'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 { checkWatercrawlTaskStatus, createWatercrawlTask } 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 STEP_CONTROL_FOLD_OPTIONS: Record<Step, number> = {
  [Step.init]: 0,
  [Step.running]: 1,
  [Step.finished]: 2,
}
const WaterCrawl: FC<Props> = ({
  onPreview,
  checkedCrawlResult,
  onCheckedCrawlResultChange,
  onJobIdChange,
  crawlOptions,
  onCrawlOptionsChange,
}) => {
  const { t } = useTranslation()
  const [step, setStep] = useState<Step>(Step.init)
  const controlFoldOptions = STEP_CONTROL_FOLD_OPTIONS[step]
  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): Promise<any> => {
      try {
        const res = (await checkWatercrawlTaskStatus(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 === 'error' || !res.status) {
          // can't get the error message from the watercrawl api
          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 (error: unknown) {
        let errorMessage = ''
        const maybeErrorWithJson = error as {
          json?: () => Promise<unknown>
          message?: unknown
        } | null
        if (maybeErrorWithJson?.json) {
          try {
            const errorBody = (await maybeErrorWithJson.json()) as {
              message?: unknown
            } | null
            if (typeof errorBody?.message === 'string') errorMessage = errorBody.message
          } catch {}
        }
        if (!errorMessage && typeof maybeErrorWithJson?.message === 'string')
          errorMessage = maybeErrorWithJson.message
        return {
          isError: true,
          errorMessage,
          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)
      try {
        const passToServerCrawlOptions: any = {
          ...crawlOptions,
        }
        if (crawlOptions.max_depth === '') delete passToServerCrawlOptions.max_depth
        const res = (await createWatercrawlTask({
          url,
          options: passToServerCrawlOptions,
        })) as any
        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)
      }
    },
    [checkValid, crawlOptions, onCheckedCrawlResultChange, onJobIdChange, t, waitForCrawlFinished],
  )
  return (
    <div>
      <Header
        onClickConfiguration={handleSetting}
        title={t(($) => $[`${I18N_PREFIX}.watercrawlTitle`], { ns: 'datasetCreation' })}
        buttonText={t(($) => $[`${I18N_PREFIX}.configureWatercrawl`], { ns: 'datasetCreation' })}
        docTitle={t(($) => $[`${I18N_PREFIX}.watercrawlDoc`], { ns: 'datasetCreation' })}
        docLink="https://docs.watercrawl.dev/"
      />
      <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(WaterCrawl)