'use client'
import type { FC } from 'react'
import React, { useEffect, useRef } from 'react'
import cn from 'classnames'
import { HandThumbDownIcon, HandThumbUpIcon } from '@heroicons/react/24/outline'
import { useTranslation } from 'react-i18next'
import Textarea from 'rc-textarea'
import s from './style.module.css'
import LoadingAnim from './loading-anim'
import { randomString } from '@/utils/string'
import type { Feedbacktype, MessageRating, VisionFile, VisionSettings } from '@/types/app'
import { TransferMethod } from '@/types/app'
import Tooltip from '@/app/components/base/tooltip'
import Toast from '@/app/components/base/toast'
import { Markdown } from '@/app/components/base/markdown'
import ChatImageUploader from '@/app/components/base/image-uploader/chat-image-uploader'
import ImageList from '@/app/components/base/image-uploader/image-list'
import { useImageFiles } from '@/app/components/base/image-uploader/hooks'
import ImageGallery from '@/app/components/base/image-gallery'

export type FeedbackFunc = (messageId: string, feedback: Feedbacktype) => Promise<any>

export type IChatProps = {
  chatList: IChatItem[]
  /**
   * Whether to display the editing area and rating status
   */
  feedbackDisabled?: boolean
  /**
   * Whether to display the input area
   */
  isHideSendInput?: boolean
  onFeedback?: FeedbackFunc
  checkCanSend?: () => boolean
  onSend?: (message: string, files: VisionFile[]) => void
  useCurrentUserAvatar?: boolean
  isResponsing?: boolean
  controlClearQuery?: number
  visionConfig?: VisionSettings
}

export type IChatItem = {
  id: string
  content: string
  /**
   * Specific message type
   */
  isAnswer: boolean
  /**
   * The user feedback result of this message
   */
  feedback?: Feedbacktype
  /**
   * Whether to hide the feedback area
   */
  feedbackDisabled?: boolean
  isIntroduction?: boolean
  useCurrentUserAvatar?: boolean
  isOpeningStatement?: boolean
  message_files?: VisionFile[]
}

const OperationBtn = ({ innerContent, onClick, className }: { innerContent: React.ReactNode; onClick?: () => void; className?: string }) => (
  <div
    className={`relative box-border flex items-center justify-center h-7 w-7 p-0.5 rounded-lg bg-white cursor-pointer text-gray-500 hover:text-gray-800 ${className ?? ''}`}
    style={{ boxShadow: '0px 4px 6px -1px rgba(0, 0, 0, 0.1), 0px 2px 4px -2px rgba(0, 0, 0, 0.05)' }}
    onClick={onClick && onClick}
  >
    {innerContent}
  </div>
)

const OpeningStatementIcon: FC<{ className?: string }> = ({ className }) => (
  <svg width="12" height="12" viewBox="0 0 12 12" fill="none" xmlns="http://www.w3.org/2000/svg">
    <path fillRule="evenodd" clipRule="evenodd" d="M6.25002 1C3.62667 1 1.50002 3.12665 1.50002 5.75C1.50002 6.28 1.58702 6.79071 1.7479 7.26801C1.7762 7.35196 1.79285 7.40164 1.80368 7.43828L1.80722 7.45061L1.80535 7.45452C1.79249 7.48102 1.77339 7.51661 1.73766 7.58274L0.911727 9.11152C0.860537 9.20622 0.807123 9.30503 0.770392 9.39095C0.733879 9.47635 0.674738 9.63304 0.703838 9.81878C0.737949 10.0365 0.866092 10.2282 1.05423 10.343C1.21474 10.4409 1.38213 10.4461 1.475 10.4451C1.56844 10.444 1.68015 10.4324 1.78723 10.4213L4.36472 10.1549C4.406 10.1506 4.42758 10.1484 4.44339 10.1472L4.44542 10.147L4.45161 10.1492C4.47103 10.1562 4.49738 10.1663 4.54285 10.1838C5.07332 10.3882 5.64921 10.5 6.25002 10.5C8.87338 10.5 11 8.37335 11 5.75C11 3.12665 8.87338 1 6.25002 1ZM4.48481 4.29111C5.04844 3.81548 5.7986 3.9552 6.24846 4.47463C6.69831 3.9552 7.43879 3.82048 8.01211 4.29111C8.58544 4.76175 8.6551 5.562 8.21247 6.12453C7.93825 6.47305 7.24997 7.10957 6.76594 7.54348C6.58814 7.70286 6.49924 7.78255 6.39255 7.81466C6.30103 7.84221 6.19589 7.84221 6.10436 7.81466C5.99767 7.78255 5.90878 7.70286 5.73098 7.54348C5.24694 7.10957 4.55867 6.47305 4.28444 6.12453C3.84182 5.562 3.92117 4.76675 4.48481 4.29111Z" fill="#667085" />
  </svg>
)

const RatingIcon: FC<{ isLike: boolean }> = ({ isLike }) => {
  return isLike ? <HandThumbUpIcon className='w-4 h-4' /> : <HandThumbDownIcon className='w-4 h-4' />
}

const EditIcon: FC<{ className?: string }> = ({ className }) => {
  return <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" className={className}>
    <path d="M14 11.9998L13.3332 12.7292C12.9796 13.1159 12.5001 13.3332 12.0001 13.3332C11.5001 13.3332 11.0205 13.1159 10.6669 12.7292C10.3128 12.3432 9.83332 12.1265 9.33345 12.1265C8.83359 12.1265 8.35409 12.3432 7.99998 12.7292M2 13.3332H3.11636C3.44248 13.3332 3.60554 13.3332 3.75899 13.2963C3.89504 13.2637 4.0251 13.2098 4.1444 13.1367C4.27895 13.0542 4.39425 12.9389 4.62486 12.7083L13 4.33316C13.5523 3.78087 13.5523 2.88544 13 2.33316C12.4477 1.78087 11.5523 1.78087 11 2.33316L2.62484 10.7083C2.39424 10.9389 2.27894 11.0542 2.19648 11.1888C2.12338 11.3081 2.0695 11.4381 2.03684 11.5742C2 11.7276 2 11.8907 2 12.2168V13.3332Z" stroke="#6B7280" strokeLinecap="round" strokeLinejoin="round" />
  </svg>
}

export const EditIconSolid: FC<{ className?: string }> = ({ className }) => {
  return <svg width="12" height="12" viewBox="0 0 12 12" fill="none" xmlns="http://www.w3.org/2000/svg" className={className}>
    <path fillRule="evenodd" clip-rule="evenodd" d="M10.8374 8.63108C11.0412 8.81739 11.0554 9.13366 10.8691 9.33747L10.369 9.88449C10.0142 10.2725 9.52293 10.5001 9.00011 10.5001C8.47746 10.5001 7.98634 10.2727 7.63157 9.8849C7.45561 9.69325 7.22747 9.59515 7.00014 9.59515C6.77271 9.59515 6.54446 9.69335 6.36846 9.88517C6.18177 10.0886 5.86548 10.1023 5.66201 9.91556C5.45853 9.72888 5.44493 9.41259 5.63161 9.20911C5.98678 8.82201 6.47777 8.59515 7.00014 8.59515C7.52251 8.59515 8.0135 8.82201 8.36867 9.20911L8.36924 9.20974C8.54486 9.4018 8.77291 9.50012 9.00011 9.50012C9.2273 9.50012 9.45533 9.40182 9.63095 9.20979L10.131 8.66276C10.3173 8.45895 10.6336 8.44476 10.8374 8.63108Z" fill="#6B7280" />
    <path fillRule="evenodd" clip-rule="evenodd" d="M7.89651 1.39656C8.50599 0.787085 9.49414 0.787084 10.1036 1.39656C10.7131 2.00604 10.7131 2.99419 10.1036 3.60367L3.82225 9.88504C3.81235 9.89494 3.80254 9.90476 3.79281 9.91451C3.64909 10.0585 3.52237 10.1855 3.3696 10.2791C3.23539 10.3613 3.08907 10.4219 2.93602 10.4587C2.7618 10.5005 2.58242 10.5003 2.37897 10.5001C2.3652 10.5001 2.35132 10.5001 2.33732 10.5001H1.50005C1.22391 10.5001 1.00005 10.2763 1.00005 10.0001V9.16286C1.00005 9.14886 1.00004 9.13497 1.00003 9.1212C0.999836 8.91776 0.999669 8.73838 1.0415 8.56416C1.07824 8.4111 1.13885 8.26479 1.22109 8.13058C1.31471 7.97781 1.44166 7.85109 1.58566 7.70736C1.5954 7.69764 1.60523 7.68783 1.61513 7.67793L7.89651 1.39656Z" fill="#6B7280" />
  </svg>
}

const IconWrapper: FC<{ children: React.ReactNode | string }> = ({ children }) => {
  return <div className={'rounded-lg h-6 w-6 flex items-center justify-center hover:bg-gray-100'}>
    {children}
  </div>
}

type IAnswerProps = {
  item: IChatItem
  feedbackDisabled: boolean
  onFeedback?: FeedbackFunc
  isResponsing?: boolean
}

// The component needs to maintain its own state to control whether to display input component
const Answer: FC<IAnswerProps> = ({ item, feedbackDisabled = false, onFeedback, isResponsing }) => {
  const { id, content, feedback } = item
  const { t } = useTranslation()

  /**
 * Render feedback results (distinguish between users and administrators)
 * User reviews cannot be cancelled in Console
 * @param rating feedback result
 * @param isUserFeedback Whether it is user's feedback
 * @returns comp
 */
  const renderFeedbackRating = (rating: MessageRating | undefined) => {
    if (!rating)
      return null

    const isLike = rating === 'like'
    const ratingIconClassname = isLike ? 'text-primary-600 bg-primary-100 hover:bg-primary-200' : 'text-red-600 bg-red-100 hover:bg-red-200'
    // The tooltip is always displayed, but the content is different for different scenarios.
    return (
      <Tooltip
        selector={`user-feedback-${randomString(16)}`}
        content={isLike ? '取消赞同' : '取消反对'}
      >
        <div
          className={'relative box-border flex items-center justify-center h-7 w-7 p-0.5 rounded-lg bg-white cursor-pointer text-gray-500 hover:text-gray-800'}
          style={{ boxShadow: '0px 4px 6px -1px rgba(0, 0, 0, 0.1), 0px 2px 4px -2px rgba(0, 0, 0, 0.05)' }}
          onClick={async () => {
            await onFeedback?.(id, { rating: null })
          }}
        >
          <div className={`${ratingIconClassname} rounded-lg h-6 w-6 flex items-center justify-center`}>
            <RatingIcon isLike={isLike} />
          </div>
        </div>
      </Tooltip>
    )
  }

  /**
   * Different scenarios have different operation items.
   * @returns comp
   */
  const renderItemOperation = () => {
    const userOperation = () => {
      return feedback?.rating
        ? null
        : <div className='flex gap-1'>
          <Tooltip selector={`user-feedback-${randomString(16)}`} content={t('common.operation.like') as string}>
            {OperationBtn({ innerContent: <IconWrapper><RatingIcon isLike={true} /></IconWrapper>, onClick: () => onFeedback?.(id, { rating: 'like' }) })}
          </Tooltip>
          <Tooltip selector={`user-feedback-${randomString(16)}`} content={t('common.operation.dislike') as string}>
            {OperationBtn({ innerContent: <IconWrapper><RatingIcon isLike={false} /></IconWrapper>, onClick: () => onFeedback?.(id, { rating: 'dislike' }) })}
          </Tooltip>
        </div>
    }

    return (
      <div className={`${s.itemOperation} flex gap-2`}>
        {userOperation()}
      </div>
    )
  }

  return (
    <div key={id}>
      <div className='flex items-start'>
        <div className={`${s.answerIcon} w-10 h-10 shrink-0`}>
          {isResponsing
            && <div className={s.typeingIcon}>
              <LoadingAnim type='avatar' />
            </div>
          }
        </div>
        <div className={`${s.answerWrap}`}>
          <div className={`${s.answer} relative text-sm text-gray-900`}>
            <div className={'ml-2 py-3 px-4 bg-gray-100 rounded-tr-2xl rounded-b-2xl'}>
              {item.isOpeningStatement && (
                <div className='flex items-center mb-1 gap-1'>
                  <OpeningStatementIcon />
                  <div className='text-xs text-gray-500'>{t('app.chat.openingStatementTitle')}</div>
                </div>
              )}
              {(isResponsing && !content)
                ? (
                  <div className='flex items-center justify-center w-6 h-5'>
                    <LoadingAnim type='text' />
                  </div>
                )
                : (
                  <Markdown content={content} />
                )}
            </div>
            <div className='absolute top-[-14px] right-[-14px] flex flex-row justify-end gap-1'>
              {!feedbackDisabled && !item.feedbackDisabled && renderItemOperation()}
              {/* User feedback must be displayed */}
              {!feedbackDisabled && renderFeedbackRating(feedback?.rating)}
            </div>
          </div>
        </div>
      </div>
    </div>
  )
}

type IQuestionProps = Pick<IChatItem, 'id' | 'content' | 'useCurrentUserAvatar'> & {
  imgSrcs?: string[]
}

const Question: FC<IQuestionProps> = ({ id, content, useCurrentUserAvatar, imgSrcs }) => {
  const userName = ''
  return (
    <div className='flex items-start justify-end' key={id}>
      <div>
        <div className={`${s.question} relative text-sm text-gray-900`}>
          <div
            className={'mr-2 py-3 px-4 bg-blue-500 rounded-tl-2xl rounded-b-2xl'}
          >
            {imgSrcs && imgSrcs.length > 0 && (
              <ImageGallery srcs={imgSrcs} />
            )}
            <Markdown content={content} />
          </div>
        </div>
      </div>
      {useCurrentUserAvatar
        ? (
          <div className='w-10 h-10 shrink-0 leading-10 text-center mr-2 rounded-full bg-primary-600 text-white'>
            {userName?.[0].toLocaleUpperCase()}
          </div>
        )
        : (
          <div className={`${s.questionIcon} w-10 h-10 shrink-0 `}></div>
        )}
    </div>
  )
}

const Chat: FC<IChatProps> = ({
  chatList,
  feedbackDisabled = false,
  isHideSendInput = false,
  onFeedback,
  checkCanSend,
  onSend = () => { },
  useCurrentUserAvatar,
  isResponsing,
  controlClearQuery,
  visionConfig,
}) => {
  const { t } = useTranslation()
  const { notify } = Toast
  const isUseInputMethod = useRef(false)

  const [query, setQuery] = React.useState('')
  const handleContentChange = (e: any) => {
    const value = e.target.value
    setQuery(value)
  }

  const logError = (message: string) => {
    notify({ type: 'error', message, duration: 3000 })
  }

  const valid = () => {
    if (!query || query.trim() === '') {
      logError('Message cannot be empty')
      return false
    }
    return true
  }

  useEffect(() => {
    if (controlClearQuery)
      setQuery('')
  }, [controlClearQuery])
  const {
    files,
    onUpload,
    onRemove,
    onReUpload,
    onImageLinkLoadError,
    onImageLinkLoadSuccess,
    onClear,
  } = useImageFiles()

  const handleSend = () => {
    if (!valid() || (checkCanSend && !checkCanSend()))
      return
    onSend(query, files.filter(file => file.progress !== -1).map(fileItem => ({
      type: 'image',
      transfer_method: fileItem.type,
      url: fileItem.url,
      upload_file_id: fileItem.fileId,
    })))
    if (!files.find(item => item.type === TransferMethod.local_file && !item.fileId)) {
      if (files.length)
        onClear()
      if (!isResponsing)
        setQuery('')
    }
  }

  const handleKeyUp = (e: any) => {
    if (e.code === 'Enter') {
      e.preventDefault()
      // prevent send message when using input method enter
      if (!e.shiftKey && !isUseInputMethod.current)
        handleSend()
    }
  }

  const handleKeyDown = (e: any) => {
    isUseInputMethod.current = e.nativeEvent.isComposing
    if (e.code === 'Enter' && !e.shiftKey) {
      setQuery(query.replace(/\n$/, ''))
      e.preventDefault()
    }
  }

  return (
    <div className={cn(!feedbackDisabled && 'px-3.5', 'h-full')}>
      {/* Chat List */}
      <div className="h-full space-y-[30px]">
        {chatList.map((item) => {
          if (item.isAnswer) {
            const isLast = item.id === chatList[chatList.length - 1].id
            return <Answer
              key={item.id}
              item={item}
              feedbackDisabled={feedbackDisabled}
              onFeedback={onFeedback}
              isResponsing={isResponsing && isLast}
            />
          }
          return (
            <Question
              key={item.id}
              id={item.id}
              content={item.content}
              useCurrentUserAvatar={useCurrentUserAvatar}
              imgSrcs={(item.message_files && item.message_files?.length > 0) ? item.message_files.map(item => item.url) : []}
            />
          )
        })}
      </div>
      {
        !isHideSendInput && (
          <div className={cn(!feedbackDisabled && '!left-3.5 !right-3.5', 'absolute z-10 bottom-0 left-0 right-0')}>
            <div className='p-[5.5px] max-h-[150px] bg-white border-[1.5px] border-gray-200 rounded-xl overflow-y-auto'>
              {
                visionConfig?.enabled && (
                  <>
                    <div className='absolute bottom-2 left-2 flex items-center'>
                      <ChatImageUploader
                        settings={visionConfig}
                        onUpload={onUpload}
                        disabled={files.length >= visionConfig.number_limits}
                      />
                      <div className='mx-1 w-[1px] h-4 bg-black/5' />
                    </div>
                    <div className='pl-[52px]'>
                      <ImageList
                        list={files}
                        onRemove={onRemove}
                        onReUpload={onReUpload}
                        onImageLinkLoadSuccess={onImageLinkLoadSuccess}
                        onImageLinkLoadError={onImageLinkLoadError}
                      />
                    </div>
                  </>
                )
              }
              <Textarea
                className={`
                  block w-full px-2 pr-[118px] py-[7px] leading-5 max-h-none text-sm text-gray-700 outline-none appearance-none resize-none
                  ${visionConfig?.enabled && 'pl-12'}
                `}
                value={query}
                onChange={handleContentChange}
                onKeyUp={handleKeyUp}
                onKeyDown={handleKeyDown}
                autoSize
              />
              <div className="absolute bottom-2 right-2 flex items-center h-8">
                <div className={`${s.count} mr-4 h-5 leading-5 text-sm bg-gray-50 text-gray-500`}>{query.trim().length}</div>
                <Tooltip
                  selector='send-tip'
                  htmlContent={
                    <div>
                      <div>{t('common.operation.send')} Enter</div>
                      <div>{t('common.operation.lineBreak')} Shift Enter</div>
                    </div>
                  }
                >
                  <div className={`${s.sendBtn} w-8 h-8 cursor-pointer rounded-md`} onClick={handleSend}></div>
                </Tooltip>
              </div>
            </div>
          </div>
        )
      }
    </div>
  )
}

export default React.memo(Chat)