document.addEventListener('DOMContentLoaded', () => {
  const leaderboardBody = document.getElementById('leaderboard-body');
  let currentLeaderboard = [];
  let previousLeaderboard = [];

  // Carica leaderboard precedente
  try {
    previousLeaderboard = JSON.parse(localStorage.getItem('previousLeaderboard') || '[]');
  } catch(e) {
    previousLeaderboard = [];
  }

  // Genera frecce movimento più eleganti
  function generateMovementArrow(wallet, currentRank) {
    const prevEntry = previousLeaderboard.find(p => p.wallet === wallet);
    
    if (!prevEntry) return '';

    const prevRank = previousLeaderboard.findIndex(p => p.wallet === wallet) + 1;

    if (currentRank < prevRank) {
      return `<svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
        <path d="M12 19V5l-7 7 7-7 7 7z" stroke="green" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
        <text x="50%" y="50%" text-anchor="middle" dy=".3em" fill="green" font-size="8">${prevRank - currentRank}</text>
      </svg>`;
    } else if (currentRank > prevRank) {
      return `<svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
        <path d="M12 5v14l-7-7 7 7 7-7z" stroke="red" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
        <text x="50%" y="50%" text-anchor="middle" dy=".3em" fill="red" font-size="8">${currentRank - prevRank}</text>
      </svg>`;
    }

    return `<svg width="20" height="20" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
      <line x1="12" y1="5" x2="12" y2="19" stroke="gray" stroke-width="2" stroke-linecap="round"/>
    </svg>`;
  }

  // Carica leaderboard
  async function loadLeaderboard() {
    try {
      const response = await fetch('wallet_scores.csv');
      const csvText = await response.text();
      const rows = csvText.trim().split('\n').slice(1);

      currentLeaderboard = rows.map((row, index) => {
        const [wallet, score, synergies] = row.split(',');
        return { 
          wallet, 
          score: parseFloat(score), 
          synergies: parseInt(synergies),
          rank: index + 1
        };
      }).sort((a, b) => b.score - a.score);

      // Salva per prossimo confronto
      localStorage.setItem('previousLeaderboard', JSON.stringify(currentLeaderboard));

      renderLeaderboard();
    } catch (error) {
      console.error('Errore caricamento leaderboard:', error);
    }
  }

  // Rendering leaderboard
  function renderLeaderboard() {
    leaderboardBody.innerHTML = currentLeaderboard.map(entry => `
      <tr>
        <td>${entry.rank}</td>
        <td onclick="showWalletDetails('${entry.wallet}')">
          ${entry.wallet.substr(0,6)}...${entry.wallet.substr(-4)} 
          ${generateMovementArrow(entry.wallet, entry.rank)}
        </td>
        <td>${entry.score.toFixed(2)}</td>
      </tr>
    `).join('');
  }

  // Mostra dettagli wallet
  window.showWalletDetails = function(wallet) {
    // Crea un modal personalizzato
    const modal = document.createElement('div');
    modal.style.cssText = `
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.8);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 1000;
    `;

    const modalContent = document.createElement('div');
    modalContent.style.cssText = `
      background: #1a1a1a;
      padding: 30px;
      border-radius: 10px;
      max-width: 400px;
      width: 90%;
      color: white;
      text-align: center;
    `;

    // Trova i dettagli del wallet
    const walletEntry = currentLeaderboard.find(entry => entry.wallet === wallet);

    if (walletEntry) {
      modalContent.innerHTML = `
        <h2 style="color: #5ba4c2; margin-bottom: 20px;">Wallet Details</h2>
        <p><strong>Address:</strong> ${wallet}</p>
        <p><strong>Rank:</strong> ${walletEntry.rank}</p>
        <p><strong>Score:</strong> ${walletEntry.score.toFixed(2)}</p>
        <p><strong>Synergies:</strong> ${walletEntry.synergies}</p>
        <button onclick="this.closest('div').parentNode.remove()" 
          style="
            background-color: #5ba4c2;
            color: black;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            margin-top: 20px;
            cursor: pointer;
          ">Close</button>
      `;
    } else {
      modalContent.innerHTML = `
        <h2 style="color: #5ba4c2;">Wallet Not Found</h2>
        <button onclick="this.closest('div').parentNode.remove()" 
          style="
            background-color: #5ba4c2;
            color: black;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            margin-top: 20px;
            cursor: pointer;
          ">Close</button>
      `;
    }

    modal.appendChild(modalContent);
    document.body.appendChild(modal);
  }

  // Funzione di ricerca wallet
  window.filterWallet = function() {
    const walletInput = document.getElementById('walletInput').value.toLowerCase();
    
    // Se input vuoto, mostra intera leaderboard
    if (!walletInput) {
      renderLeaderboard();
      return;
    }

    const filteredLeaderboard = currentLeaderboard.filter(entry => 
      entry.wallet.toLowerCase().includes(walletInput)
    );

    // Rendering leaderboard filtrata
    leaderboardBody.innerHTML = filteredLeaderboard.map(entry => `
      <tr>
        <td>${entry.rank}</td>
        <td onclick="showWalletDetails('${entry.wallet}')">
          ${entry.wallet.substr(0,6)}...${entry.wallet.substr(-4)} 
          ${generateMovementArrow(entry.wallet, entry.rank)}
        </td>
        <td>${entry.score.toFixed(2)}</td>
      </tr>
    `).join('');
  }

  // Carica la leaderboard all'avvio
  loadLeaderboard();

  // Aggiorna periodicamente la leaderboard (ogni 5 minuti)
  setInterval(loadLeaderboard, 5 * 60 * 1000);
});