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import React, {useContext, useState, useSyncExternalStore} from 'react'
import {AppState} from 'react-native'
import {BskyAgent} from '@atproto-labs/api'
import {useFocusEffect, useIsFocused} from '@react-navigation/native'
import {Convo} from '#/state/messages/convo/agent'
import {ConvoParams, ConvoState} from '#/state/messages/convo/types'
import {useMarkAsReadMutation} from '#/state/queries/messages/conversation'
import {useAgent} from '#/state/session'
import {useDmServiceUrlStorage} from '#/screens/Messages/Temp/useDmServiceUrlStorage'
const ChatContext = React.createContext<ConvoState | null>(null)
export function useConvo() {
const ctx = useContext(ChatContext)
if (!ctx) {
throw new Error('useConvo must be used within a ConvoProvider')
}
return ctx
}
export function ConvoProvider({
children,
convoId,
}: Pick<ConvoParams, 'convoId'> & {children: React.ReactNode}) {
const isScreenFocused = useIsFocused()
const {serviceUrl} = useDmServiceUrlStorage()
const {getAgent} = useAgent()
const [convo] = useState(
() =>
new Convo({
convoId,
agent: new BskyAgent({
service: serviceUrl,
}),
__tempFromUserDid: getAgent().session?.did!,
}),
)
const service = useSyncExternalStore(convo.subscribe, convo.getSnapshot)
const {mutate: markAsRead} = useMarkAsReadMutation()
useFocusEffect(
React.useCallback(() => {
convo.resume()
markAsRead({convoId})
return () => {
convo.background()
markAsRead({convoId})
}
}, [convo, convoId, markAsRead]),
)
React.useEffect(() => {
const handleAppStateChange = (nextAppState: string) => {
if (isScreenFocused) {
if (nextAppState === 'active') {
convo.resume()
} else {
convo.background()
}
markAsRead({convoId})
}
}
const sub = AppState.addEventListener('change', handleAppStateChange)
return () => {
sub.remove()
}
}, [convoId, convo, isScreenFocused, markAsRead])
return <ChatContext.Provider value={service}>{children}</ChatContext.Provider>
}
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