// Landing page: live ladder, buy buttons, sponsor attribution line.
(async function () {
  await IAP.renderNav('home');
  const c = await IAP.getConfig();
  IAP.$('contractLink').href = c.explorer + '/address/' + c.contract;

  const sp = await (await fetch('/api/sponsor')).json();
  if (sp.invited) {
    const el = IAP.$('sponsorLine');
    el.hidden = false;
    el.textContent = (sp.sponsorId ? 'You were invited by member #' + sp.sponsorId + '.' : 'You arrived through a member’s invite.')
      + ' Your purchases pay their team, and your own link will do the same for you.';
  }

  async function loadLadder() {
    const { products } = await (await fetch('/api/catalog')).json();
    const wrap = document.getElementById('tiles');
    wrap.innerHTML = '';
    const NAMES = { 1: 'Micro', 2: 'Activation', 3: 'Builder', 4: 'Growth', 5: 'Leader' };
    for (const p of products) {
      const bonus = p.creditAmount - p.priceCents; // credits above 1cr/cent = bulk bonus
      const div = document.createElement('div');
      div.className = 'tile' + (p.priceCents === 5000 ? ' hot' : '');
      div.innerHTML = '<div class="name">' + (NAMES[p.id] || 'Package ' + p.id) + '</div>'
        + '<div class="price">$' + Math.round(p.priceCents / 100) + '</div>'
        + '<div class="cr">' + p.creditAmount.toLocaleString() + ' credits</div>'
        + '<div class="bonus">' + (bonus > 0 ? '+' + bonus.toLocaleString() + ' bonus credits' : '&nbsp;') + '</div>'
        + '<div class="pol">' + (p.costWei ? IAP.fmtPol(p.costWei) + ' POL right now' : 'paused') + '</div>'
        + '<button class="btn small" data-id="' + p.id + '" data-cost="' + (p.costWei || '') + '"'
        + (p.costWei ? '' : ' disabled') + '>Buy</button>';
      wrap.appendChild(div);
    }
    wrap.querySelectorAll('button[data-id]').forEach(b => b.addEventListener('click', () => buyPack(b)));
  }
  async function buyPack(btn) {
    try {
      btn.disabled = true;
      // email members get their wallet linked to the account at buy time
      const me = await (await fetch('/api/me')).json();
      if (me.signedIn && me.email && !me.address) {
        IAP.status('First, a free signature links your wallet to your account…');
        await IAPWallet.signIn();
      }
      IAP.status('Confirm the purchase in your wallet…');
      // resolve the sponsor at buy time: a code referrer who activated since
      // page load still gets locked in
      const spNow = await (await fetch('/api/sponsor')).json();
      const r = await IAPWallet.buy(Number(btn.dataset.id), spNow.sponsorId || 0, btn.dataset.cost);
      if (r.receipt.status !== '0x1') throw new Error('Transaction reverted. Check the explorer.');
      IAP.status('Purchase settled on-chain. Credits are yours, payouts delivered. Watch it on the ledger.', 'ok');
      IAP.refreshNavWallet();
    } catch (e) {
      IAP.status('Purchase failed: ' + (e.message || e), 'bad');
    } finally { btn.disabled = false; }
  }
  async function loadStats() {
    try {
      const s = await (await fetch('/api/stats')).json();
      IAP.$('stMembers').textContent = (s.onchainMembers || 0).toLocaleString();
      IAP.$('stPurchases').textContent = (s.purchases || 0).toLocaleString();
      IAP.$('stPaid').textContent = IAP.fmtPol(s.paidInWei || '0');
      IAP.$('stPayouts').textContent = (s.payouts || 0).toLocaleString();
    } catch (e) {}
  }
  async function loadTicker() {
    try {
      const { events } = await (await fetch('/api/feed?n=30')).json();
      if (!events.length) return;
      const inner = IAP.$('tickerInner');
      inner.innerHTML = events.map(ev => '<span>' + IAP.describeEvent(ev, c) + '</span>').join('');
      IAP.$('ticker').hidden = false;
    } catch (e) {}
  }
  // level cycler: chips + generation highlighting + auto-advance
  const LVL = {
    1: { pct: '50%', desc: 'Level 1 is open to every member: your direct referrals each pay you 50 percent of every package they ever buy, straight to your wallet.' },
    2: { pct: '20%', desc: 'Bring 2 buyers of $20 or more and level 2 unlocks: 20 percent of every package your referrals’ referrals buy, on every purchase, forever.' },
    3: { pct: '10%', desc: 'At 5 qualifying buyers, level 3 opens the third generation: 10 percent of everything they buy. Eight positions deep in this picture, and it keeps growing.' }
  };
  const viz = document.getElementById('genViz');
  if (viz) {
    const chips = [...document.querySelectorAll('.chips [data-lvl]')];
    const setLvl = n => {
      viz.dataset.lvl = n;
      document.getElementById('vizPct').textContent = LVL[n].pct;
      document.getElementById('lvlDesc').textContent = LVL[n].desc;
      chips.forEach(ch => ch.classList.toggle('on', ch.dataset.lvl === String(n)));
    };
    let cur = 1;
    let auto = null;
    if (!matchMedia('(prefers-reduced-motion: reduce)').matches) {
      auto = setInterval(() => { cur = cur % 3 + 1; setLvl(cur); }, 4200);
    }
    chips.forEach(ch => ch.addEventListener('click', () => {
      if (auto) { clearInterval(auto); auto = null; } // a click takes the wheel
      cur = Number(ch.dataset.lvl);
      setLvl(cur);
    }));
  }

  // what-if calculator: pure arithmetic on the locked constants
  const dc = document.getElementById('dcDirects');
  if (dc) {
    const $id = x => document.getElementById(x);
    const usd = n => '$' + n.toLocaleString(undefined, { maximumFractionDigits: 2 });
    const recalc = () => {
      const d = Number($id('dcDirects').value);
      const p = Number($id('dcPkg').value);
      const r = Number($id('dcSpread').value);
      $id('dcDirectsV').textContent = d;
      $id('dcSpreadV').textContent = r;
      const qualifies = p >= 20; // sub-$20 packages never count toward qualification
      const l2open = qualifies && d >= 2;
      const l3open = qualifies && d >= 5;
      const g2 = d * r, g3 = g2 * r;
      const e1 = d * p * 0.5;
      const e2 = l2open ? g2 * p * 0.2 : 0;
      const e3 = l3open ? g3 * p * 0.1 : 0;
      $id('dcN1').textContent = d; $id('dcN2').textContent = g2; $id('dcN3').textContent = g3;
      $id('dcE1').textContent = usd(e1);
      $id('dcE2').textContent = l2open ? usd(e2) : 'passes up';
      $id('dcE3').textContent = l3open ? usd(e3) : 'passes up';
      $id('dcTotal').textContent = usd(e1 + e2 + e3);
      const setB = (el, open, need) => { el.textContent = open ? 'open' : 'locked: ' + need; el.className = 'badge' + (open ? '' : ' amber'); };
      setB($id('dcB1'), true, '');
      setB($id('dcB2'), l2open, qualifies ? (2 - d) + ' more buyer(s)' : 'needs $20+ buyers');
      setB($id('dcB3'), l3open, qualifies ? (5 - d) + ' more buyer(s)' : 'needs $20+ buyers');
      $id('dcQualNote').textContent = qualifies
        ? 'Buyers of $20 or more count toward your qualification. 2 unlock level 2, 5 unlock level 3.'
        : 'Heads up: $5 packages pay your level 1 but do not qualify buyers, so levels 2 and 3 stay locked in this scenario.';
    };
    ['dcDirects', 'dcPkg', 'dcSpread'].forEach(x => $id(x).addEventListener('input', recalc));
    recalc();
  }

  loadLadder();
  loadStats();
  loadTicker();
  setInterval(loadStats, 60000);
})();