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import {type RefObject, useCallback, useEffect, useRef, useState} from 'react'
import {isSafari} from '#/lib/browser'
import {logger} from '#/logger'
import {useVideoVolumeState} from '#/components/Post/Embed/VideoEmbed/VideoVolumeContext'
export function useVideoElement(ref: RefObject<HTMLVideoElement>) {
const [playing, setPlaying] = useState(false)
const [muted, setMuted] = useState(true)
const [currentTime, setCurrentTime] = useState(0)
const [volume, setVolume] = useVideoVolumeState()
const [duration, setDuration] = useState(0)
const [buffering, setBuffering] = useState(false)
const [error, setError] = useState(false)
const [canPlay, setCanPlay] = useState(false)
const playWhenReadyRef = useRef(false)
useEffect(() => {
if (!ref.current) return
ref.current.volume = volume
}, [ref, volume])
useEffect(() => {
if (!ref.current) return
let bufferingTimeout: ReturnType<typeof setTimeout> | undefined
function round(num: number) {
return Math.round(num * 100) / 100
}
// Initial values
setCurrentTime(round(ref.current.currentTime) || 0)
setDuration(round(ref.current.duration) || 0)
setMuted(ref.current.muted)
setPlaying(!ref.current.paused)
setVolume(ref.current.volume)
const handleTimeUpdate = () => {
if (!ref.current) return
setCurrentTime(round(ref.current.currentTime) || 0)
// HACK: Safari randomly fires `stalled` events when changing between segments
// let's just clear the buffering state if the video is still progressing -sfn
if (isSafari) {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
setBuffering(false)
}
}
const handleDurationChange = () => {
if (!ref.current) return
setDuration(round(ref.current.duration) || 0)
}
const handlePlay = () => {
setPlaying(true)
}
const handlePause = () => {
setPlaying(false)
}
const handleVolumeChange = () => {
if (!ref.current) return
setMuted(ref.current.muted)
}
const handleError = () => {
setError(true)
}
const handleCanPlay = async () => {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
setBuffering(false)
setCanPlay(true)
if (!ref.current) return
if (playWhenReadyRef.current) {
try {
await ref.current.play()
} catch (e: any) {
if (
!e.message?.includes(
`The request is not allowed by the user agent`,
) &&
!e.message?.includes(
`The play() request was interrupted by a call to pause()`,
)
) {
throw e
}
}
playWhenReadyRef.current = false
}
}
const handleCanPlayThrough = () => {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
setBuffering(false)
}
const handleWaiting = () => {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
bufferingTimeout = setTimeout(() => {
setBuffering(true)
}, 500) // Delay to avoid frequent buffering state changes
}
const handlePlaying = () => {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
setBuffering(false)
setError(false)
}
const handleStalled = () => {
if (bufferingTimeout) clearTimeout(bufferingTimeout)
bufferingTimeout = setTimeout(() => {
setBuffering(true)
}, 500) // Delay to avoid frequent buffering state changes
}
const handleEnded = () => {
setPlaying(false)
setBuffering(false)
setError(false)
}
const abortController = new AbortController()
ref.current.addEventListener('timeupdate', handleTimeUpdate, {
signal: abortController.signal,
})
ref.current.addEventListener('durationchange', handleDurationChange, {
signal: abortController.signal,
})
ref.current.addEventListener('play', handlePlay, {
signal: abortController.signal,
})
ref.current.addEventListener('pause', handlePause, {
signal: abortController.signal,
})
ref.current.addEventListener('volumechange', handleVolumeChange, {
signal: abortController.signal,
})
ref.current.addEventListener('error', handleError, {
signal: abortController.signal,
})
ref.current.addEventListener('canplay', handleCanPlay, {
signal: abortController.signal,
})
ref.current.addEventListener('canplaythrough', handleCanPlayThrough, {
signal: abortController.signal,
})
ref.current.addEventListener('waiting', handleWaiting, {
signal: abortController.signal,
})
ref.current.addEventListener('playing', handlePlaying, {
signal: abortController.signal,
})
ref.current.addEventListener('stalled', handleStalled, {
signal: abortController.signal,
})
ref.current.addEventListener('ended', handleEnded, {
signal: abortController.signal,
})
return () => {
abortController.abort()
clearTimeout(bufferingTimeout)
}
}, [ref, setVolume])
const play = useCallback(() => {
if (!ref.current) return
if (ref.current.ended) {
ref.current.currentTime = 0
}
if (ref.current.readyState < HTMLMediaElement.HAVE_FUTURE_DATA) {
playWhenReadyRef.current = true
} else {
const promise = ref.current.play()
if (promise !== undefined) {
promise.catch((err: any) => {
if (
// ignore this common error. it's fine
!err.message?.includes(
`The play() request was interrupted by a call to pause()`,
)
) {
logger.error('Error playing video:', {message: err})
}
})
}
}
}, [ref])
const pause = useCallback(() => {
if (!ref.current) return
ref.current.pause()
playWhenReadyRef.current = false
}, [ref])
const togglePlayPause = useCallback(() => {
if (!ref.current) return
if (ref.current.paused) {
play()
} else {
pause()
}
}, [ref, play, pause])
const changeMuted = useCallback(
(newMuted: boolean | ((prev: boolean) => boolean)) => {
if (!ref.current) return
const value =
typeof newMuted === 'function' ? newMuted(ref.current.muted) : newMuted
ref.current.muted = value
},
[ref],
)
return {
play,
pause,
togglePlayPause,
duration,
currentTime,
playing,
muted,
changeMuted,
buffering,
error,
canPlay,
}
}
export function formatTime(time: number) {
if (isNaN(time)) {
return '--'
}
time = Math.round(time)
const minutes = Math.floor(time / 60)
const seconds = String(time % 60).padStart(2, '0')
return `${minutes}:${seconds}`
}
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