import Avatar from '@/components/ui/Avatar'
import Badge from '@/components/ui/Badge'
import Button from '@/components/ui/Button'
import Dropdown from '@/components/ui/Dropdown'
import ScrollBar from '@/components/ui/ScrollBar'
import Spinner from '@/components/ui/Spinner'
import Tooltip from '@/components/ui/Tooltip'
import { APP_NAME, AVATAR_URL } from '@/constants/app.constant'
import NotificationChannels from '@/constants/notification-channel.enum'
import { ROUTES_ENUM } from '@/routes/route.constant'
import {
  getList,
  updateRead,
  updateReadAll,
  updateReadMany,
  updateSentMany,
} from '@/services/notification.service'
import { useStoreState } from '@/store'
import withHeaderItem from '@/utils/hoc/withHeaderItem'
import { useLocalization } from '@/utils/hooks/useLocalization'
import useResponsive from '@/utils/hooks/useResponsive'
import useThemeClass from '@/utils/hooks/useThemeClass'
import isLastChild from '@/utils/isLastChild'
import classNames from 'classnames'
import dayjs from 'dayjs'
import relativeTime from 'dayjs/plugin/relativeTime'
import { useCallback, useEffect, useRef, useState } from 'react'
import { FaEnvelopeOpen } from 'react-icons/fa'
import { FcAdvertising } from 'react-icons/fc'
import { Link } from 'react-router-dom'
import { Notification as Notify, toast } from '../ui'

dayjs.extend(relativeTime)

type NotificationList = {
  id: string
  creatorId: string
  tenantId?: string
  notificationType: string
  message: string
  date: string
  readed: boolean
}

const notificationHeight = 'h-72'
const notificationInterval = 120000 // 2 minutes

const NotificationToggle = ({
  className,
  unreadCount,
}: {
  className?: string
  unreadCount: number
}) => {
  return (
    <div className={classNames('text-2xl', className)}>
      {unreadCount > 0 ? (
        <Badge
          badgeStyle={{ top: '3px', right: '6px' }}
          content={unreadCount}
          innerClass="py-0 px-1"
        >
          <FcAdvertising />
        </Badge>
      ) : (
        <FcAdvertising />
      )}
    </div>
  )
}

const _Notification = ({ className }: { className?: string }) => {
  const { translate } = useLocalization()

  const [notificationList, setNotificationList] = useState<NotificationList[]>([])
  const [unreadNotificationCount, setUnreadNotificationCount] = useState(0)
  const [loading, setLoading] = useState(false)

  // Aynı bildirimin sekme ömrü boyunca ikinci kez toast/desktop olarak
  // gösterilmesini engeller.
  const pushedIds = useRef(new Set<string>())
  const listLoaded = useRef(false)

  const { bgTheme } = useThemeClass()
  const { larger } = useResponsive()

  const direction = useStoreState((state) => state.theme.direction)
  const tabHasFocus = useStoreState((a) => a.base.common.tabHasFocus)
  const tabHasFocusRef = useRef(tabHasFocus)
  useEffect(() => {
    tabHasFocusRef.current = tabHasFocus
  }, [tabHasFocus])

  const getUnreadCount = useCallback(async () => {
    const resp = await getList({
      channels: [NotificationChannels.UiActivity],
      isListRequest: false,
      isRead: false,
      maxResultCount: 1,
    })
    setUnreadNotificationCount(resp.data?.totalCount ?? 0)
  }, [])

  const getPushNotifications = useCallback(async () => {
    const desktopGranted =
      'Notification' in window && window.Notification.permission === 'granted'

    const channels = [NotificationChannels.UiToast]
    if (desktopGranted) channels.push(NotificationChannels.Desktop)

    const resp = await getList({
      channels,
      isListRequest: false,
      isSent: false,
      maxResultCount: 1000,
    })

    const pending = (resp.data.items ?? []).filter(
      (a) => !a.isSent && !pushedIds.current.has(a.id),
    )
    if (pending.length === 0) {
      return
    }
    pending.forEach((a) => pushedIds.current.add(a.id))

    for (const notification of pending) {
      if (notification.notificationChannel === NotificationChannels.UiToast) {
        toast.push(
          <Notify type="success" duration={0} closable={true}>
            {notification.message}
          </Notify>,
          { placement: 'bottom-end' },
        )
        continue
      }

      const title = notification.notificationType || APP_NAME
      const options: NotificationOptions = {
        body: notification.message,
        dir: 'ltr',
        requireInteraction: true,
      }

      if ('serviceWorker' in navigator && navigator.serviceWorker.controller) {
        const reg = await navigator.serviceWorker.ready
        await reg.showNotification(title, options)
      } else {
        new window.Notification(title, options)
      }
    }

    const processedIds = pending.map((a) => a.id)
    await updateSentMany(processedIds, true)
    await updateReadMany(processedIds, true)
  }, [])

  useEffect(() => {
    if ('Notification' in window && window.Notification.permission === 'default') {
      window.Notification.requestPermission()
    }

    const poll = () => {
      getUnreadCount()
      getPushNotifications()
    }

    poll()
    const intervalId = setInterval(() => {
      if (tabHasFocusRef.current) {
        poll()
      }
    }, notificationInterval)

    return () => clearInterval(intervalId)
  }, [getUnreadCount, getPushNotifications])

  const onNotificationOpen = useCallback(async () => {
    const currentUnread = notificationList.filter((a) => !a.readed).length
    if (listLoaded.current && currentUnread === unreadNotificationCount) {
      return
    }

    setLoading(true)
    try {
      const resp = await getList({
        channels: [NotificationChannels.UiActivity],
        isListRequest: false,
        maxResultCount: 1000,
      })
      const items = resp.data.items ?? []
      if (items.length > 0) {
        await updateSentMany(
          items.map((notification) => notification.id),
          true,
        )
      }

      setNotificationList(
        items.map((a) => ({
          id: a.id,
          notificationType: a.notificationType,
          date: a.creationTime.toLocaleString(),
          message: a.message,
          creatorId: a.creatorId,
          tenantId: a.tenantId,
          readed: a.isRead,
        })) as NotificationList[],
      )
      listLoaded.current = true
    } finally {
      setLoading(false)
    }
  }, [notificationList, unreadNotificationCount])

  const onMarkAllAsRead = useCallback(async () => {
    await updateReadAll(NotificationChannels.UiActivity, true)

    setNotificationList((list) => list.map((item) => ({ ...item, readed: true })))
    setUnreadNotificationCount(0)
  }, [])

  const onMarkAsRead = useCallback(
    async (id: string) => {
      const target = notificationList.find((item) => item.id === id)
      if (!target || target.readed) {
        return
      }

      await updateRead(id, true)

      setNotificationList((list) =>
        list.map((item) => (item.id === id ? { ...item, readed: true } : item)),
      )
      setUnreadNotificationCount((count) => Math.max(0, count - 1))
    },
    [notificationList],
  )

  const noResult = !loading && listLoaded.current && notificationList.length === 0

  return (
    <Tooltip title={translate('::App.Notifications')}>
      <Dropdown
        renderTitle={
          <NotificationToggle unreadCount={unreadNotificationCount} className={className} />
        }
        menuClass="p-0 min-w-[280px] md:min-w-[340px]"
        placement={larger.md ? 'bottom-end' : 'bottom-center'}
        onOpen={onNotificationOpen}
      >
        <Dropdown.Item variant="header">
          <div className="border-b border-gray-200 dark:border-gray-600 px-4 py-2 flex items-center justify-between">
            <h6>{translate('::Abp.Identity.ActivityLogs.Notifications')}</h6>
            <Tooltip title={translate('::Abp.Identity.ActivityLogs.MarkAllRead')}>
              <Button
                variant="plain"
                shape="circle"
                size="sm"
                icon={<FaEnvelopeOpen className="text-xl" />}
                onClick={onMarkAllAsRead}
              />
            </Tooltip>
          </div>
        </Dropdown.Item>
        <div className={classNames('overflow-y-auto', notificationHeight)}>
          <ScrollBar direction={direction}>
            {notificationList.map((item, index) => (
              <div
                key={item.id}
                className={`relative flex px-4 py-4 cursor-pointer hover:bg-gray-50 active:bg-gray-100 dark:hover:bg-black dark:hover:bg-opacity-20  ${
                  !isLastChild(notificationList, index)
                    ? 'border-b border-gray-200 dark:border-gray-600'
                    : ''
                }`}
                onClick={() => onMarkAsRead(item.id)}
              >
                <div>
                  <Avatar shape="circle" src={AVATAR_URL(item.creatorId, item.tenantId)} />
                </div>
                <div className="ltr:ml-3 rtl:mr-3">
                  <div>
                    {item.notificationType && (
                      <span className="font-semibold heading-text">{item.notificationType} </span>
                    )}
                    <div>{item.message}</div>
                  </div>
                  <span className="text-xs">{dayjs(item.date).fromNow()}</span>
                </div>
                <Badge
                  className="absolute top-4 ltr:right-4 rtl:left-4 mt-1.5"
                  innerClass={`${item.readed ? 'bg-gray-300' : bgTheme} `}
                />
              </div>
            ))}
            {loading && (
              <div className={classNames('flex items-center justify-center', notificationHeight)}>
                <Spinner size={40} />
              </div>
            )}
            {noResult && (
              <div className={classNames('flex items-center justify-center', notificationHeight)}>
                <div className="text-center">
                  <img
                    className="mx-auto mb-2 max-w-[150px]"
                    src="/img/others/no-notification.png"
                    alt="no-notification"
                  />
                  <h6 className="font-semibold">No notifications!</h6>
                  <p className="mt-1">Please Try again later</p>
                </div>
              </div>
            )}
          </ScrollBar>
        </div>
        <Dropdown.Item variant="header">
          <div className="flex justify-center border-t border-gray-200 dark:border-gray-600 px-4 py-2">
            <Link
              to={ROUTES_ENUM.protected.admin.activityLog}
              className="font-semibold cursor-pointer p-2 px-3 text-gray-600 hover:text-gray-900 dark:text-gray-200 dark:hover:text-white"
            >
              {translate('::Abp.Identity.ActivityLogs.ViewAllActivity')}
            </Link>
          </div>
        </Dropdown.Item>
      </Dropdown>
    </Tooltip>
  )
}

const Notification = withHeaderItem(_Notification)

export default Notification