"use client";

// 공시(DART) 패널 — news 테이블의 source='dart' 만 골라서 카드 리스트로.
// 별도 백엔드 엔드포인트는 안 만들고 기존 /api/news/{code}?source=dart 재사용.

import { useEffect, useState } from "react";
import { api, type NewsResponse } from "../lib/api";
import { CardHeader } from "./CardHeader";

export function DisclosuresPanel({ code }: { code: string }) {
  const [data, setData] = useState<NewsResponse | null>(null);
  const [err, setErr] = useState<string | null>(null);

  useEffect(() => {
    let alive = true;
    api
      .news(code, 10, "dart")
      .then((r) => {
        if (alive) setData(r);
      })
      .catch((e) => {
        if (alive) setErr(e instanceof Error ? e.message : String(e));
      });
    return () => {
      alive = false;
    };
  }, [code]);

  return (
    <div className="rounded-md border border-zinc-800 bg-zinc-900/40 p-4">
      <CardHeader
        title="공시 (DART)"
        subtitle={data ? `최근 ${data.items.length}건` : ""}
      />

      {err && <div className="text-xs text-red-400">공시 로딩 실패: {err}</div>}
      {!err && !data && <div className="text-xs text-zinc-500">공시 로딩 중…</div>}
      {data && data.items.length === 0 && (
        <div className="text-xs text-zinc-500">최근 공시 없음</div>
      )}

      {data && data.items.length > 0 && (
        <ul className="space-y-2">
          {data.items.map((n, i) => (
            <li key={i}>
              <a
                href={n.url}
                target="_blank"
                rel="noopener noreferrer"
                className="block rounded-md border border-transparent p-2 transition hover:border-zinc-700 hover:bg-zinc-800/40"
              >
                <div className="text-sm leading-snug text-zinc-100 line-clamp-2">
                  {n.title}
                </div>
                <div className="mt-1.5 flex flex-wrap items-center gap-1.5 text-[11px]">
                  <span className="rounded-sm bg-emerald-900/50 px-1.5 py-0.5 font-semibold text-emerald-300">
                    DART
                  </span>
                  {n.published_at && (
                    <span className="text-zinc-500">
                      {formatRelative(n.published_at)}
                    </span>
                  )}
                </div>
              </a>
            </li>
          ))}
        </ul>
      )}
    </div>
  );
}

function formatRelative(iso: string): string {
  try {
    const d = new Date(iso);
    const now = Date.now();
    const diffMin = Math.round((now - d.getTime()) / 60000);
    if (diffMin < 1) return "방금";
    if (diffMin < 60) return `${diffMin}분 전`;
    if (diffMin < 60 * 24) return `${Math.round(diffMin / 60)}시간 전`;
    if (diffMin < 60 * 24 * 7) return `${Math.round(diffMin / (60 * 24))}일 전`;
    return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}`;
  } catch {
    return iso;
  }
}

function pad(n: number): string {
  return n < 10 ? `0${n}` : `${n}`;
}