// Live on-chain payout proof: feed section (if #payoutFeed exists) + timed
// toast pop-ups when payments are seen on the RM Circle contract.
(function(){
  const SCAN='https://polygonscan.com/tx/';
  const TOAST_FRESH_S=15*60;      // toast anything seen on-chain in the last 15 min
  const TOAST_SHOW_MS=8000, TOAST_GAP_MS=2500, TOAST_MAX_QUEUE=5;
  let seen;
  try{seen=new Set(JSON.parse(sessionStorage.getItem('ctb.seenPayouts')||'[]'))}catch(e){seen=new Set()}
  function remember(k){seen.add(k);try{sessionStorage.setItem('ctb.seenPayouts',JSON.stringify([...seen].slice(-300)))}catch(e){}}
  function esc(s){return String(s??'').replace(/[&<>'"]/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;',"'":'&#39;','"':'&quot;'}[c]))}
  function fmtPol(n){return n>=100?n.toFixed(1):n.toFixed(2)}
  function timeAgo(ts){
    if(!ts)return '';
    const s=Math.max(0,Math.floor(Date.now()/1000-ts));
    if(s<60)return 'just now';
    if(s<3600)return Math.floor(s/60)+' min ago';
    if(s<86400)return Math.floor(s/3600)+'h ago';
    return Math.floor(s/86400)+'d ago';
  }

  function verifyHref(p){return p.tx?SCAN+p.tx:'https://polygonscan.com/address/'+(p.toAccount||'0x33BdAEEfd6d17D80aE53816c916dFb26c4fB2DAF')}
  let stack=null;
  function getStack(){
    if(!stack){stack=document.createElement('div');stack.className='pp-stack';document.body.appendChild(stack)}
    return stack;
  }
  const queue=[];let showing=false;
  function enqueue(p){if(queue.length>=TOAST_MAX_QUEUE)return;queue.push(p);if(!showing)showNext()}
  function showNext(){
    const p=queue.shift();
    if(!p){showing=false;return}
    showing=true;
    const el=document.createElement('a');
    el.className='pp-toast';el.href=verifyHref(p);el.target='_blank';el.rel='noopener noreferrer';
    const head=p.kind==='upline'&&p.upgrade
      ?`🚀 Member #${p.upgrade.id} upgraded to ${esc(p.upgrade.levelName)}`
      :`💸 Member #${p.toId} just got paid`;
    const sub=p.kind==='upline'
      ?`${fmtPol(p.pol)} POL paid up to Member #${p.toId}`
      :(p.kind==='referral'?`+${fmtPol(p.pol)} POL · direct referral reward`:`+${fmtPol(p.pol)} POL · ${p.desc||p.levelName||'payout'}`);
    el.innerHTML=`<span class="pp-toast-head">${head}</span><span class="pp-toast-sub">${esc(sub)}</span><span class="pp-toast-verify">${timeAgo(p.ts)} · Verify on Polygonscan ↗</span>`;
    getStack().appendChild(el);
    requestAnimationFrame(()=>el.classList.add('show'));
    setTimeout(()=>{el.classList.remove('show');setTimeout(()=>{el.remove();setTimeout(showNext,TOAST_GAP_MS)},450)},TOAST_SHOW_MS);
  }

  function rowHtml(p){
    const when=timeAgo(p.ts);
    const verify=`<a class="pp-verify" href="${esc(verifyHref(p))}" target="_blank" rel="noopener noreferrer">Verify ↗</a>`;
    if(p.kind==='upline'){
      const up=p.upgrade?`Member #${p.upgrade.id} upgraded to ${esc(p.upgrade.levelName)} — `:'';
      const passed=p.passed&&p.passed.length?`<div class="pp-passed">passed over ${p.passed.map(i=>'#'+i).join(', ')} (not yet at this level)</div>`:'';
      return `<div class="pp-row"><div class="pp-icon">🚀</div><div class="pp-body"><strong>${up}${fmtPol(p.pol)} POL paid up to Member #${p.toId}</strong><div class="pp-meta">Upgrade pass-up · ${esc(p.levelName)} · ${when}</div>${passed}</div>${verify}</div>`;
    }
    const meta=p.kind==='referral'?`Direct referral reward from #${p.fromId}'s entry`:`${esc(p.desc||p.levelName)} — from #${p.fromId}`;
    return `<div class="pp-row"><div class="pp-icon">💸</div><div class="pp-body"><strong>Member #${p.toId} received ${fmtPol(p.pol)} POL</strong><div class="pp-meta">${meta} · ${when}</div></div>${verify}</div>`;
  }
  function render(d){
    const feed=document.getElementById('payoutFeed');
    if(!feed)return;
    const totals=document.getElementById('payoutTotals');
    if(totals&&d.totals)totals.innerHTML=`<div class="fact"><small>Members on-chain</small><strong>${d.totals.members}</strong></div><div class="fact"><small>Payouts recorded</small><strong>${d.totals.payouts}</strong></div><div class="fact"><small>POL paid to members</small><strong>${Math.round(d.totals.pol).toLocaleString()}</strong></div>`;
    if(!d.payouts||!d.payouts.length){feed.innerHTML='<div class="empty">Reading the blockchain… check back in a minute.</div>';return}
    feed.innerHTML=d.payouts.slice(0,12).map(rowHtml).join('');
  }

  async function poll(){
    let d;
    try{const r=await fetch('/api/public/payouts');d=await r.json()}catch(e){return}
    if(!d||!d.payouts)return;
    render(d);
    const now=Date.now()/1000;
    const fresh=d.payouts.filter(p=>p.ts&&(now-p.ts)<TOAST_FRESH_S&&!seen.has(p.key));
    fresh.slice(0,TOAST_MAX_QUEUE).reverse().forEach(p=>{remember(p.key);enqueue(p)});
  }
  poll();
  setInterval(poll,45000);
})();