// npub.cash-Abholung, Stufe 2: bezahlte Quotes bei der Mint einloesen.
// Proofs landen SOFORT in wallet-proofs.json (Platte vor Kontext!).
// Nutzung: node claim.js            — alle bezahlten Quotes einloesen
//          node claim.js balance    — lokale Ecash-Summe zeigen
// Stand Wake 7: lockQuote=false (kein NUT-20 noetig). Mint: minibits.
const fs = require('fs');
const path = require('path');
const { finalizeEvent } = require('nostr-tools');
const { Wallet, MintQuoteState } = require('@cashu/cashu-ts');

const key = JSON.parse(fs.readFileSync(__dirname + '/nostr-key.json', 'utf8'));
const sk = Uint8Array.from(Buffer.from(key.sk_hex, 'hex'));
const BASE = 'https://npubx.cash';
const STORE = path.join(__dirname, 'wallet-proofs.json');

function nip98(url, method) {
  const ev = finalizeEvent({ kind: 27235, created_at: Math.floor(Date.now() / 1000),
    tags: [['u', url], ['method', method]], content: '' }, sk);
  return Buffer.from(JSON.stringify(ev)).toString('base64');
}
function loadStore() {
  try { return JSON.parse(fs.readFileSync(STORE, 'utf8')); }
  catch { return { proofs: [], claimed_quotes: [], mint: null }; }
}
function saveStore(s) { fs.writeFileSync(STORE, JSON.stringify(s, null, 2)); }
function sum(proofs) { return proofs.reduce((a, p) => a + p.amount, 0); }

(async () => {
  const store = loadStore();
  if (process.argv[2] === 'balance') {
    console.log(`Lokal: ${sum(store.proofs)} sat in ${store.proofs.length} Proofs (Mint: ${store.mint || '-'})`);
    return;
  }
  // 1. JWT + Quotes
  const authUrl = `${BASE}/api/v2/auth/nip98`;
  const ar = await fetch(authUrl, { headers: { Authorization: `Nostr ${nip98(authUrl, 'GET')}`, Accept: 'application/json' } });
  if (!ar.ok) throw new Error('auth ' + ar.status);
  const jwt = (await ar.json()).data.token;
  const qr = await fetch(`${BASE}/api/v2/wallet/quotes?offset=0&limit=50`, { headers: { Authorization: `Bearer ${jwt}`, Accept: 'application/json' } });
  if (!qr.ok) throw new Error('quotes ' + qr.status);
  const quotes = (await qr.json()).data.quotes;
  console.log(`Quotes vom Server: ${quotes.length}`);
  const todo = quotes.filter(q => !store.claimed_quotes.includes(q.id));
  if (!todo.length) { console.log('Nichts Neues einzuloesen. Lokal:', sum(store.proofs), 'sat'); return; }
  // 2. Pro Quote: Zustand pruefen, minten
  for (const q of todo) {
    const mintUrl = q.mint_url || 'https://mint.minibits.cash/Bitcoin';
    const wallet = new Wallet(mintUrl);
    await wallet.loadMint();
    const st = await wallet.checkMintQuoteBolt11(q.id);
    console.log(`Quote ${q.id}: ${q.amount} ${q.unit}, Mint-Zustand=${st.state}`);
    if (st.state !== MintQuoteState.PAID) continue;
    const proofs = await wallet.mintProofsBolt11(q.amount, q.id);
    store.proofs.push(...proofs);
    store.claimed_quotes.push(q.id);
    store.mint = mintUrl;
    saveStore(store); // sofort, pro Quote
    console.log(`  -> ${sum(proofs)} sat gemintet und gespeichert. Gesamt lokal: ${sum(store.proofs)} sat`);
  }
})().catch(e => { console.error('FEHLER:', e.message); process.exit(1); });