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'use client'
import { useState, useCallback, useEffect, useMemo } from 'react'
import { useAtom, useAtomValue } from 'jotai'
import { chatFamily, bingConversationStyleAtom, GreetMessages, hashAtom, voiceAtom } from '@/state'
import { setConversationMessages } from './chat-history'
import { ChatMessageModel, BotId, FileItem } from '@/lib/bots/bing/types'
import { nanoid } from '../utils'
import { TTS } from '../bots/bing/tts'
export function useBing(botId: BotId = 'bing') {
const chatAtom = useMemo(() => chatFamily({ botId, page: 'singleton' }), [botId])
const [enableTTS] = useAtom(voiceAtom)
const speaker = useMemo(() => new TTS(), [])
const [hash, setHash] = useAtom(hashAtom)
const bingConversationStyle = useAtomValue(bingConversationStyleAtom)
const [chatState, setChatState] = useAtom(chatAtom)
const [input, setInput] = useState('')
const [attachmentList, setAttachmentList] = useState<FileItem[]>([])
const updateMessage = useCallback(
(messageId: string, updater: (message: ChatMessageModel) => void) => {
setChatState((draft) => {
const message = draft.messages.find((m) => m.id === messageId)
if (message) {
updater(message)
}
})
},
[setChatState],
)
const sendMessage = useCallback(
async (input: string, options = {}) => {
const botMessageId = nanoid()
const imageUrl = attachmentList?.[0]?.status === 'loaded' ? attachmentList[0].url : undefined
setChatState((draft) => {
const text = imageUrl ? `${input}\n\n` : input
draft.messages.push({ id: nanoid(), text, author: 'user' }, { id: botMessageId, text: '', author: 'bot' })
setAttachmentList([])
})
const abortController = new AbortController()
setChatState((draft) => {
draft.generatingMessageId = botMessageId
draft.abortController = abortController
})
speaker.reset()
await chatState.bot.sendMessage({
prompt: input,
imageUrl: /\?bcid=([^&]+)/.test(imageUrl ?? '') ? `https://www.bing.com/images/blob?bcid=${RegExp.$1}` : imageUrl,
options: {
...options,
bingConversationStyle,
},
signal: abortController.signal,
onEvent(event) {
if (event.type === 'UPDATE_ANSWER') {
updateMessage(botMessageId, (message) => {
if (event.data.text.length > message.text.length) {
message.text = event.data.text
}
if (event.data.spokenText && enableTTS) {
speaker.speak(event.data.spokenText)
}
message.throttling = event.data.throttling || message.throttling
message.sourceAttributions = event.data.sourceAttributions || message.sourceAttributions
message.suggestedResponses = event.data.suggestedResponses || message.suggestedResponses
})
} else if (event.type === 'ERROR') {
updateMessage(botMessageId, (message) => {
message.error = event.error
})
setChatState((draft) => {
draft.abortController = undefined
draft.generatingMessageId = ''
})
} else if (event.type === 'DONE') {
setChatState((draft) => {
draft.abortController = undefined
draft.generatingMessageId = ''
})
}
},
})
},
[botId, attachmentList, chatState.bot, setChatState, updateMessage],
)
const uploadImage = useCallback(async (imgUrl: string) => {
setAttachmentList([{ url: imgUrl, status: 'loading' }])
const response = await chatState.bot.uploadImage(imgUrl, bingConversationStyle)
if (response?.blobId) {
setAttachmentList([{ url: `/api/blob?bcid=${response.blobId}`, status: 'loaded' }])
} else {
setAttachmentList([{ url: imgUrl, status: 'error' }])
}
}, [chatState.bot])
const resetConversation = useCallback(() => {
chatState.bot.resetConversation()
speaker.abort()
setChatState((draft) => {
draft.abortController = undefined
draft.generatingMessageId = ''
draft.messages = [{ author: 'bot', text: GreetMessages[Math.floor(GreetMessages.length * Math.random())], id: nanoid() }]
draft.conversationId = nanoid()
})
}, [chatState.bot, setChatState])
const stopGenerating = useCallback(() => {
chatState.abortController?.abort()
if (chatState.generatingMessageId) {
updateMessage(chatState.generatingMessageId, (message) => {
if (!message.text && !message.error) {
message.text = 'Cancelled'
}
})
}
setChatState((draft) => {
draft.generatingMessageId = ''
})
}, [chatState.abortController, chatState.generatingMessageId, setChatState, updateMessage])
useEffect(() => {
if (chatState.messages.length) {
setConversationMessages(botId, chatState.conversationId, chatState.messages)
}
}, [botId, chatState.conversationId, chatState.messages])
useEffect(() => {
if (hash === 'reset') {
resetConversation()
setHash('')
}
}, [hash, setHash])
const chat = useMemo(
() => ({
botId,
bot: chatState.bot,
isSpeaking: speaker.isSpeaking,
messages: chatState.messages,
sendMessage,
setInput,
input,
resetConversation,
generating: !!chatState.generatingMessageId,
stopGenerating,
uploadImage,
setAttachmentList,
attachmentList,
}),
[
botId,
bingConversationStyle,
chatState.bot,
chatState.generatingMessageId,
chatState.messages,
speaker.isSpeaking,
setInput,
input,
setAttachmentList,
attachmentList,
resetConversation,
sendMessage,
stopGenerating,
],
)
return chat
}
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