import { useEffect, useState } from 'react';

function PostPage({ id }) {
  const [post, setPost] = useState(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);

  useEffect(() => {
    const controller = new AbortController();

    async function load() {
      setLoading(true);
      setError(null);
      try {
        const res = await fetch(
          `https://jsonplaceholder.typicode.com/posts/${id}`,
          { signal: controller.signal },
        );
        if (!res.ok) throw new Error(`HTTP ${res.status}`);
        setPost(await res.json());
      } catch (e) {
        if (e.name !== 'AbortError') setError(e.message);
      } finally {
        setLoading(false);
      }
    }

    load();
    return () => controller.abort();
  }, [id]);

  if (loading) return <p>Загрузка…</p>;
  if (error) return <p>Ошибка: {error}</p>;
  return <h1>{post.title}</h1>;
}