import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
import type { FC } from 'react'
import { Container } from '@/components/shared'
import { Helmet } from 'react-helmet'
import { useLocalization } from '@/utils/hooks/useLocalization'
import { useParams, useLocation } from 'react-router-dom'
import ReportViewer, {
  Callbacks,
  RequestOptions,
} from 'devexpress-reporting-react/dx-report-viewer'
import { ajaxSetup } from '@devexpress/analytics-core/analytics-utils-native'
import { ZoomAutoBy } from 'devexpress-reporting/viewer/constants'
import { APP_NAME } from '@/constants/app.constant'
import { MODE_DARK } from '@/constants/theme.constant'
import { useStoreState } from '@/store'
import { createReportQueryString, createReportUrl } from './reportRouteParams'

const VIEWER_THEME_LINK_ID = 'devexpress-report-viewer-theme'
const DEFAULT_REPORT_ZOOM = 1

interface ReportPreviewModel {
  autoFitBy?: ZoomAutoBy
  originalZoom?: number
  zoom?: number
}

interface ReportPreviewContainer {
  reportPreview?: ReportPreviewModel
  ReportPreview?: ReportPreviewModel
  previewModel?: ReportPreviewContainer
  args?: ReportPreviewContainer
  sender?: ReportPreviewContainer & {
    GetReportPreview?: () => ReportPreviewModel
  }
}

const getViewerClassName = (isDarkMode: boolean) =>
  [
    'dx-viewport',
    'dx-device-desktop',
    'dx-device-generic',
    'dx-theme-generic',
    'dx-theme-generic-typography',
    isDarkMode ? 'dx-color-scheme-dark' : 'dx-color-scheme-light',
    'report-viewer-shell',
    isDarkMode ? 'report-viewer-shell-dark' : '',
  ]
    .filter(Boolean)
    .join(' ')

const loadViewerCss = (isDarkMode: boolean) => {
  const styles = [
    new URL('@devexpress/analytics-core/dist/css/dx-analytics.common.css', import.meta.url).href,
    new URL('devexpress-reporting/dist/css/dx-webdocumentviewer.css', import.meta.url).href,
  ]

  styles.forEach((href) => {
    if (document.querySelector(`link[href="${href}"]`)) return
    const link = document.createElement('link')
    link.rel = 'stylesheet'
    link.href = href
    document.head.appendChild(link)
  })

  const themeHref = isDarkMode
    ? new URL('@devexpress/analytics-core/dist/css/dx-analytics.dark.css', import.meta.url).href
    : new URL('@devexpress/analytics-core/dist/css/dx-analytics.light.css', import.meta.url).href

  let themeLink = document.getElementById(VIEWER_THEME_LINK_ID) as HTMLLinkElement | null
  if (!themeLink) {
    themeLink = document.createElement('link')
    themeLink.id = VIEWER_THEME_LINK_ID
    themeLink.rel = 'stylesheet'
    document.head.appendChild(themeLink)
  }
  if (themeLink.href !== themeHref) {
    themeLink.href = themeHref
  }
}

const DevexpressReportViewer: FC = () => {
  const { translate } = useLocalization()
  const { report, listFormCode, id } = useParams<{
    report: string
    listFormCode: string
    id: string
  }>()
  const location = useLocation()
  const token = useStoreState((state) => state.auth.session.token)
  const themeMode = useStoreState((state) => state.theme.mode)
  const cultureName = useStoreState((state) => state.locale.currentLang)
  const configCultureName = useStoreState(
    (state) => state.abpConfig.config?.localization.currentCulture.cultureName,
  )
  const [configuredRequestKey, setConfiguredRequestKey] = useState<string>()
  const previewModelRef = useRef<ReportPreviewModel>()
  const isDarkMode = themeMode === MODE_DARK
  const reportCultureName = cultureName || configCultureName
  const requestConfigKey = `${token ?? ''}\u0000${reportCultureName ?? ''}`

  const getReportPreview = useCallback(
    (eventOrModel?: ReportPreviewContainer | ReportPreviewModel) => {
      const event = eventOrModel as ReportPreviewContainer | undefined
      const eventArgs = event?.args
      const sender = event?.sender
      const previewModel = event?.previewModel
      const candidates = [
        eventArgs?.reportPreview,
        eventArgs?.ReportPreview,
        eventArgs?.previewModel?.reportPreview,
        event?.reportPreview,
        event?.ReportPreview,
        previewModel?.reportPreview,
        sender?.GetReportPreview?.(),
        sender?.previewModel?.reportPreview,
        eventOrModel as ReportPreviewModel | undefined,
        previewModelRef.current,
      ]

      return candidates.find(
        (candidate) =>
          candidate &&
          ('zoom' in candidate || 'originalZoom' in candidate || 'autoFitBy' in candidate),
      )
    },
    [],
  )

  const setDefaultZoom = useCallback(
    (eventOrModel?: ReportPreviewContainer | ReportPreviewModel) => {
      const preview = getReportPreview(eventOrModel)
      if (!preview) return

      previewModelRef.current = preview
      preview.autoFitBy = ZoomAutoBy.None
      preview.originalZoom = DEFAULT_REPORT_ZOOM
      preview.zoom = DEFAULT_REPORT_ZOOM
    },
    [getReportPreview],
  )

  useEffect(() => {
    loadViewerCss(isDarkMode)
  }, [isDarkMode])

  useEffect(() => {
    const nextHeaders = { ...(ajaxSetup.ajaxSettings.headers ?? {}) }
    delete nextHeaders.Authorization
    delete nextHeaders['Accept-Language']

    ajaxSetup.ajaxSettings.headers = {
      ...nextHeaders,
      ...(token ? { Authorization: `Bearer ${token}` } : {}),
      ...(reportCultureName ? { 'Accept-Language': reportCultureName } : {}),
    }
    setConfiguredRequestKey(requestConfigKey)
  }, [token, reportCultureName, requestConfigKey])

  const reportUrlWithParams = useMemo(() => {
    const searchParams = new URLSearchParams(location.search)
    if (reportCultureName) {
      searchParams.set('cultureName', reportCultureName)
    }

    const search = createReportQueryString(searchParams)
    return createReportUrl({ report, id, listFormCode }, search ? `?${search}` : '')
  }, [report, id, listFormCode, location.search, reportCultureName])

  if (!reportUrlWithParams) return null

  return (
    <Container className={getViewerClassName(isDarkMode)}>
      <Helmet
        titleTemplate={`%s | ${APP_NAME}`}
        title={translate('::App.Reports')}
        defaultTitle={APP_NAME}
      />

      {configuredRequestKey === requestConfigKey && (
        <ReportViewer key={reportUrlWithParams} reportUrl={reportUrlWithParams}>
          <Callbacks BeforeRender={setDefaultZoom} DocumentReady={setDefaultZoom} />
          <RequestOptions host={import.meta.env.VITE_API_URL} invokeAction="/DXXRDV" />
        </ReportViewer>
      )}
    </Container>
  )
}

export default DevexpressReportViewer