/**
 * Utility functions for domain consensus plugin
 */

/**
 * Format a timestamp to human-readable string
 */
function formatTimestamp(timestamp) {
  if (!timestamp) return 'Never';
  const date = new Date(timestamp);
  const now = new Date();
  const diff = now - date;
  
  if (diff < 60000) {
    return `${Math.floor(diff / 1000)}s ago`;
  } else if (diff < 3600000) {
    return `${Math.floor(diff / 60000)}m ago`;
  } else if (diff < 86400000) {
    return `${Math.floor(diff / 3600000)}h ago`;
  } else {
    return date.toLocaleString();
  }
}

/**
 * Format a peer ID to shortened version
 */
function formatPeerId(peerId) {
  if (!peerId) return 'N/A';
  if (peerId.length <= 16) return peerId;
  return `${peerId.slice(0, 8)}...${peerId.slice(-8)}`;
}

/**
 * Format a hash to shortened version
 */
function formatHash(hash) {
  if (!hash) return 'N/A';
  if (hash.length <= 20) return hash;
  return `${hash.slice(0, 10)}...${hash.slice(-10)}`;
}

/**
 * Get status badge class based on consensus status
 */
function getStatusBadgeClass(status) {
  switch (status) {
    case 'resolved':
      return 'status-badge resolved';
    case 'insufficient_quorum':
      return 'status-badge insufficient_quorum';
    case 'tie':
      return 'status-badge tie';
    case 'no_claims':
      return 'status-badge no_claims';
    case 'error':
      return 'status-badge error';
    default:
      return 'status-badge no_claims';
  }
}

/**
 * Get status text for consensus status
 */
function getStatusText(status) {
  switch (status) {
    case 'resolved':
      return 'Resolved';
    case 'insufficient_quorum':
      return 'Insufficient Quorum';
    case 'tie':
      return 'Tie';
    case 'no_claims':
      return 'No Claims';
    case 'error':
      return 'Error';
    default:
      return 'Unknown';
  }
}

/**
 * Get status color for consensus status
 */
function getStatusColor(status) {
  switch (status) {
    case 'resolved':
      return '#10b981'; // green-500
    case 'insufficient_quorum':
      return '#eab308'; // yellow-500
    case 'tie':
      return '#f97316'; // orange-500
    case 'no_claims':
      return '#6b7280'; // gray-500
    case 'error':
      return '#ef4444'; // red-500
    default:
      return '#6b7280'; // gray-500
  }
}

/**
 * Calculate quorum percentage
 */
function calculateQuorumPercentage(totalVotes, minVotes) {
  if (minVotes === 0) return 0;
  return Math.min(100, Math.round((totalVotes / minVotes) * 100));
}

/**
 * Escape HTML to prevent XSS
 */
function escapeHtml(text) {
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}

/**
 * Copy text to clipboard
 */
async function copyToClipboard(text) {
  try {
    await navigator.clipboard.writeText(text);
    return true;
  } catch (err) {
    // Fallback for older browsers
    const textArea = document.createElement('textarea');
    textArea.value = text;
    textArea.style.position = 'fixed';
    textArea.style.opacity = '0';
    document.body.appendChild(textArea);
    textArea.select();
    try {
      document.execCommand('copy');
      document.body.removeChild(textArea);
      return true;
    } catch (err) {
      document.body.removeChild(textArea);
      return false;
    }
  }
}

/**
 * Debounce function
 */
function debounce(func, wait) {
  let timeout;
  return function executedFunction(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
}

/**
 * Format number with commas
 */
function formatNumber(num) {
  if (num === null || num === undefined) return '0';
  return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}

/**
 * Create a progress bar element
 */
function createProgressBar(percentage, color = '#3b82f6') {
  const bar = document.createElement('div');
  bar.className = 'w-full progress-bar-container';
  bar.innerHTML = `
    <div class="progress-bar" style="width: ${percentage}%; background-color: ${color};"></div>
  `;
  return bar;
}

/**
 * Update sidebar stats (can be called from any view)
 */
async function updateSidebarStats() {
  try {
    // Fetch overview and peers data to get stats
    const [overviewData, peersData] = await Promise.all([
      window.apiClient.getOverview(),
      window.apiClient.getPeers()
    ]);

    const stats = overviewData.stats || {};
    const activePeers = peersData.activePeers || 0;

    const totalDomainsEl = document.getElementById('statTotalDomains');
    const resolvedEl = document.getElementById('statResolved');
    const activePeersEl = document.getElementById('statActivePeers');

    if (totalDomainsEl) totalDomainsEl.textContent = formatNumber(stats.totalDomains || 0);
    if (resolvedEl) resolvedEl.textContent = formatNumber(stats.resolved || 0);
    if (activePeersEl) activePeersEl.textContent = formatNumber(activePeers);
  } catch (error) {
    console.error('Error updating sidebar stats:', error);
    // Set to 0 on error
    const totalDomainsEl = document.getElementById('statTotalDomains');
    const resolvedEl = document.getElementById('statResolved');
    const activePeersEl = document.getElementById('statActivePeers');
    if (totalDomainsEl) totalDomainsEl.textContent = '0';
    if (resolvedEl) resolvedEl.textContent = '0';
    if (activePeersEl) activePeersEl.textContent = '0';
  }
}

/**
 * Export functions
 */
window.utils = {
  formatTimestamp,
  formatPeerId,
  formatHash,
  getStatusBadgeClass,
  getStatusText,
  getStatusColor,
  calculateQuorumPercentage,
  escapeHtml,
  copyToClipboard,
  debounce,
  formatNumber,
  createProgressBar,
  updateSidebarStats
};