297 lines
9.9 KiB
TypeScript
297 lines
9.9 KiB
TypeScript
'use client';
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import { useEffect, useState, useCallback, useRef } from 'react';
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import Image from 'next/image';
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import { useRouter } from 'next/navigation';
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import { getTMDBImageUrl, getGenreNames, type TMDBItem } from '@/lib/tmdb.client';
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import { ChevronLeft, ChevronRight, Play } from 'lucide-react';
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interface BannerCarouselProps {
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autoPlayInterval?: number; // 自动播放间隔（毫秒）
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}
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export default function BannerCarousel({ autoPlayInterval = 5000 }: BannerCarouselProps) {
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const router = useRouter();
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const [items, setItems] = useState<TMDBItem[]>([]);
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const [currentIndex, setCurrentIndex] = useState(0);
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const [isLoading, setIsLoading] = useState(true);
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const [isPaused, setIsPaused] = useState(false);
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const [skipNextAutoPlay, setSkipNextAutoPlay] = useState(false); // 跳过下一次自动播放
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const touchStartX = useRef(0);
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const touchEndX = useRef(0);
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const isManualChange = useRef(false); // 标记是否为手动切换
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// LocalStorage 缓存配置
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const LOCALSTORAGE_KEY = 'tmdb_trending_cache';
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const LOCALSTORAGE_DURATION = 24 * 60 * 60 * 1000; // 1天
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// 跳转到播放页面
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const handlePlay = (title: string) => {
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router.push(`/play?title=${encodeURIComponent(title)}`);
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};
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// 获取热门内容
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useEffect(() => {
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const fetchTrending = async () => {
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try {
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// 先检查 localStorage 缓存
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const cached = localStorage.getItem(LOCALSTORAGE_KEY);
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if (cached) {
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try {
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const { data, timestamp } = JSON.parse(cached);
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const now = Date.now();
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// 如果缓存未过期，直接使用
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if (now - timestamp < LOCALSTORAGE_DURATION) {
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setItems(data);
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setIsLoading(false);
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return;
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}
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} catch (e) {
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// 缓存解析失败，继续请求 API
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console.error('解析缓存数据失败:', e);
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}
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}
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// 从 API 获取数据
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const response = await fetch('/api/tmdb/trending');
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const result = await response.json();
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if (result.code === 200 && result.list.length > 0) {
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setItems(result.list);
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// 保存到 localStorage
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try {
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localStorage.setItem(LOCALSTORAGE_KEY, JSON.stringify({
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data: result.list,
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timestamp: Date.now()
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}));
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} catch (e) {
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// localStorage 可能已满，忽略错误
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console.error('保存到 localStorage 失败:', e);
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}
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}
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} catch (error) {
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console.error('获取热门内容失败:', error);
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} finally {
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setIsLoading(false);
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}
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};
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fetchTrending();
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}, [LOCALSTORAGE_KEY, LOCALSTORAGE_DURATION]);
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// 自动播放
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useEffect(() => {
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if (!items.length || isPaused) return;
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const timer = setInterval(() => {
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// 如果设置了跳过标志，跳过这一次自动播放
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if (skipNextAutoPlay) {
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setSkipNextAutoPlay(false);
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return;
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}
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setCurrentIndex((prev) => (prev + 1) % items.length);
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}, autoPlayInterval);
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return () => clearInterval(timer);
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}, [items.length, isPaused, autoPlayInterval, skipNextAutoPlay]);
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const goToPrevious = useCallback(() => {
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isManualChange.current = true;
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setSkipNextAutoPlay(true);
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setCurrentIndex((prev) => (prev - 1 + items.length) % items.length);
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setTimeout(() => {
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isManualChange.current = false;
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}, 100);
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}, [items.length]);
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const goToNext = useCallback(() => {
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isManualChange.current = true;
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setSkipNextAutoPlay(true);
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setCurrentIndex((prev) => (prev + 1) % items.length);
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setTimeout(() => {
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isManualChange.current = false;
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}, 100);
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}, [items.length]);
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const goToSlide = useCallback((index: number) => {
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isManualChange.current = true;
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setSkipNextAutoPlay(true);
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setCurrentIndex(index);
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setTimeout(() => {
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isManualChange.current = false;
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}, 100);
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}, []);
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// 触摸事件处理
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const handleTouchStart = (e: React.TouchEvent) => {
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// 防止在手动切换过程中触发
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if (isManualChange.current) return;
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touchStartX.current = e.touches[0].clientX;
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touchEndX.current = 0; // 重置结束位置
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};
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const handleTouchMove = (e: React.TouchEvent) => {
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// 防止在手动切换过程中触发
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if (isManualChange.current) return;
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touchEndX.current = e.touches[0].clientX;
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};
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const handleTouchEnd = () => {
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// 防止在手动切换过程中触发
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if (isManualChange.current) return;
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if (!touchStartX.current) return;
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// 如果有滑动，则执行滑动逻辑
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if (touchEndX.current !== 0) {
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const distance = touchStartX.current - touchEndX.current;
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const minSwipeDistance = 50; // 最小滑动距离
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if (Math.abs(distance) > minSwipeDistance) {
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if (distance > 0) {
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// 向左滑动，显示下一张
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goToNext();
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} else {
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// 向右滑动，显示上一张
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goToPrevious();
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}
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}
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}
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// 重置
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touchStartX.current = 0;
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touchEndX.current = 0;
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};
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if (isLoading) {
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return (
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<div className="relative w-full h-[200px] sm:h-[300px] md:h-[400px] lg:h-[500px] bg-gradient-to-b from-gray-800 to-gray-900 overflow-hidden animate-pulse">
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<div className="absolute inset-0 flex items-center justify-center">
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<div className="w-16 h-16 border-4 border-gray-600 border-t-gray-400 rounded-full animate-spin"></div>
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</div>
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</div>
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);
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}
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if (!items.length) {
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return null;
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}
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const currentItem = items[currentIndex];
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return (
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<div
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className="relative w-full h-[200px] sm:h-[300px] md:h-[400px] lg:h-[500px] overflow-hidden group"
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onMouseEnter={() => setIsPaused(true)}
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onMouseLeave={() => setIsPaused(false)}
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onTouchStart={handleTouchStart}
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onTouchMove={handleTouchMove}
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onTouchEnd={handleTouchEnd}
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onClick={() => {
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// 移动端点击整个轮播图跳转
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if (window.innerWidth < 768) {
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handlePlay(currentItem.title);
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}
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}}
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>
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{/* 背景图片 */}
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<div className="absolute inset-0">
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{items.map((item, index) => (
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<div
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key={item.id}
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className={`absolute inset-0 transition-opacity duration-1000 ${
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index === currentIndex ? 'opacity-100' : 'opacity-0'
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}`}
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>
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<Image
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src={getTMDBImageUrl(item.backdrop_path || item.poster_path, 'original')}
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alt={item.title}
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fill
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className="object-cover"
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priority={index === 0}
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sizes="100vw"
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/>
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{/* 渐变遮罩 */}
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<div className="absolute inset-0 bg-gradient-to-r from-black/80 via-black/50 to-transparent"></div>
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<div className="absolute inset-0 bg-gradient-to-t from-black/80 via-transparent to-transparent"></div>
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</div>
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))}
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</div>
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{/* 内容信息 */}
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<div className="absolute inset-0 flex items-end p-8 md:p-12 pointer-events-none">
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<div className="max-w-2xl space-y-4">
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<h2 className="text-3xl md:text-5xl font-bold text-white drop-shadow-lg">
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{currentItem.title}
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</h2>
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<div className="flex items-center gap-2 md:gap-3 text-sm md:text-base text-white/90 flex-wrap">
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<span className="px-2 py-1 bg-yellow-500 text-black font-semibold rounded">
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{currentItem.vote_average.toFixed(1)}
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</span>
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{getGenreNames(currentItem.genre_ids, 3).map(genre => (
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<span key={genre} className="px-2 py-1 bg-white/20 backdrop-blur-sm rounded text-sm">
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{genre}
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</span>
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))}
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{currentItem.release_date && (
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<span>{currentItem.release_date}</span>
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)}
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</div>
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{/* PC端播放按钮 */}
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<button
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onClick={(e) => {
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e.stopPropagation();
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handlePlay(currentItem.title);
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}}
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className="hidden md:flex items-center gap-2 px-6 py-3 bg-gray-500/30 hover:bg-gray-500/50 backdrop-blur-sm text-white font-semibold rounded-lg transition-all pointer-events-auto"
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>
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<Play className="w-5 h-5 fill-white" />
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立即播放
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</button>
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{currentItem.overview && (
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<p className="text-sm md:text-base text-white/80 line-clamp-3 drop-shadow-md">
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{currentItem.overview}
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</p>
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)}
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</div>
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</div>
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{/* 左右切换按钮 - 只在桌面端显示 */}
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<button
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onClick={goToPrevious}
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className="hidden md:flex absolute left-4 top-1/2 -translate-y-1/2 w-12 h-12 bg-black/30 hover:bg-black/60 text-white rounded-full items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity duration-300"
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aria-label="上一张"
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>
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<ChevronLeft className="w-8 h-8" />
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</button>
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<button
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onClick={goToNext}
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className="hidden md:flex absolute right-4 top-1/2 -translate-y-1/2 w-12 h-12 bg-black/30 hover:bg-black/60 text-white rounded-full items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity duration-300"
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aria-label="下一张"
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>
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<ChevronRight className="w-8 h-8" />
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</button>
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{/* 指示器 */}
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<div className="absolute bottom-4 left-1/2 -translate-x-1/2 flex gap-2">
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{items.map((_, index) => (
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<button
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key={index}
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onClick={() => goToSlide(index)}
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className={`h-1.5 rounded-full transition-all duration-300 ${
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index === currentIndex
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? 'w-8 bg-white'
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: 'w-1.5 bg-white/50 hover:bg-white/80'
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}`}
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aria-label={`跳转到第 ${index + 1} 张`}
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/>
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))}
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</div>
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</div>
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);
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}
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