<?php
// TODO: 点赞数
$sql = "SELECT lw.id, u.username AS author, lw.content, COUNT(c.id) AS likes
        FROM love_wall lw
        LEFT JOIN users u ON lw.user_id = u.id
        LEFT JOIN comments c ON lw.id = c.love_wall_id
        GROUP BY lw.id, u.username, lw.content
        ORDER BY lw.created_at DESC";

$stmt = $pdo->query($sql);
$posts = $stmt->fetchAll();

// 为每个post添加评论
foreach ($posts as &$post) {
    $commentSql = "SELECT c.id, u.username AS author, c.content
                   FROM comments c
                   JOIN users u ON c.user_id = u.id
                   WHERE c.love_wall_id = :love_wall_id";
    $commentStmt = $pdo->prepare($commentSql);
    $commentStmt->execute([':love_wall_id' => $post['id']]);
    $post['comments'] = $commentStmt->fetchAll(PDO::FETCH_ASSOC); // 确保是关联数组
    // TODO: 头像
    $post['avatar'] = '/placeholder.svg?height=40&width=40';

    // 清理不需要的索引
    $post = [
        'id' => $post['id'],
        'author' => $post['author'],
        'avatar' => $post['avatar'],
        'content' => $post['content'],
        'likes' => (int)$post['likes'], // 转换为整数
        'comments' => $post['comments']
    ];
}

echo json_encode($posts, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
?>