import type { ChatConfig, ChatItem, Feedback } from '../types'
/* oxlint-disable typescript/no-explicit-any */
import type { InputValueTypes } from '@/app/components/share/text-generation/types'
import type { Locale } from '@/i18n-config'
import type { AppData, ConversationItem } from '@/models/share'
import { toast } from '@langgenius/dify-ui/toast'
import { noop } from 'es-toolkit/function'
import { produce } from 'immer'
import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { useConversationIdInfo } from '@/app/components/base/chat/storage'
import { addFileInfos, sortAgentSorts } from '@/app/components/tools/utils'
import { InputVarType } from '@/app/components/workflow/types'
import { useWebAppStore } from '@/context/web-app-context'
import { changeLanguage } from '@/i18n-config/client'
import { AppSourceType, updateFeedback } from '@/service/share'
import {
  useInvalidateShareConversations,
  useShareChatList,
  useShareConversationName,
  useShareConversations,
} from '@/service/use-share'
import { useGetTryAppInfo, useGetTryAppParams } from '@/service/use-try-app'
import { TransferMethod } from '@/types/app'
import { getProcessedFilesFromResponse } from '../../file-uploader/utils'
import {
  buildChatItemTree,
  getProcessedInputsFromUrlParams,
  getProcessedSystemVariablesFromUrlParams,
  getProcessedUserVariablesFromUrlParams,
} from '../utils'

function getFormattedChatList(messages: any[]) {
  const newChatList: ChatItem[] = []
  messages.forEach((item) => {
    const questionFiles =
      item.message_files?.filter((file: any) => file.belongs_to === 'user') || []
    newChatList.push({
      id: `question-${item.id}`,
      content: item.query,
      isAnswer: false,
      message_files: getProcessedFilesFromResponse(
        questionFiles.map((item: any) => ({ ...item, related_id: item.id })),
      ),
      parentMessageId: item.parent_message_id || undefined,
    })
    const answerFiles =
      item.message_files?.filter((file: any) => file.belongs_to === 'assistant') || []
    newChatList.push({
      id: item.id,
      content: item.answer,
      agent_thoughts: addFileInfos(
        item.agent_thoughts ? sortAgentSorts(item.agent_thoughts) : item.agent_thoughts,
        item.message_files,
      ),
      feedback: item.feedback,
      isAnswer: true,
      citation: item.retriever_resources,
      reasoningContent: item.metadata?.reasoning,
      reasoningFinished: true,
      message_files: getProcessedFilesFromResponse(
        answerFiles.map((item: any) => ({ ...item, related_id: item.id })),
      ),
      parentMessageId: `question-${item.id}`,
    })
  })
  return newChatList
}
export const useEmbeddedChatbot = (appSourceType: AppSourceType, tryAppId?: string) => {
  const isInstalledApp = false // just can be webapp and try app
  const isTryApp = appSourceType === AppSourceType.tryApp
  const { data: tryAppInfo } = useGetTryAppInfo(isTryApp ? tryAppId! : '')
  const webAppInfo = useWebAppStore((s) => s.appInfo)
  const appInfo = isTryApp ? tryAppInfo : webAppInfo
  const appMeta = useWebAppStore((s) => s.appMeta)
  const { data: tryAppParams } = useGetTryAppParams(isTryApp ? tryAppId! : '')
  const webAppParams = useWebAppStore((s) => s.appParams)
  const appParams = isTryApp ? tryAppParams : webAppParams
  const appId = useMemo(() => {
    return isTryApp ? tryAppId : (appInfo as any)?.app_id
  }, [appInfo, isTryApp, tryAppId])
  const embeddedConversationId = useWebAppStore((s) => s.embeddedConversationId)
  const embeddedUserId = useWebAppStore((s) => s.embeddedUserId)
  const [userId, setUserId] = useState<string>()
  const [conversationId, setConversationId] = useState<string>()
  useEffect(() => {
    if (isTryApp) return
    getProcessedSystemVariablesFromUrlParams().then(({ user_id, conversation_id }) => {
      setUserId(user_id)
      setConversationId(conversation_id)
    })
  }, [])
  useEffect(() => {
    setUserId(embeddedUserId || undefined)
  }, [embeddedUserId])
  useEffect(() => {
    setConversationId(embeddedConversationId || undefined)
  }, [embeddedConversationId])
  useEffect(() => {
    if (isTryApp) return
    const setLanguageFromParams = async () => {
      // Check URL parameters for language override
      const urlParams = new URLSearchParams(window.location.search)
      const localeParam = urlParams.get('locale')
      // Check for encoded system variables
      const systemVariables = await getProcessedSystemVariablesFromUrlParams()
      const localeFromSysVar = systemVariables.locale
      if (localeParam) {
        // If locale parameter exists in URL, use it instead of default
        await changeLanguage(localeParam as Locale)
      } else if (localeFromSysVar) {
        // If locale is set as a system variable, use that
        await changeLanguage(localeFromSysVar)
      } else if ((appInfo as unknown as AppData)?.site?.default_language) {
        // Otherwise use the default from app config
        await changeLanguage((appInfo as unknown as AppData).site?.default_language)
      }
    }
    setLanguageFromParams()
  }, [appInfo])
  const [conversationIdInfo, setConversationIdInfo] = useConversationIdInfo()
  const removeConversationIdInfo = useCallback(
    (appId: string) => {
      setConversationIdInfo((prev) => {
        const newInfo = { ...prev }
        delete newInfo[appId]
        return newInfo
      })
    },
    [setConversationIdInfo],
  )
  const allowResetChat = !conversationId
  const currentConversationId = useMemo(
    () => conversationId || conversationIdInfo?.[appId || '']?.[userId || 'DEFAULT'] || '',
    [appId, conversationIdInfo, userId, conversationId],
  )
  const handleConversationIdInfoChange = useCallback(
    (changeConversationId: string) => {
      if (appId) {
        let prevValue = conversationIdInfo?.[appId || '']
        if (typeof prevValue === 'string') prevValue = {}
        setConversationIdInfo({
          ...conversationIdInfo,
          [appId || '']: {
            ...prevValue,
            [userId || 'DEFAULT']: changeConversationId,
          },
        })
      }
    },
    [appId, conversationIdInfo, setConversationIdInfo, userId],
  )
  const [newConversationId, setNewConversationId] = useState('')
  const chatShouldReloadKey = useMemo(() => {
    if (currentConversationId === newConversationId) return ''
    return currentConversationId
  }, [currentConversationId, newConversationId])
  const { data: appPinnedConversationData } = useShareConversations({
    appSourceType,
    appId,
    pinned: true,
    limit: 100,
  })
  const { data: appConversationData, isLoading: appConversationDataLoading } =
    useShareConversations({
      appSourceType,
      appId,
      pinned: false,
      limit: 100,
    })
  const { data: appChatListData, isLoading: appChatListDataLoading } = useShareChatList({
    conversationId: chatShouldReloadKey,
    appSourceType,
    appId,
  })
  const invalidateShareConversations = useInvalidateShareConversations()
  const [clearChatList, setClearChatList] = useState(false)
  const [isResponding, setIsResponding] = useState(false)
  const appPrevChatList = useMemo(
    () =>
      currentConversationId && appChatListData?.data.length
        ? buildChatItemTree(getFormattedChatList(appChatListData.data))
        : [],
    [appChatListData, currentConversationId],
  )
  const [showNewConversationItemInList, setShowNewConversationItemInList] = useState(false)
  const pinnedConversationList = useMemo(() => {
    return appPinnedConversationData?.data || []
  }, [appPinnedConversationData])
  const { t } = useTranslation()
  const newConversationInputsRef = useRef<Record<string, any>>({})
  const [newConversationInputs, setNewConversationInputs] = useState<Record<string, any>>({})
  const [initInputs, setInitInputs] = useState<Record<string, any>>({})
  const [initUserVariables, setInitUserVariables] = useState<Record<string, any>>({})
  const handleNewConversationInputsChange = useCallback((newInputs: Record<string, any>) => {
    newConversationInputsRef.current = newInputs
    // oxlint-disable-next-line eslint-react/set-state-in-effect
    setNewConversationInputs(newInputs)
  }, [])
  const inputsForms = useMemo(() => {
    return (appParams?.user_input_form || [])
      .filter((item: any) => !item.external_data_tool)
      .map((item: any) => {
        if (item.paragraph) {
          let value = initInputs[item.paragraph.variable]
          if (value && item.paragraph.max_length && value.length > item.paragraph.max_length)
            value = value.slice(0, item.paragraph.max_length)
          return {
            ...item.paragraph,
            default: value || item.default || item.paragraph.default,
            type: 'paragraph',
          }
        }
        if (item.number) {
          const convertedNumber = Number(initInputs[item.number.variable])
          return {
            ...item.number,
            default: convertedNumber || item.default || item.number.default,
            type: 'number',
          }
        }
        if (item.checkbox) {
          const preset = initInputs[item.checkbox.variable] === true
          return {
            ...item.checkbox,
            default: preset || item.default || item.checkbox.default,
            type: 'checkbox',
          }
        }
        if (item.select) {
          const isInputInOptions = item.select.options.includes(initInputs[item.select.variable])
          return {
            ...item.select,
            default:
              (isInputInOptions ? initInputs[item.select.variable] : undefined) ||
              item.select.default,
            type: 'select',
          }
        }
        if (item['file-list']) {
          return {
            ...item['file-list'],
            type: 'file-list',
          }
        }
        if (item.file) {
          return {
            ...item.file,
            type: 'file',
          }
        }
        if (item.json_object) {
          return {
            ...item.json_object,
            type: 'json_object',
          }
        }
        let value = initInputs[item['text-input'].variable]
        if (value && item['text-input'].max_length && value.length > item['text-input'].max_length)
          value = value.slice(0, item['text-input'].max_length)
        return {
          ...item['text-input'],
          default: value || item.default || item['text-input'].default,
          type: 'text-input',
        }
      })
  }, [initInputs, appParams])
  const allInputsHidden = useMemo(() => {
    return inputsForms.length > 0 && inputsForms.every((item) => item.hide === true)
  }, [inputsForms])
  useEffect(() => {
    // init inputs from url params
    ;(async () => {
      if (isTryApp) return
      const inputs = await getProcessedInputsFromUrlParams()
      const userVariables = await getProcessedUserVariablesFromUrlParams()
      setInitInputs(inputs)
      setInitUserVariables(userVariables)
    })()
  }, [])
  useEffect(() => {
    const conversationInputs: Record<string, InputValueTypes> = {}
    inputsForms.forEach((item) => {
      conversationInputs[item.variable] = item.default || null
    })
    handleNewConversationInputsChange(conversationInputs)
  }, [handleNewConversationInputsChange, inputsForms])
  const { data: newConversation } = useShareConversationName(
    {
      conversationId: newConversationId,
      appSourceType,
      appId,
    },
    {
      refetchOnWindowFocus: false,
      enabled: !isTryApp,
    },
  )
  const [originConversationList, setOriginConversationList] = useState<ConversationItem[]>([])
  useEffect(() => {
    if (appConversationData?.data && !appConversationDataLoading)
      // oxlint-disable-next-line eslint-react/set-state-in-effect
      setOriginConversationList(appConversationData?.data)
  }, [appConversationData, appConversationDataLoading])
  const conversationList = useMemo(() => {
    const data = originConversationList.slice()
    if (showNewConversationItemInList && data[0]?.id !== '') {
      data.unshift({
        id: '',
        name: t(($) => $['chat.newChatDefaultName'], { ns: 'share' }),
        inputs: {},
        introduction: '',
      })
    }
    return data
  }, [originConversationList, showNewConversationItemInList, t])
  useEffect(() => {
    if (newConversation) {
      setOriginConversationList(
        produce((draft) => {
          const index = draft.findIndex((item) => item.id === newConversation.id)
          if (index > -1) draft[index] = newConversation
          else draft.unshift(newConversation)
        }),
      )
    }
  }, [newConversation])
  const currentConversationItem = useMemo(() => {
    let conversationItem = conversationList.find((item) => item.id === currentConversationId)
    if (!conversationItem && pinnedConversationList.length)
      conversationItem = pinnedConversationList.find((item) => item.id === currentConversationId)
    return conversationItem
  }, [conversationList, currentConversationId, pinnedConversationList])
  const currentConversationLatestInputs = useMemo(() => {
    if (!currentConversationId || !appChatListData?.data.length)
      return newConversationInputsRef.current || {}
    return appChatListData.data.slice().pop().inputs || {}
  }, [appChatListData, currentConversationId])
  const [currentConversationInputs, setCurrentConversationInputs] = useState<Record<string, any>>(
    currentConversationLatestInputs || {},
  )
  useEffect(() => {
    if (currentConversationItem && !isTryApp)
      // oxlint-disable-next-line eslint-react/set-state-in-effect
      setCurrentConversationInputs(currentConversationLatestInputs || {})
  }, [currentConversationItem, currentConversationLatestInputs])
  const checkInputsRequired = useCallback(
    (silent?: boolean) => {
      if (allInputsHidden) return true
      let hasEmptyInput = ''
      let fileIsUploading = false
      const requiredVars = inputsForms.filter(
        ({ required, type }) => required && type !== InputVarType.checkbox,
      )
      if (requiredVars.length) {
        requiredVars.forEach(({ variable, label, type }) => {
          if (hasEmptyInput) return
          if (fileIsUploading) return
          if (!newConversationInputsRef.current[variable] && !silent)
            hasEmptyInput = label as string
          if (
            (type === InputVarType.singleFile || type === InputVarType.multiFiles) &&
            newConversationInputsRef.current[variable] &&
            !silent
          ) {
            const files = newConversationInputsRef.current[variable]
            if (Array.isArray(files))
              fileIsUploading = files.find(
                (item) => item.transferMethod === TransferMethod.local_file && !item.uploadedId,
              )
            else
              fileIsUploading =
                files.transferMethod === TransferMethod.local_file && !files.uploadedId
          }
        })
      }
      if (hasEmptyInput) {
        toast.error(
          t(($) => $['errorMessage.valueOfVarRequired'], { ns: 'appDebug', key: hasEmptyInput }),
        )
        return false
      }
      if (fileIsUploading) {
        toast.info(t(($) => $['errorMessage.waitForFileUpload'], { ns: 'appDebug' }))
        return
      }
      return true
    },
    [inputsForms, t, allInputsHidden],
  )
  const handleStartChat = useCallback(
    (callback?: () => void) => {
      if (checkInputsRequired()) {
        setShowNewConversationItemInList(true)
        callback?.()
      }
    },
    [setShowNewConversationItemInList, checkInputsRequired],
  )
  const currentChatInstanceRef = useRef<{
    handleStop: () => void
  }>({ handleStop: noop })
  const handleChangeConversation = useCallback(
    (conversationId: string) => {
      currentChatInstanceRef.current.handleStop()
      setNewConversationId('')
      handleConversationIdInfoChange(conversationId)
      if (conversationId) setClearChatList(false)
    },
    [handleConversationIdInfoChange, setClearChatList],
  )
  const handleNewConversation = useCallback(async () => {
    if (isTryApp) {
      setClearChatList(true)
      return
    }
    currentChatInstanceRef.current.handleStop()
    setShowNewConversationItemInList(true)
    handleChangeConversation('')
    handleNewConversationInputsChange(await getProcessedInputsFromUrlParams())
    setClearChatList(true)
  }, [
    isTryApp,
    setShowNewConversationItemInList,
    handleNewConversationInputsChange,
    setClearChatList,
  ])
  const handleNewConversationCompleted = useCallback(
    (newConversationId: string) => {
      setNewConversationId(newConversationId)
      handleConversationIdInfoChange(newConversationId)
      setShowNewConversationItemInList(false)
      invalidateShareConversations()
    },
    [handleConversationIdInfoChange, invalidateShareConversations],
  )
  const handleFeedback = useCallback(
    async (messageId: string, feedback: Feedback) => {
      await updateFeedback(
        {
          url: `/messages/${messageId}/feedbacks`,
          body: { rating: feedback.rating, content: feedback.content },
        },
        appSourceType,
        appId,
      )
      toast.success(t(($) => $['api.success'], { ns: 'common' }))
    },
    [appSourceType, appId, t],
  )
  return {
    appSourceType,
    isInstalledApp,
    allowResetChat,
    appId,
    currentConversationId,
    currentConversationItem,
    removeConversationIdInfo,
    handleConversationIdInfoChange,
    appData: appInfo,
    appParams: appParams || ({} as ChatConfig),
    appMeta,
    appPinnedConversationData,
    appConversationData,
    appConversationDataLoading,
    appChatListData,
    appChatListDataLoading,
    appPrevChatList,
    pinnedConversationList,
    conversationList,
    setShowNewConversationItemInList,
    newConversationInputs,
    newConversationInputsRef,
    handleNewConversationInputsChange,
    inputsForms,
    handleNewConversation,
    handleStartChat,
    handleChangeConversation,
    handleNewConversationCompleted,
    newConversationId,
    chatShouldReloadKey,
    handleFeedback,
    currentChatInstanceRef,
    clearChatList,
    setClearChatList,
    isResponding,
    setIsResponding,
    currentConversationInputs,
    setCurrentConversationInputs,
    allInputsHidden,
    initUserVariables,
  }
}
