import type { FC } from 'react'
import React from 'react'
import useSWR from 'swr'
import { useTranslation } from 'react-i18next'
import { useContext } from 'use-context-selector'
import VarReferencePicker from '../_base/components/variable/var-reference-picker'
import OutputVars, { VarItem } from '../_base/components/output-vars'
import Split from '../_base/components/split'
import { useNodeHelpLink } from '../_base/hooks/use-node-help-link'
import useConfig from './use-config'
import type { DocExtractorNodeType } from './types'
import { fetchSupportFileTypes } from '@/service/datasets'
import Field from '@/app/components/workflow/nodes/_base/components/field'
import { BlockEnum, type NodePanelProps } from '@/app/components/workflow/types'
import I18n from '@/context/i18n'
import { LanguagesSupported } from '@/i18n/language'

const i18nPrefix = 'workflow.nodes.docExtractor'

const Panel: FC<NodePanelProps<DocExtractorNodeType>> = ({
  id,
  data,
}) => {
  const { t } = useTranslation()
  const { locale } = useContext(I18n)
  const link = useNodeHelpLink(BlockEnum.DocExtractor)
  const { data: supportFileTypesResponse } = useSWR({ url: '/files/support-type' }, fetchSupportFileTypes)
  const supportTypes = supportFileTypesResponse?.allowed_extensions || []
  const supportTypesShowNames = (() => {
    const extensionMap: { [key: string]: string } = {
      md: 'markdown',
      pptx: 'pptx',
      htm: 'html',
      xlsx: 'xlsx',
      docx: 'docx',
    }

    return [...supportTypes]
      .map(item => extensionMap[item] || item) // map to standardized extension
      .map(item => item.toLowerCase()) // convert to lower case
      .filter((item, index, self) => self.indexOf(item) === index) // remove duplicates
      .join(locale !== LanguagesSupported[1] ? ', ' : '、 ')
  })()
  const {
    readOnly,
    inputs,
    handleVarChanges,
    filterVar,
  } = useConfig(id, data)

  return (
    <div className='mt-2'>
      <div className='px-4 pb-4 space-y-4'>
        <Field
          title={t(`${i18nPrefix}.inputVar`)}
        >
          <>
            <VarReferencePicker
              readonly={readOnly}
              nodeId={id}
              isShowNodeName
              value={inputs.variable_selector || []}
              onChange={handleVarChanges}
              filterVar={filterVar}
              typePlaceHolder='File | Array[File]'
            />
            <div className='mt-1 py-0.5 text-text-tertiary body-xs-regular'>
              {t(`${i18nPrefix}.supportFileTypes`, { types: supportTypesShowNames })}
              <a className='text-text-accent' href={link} target='_blank'>{t(`${i18nPrefix}.learnMore`)}</a>
            </div>
          </>
        </Field>
      </div>
      <Split />
      <div className='px-4 pt-4 pb-2'>
        <OutputVars>
          <VarItem
            name='text'
            type={inputs.is_array_file ? 'array[string]' : 'string'}
            description={t(`${i18nPrefix}.outputVars.text`)}
          />
        </OutputVars>
      </div>
    </div>
  )
}

export default React.memo(Panel)
