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import {useCallback, useEffect, useImperativeHandle, useState} from 'react'
import {findNodeHandle, View} from 'react-native'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useQueryClient} from '@tanstack/react-query'
import {useInitialNumToRender} from '#/lib/hooks/useInitialNumToRender'
import {isIOS, isNative} from '#/platform/detection'
import {type FeedDescriptor} from '#/state/queries/post-feed'
import {RQKEY as FEED_RQKEY} from '#/state/queries/post-feed'
import {truncateAndInvalidate} from '#/state/queries/util'
import {PostFeed} from '#/view/com/posts/PostFeed'
import {EmptyState} from '#/view/com/util/EmptyState'
import {type ListRef} from '#/view/com/util/List'
import {LoadLatestBtn} from '#/view/com/util/load-latest/LoadLatestBtn'
import {atoms as a, ios, useTheme} from '#/alf'
import {Text} from '#/components/Typography'
import {type SectionRef} from './types'
interface FeedSectionProps {
ref?: React.Ref<SectionRef>
feed: FeedDescriptor
headerHeight: number
isFocused: boolean
scrollElRef: ListRef
ignoreFilterFor?: string
setScrollViewTag: (tag: number | null) => void
}
export function ProfileFeedSection({
ref,
feed,
headerHeight,
isFocused,
scrollElRef,
ignoreFilterFor,
setScrollViewTag,
}: FeedSectionProps) {
const {_} = useLingui()
const queryClient = useQueryClient()
const [hasNew, setHasNew] = useState(false)
const [isScrolledDown, setIsScrolledDown] = useState(false)
const shouldUseAdjustedNumToRender = feed.endsWith('posts_and_author_threads')
const isVideoFeed = isNative && feed.endsWith('posts_with_video')
const adjustedInitialNumToRender = useInitialNumToRender({
screenHeightOffset: headerHeight,
})
const onScrollToTop = useCallback(() => {
scrollElRef.current?.scrollToOffset({
animated: isNative,
offset: -headerHeight,
})
truncateAndInvalidate(queryClient, FEED_RQKEY(feed))
setHasNew(false)
}, [scrollElRef, headerHeight, queryClient, feed, setHasNew])
useImperativeHandle(ref, () => ({
scrollToTop: onScrollToTop,
}))
const renderPostsEmpty = useCallback(() => {
return <EmptyState icon="growth" message={_(msg`No posts yet.`)} />
}, [_])
useEffect(() => {
if (isIOS && isFocused && scrollElRef.current) {
const nativeTag = findNodeHandle(scrollElRef.current)
setScrollViewTag(nativeTag)
}
}, [isFocused, scrollElRef, setScrollViewTag])
return (
<View>
<PostFeed
testID="postsFeed"
enabled={isFocused}
feed={feed}
scrollElRef={scrollElRef}
onHasNew={setHasNew}
onScrolledDownChange={setIsScrolledDown}
renderEmptyState={renderPostsEmpty}
headerOffset={headerHeight}
progressViewOffset={ios(0)}
renderEndOfFeed={isVideoFeed ? undefined : ProfileEndOfFeed}
ignoreFilterFor={ignoreFilterFor}
initialNumToRender={
shouldUseAdjustedNumToRender ? adjustedInitialNumToRender : undefined
}
isVideoFeed={isVideoFeed}
/>
{(isScrolledDown || hasNew) && (
<LoadLatestBtn
onPress={onScrollToTop}
label={_(msg`Load new posts`)}
showIndicator={hasNew}
/>
)}
</View>
)
}
function ProfileEndOfFeed() {
const t = useTheme()
return (
<View
style={[a.w_full, a.py_5xl, a.border_t, t.atoms.border_contrast_medium]}>
<Text style={[t.atoms.text_contrast_medium, a.text_center]}>
<Trans>End of feed</Trans>
</Text>
</View>
)
}
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