// Enhanced Peers UI functions

let peerChart = null;

// Render peers list - uses generic pagination system
async function renderPeers() {
  if (window.genericFetch) {
    await window.genericFetch('peers', true);
  }
  renderPeerGraph();
}

// Filter peers - uses generic filter system
function filterPeers() {
  if (window.genericFilter) {
    window.genericFilter('peers');
  }
}

// Show peer details modal
async function showPeerDetails(peerId) {
  try {
    const [peerRes, historyRes] = await Promise.all([
      fetch(`/api/peers/${encodeURIComponent(peerId)}`),
      fetch(`/api/peers/${encodeURIComponent(peerId)}/history`)
    ]);
    
    if (!peerRes.ok || !historyRes.ok) {
      throw new Error('Failed to fetch peer details');
    }
    
    const peer = await peerRes.json();
    const history = await historyRes.json();
    
    const modal = document.getElementById('peerDetailsModal');
    if (!modal) return;
    
    const content = document.getElementById('peer-details-content');
    if (!content) return;
    
    const uptime = peer.uptime ? (window.formatUptime ? window.formatUptime(peer.uptime) : `${Math.floor(peer.uptime / 1000)}s`) : 'N/A';
    const connectTime = peer.connectTime ? new Date(peer.connectTime).toLocaleString() : 'N/A';
    const lastSeen = peer.metrics?.lastSeen ? new Date(peer.metrics.lastSeen).toLocaleString() : 'N/A';
    
    content.innerHTML = `
      <div class="space-y-4">
        <div>
          <h4 class="font-semibold mb-2">Peer Information</h4>
          <div class="bg-gray-100 dark:bg-gray-700 p-3 rounded">
            <p><strong>ID:</strong> <span class="font-mono text-sm break-all">${peer.id}</span></p>
            <p><strong>Status:</strong> ${peer.connected ? '<span class="text-green-600">Connected</span>' : '<span class="text-gray-600">Disconnected</span>'}</p>
            <p><strong>Uptime:</strong> ${uptime}</p>
            <p><strong>Connected At:</strong> ${connectTime}</p>
            <p><strong>Blocked:</strong> ${peer.isBlocked ? '<span class="text-red-600">Yes</span>' : '<span class="text-green-600">No</span>'}</p>
          </div>
        </div>
        
        <div>
          <h4 class="font-semibold mb-2">Metrics</h4>
          <div class="bg-gray-100 dark:bg-gray-700 p-3 rounded">
            <p><strong>Total Connections:</strong> ${peer.metrics?.connections || 0}</p>
            <p><strong>Total Duration:</strong> ${peer.metrics?.totalDuration ? (window.formatDuration ? window.formatDuration(peer.metrics.totalDuration) : `${Math.floor(peer.metrics.totalDuration / 1000)}s`) : '0s'}</p>
            <p><strong>Average Duration:</strong> ${peer.metrics?.avgDuration ? (window.formatDuration ? window.formatDuration(peer.metrics.avgDuration) : `${Math.floor(peer.metrics.avgDuration / 1000)}s`) : 'N/A'}</p>
            <p><strong>Last Seen:</strong> ${lastSeen}</p>
          </div>
        </div>
        
        <div>
          <h4 class="font-semibold mb-2">Connection History (Last 50)</h4>
          <div class="bg-gray-100 dark:bg-gray-700 p-3 rounded max-h-64 overflow-y-auto">
            ${history.length === 0 
              ? '<p class="text-gray-500">No history available</p>'
              : history.slice(-50).reverse().map(event => `
                <div class="mb-2 pb-2 border-b border-gray-300 dark:border-gray-600">
                  <div class="flex justify-between">
                    <span class="font-semibold ${event.type === 'connect' ? 'text-green-600' : 'text-red-600'}">${event.type === 'connect' ? 'Connected' : 'Disconnected'}</span>
                    <span class="text-sm text-gray-600 dark:text-gray-400">${new Date(event.timestamp).toLocaleString()}</span>
                  </div>
                  ${event.duration ? `<div class="text-sm text-gray-600 dark:text-gray-400">Duration: ${window.formatDuration ? window.formatDuration(event.duration) : `${Math.floor(event.duration / 1000)}s`}</div>` : ''}
                  ${event.error ? `<div class="text-sm text-red-600">Error: ${event.error}</div>` : ''}
                </div>
              `).join('')
            }
          </div>
        </div>
      </div>
    `;
    
    modal.showModal();
  } catch (err) {
    console.error('Failed to fetch peer details:', err);
    if (window.showNotification) window.showNotification('Failed to load peer details: ' + err.message, 'error');
  }
}

// Block peer
async function blockPeer(peerId) {
  if (window.showConfirm) {
    window.showConfirm(`Block peer ${peerId.substring(0, 16)}...?`, async () => {
      try {
        const response = await fetch(`/api/peers/${encodeURIComponent(peerId)}/block`, {
          method: 'POST'
        });
        if (!response.ok) {
          throw new Error('Failed to block peer');
        }
        if (window.showNotification) window.showNotification('Peer blocked successfully');
        await renderPeers();
      } catch (err) {
        console.error('Failed to block peer:', err);
        if (window.showNotification) window.showNotification('Failed to block peer: ' + err.message, 'error');
      }
    });
  }
}

// Unblock peer
async function unblockPeer(peerId) {
  if (window.showConfirm) {
    window.showConfirm(`Unblock peer ${peerId.substring(0, 16)}...?`, async () => {
      try {
        const response = await fetch(`/api/peers/${encodeURIComponent(peerId)}/unblock`, {
          method: 'POST'
        });
        if (!response.ok) {
          throw new Error('Failed to unblock peer');
        }
        if (window.showNotification) window.showNotification('Peer unblocked successfully');
        await renderPeers();
      } catch (err) {
        console.error('Failed to unblock peer:', err);
        if (window.showNotification) window.showNotification('Failed to unblock peer: ' + err.message, 'error');
      }
    });
  }
}

// Render peer connection graph
function renderPeerGraph() {
  const canvas = document.getElementById('peer-graph-chart');
  if (!canvas) return;
  
  const ctx = canvas.getContext('2d');
  
  if (peerChart) {
    peerChart.destroy();
  }
  
  // Get peers data from global state
  const peersData = window.peersData || [];
  
  // Group peers by connection status over time (simplified - using current data)
  const connected = peersData.filter(p => p.connected).length;
  const disconnected = peersData.filter(p => !p.connected).length;
  const blocked = peersData.filter(p => p.isBlocked).length;
  
  peerChart = new Chart(ctx, {
    type: 'doughnut',
    data: {
      labels: ['Connected', 'Disconnected', 'Blocked'],
      datasets: [{
        data: [connected, disconnected, blocked],
        backgroundColor: [
          'rgb(34, 197, 94)',
          'rgb(107, 114, 128)',
          'rgb(239, 68, 68)'
        ]
      }]
    },
    options: {
      responsive: true,
      maintainAspectRatio: false,
      plugins: {
        legend: {
          position: 'bottom',
          labels: {
            color: '#f1f5f9' // White text for better readability on dark background
          }
        }
      }
    }
  });
}

// Make functions globally accessible
window.renderPeers = renderPeers;
window.showPeerDetails = showPeerDetails;
window.blockPeer = blockPeer;
window.unblockPeer = unblockPeer;
window.filterPeers = filterPeers;