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* PostDetailScreen - 帖子详情页
*
* Premium Design with:
* - 全宽无边框媒体展示
* - 悬浮底部操作栏
* - 固定底部评论输入框
* - 流畅的过渡动画
*/
import React, { memo, useCallback, useEffect, useState, useRef } from 'react';
import { BackHandler, KeyboardAvoidingView, Platform, Dimensions } from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import { styled, YStack, ScrollView } from 'tamagui';
import Animated, {
useAnimatedStyle,
useSharedValue,
withSpring,
withTiming,
Easing,
runOnJS,
} from 'react-native-reanimated';
import { Gesture, GestureDetector } from 'react-native-gesture-handler';
import { supabaseForumService, type Post, type PostMedia } from '@/src/lib/supabase';
import { UserProfileModal } from '@/src/components/UserProfileModal';
import { VideoPlayer } from '@/src/components/VideoPlayer';
import { CommentSection } from './CommentSection';
import { CommentInput } from './CommentInput';
import { PostActions } from './PostActions';
import { PostContent } from './PostContent';
import { PostDetailHeader } from './PostDetailHeader';
import { PostMediaGallery } from './PostMediaGallery';
import { usePostDetail } from './usePostDetail';
const { height: SCREEN_HEIGHT } = Dimensions.get('window');
export interface PostDetailScreenProps {
/** 是否显示 */
visible: boolean;
/** 帖子数据 */
post: Post | null;
/** 关闭详情页 */
onClose: () => void;
/** 顶部偏移（适配 header） */
headerOffset?: number;
/** 编辑帖子 */
onEditPost?: (post: Post) => void;
/** 帖子删除后回调 */
onPostDeleted?: () => void;
}
// 样式组件
const Container = styled(YStack, {
name: 'PostDetailScreen',
position: 'absolute',
left: 0,
right: 0,
bottom: 0,
backgroundColor: '#fff',
zIndex: 300,
});
const ContentScrollView = styled(ScrollView, {
name: 'PostContentScroll',
flex: 1,
backgroundColor: '#fff',
});
const Divider = styled(YStack, {
name: 'Divider',
height: 8,
backgroundColor: '#f5f5f7',
});
// 底部固定区域
const BottomFixedContainer = styled(YStack, {
name: 'BottomFixed',
backgroundColor: '#fff',
borderTopWidth: 0.5,
borderTopColor: 'rgba(0, 0, 0, 0.06)',
});
const AnimatedContainer = Animated.createAnimatedComponent(Container);
/**
* 帖子详情页组件
*/
function PostDetailScreenComponent({
visible,
post,
onClose,
headerOffset = 0,
onEditPost,
onPostDeleted,
}: PostDetailScreenProps) {
const insets = useSafeAreaInsets();
const scrollRef = useRef<any>(null);
// 动画状态
const translateY = useSharedValue(SCREEN_HEIGHT);
const opacity = useSharedValue(0);
// 帖子状态（用于点赞/收藏）
const [localPost, setLocalPost] = useState<Post | null>(post);
// 用户信息模态框
const [selectedUser, setSelectedUser] = useState<{
id: string;
username: string;
avatar?: string;
} | null>(null);
// 视频播放器状态
const [videoPlayerVisible, setVideoPlayerVisible] = useState(false);
const [currentVideoUrl, setCurrentVideoUrl] = useState<string>('');
// 当外部 post 变化时同步
useEffect(() => {
setLocalPost(post);
}, [post]);
// 入场/出场 - 无动画，直接显示
useEffect(() => {
if (visible) {
translateY.value = 0;
opacity.value = 1;
} else {
translateY.value = SCREEN_HEIGHT;
opacity.value = 0;
}
}, [visible, translateY, opacity]);
const containerAnimatedStyle = useAnimatedStyle(() => ({
transform: [{ translateY: translateY.value }],
opacity: opacity.value,
}));
// 使用详情页 Hook 管理所有状态和逻辑
const {
comments,
isLoading,
newComment,
replyTarget,
editingComment,
currentUserId,
isPostAuthor,
setNewComment,
setReplyTarget,
submitComment,
toggleCommentLike,
startEditComment,
cancelEditComment,
saveEditComment,
setEditingContent,
deleteComment,
deletePost,
} = usePostDetail({
post,
visible,
onPostDeleted,
});
/**
* 处理编辑帖子
*/
const handleEdit = useCallback(() => {
if (post) {
onEditPost?.(post);
}
}, [post, onEditPost]);
/**
* 滚动到评论区
*/
const scrollToComments = useCallback(() => {
scrollRef.current?.scrollToEnd({ animated: true });
}, []);
/**
* 处理点击评论作者
*/
const handleAuthorPress = useCallback(
(author: { id: string; username: string; avatar?: string }) => {
setSelectedUser(author);
},
[]
);
/**
* 分享帖子
*/
const handleShare = useCallback(() => {
// TODO: 实现分享功能
}, []);
/**
* 点赞帖子
*/
const handleLikePost = useCallback(async () => {
if (!localPost) return;
// 乐观更新 UI
const wasLiked = localPost.isLiked ?? false;
const prevCount = localPost.likesCount ?? 0;
setLocalPost((prev) =>
prev
? {
...prev,
isLiked: !wasLiked,
likesCount: wasLiked ? Math.max(0, prevCount - 1) : prevCount + 1,
}
: null
);
try {
const { data, error } = await supabaseForumService.toggleLike(localPost.id);
if (error) throw error;
if (data) {
setLocalPost((prev) =>
prev
? {
...prev,
isLiked: data.action === 'liked',
likesCount: data.likesCount ?? prev.likesCount,
}
: null
);
}
} catch (error) {
// 出错时回滚
setLocalPost((prev) =>
prev
? {
...prev,
isLiked: wasLiked,
likesCount: prevCount,
}
: null
);
}
}, [localPost]);
/**
* 收藏帖子
*/
const handleBookmark = useCallback(async () => {
if (!localPost) return;
const wasBookmarked = localPost.isFavorited ?? false;
const prevCount = localPost.favoritesCount ?? 0;
setLocalPost((prev) =>
prev
? {
...prev,
isFavorited: !wasBookmarked,
favoritesCount: wasBookmarked ? Math.max(0, prevCount - 1) : prevCount + 1,
}
: null
);
try {
const { data, error } = await supabaseForumService.toggleFavorite(localPost.id);
if (error) throw error;
if (data) {
setLocalPost((prev) =>
prev
? {
...prev,
isFavorited: data.action === 'favorited',
favoritesCount: data.favoritesCount ?? prev.favoritesCount,
}
: null
);
}
} catch (error) {
setLocalPost((prev) =>
prev
? {
...prev,
isFavorited: wasBookmarked,
favoritesCount: prevCount,
}
: null
);
}
}, [localPost]);
// 处理媒体点击（视频播放）
const handleMediaPress = useCallback((media: PostMedia, _index: number) => {
if (media.mediaType === 'video') {
setCurrentVideoUrl(media.fileUrl);
setVideoPlayerVisible(true);
}
}, []);
// 处理 Android 系统返回键
useEffect(() => {
if (!visible) return;
const backHandler = BackHandler.addEventListener('hardwareBackPress', () => {
onClose();
return true;
});
return () => backHandler.remove();
}, [visible, onClose]);
// 不可见时不渲染
if (!visible || !localPost) {
return null;
}
return (
<AnimatedContainer
style={[{ top: headerOffset, paddingTop: insets.top }, containerAnimatedStyle]}
>
<KeyboardAvoidingView
style={{ flex: 1 }}
behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
keyboardVerticalOffset={headerOffset + insets.top}
>
{/* 顶部导航栏 - 极简设计 */}
<PostDetailHeader
isAuthor={isPostAuthor}
onClose={onClose}
onEdit={handleEdit}
onDelete={deletePost}
onShare={handleShare}
/>
{/* 帖子内容区域 */}
<ContentScrollView
ref={scrollRef}
showsVerticalScrollIndicator={false}
contentContainerStyle={{ paddingBottom: 0 }}
>
{/* 媒体画廊 - 全宽沉浸式 */}
{localPost.media && localPost.media.length > 0 && (
<PostMediaGallery media={localPost.media} onMediaPress={handleMediaPress} />
)}
{/* 帖子内容 - 高质量排版 */}
<PostContent post={localPost} />
{/* 操作栏 */}
<PostActions
likeCount={localPost.likesCount || 0}
commentCount={comments.length}
isLiked={localPost.isLiked}
isBookmarked={localPost.isFavorited}
onLike={handleLikePost}
onComment={scrollToComments}
onShare={handleShare}
onBookmark={handleBookmark}
/>
{/* 分隔线 */}
<Divider />
{/* 评论区 */}
<CommentSection
comments={comments}
isLoading={isLoading}
currentUserId={currentUserId}
newComment={newComment}
replyTarget={replyTarget}
editingComment={editingComment}
onCommentChange={setNewComment}
onSubmitComment={submitComment}
onToggleLike={toggleCommentLike}
onSetReplyTarget={setReplyTarget}
onStartEdit={startEditComment}
onSaveEdit={saveEditComment}
onCancelEdit={cancelEditComment}
onEditChange={setEditingContent}
onDeleteComment={deleteComment}
onAuthorPress={handleAuthorPress}
/>
</ContentScrollView>
{/* 固定底部评论输入框 */}
<BottomFixedContainer>
<CommentInput
value={newComment}
onChangeText={setNewComment}
onSubmit={submitComment}
replyTarget={replyTarget}
onCancelReply={() => setReplyTarget(null)}
/>
</BottomFixedContainer>
</KeyboardAvoidingView>
{/* 用户信息模态框 */}
{selectedUser && (
<UserProfileModal
visible={!!selectedUser}
userId={selectedUser.id}
onClose={() => setSelectedUser(null)}
/>
)}
{/* 视频播放器 */}
<VideoPlayer
visible={videoPlayerVisible}
videoUrl={currentVideoUrl}
onClose={() => setVideoPlayerVisible(false)}
/>
</AnimatedContainer>
);
}
export const PostDetailScreen = memo(PostDetailScreenComponent);
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