getAppUserApi,
  listAppUserBanRecordsApi,
  listAppUserWatchHistoryApi,
  pageAppUsersApi,
  updateAppUserStatusApi
} from '@/api/admin/appUser'

/** 账号状态与展示文案，与后端 AppUserStatus 保持一致 */
export const APP_USER_STATUS = [
  { value: 'normal', label: '正常', tag: 'success' },
  { value: 'limited', label: '受限', tag: 'warning' },
  { value: 'banned', label: '封禁', tag: 'danger' },
  { value: 'deactivated', label: '已注销', tag: 'info' }
]

export const COUNTRY_OPTIONS = [
  { value: 'ID', label: '印度尼西亚' },
  { value: 'SG', label: '新加坡' },
  { value: 'MY', label: '马来西亚' },
  { value: 'PH', label: '菲律宾' },
  { value: 'TH', label: '泰国' },
  { value: 'VN', label: '越南' },
  { value: 'CN', label: '中国' }
]

export function statusMeta(status) {
  return (
    APP_USER_STATUS.find((item) => item.value === status) || { label: status || '-', tag: 'info' }
  )
}

const PLATFORM_TEXT = { ANDROID: 'Android', IOS: 'iOS', WEB: 'Web' }

/** 登录会话上的系统，例如 Android 16。没有记录时显示横线。 */
export function systemText(row) {
  const name = PLATFORM_TEXT[row?.platform] || row?.platform || ''
  const version = row?.osVersion || ''
  const text = `${name} ${version}`.trim()
  return text || '—'
}

/** 毫秒转 mm:ss，观看流水里的进度用 */
export function formatDuration(ms) {
  const total = Math.max(0, Math.floor((ms || 0) / 1000))
  const minute = String(Math.floor(total / 60)).padStart(2, '0')
  const second = String(total % 60).padStart(2, '0')
  return `${minute}:${second}`
}

export function useAppUsers() {
  const users = ref([])
  const total = ref(0)
  const loading = ref(false)

  const keyword = ref('')
  const statusFilter = ref(undefined)
  const countryFilter = ref(undefined)
  const currentPage = ref(1)
  const pageSize = ref(10)

  const detailVisible = ref(false)
  const detailLoading = ref(false)
  const detail = ref(null)
  const banRecords = ref([])
  const watchHistory = ref([])

  const statusDialogVisible = ref(false)
  const statusSaving = ref(false)
  const statusTarget = ref(null)
  const statusForm = reactive({ status: 'banned', reason: '' })

  async function load() {
    loading.value = true
    try {
      const res = await pageAppUsersApi({
        pageIndex: currentPage.value,
        pageSize: pageSize.value,
        keyword: keyword.value.trim() || undefined,
        status: statusFilter.value,
        countryCode: countryFilter.value
      })
      users.value = res.data?.list || []
      total.value = res.data?.total || 0
    } finally {
      loading.value = false
    }
  }

  function queryUsers() {
    currentPage.value = 1
    load()
  }

  function resetFilters() {
    keyword.value = ''
    statusFilter.value = undefined
    countryFilter.value = undefined
    queryUsers()
  }

  function handleSizeChange() {
    currentPage.value = 1
    load()
  }

  const detailTabs = reactive({ active: 'watch' })

  async function openDetail(row) {
    detailVisible.value = true
    detailLoading.value = true
    detail.value = row
    banRecords.value = []
    watchHistory.value = []
    detailTabs.active = 'watch'
    try {
      // 三个请求互不依赖，并发拉取，抽屉打开更快
      const [profile, bans, history] = await Promise.all([
        getAppUserApi(row.id),
        listAppUserBanRecordsApi(row.id),
        listAppUserWatchHistoryApi(row.id, 50)
      ])
      detail.value = profile.data || row
      banRecords.value = bans.data || []
      watchHistory.value = history.data || []
    } finally {
      detailLoading.value = false
    }
  }

  function openStatusDialog(row, preset = 'banned') {
    statusTarget.value = row
    statusForm.status = preset
    statusForm.reason = ''
    statusDialogVisible.value = true
  }

  async function confirmStatus() {
    const row = statusTarget.value
    if (!row) return
    const label = statusMeta(statusForm.status).label
    statusSaving.value = true
    try {
      await updateAppUserStatusApi(row.id, statusForm.status, statusForm.reason.trim() || undefined)
      ElMessage.success(`已${label}，该用户全部登录会话已失效`)
      statusDialogVisible.value = false
      await load()
      if (detailVisible.value && detail.value?.id === row.id) {
        detail.value = { ...detail.value, status: statusForm.status }
        banRecords.value = (await listAppUserBanRecordsApi(row.id)).data || []
      }
    } finally {
      statusSaving.value = false
    }
  }

  /** 恢复正常：不需要填原因，但仍要二次确认，避免误点 */
  async function restoreUser(row) {
    try {
      await ElMessageBox.confirm(
        `确认把「${row.nickname || row.uid}」恢复为正常账号？`,
        '恢复正常',
        { confirmButtonText: '确认恢复', cancelButtonText: '取消', type: 'warning' }
      )
    } catch {
      return
    }
    await updateAppUserStatusApi(row.id, 'normal')
    ElMessage.success('账号已恢复正常')
    await load()
    if (detailVisible.value && detail.value?.id === row.id) {
      detail.value = { ...detail.value, status: 'normal' }
    }
  }

  onMounted(load)

  return {
    users,
    total,
    loading,
    keyword,
    statusFilter,
    countryFilter,
    currentPage,
    pageSize,
    detailVisible,
    detailLoading,
    detail,
    banRecords,
    watchHistory,
    detailTabs,
    statusDialogVisible,
    statusSaving,
    statusTarget,
    statusForm,
    load,
    queryUsers,
    resetFilters,
    handleSizeChange,
    openDetail,
    openStatusDialog,
    confirmStatus,
    restoreUser
  }
}