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'use client';
import { useState, useEffect, useRef } from 'react';
import { cn } from '@/lib/utils';
import { registerServiceWorker, getCacheStatus } from '@/lib/service-worker/register';
interface VideoBackgroundProps {
videos: string[];
className?: string;
overlayClassName?: string;
showIndicators?: boolean;
showCacheStatus?: boolean;
onVideoChange?: (index: number) => void;
}
/**
* VideoBackground 컴포넌트
*
* 특징:
* - 영상 프리로드로 부드러운 전환
* - 자동 재생 및 순환
* - Service Worker를 통한 영구 캐싱
* - HTTP 캐시 헤더 지원
* - 인디케이터 지원
*/
export function VideoBackground({
videos,
className,
overlayClassName,
showIndicators = true,
showCacheStatus = false,
onVideoChange,
}: VideoBackgroundProps) {
const [currentVideoIndex, setCurrentVideoIndex] = useState(0);
const [isVideoLoaded, setIsVideoLoaded] = useState(false);
const [cachedVideos, setCachedVideos] = useState(0);
const videoRef = useRef<HTMLVideoElement>(null);
const preloadedVideos = useRef<HTMLVideoElement[]>([]);
// Service Worker 등록
useEffect(() => {
const setupServiceWorker = async () => {
const registration = await registerServiceWorker();
if (registration) {
console.log('✅ Service Worker registered - Videos will be cached');
// 캐시 상태 확인
setTimeout(async () => {
const status = await getCacheStatus();
if (status) {
setCachedVideos(status.cached);
console.log(`📦 Cached videos: ${status.cached}/${status.total}`);
}
}, 2000);
}
};
setupServiceWorker();
}, []);
// 초기 랜덤 비디오 선택
useEffect(() => {
const randomIndex = Math.floor(Math.random() * videos.length);
setCurrentVideoIndex(randomIndex);
}, [videos.length]);
// 모든 비디오 프리로드
useEffect(() => {
// 이미 프리로드된 경우 스킵
if (preloadedVideos.current.length > 0) return;
const preloadVideos = async () => {
const loadedVideos: HTMLVideoElement[] = [];
for (let i = 0; i < videos.length; i++) {
const video = document.createElement('video');
video.preload = 'auto';
video.muted = true;
video.playsInline = true;
video.src = videos[i];
// 메타데이터 로드 대기
await new Promise<void>((resolve) => {
video.addEventListener('loadedmetadata', () => resolve(), { once: true });
// 타임아웃 설정 (10초)
setTimeout(() => resolve(), 10000);
});
loadedVideos.push(video);
}
preloadedVideos.current = loadedVideos;
setIsVideoLoaded(true);
};
preloadVideos();
// 컴포넌트 언마운트 시 비디오 리소스 정리
return () => {
preloadedVideos.current.forEach((video) => {
video.src = '';
video.load();
});
preloadedVideos.current = [];
};
}, [videos]);
// 비디오 변경 시 콜백 호출
useEffect(() => {
if (onVideoChange) {
onVideoChange(currentVideoIndex);
}
}, [currentVideoIndex, onVideoChange]);
// 비디오 종료 시 다음 비디오로 전환
const handleVideoEnd = () => {
setCurrentVideoIndex((prevIndex) => (prevIndex + 1) % videos.length);
};
// 인디케이터 클릭 핸들러
const handleIndicatorClick = (index: number) => {
setCurrentVideoIndex(index);
// 비디오 즉시 재생
if (videoRef.current) {
videoRef.current.currentTime = 0;
videoRef.current.play();
}
};
return (
<div className={cn('absolute inset-0 overflow-hidden', className)}>
{/* 비디오 배경 */}
<video
ref={videoRef}
key={currentVideoIndex}
autoPlay
muted
playsInline
onEnded={handleVideoEnd}
className="absolute inset-0 w-full h-full object-cover"
>
<source src={videos[currentVideoIndex]} type="video/mp4" />
</video>
{/* 오버레이 */}
<div className={cn('absolute inset-0 bg-black/40', overlayClassName)}></div>
{/* 캐시 상태 표시 (개발용) */}
{showCacheStatus && cachedVideos > 0 && (
<div className="absolute top-4 right-4 z-10 bg-black/70 text-white text-xs px-3 py-2 rounded-lg backdrop-blur-sm">
<div className="flex items-center space-x-2">
<span>
Cached: {cachedVideos}/{videos.length}
</span>
</div>
</div>
)}
{/* 비디오 인디케이터 */}
{showIndicators && isVideoLoaded && (
<div className="absolute bottom-8 left-1/2 transform -translate-x-1/2 z-10 flex justify-center space-x-2">
{videos.map((_, index) => (
<button
key={index}
onClick={() => handleIndicatorClick(index)}
className={cn(
'h-2 rounded-full transition-all duration-300 focus:outline-none focus:ring-2 focus:ring-white/50',
index === currentVideoIndex
? 'bg-white w-8'
: 'bg-white/50 hover:bg-white/75 w-2'
)}
aria-label={`비디오 ${index + 1}로 이동`}
/>
))}
</div>
)}
</div>
);
}
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