import type { UseMutateAsyncFunction } from '@tanstack/react-query'
import type { ChangeEvent } from 'react'
import type { FileEntity } from '@/app/components/datasets/common/image-uploader/types'
import type {
  Attachment,
  ExternalKnowledgeBaseHitTestingRequest,
  ExternalKnowledgeBaseHitTestingResponse,
  HitTestingRequest,
  HitTestingResponse,
  Query,
} from '@/models/datasets'
import type { RetrievalConfig } from '@/types/app'
import { Button } from '@langgenius/dify-ui/button'
import { cn } from '@langgenius/dify-ui/cn'
import {
  RiEqualizer2Line,
  RiPlayCircleLine,
} from '@remixicon/react'
import * as React from 'react'
import { useCallback, useMemo, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { v4 as uuid4 } from 'uuid'
import ImageUploaderInRetrievalTesting from '@/app/components/datasets/common/image-uploader/image-uploader-in-retrieval-testing'
import { getIcon } from '@/app/components/datasets/common/retrieval-method-info'
import ModifyExternalRetrievalModal from '@/app/components/datasets/hit-testing/modify-external-retrieval-modal'
import { useDatasetDetailContextWithSelector } from '@/context/dataset-detail'
import { RETRIEVE_METHOD } from '@/types/app'
import Textarea from './textarea'

type QueryInputProps = {
  onUpdateList: () => void
  setHitResult: (res: HitTestingResponse) => void
  setExternalHitResult: (res: ExternalKnowledgeBaseHitTestingResponse) => void
  loading: boolean
  queries: Query[]
  setQueries: (v: Query[]) => void
  isExternal?: boolean
  onClickRetrievalMethod: () => void
  retrievalConfig: RetrievalConfig
  isEconomy: boolean
  onSubmit?: () => void
  hitTestingMutation: UseMutateAsyncFunction<HitTestingResponse, Error, HitTestingRequest, unknown>
  externalKnowledgeBaseHitTestingMutation: UseMutateAsyncFunction<
    ExternalKnowledgeBaseHitTestingResponse,
    Error,
    ExternalKnowledgeBaseHitTestingRequest,
    unknown
  >
}

const QueryInput = ({
  onUpdateList,
  setHitResult,
  setExternalHitResult,
  loading,
  queries,
  setQueries,
  isExternal = false,
  onClickRetrievalMethod,
  retrievalConfig,
  isEconomy,
  onSubmit: _onSubmit,
  hitTestingMutation,
  externalKnowledgeBaseHitTestingMutation,
}: QueryInputProps) => {
  const { t } = useTranslation()
  const isMultimodal = useDatasetDetailContextWithSelector(s => !!s.dataset?.is_multimodal)
  const [isSettingsOpen, setIsSettingsOpen] = useState(false)
  const [externalRetrievalSettings, setExternalRetrievalSettings] = useState({
    top_k: 4,
    score_threshold: 0.5,
    score_threshold_enabled: false,
  })

  const text = useMemo(() => {
    return queries.find(query => query.content_type === 'text_query')?.content ?? ''
  }, [queries])

  const images = useMemo(() => {
    const imageQueries = queries
      .filter(query => query.content_type === 'image_query')
      .map(query => query.file_info)
      .filter(Boolean) as Attachment[]
    return imageQueries.map(item => ({
      id: uuid4(),
      name: item.name,
      size: item.size,
      mimeType: item.mime_type,
      extension: item.extension,
      sourceUrl: item.source_url,
      uploadedId: item.id,
      progress: 100,
    })) || []
  }, [queries])

  const isAllUploaded = useMemo(() => {
    return images.every(image => !!image.uploadedId)
  }, [images])

  const handleSaveExternalRetrievalSettings = useCallback((data: {
    top_k: number
    score_threshold: number
    score_threshold_enabled: boolean
  }) => {
    setExternalRetrievalSettings(data)
    setIsSettingsOpen(false)
  }, [])

  const handleTextChange = useCallback((event: ChangeEvent<HTMLTextAreaElement>) => {
    const newQueries = [...queries]
    const textQuery = newQueries.find(query => query.content_type === 'text_query')
    if (!textQuery) {
      newQueries.push({
        content: event.target.value,
        content_type: 'text_query',
        file_info: null,
      })
    }
    else {
      textQuery.content = event.target.value
    }
    setQueries(newQueries)
  }, [queries, setQueries])

  const handleImageChange = useCallback((files: FileEntity[]) => {
    let newQueries = [...queries]
    newQueries = newQueries.filter(query => query.content_type !== 'image_query')
    files.forEach((file) => {
      newQueries.push({
        content: file.sourceUrl || '',
        content_type: 'image_query',
        file_info: {
          id: file.uploadedId || '',
          mime_type: file.mimeType,
          source_url: file.sourceUrl || '',
          name: file.name,
          size: file.size,
          extension: file.extension,
        },
      })
    })
    setQueries(newQueries)
  }, [queries, setQueries])

  const onSubmit = useCallback(async () => {
    await hitTestingMutation({
      query: text,
      attachment_ids: images.map(image => image.uploadedId),
      retrieval_model: {
        ...retrievalConfig,
        search_method: isEconomy ? RETRIEVE_METHOD.keywordSearch : retrievalConfig.search_method,
      },
    }, {
      onSuccess: (data) => {
        setHitResult(data)
        onUpdateList?.()
        if (_onSubmit)
          _onSubmit()
      },
    })
  }, [text, retrievalConfig, isEconomy, hitTestingMutation, onUpdateList, _onSubmit, images, setHitResult])

  const externalRetrievalTestingOnSubmit = useCallback(async () => {
    await externalKnowledgeBaseHitTestingMutation({
      query: text,
      external_retrieval_model: {
        top_k: externalRetrievalSettings.top_k,
        score_threshold: externalRetrievalSettings.score_threshold,
        score_threshold_enabled: externalRetrievalSettings.score_threshold_enabled,
      },
    }, {
      onSuccess: (data) => {
        setExternalHitResult(data)
        onUpdateList?.()
      },
    })
  }, [text, externalRetrievalSettings, externalKnowledgeBaseHitTestingMutation, onUpdateList, setExternalHitResult])

  const retrievalMethod = isEconomy ? RETRIEVE_METHOD.keywordSearch : retrievalConfig.search_method
  const icon = <img className="size-3.5 text-util-colors-purple-purple-600" src={getIcon(retrievalMethod)} alt="" />
  const TextAreaComp = useMemo(() => {
    return (
      <Textarea
        text={text}
        handleTextChange={handleTextChange}
      />
    )
  }, [text, handleTextChange])
  const ActionButtonComp = useMemo(() => {
    return (
      <Button
        onClick={isExternal ? externalRetrievalTestingOnSubmit : onSubmit}
        variant="primary"
        loading={loading}
        disabled={(text.length === 0 && images.length === 0) || text.length > 200 || (images.length > 0 && !isAllUploaded)}
        className="w-[88px]"
      >
        <RiPlayCircleLine className="mr-1 size-4" />
        {t('input.testing', { ns: 'datasetHitTesting' })}
      </Button>
    )
  }, [isExternal, externalRetrievalTestingOnSubmit, onSubmit, text, loading, t, images, isAllUploaded])

  return (
    <div className={cn('relative flex h-80 shrink-0 flex-col overflow-hidden rounded-xl bg-linear-to-r from-components-input-border-active-prompt-1 to-components-input-border-active-prompt-2 p-0.5 shadow-xs')}>
      <div className="flex h-full flex-col overflow-hidden rounded-[10px] bg-background-section-burn">
        <div className="relative flex shrink-0 items-center justify-between p-1.5 pb-1 pl-3">
          <span className="system-sm-semibold-uppercase text-text-secondary">
            {t('input.title', { ns: 'datasetHitTesting' })}
          </span>
          {isExternal
            ? (
                <Button
                  variant="secondary"
                  size="small"
                  onClick={() => setIsSettingsOpen(!isSettingsOpen)}
                >
                  <RiEqualizer2Line className="size-3.5 text-components-button-secondary-text" />
                  <div className="flex items-center justify-center gap-1 px-[3px]">
                    <span className="system-xs-medium text-components-button-secondary-text">{t('settingTitle', { ns: 'datasetHitTesting' })}</span>
                  </div>
                </Button>
              )
            : (
                <div
                  onClick={onClickRetrievalMethod}
                  className="flex h-7 cursor-pointer items-center space-x-0.5 rounded-lg border-[0.5px] border-components-button-secondary-bg bg-components-button-secondary-bg px-1.5 shadow-xs backdrop-blur-[5px] hover:bg-components-button-secondary-bg-hover"
                >
                  {icon}
                  <div className="text-xs font-medium text-text-secondary uppercase">{t(`retrieval.${retrievalMethod}.title`, { ns: 'dataset' })}</div>
                  <RiEqualizer2Line className="size-4 text-components-menu-item-text"></RiEqualizer2Line>
                </div>
              )}
          {
            isSettingsOpen && (
              <ModifyExternalRetrievalModal
                onClose={() => setIsSettingsOpen(false)}
                onSave={handleSaveExternalRetrievalSettings}
                initialTopK={externalRetrievalSettings.top_k}
                initialScoreThreshold={externalRetrievalSettings.score_threshold}
                initialScoreThresholdEnabled={externalRetrievalSettings.score_threshold_enabled}
              />
            )
          }
        </div>
        <ImageUploaderInRetrievalTesting
          textArea={TextAreaComp}
          actionButton={ActionButtonComp}
          onChange={handleImageChange}
          value={images}
          showUploader={isMultimodal}
          className="grow"
          actionAreaClassName="px-4 py-2 shrink-0 bg-background-default"
        />
      </div>
    </div>
  )
}

export default QueryInput
