From f10e8b92d09ad0e422df271434d3fcccb5fe3c07 Mon Sep 17 00:00:00 2001
From: Developer <dev@bilibili-app.local>
Date: Wed, 11 Mar 2026 14:26:27 +0800
Subject: [PATCH] feat: add BigVideoCard with muted autoplay at qn=16

---
 components/BigVideoCard.tsx | 171 ++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 components/BigVideoCard.tsx

diff --git a/components/BigVideoCard.tsx b/components/BigVideoCard.tsx
new file mode 100644
index 0000000..7ecb1ab
--- /dev/null
+++ b/components/BigVideoCard.tsx
@@ -0,0 +1,171 @@
+// components/BigVideoCard.tsx
+import React, { useEffect, useRef, useState } from 'react';
+import {
+  View, Text, Image, TouchableOpacity, StyleSheet,
+  Dimensions, Animated,
+} from 'react-native';
+import Video from 'react-native-video';
+import { Ionicons } from '@expo/vector-icons';
+import { buildDashMpdUri } from '../utils/dash';
+import { getPlayUrl, getVideoDetail } from '../services/bilibili';
+import { proxyImageUrl } from '../utils/imageUrl';
+import { formatCount, formatDuration } from '../utils/format';
+import type { VideoItem } from '../services/types';
+import { useRouter } from 'expo-router';
+
+const { width: SCREEN_W } = Dimensions.get('window');
+const THUMB_H = SCREEN_W * 0.5625; // 16:9
+
+const HEADERS = {
+  Referer: 'https://www.bilibili.com',
+  'User-Agent':
+    'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+};
+
+interface Props {
+  item: VideoItem;
+  isVisible: boolean;
+  onPress: () => void;
+}
+
+export function BigVideoCard({ item, isVisible, onPress }: Props) {
+  const [videoUrl, setVideoUrl] = useState<string | undefined>();
+  const [isDash, setIsDash] = useState(false);
+  const [paused, setPaused] = useState(true);
+  const thumbOpacity = useRef(new Animated.Value(1)).current;
+
+  // Fetch play URL when visible for the first time
+  useEffect(() => {
+    if (!isVisible || videoUrl) return;
+
+    (async () => {
+      try {
+        // cid may be missing from feed items; fetch detail if needed
+        let cid = item.cid;
+        if (!cid) {
+          const detail = await getVideoDetail(item.bvid);
+          cid = detail.cid ?? detail.pages?.[0]?.cid;
+        }
+        if (!cid) return;
+
+        const playData = await getPlayUrl(item.bvid, cid, 16);
+
+        if (playData.dash) {
+          setIsDash(true);
+          try {
+            const mpdUri = await buildDashMpdUri(playData, 16);
+            setVideoUrl(mpdUri);
+          } catch {
+            setVideoUrl(playData.dash.video[0]?.baseUrl);
+          }
+        } else {
+          setVideoUrl(playData.durl?.[0]?.url);
+        }
+      } catch (e) {
+        console.warn('BigVideoCard: failed to load play URL', e);
+      }
+    })();
+  }, [isVisible]);
+
+  // Pause/resume when visibility changes
+  useEffect(() => {
+    if (!videoUrl) return;
+    setPaused(!isVisible);
+    if (!isVisible) {
+      // Restore thumbnail when leaving viewport
+      Animated.timing(thumbOpacity, { toValue: 1, duration: 150, useNativeDriver: true }).start();
+    }
+  }, [isVisible, videoUrl]);
+
+  const handleVideoReady = () => {
+    setPaused(false);
+    Animated.timing(thumbOpacity, {
+      toValue: 0,
+      duration: 300,
+      useNativeDriver: true,
+    }).start();
+  };
+
+  return (
+    <TouchableOpacity style={styles.card} onPress={onPress} activeOpacity={0.9}>
+      {/* Media area */}
+      <View style={styles.mediaContainer}>
+        {/* Thumbnail */}
+        <Animated.View style={[StyleSheet.absoluteFill, { opacity: thumbOpacity }]}>
+          <Image
+            source={{ uri: proxyImageUrl(item.pic) }}
+            style={styles.thumb}
+            resizeMode="cover"
+          />
+        </Animated.View>
+
+        {/* Duration badge on thumbnail */}
+        <View style={styles.durationBadge}>
+          <Text style={styles.durationText}>{formatDuration(item.duration)}</Text>
+        </View>
+
+        {/* Video player — only mounted when URL is available */}
+        {videoUrl && (
+          <Video
+            source={
+              isDash
+                ? { uri: videoUrl, type: 'mpd', headers: HEADERS }
+                : { uri: videoUrl, headers: HEADERS }
+            }
+            style={StyleSheet.absoluteFill}
+            resizeMode="cover"
+            muted
+            paused={paused}
+            repeat
+            controls={false}
+            onReadyForDisplay={handleVideoReady}
+          />
+        )}
+      </View>
+
+      {/* Info */}
+      <View style={styles.info}>
+        <Text style={styles.title} numberOfLines={2}>{item.title}</Text>
+        <View style={styles.meta}>
+          <Ionicons name="play" size={11} color="#999" />
+          <Text style={styles.metaText}>{formatCount(item.stat?.view ?? 0)}</Text>
+        </View>
+        <Text style={styles.owner} numberOfLines={1}>{item.owner?.name ?? ''}</Text>
+      </View>
+    </TouchableOpacity>
+  );
+}
+
+const styles = StyleSheet.create({
+  card: {
+    marginHorizontal: 4,
+    marginBottom: 6,
+    backgroundColor: '#fff',
+    borderRadius: 6,
+    overflow: 'hidden',
+  },
+  mediaContainer: {
+    width: SCREEN_W - 8,
+    height: THUMB_H,
+  },
+  thumb: {
+    width: SCREEN_W - 8,
+    height: THUMB_H,
+  },
+  durationBadge: {
+    position: 'absolute',
+    bottom: 4,
+    right: 4,
+    backgroundColor: 'rgba(0,0,0,0.6)',
+    borderRadius: 3,
+    paddingHorizontal: 4,
+    paddingVertical: 1,
+    zIndex: 2,
+  },
+  durationText: { color: '#fff', fontSize: 10 },
+  info: { padding: 8 },
+  title: { fontSize: 14, color: '#212121', lineHeight: 18, marginBottom: 4 },
+  meta: { flexDirection: 'row', alignItems: 'center', gap: 2 },
+  metaText: { fontSize: 11, color: '#999' },
+  owner: { fontSize: 11, color: '#999', marginTop: 2 },
+});