'use client'
import type { FC } from 'react'
import type { CrawlOptions, CrawlResultItem } from '@/models/datasets'
import { toast } from '@langgenius/dify-ui/toast'
import * as React from 'react'
import { useCallback, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { ACCOUNT_SETTING_TAB } from '@/app/components/header/account-setting/constants'
import { useIntegrationsSetting } from '@/app/components/header/account-setting/use-integrations-setting'
import { checkJinaReaderTaskStatus, createJinaReaderTask } from '@/service/datasets'
import { sleep } from '@/utils'
import CrawledResult from '../base/crawled-result'
import Crawling from '../base/crawling'
import ErrorMessage from '../base/error-message'
import Header from '../base/header'
import OptionsWrap from '../base/options-wrap'
import UrlInput from '../base/url-input'
import Options from './options'

const ERROR_I18N_PREFIX = 'errorMsg'
const I18N_PREFIX = 'stepOne.website'
type Props = Readonly<{
  onPreview: (payload: CrawlResultItem) => void
  checkedCrawlResult: CrawlResultItem[]
  onCheckedCrawlResultChange: (payload: CrawlResultItem[]) => void
  onJobIdChange: (jobId: string) => void
  crawlOptions: CrawlOptions
  onCrawlOptionsChange: (payload: CrawlOptions) => void
}>
const Step = {
  init: 'init',
  running: 'running',
  finished: 'finished',
} as const
type Step = (typeof Step)[keyof typeof Step]
const JinaReader: FC<Props> = ({
  onPreview,
  checkedCrawlResult,
  onCheckedCrawlResultChange,
  onJobIdChange,
  crawlOptions,
  onCrawlOptionsChange,
}) => {
  const { t } = useTranslation()
  const [step, setStep] = useState<Step>(Step.init)
  const [controlFoldOptions, setControlFoldOptions] = useState<number>(0)
  const openIntegrationsSetting = useIntegrationsSetting()
  const handleSetting = useCallback(() => {
    openIntegrationsSetting({
      payload: ACCOUNT_SETTING_TAB.DATA_SOURCE,
    })
  }, [openIntegrationsSetting])
  const checkValid = useCallback(
    (url: string) => {
      let errorMsg = ''
      if (!url) {
        errorMsg = t(($) => $[`${ERROR_I18N_PREFIX}.fieldRequired`], {
          ns: 'common',
          field: 'url',
        })
      }
      if (!errorMsg && !(url.startsWith('http://') || url.startsWith('https://')))
        errorMsg = t(($) => $[`${ERROR_I18N_PREFIX}.urlError`], { ns: 'common' })
      if (
        !errorMsg &&
        (crawlOptions.limit === null ||
          crawlOptions.limit === undefined ||
          crawlOptions.limit === '')
      ) {
        errorMsg = t(($) => $[`${ERROR_I18N_PREFIX}.fieldRequired`], {
          ns: 'common',
          field: t(($) => $[`${I18N_PREFIX}.limit`], { ns: 'datasetCreation' }),
        })
      }
      return {
        isValid: !errorMsg,
        errorMsg,
      }
    },
    [crawlOptions, t],
  )
  const isInit = step === Step.init
  const isCrawlFinished = step === Step.finished
  const isRunning = step === Step.running
  const [crawlResult, setCrawlResult] = useState<
    | {
        current: number
        total: number
        data: CrawlResultItem[]
        time_consuming: number | string
      }
    | undefined
  >(undefined)
  const [crawlErrorMessage, setCrawlErrorMessage] = useState('')
  const showError = isCrawlFinished && crawlErrorMessage
  const waitForCrawlFinished = useCallback(
    async (jobId: string) => {
      try {
        const res = (await checkJinaReaderTaskStatus(jobId)) as any
        if (res.status === 'completed') {
          return {
            isError: false,
            data: {
              ...res,
              total: Math.min(res.total, Number.parseFloat(crawlOptions.limit as string)),
            },
          }
        }
        if (res.status === 'failed' || !res.status) {
          return {
            isError: true,
            errorMessage: res.message,
            data: {
              data: [],
            },
          }
        }
        // update the progress
        setCrawlResult({
          ...res,
          total: Math.min(res.total, Number.parseFloat(crawlOptions.limit as string)),
        })
        onCheckedCrawlResultChange(res.data || []) // default select the crawl result
        await sleep(2500)
        return await waitForCrawlFinished(jobId)
      } catch (e: any) {
        const errorBody = await e.json()
        return {
          isError: true,
          errorMessage: errorBody.message,
          data: {
            data: [],
          },
        }
      }
    },
    [crawlOptions.limit, onCheckedCrawlResultChange],
  )
  const handleRun = useCallback(
    async (url: string) => {
      const { isValid, errorMsg } = checkValid(url)
      if (!isValid) {
        toast.error(errorMsg!)
        return
      }
      setStep(Step.running)
      // fold the options panel when the step leaves `init`,
      // previously synced via a setState in an effect on `step`
      setControlFoldOptions(Date.now())
      try {
        const startTime = Date.now()
        const res = (await createJinaReaderTask({
          url,
          options: crawlOptions,
        })) as any
        if (res.data) {
          const { title, content, description, url } = res.data
          const data = {
            current: 1,
            total: 1,
            data: [
              {
                title,
                markdown: content,
                description,
                source_url: url,
              },
            ],
            time_consuming: (Date.now() - startTime) / 1000,
          }
          setCrawlResult(data)
          onCheckedCrawlResultChange(data.data || [])
          setCrawlErrorMessage('')
        } else if (res.job_id) {
          const jobId = res.job_id
          onJobIdChange(jobId)
          const { isError, data, errorMessage } = await waitForCrawlFinished(jobId)
          if (isError) {
            setCrawlErrorMessage(
              errorMessage || t(($) => $[`${I18N_PREFIX}.unknownError`], { ns: 'datasetCreation' }),
            )
          } else {
            setCrawlResult(data)
            onCheckedCrawlResultChange(data.data || []) // default select the crawl result
            setCrawlErrorMessage('')
          }
        }
      } catch (e) {
        setCrawlErrorMessage(t(($) => $[`${I18N_PREFIX}.unknownError`], { ns: 'datasetCreation' })!)
        console.log(e)
      } finally {
        setStep(Step.finished)
        setControlFoldOptions(Date.now())
      }
    },
    [checkValid, crawlOptions, onCheckedCrawlResultChange, onJobIdChange, t, waitForCrawlFinished],
  )
  return (
    <div>
      <Header
        onClickConfiguration={handleSetting}
        title={t(($) => $[`${I18N_PREFIX}.jinaReaderTitle`], { ns: 'datasetCreation' })}
        buttonText={t(($) => $[`${I18N_PREFIX}.configureJinaReader`], { ns: 'datasetCreation' })}
        docTitle={t(($) => $[`${I18N_PREFIX}.jinaReaderDoc`], { ns: 'datasetCreation' })}
        docLink="https://jina.ai/reader"
      />
      <div className="mt-2 rounded-xl border border-components-panel-border bg-background-default-subtle p-4 pb-0">
        <UrlInput onRun={handleRun} isRunning={isRunning} />
        <OptionsWrap className="mt-4" controlFoldOptions={controlFoldOptions}>
          <Options className="mt-2" payload={crawlOptions} onChange={onCrawlOptionsChange} />
        </OptionsWrap>

        {!isInit && (
          <div className="relative left-[-16px] mt-3 w-[calc(100%+32px)] rounded-b-xl">
            {isRunning && (
              <Crawling
                className="mt-2"
                crawledNum={crawlResult?.current || 0}
                totalNum={
                  crawlResult?.total || Number.parseFloat(crawlOptions.limit as string) || 0
                }
              />
            )}
            {showError && (
              <ErrorMessage
                className="rounded-b-xl"
                title={t(($) => $[`${I18N_PREFIX}.exceptionErrorTitle`], { ns: 'datasetCreation' })}
                errorMsg={crawlErrorMessage}
              />
            )}
            {isCrawlFinished && !showError && (
              <CrawledResult
                className="mb-2"
                list={crawlResult?.data || []}
                checkedList={checkedCrawlResult}
                onSelectedChange={onCheckedCrawlResultChange}
                onPreview={onPreview}
                usedTime={Number.parseFloat(crawlResult?.time_consuming as string) || 0}
              />
            )}
          </div>
        )}
      </div>
    </div>
  )
}
export default React.memo(JinaReader)