<?php
// 需要获取的参数
$articleId = isset($_GET['id']) ? sanitizeInput($_GET['id']) : ''; // 文章id

$sql = "SELECT id, title, content, DATE_FORMAT(created_at, '%Y-%m-%d') AS publishDate
        FROM articles
        WHERE id = :id";

$stmt = $pdo->prepare($sql);
$stmt->execute([':id' => $articleId]);
$article = $stmt->fetch();

if ($article) {

    // 查询评论
    $commentSql = "SELECT c.id, u.username AS author, u.email AS avatarUrl, c.content
                   FROM comments c
                   JOIN users u ON c.user_id = u.id
                   WHERE c.article_id = :article_id
                   ORDER BY c.created_at ASC";

    $commentStmt = $pdo->prepare($commentSql);
    $commentStmt->execute([':article_id' => $articleId]);
    $comments = $commentStmt->fetchAll();

    // 构建最终的JSON数据
    $result = [
        'article' => [
            'title' => $article['title'],
            'author' => 'admin', // TODO:
            'publishDate' => $article['publishDate'],
            'content' => $article['content']
        ],
        'comments' => array_map(function ($comment) {
            return [
                'id' => $comment['id'],
                'author' => $comment['author'],
                'avatarUrl' => $comment['avatarUrl'] ? $comment['avatarUrl'] : '/placeholder.svg?height=40&width=40',
                'content' => $comment['content']
            ];
        }, $comments)
    ];

    // 输出JSON
    header('Content-Type: application/json');
    echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
} else {
    echo json_encode(['error' => 'Article not found'], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
}