const json = (d, o) => new Response(JSON.stringify(d), { ...o, headers: { 'Content-Type': 'application/json', ...(o?.headers || {}) } });
const cookie = c => (c.match(/auth_user=([^;]+)/)?.[1] || null);
const hash = c => (c.match(/auth_hash=([^;]+)/)?.[1] || null);
const tsEq=(a,b)=>{if(!a||!b)return!1;let d=a.length^b.length;for(let i=0;i<a.length;i++)d|=a.charCodeAt(i)^b.charCodeAt(i);return d===0};
const clear = ()=>{const o=`Domain=.speech.capital; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT`;return {'Set-Cookie':`auth_user=; ${o}`,'Set-Cookie':`auth_hash=; ${o}`}};

export async function onRequest({ request, env }) {
  const c = request.headers.get('Cookie') || '';
  const u = cookie(c), h = hash(c);
  if (!u || !h) return json({ user: null });

  try {
    const user = await env.D1_SPCHCAP.prepare('SELECT id, username, role, pass_hash FROM users WHERE username = ?').bind(u).first();
    if (user && tsEq(user.pass_hash, h)) return json({ user: { id: user.id, username: user.username, role: user.role } });
    return json({ user: null }, { headers: clear() });
  } catch (e) {
    return json({ error: { message: e.message } }, { status: 500 });
  }
}