(function() {
  var C = window.ExplorerCommon;

  var state = { tab: 'fungible' };

  function switchTab(name) {
    state.tab = name;
    document.getElementById('paneFungible').style.display = name === 'fungible' ? '' : 'none';
    document.getElementById('paneNFT').style.display      = name === 'nft'      ? '' : 'none';
    document.getElementById('tabFungible').className = 'tx-tab' + (name === 'fungible' ? ' tx-tab-active' : '');
    document.getElementById('tabNFT').className      = 'tx-tab' + (name === 'nft'      ? ' tx-tab-active' : '');
  }

  /* ── Fungible tokens ─────────────────────────────────────────────────────── */

  function formatSupply(supply, decimals) {
    if (decimals === 0) return supply.toLocaleString();
    var d = Math.pow(10, decimals);
    var whole = Math.floor(supply / d);
    var frac  = supply % d;
    if (frac === 0) return whole.toLocaleString();
    return whole.toLocaleString() + '.' + String(frac).padStart(decimals, '0').replace(/0+$/, '');
  }

  async function loadTokens() {
    C.setStatus('Loading…', 'warn');
    try {
      var data = await C.fetchJSON('/api/tokens');
      var tokens = (data && Array.isArray(data.tokens)) ? data.tokens : [];
      document.getElementById('tokenCount').textContent = tokens.length;

      var tbody = document.getElementById('tokenBody');
      if (!tokens.length) {
        tbody.innerHTML = '<tr><td colspan="7" class="tbl-empty">No fungible tokens issued yet.</td></tr>';
      } else {
        var rows = '';
        tokens.forEach(function(t, i) {
          var supply = formatSupply(t.total_supply || 0, t.decimals || 0);
          rows +=
            '<tr>' +
            '<td class="text-muted" style="font-size:12px">' + (i+1) + '</td>' +
            '<td>' +
              '<a href="/token?id=' + encodeURIComponent(t.token_id) + '" class="token-sym">' +
                C.esc(t.symbol) +
              '</a>' +
            '</td>' +
            '<td>' + C.esc(t.name) + '</td>' +
            '<td class="mono text-muted">' + (t.decimals || 0) + '</td>' +
            '<td class="mono">' + C.esc(supply) + '</td>' +
            '<td>' +
              '<a href="/address?address=' + encodeURIComponent(t.issuer) + '" class="mono" style="font-size:12px">' +
                C.short(t.issuer, 20) +
              '</a>' +
            '</td>' +
            '<td class="mono text-muted" style="font-size:12px">' + (t.issued_at || 0) + '</td>' +
            '</tr>';
        });
        tbody.innerHTML = rows;
      }
      C.refreshIcons();
    } catch(e) {
      C.setStatus('Load failed: ' + e.message, 'err');
    }
  }

  /* ── NFTs ────────────────────────────────────────────────────────────────── */

  async function loadNFTs() {
    try {
      var data = await C.fetchJSON('/api/nfts');
      var nfts = (data && Array.isArray(data.nfts)) ? data.nfts : [];
      document.getElementById('nftCount').textContent = nfts.length;

      var grid  = document.getElementById('nftGrid');
      var empty = document.getElementById('nftEmpty');
      if (!nfts.length) {
        grid.innerHTML = '';
        empty.style.display = '';
        return;
      }
      empty.style.display = 'none';

      var cards = '';
      nfts.forEach(function(n) {
        var burned = n.burned ? ' nft-card-burned' : '';
        var imgHtml = '';
        if (n.uri && /\.(png|jpg|jpeg|gif|svg|webp)/i.test(n.uri)) {
          imgHtml = '<img class="nft-card-img" src="' + C.esc(n.uri) + '" alt="" loading="lazy">';
        } else {
          imgHtml = '<div class="nft-card-img nft-card-placeholder"><i data-lucide="image"></i></div>';
        }
        cards +=
          '<a class="nft-card' + burned + '" href="/token?nft=' + encodeURIComponent(n.nft_id) + '">' +
          imgHtml +
          '<div class="nft-card-body">' +
            '<div class="nft-card-name">' + C.esc(n.name) + (n.burned ? ' <span class="badge-burned">BURNED</span>' : '') + '</div>' +
            '<div class="nft-card-id mono">' + C.short(n.nft_id, 16) + '</div>' +
            (n.owner ? '<div class="nft-card-owner text-muted">Owner: ' + C.short(n.owner, 16) + '</div>' : '') +
          '</div>' +
          '</a>';
      });
      grid.innerHTML = cards;
      C.refreshIcons();
    } catch(e) {
      document.getElementById('nftCount').textContent = '?';
    }
  }

  /* ── Boot ────────────────────────────────────────────────────────────────── */

  document.getElementById('tabFungible').addEventListener('click', function() { switchTab('fungible'); });
  document.getElementById('tabNFT').addEventListener('click', function() { switchTab('nft'); });
  document.getElementById('refreshBtn').addEventListener('click', function() { loadTokens(); loadNFTs(); });

  // Check URL hash for tab.
  if (window.location.hash === '#nft') switchTab('nft');

  Promise.all([loadTokens(), loadNFTs()]).then(function() {
    C.setStatus('', '');
  });
})();