// Linux BenchTools - Dashboard Logic

const { formatDate, formatRelativeTime, createScoreBadge, getScoreBadgeText, escapeHtml, showError, showEmptyState, copyToClipboard, showToast } = window.BenchUtils;
const api = window.BenchAPI;

// Load dashboard data
async function loadDashboard() {
  try {
    await Promise.all([
      loadStats(),
      loadTopDevices()
    ]);
  } catch (error) {
    console.error('Failed to load dashboard:', error);
  }
}

// Load statistics
async function loadStats() {
  try {
    const devices = await api.getDevices({ page_size: 1000 });

    const totalDevices = devices.total || 0;
    let totalBenchmarks = 0;
    let scoreSum = 0;
    let scoreCount = 0;
    let lastBenchDate = null;

    // Calculate stats from devices
    devices.items.forEach(device => {
      if (device.last_benchmark) {
        totalBenchmarks++;

        if (device.last_benchmark.global_score !== null) {
          scoreSum += device.last_benchmark.global_score;
          scoreCount++;
        }

        const benchDate = new Date(device.last_benchmark.run_at);
        if (!lastBenchDate || benchDate > lastBenchDate) {
          lastBenchDate = benchDate;
        }
      }
    });

    const avgScore = scoreCount > 0 ? Math.round(scoreSum / scoreCount) : 0;

    // Update UI
    document.getElementById('totalDevices').textContent = totalDevices;
    document.getElementById('totalBenchmarks').textContent = totalBenchmarks;
    document.getElementById('avgScore').textContent = avgScore;
    document.getElementById('lastBench').textContent = lastBenchDate
      ? formatRelativeTime(lastBenchDate.toISOString())
      : 'Aucun';

  } catch (error) {
    console.error('Failed to load stats:', error);
    // Set default values on error
    document.getElementById('totalDevices').textContent = '0';
    document.getElementById('totalBenchmarks').textContent = '0';
    document.getElementById('avgScore').textContent = '0';
    document.getElementById('lastBench').textContent = 'N/A';
  }
}

// Load top devices
async function loadTopDevices() {
  const container = document.getElementById('devicesTable');

  try {
    const data = await api.getDevices({ page_size: 50 });

    if (!data.items || data.items.length === 0) {
      showEmptyState(container, 'Aucun device trouvé. Exécutez un benchmark sur une machine pour commencer.', '📊');
      return;
    }

    // Sort by global_score descending
    const sortedDevices = data.items.sort((a, b) => {
      const scoreA = a.last_benchmark?.global_score ?? -1;
      const scoreB = b.last_benchmark?.global_score ?? -1;
      return scoreB - scoreA;
    });

    // Generate table HTML
    container.innerHTML = `
      <div class="table-wrapper">
        <table>
          <thead>
            <tr>
              <th>#</th>
              <th>Hostname</th>
              <th>Description</th>
              <th>Score Global</th>
              <th>CPU</th>
              <th>MEM</th>
              <th>DISK</th>
              <th>NET</th>
              <th>GPU</th>
              <th>Dernier Bench</th>
              <th>Action</th>
            </tr>
          </thead>
          <tbody>
            ${sortedDevices.map((device, index) => createDeviceRow(device, index + 1)).join('')}
          </tbody>
        </table>
      </div>
    `;

  } catch (error) {
    console.error('Failed to load devices:', error);
    showError(container, 'Impossible de charger les devices. Vérifiez que le backend est accessible.');
  }
}

// Create device row HTML
function createDeviceRow(device, rank) {
  const bench = device.last_benchmark;

  const globalScore = bench?.global_score;
  const cpuScore = bench?.cpu_score;
  const memScore = bench?.memory_score;
  const diskScore = bench?.disk_score;
  const netScore = bench?.network_score;
  const gpuScore = bench?.gpu_score;
  const runAt = bench?.run_at;

  const globalScoreHtml = globalScore !== null && globalScore !== undefined
    ? `<span class="${window.BenchUtils.getScoreBadgeClass(globalScore)}">${getScoreBadgeText(globalScore)}</span>`
    : '<span class="badge">N/A</span>';

  return `
    <tr onclick="window.location.href='device_detail.html?id=${device.id}'">
      <td><strong>${rank}</strong></td>
      <td>
        <strong style="color: var(--color-success);">${escapeHtml(device.hostname)}</strong>
      </td>
      <td style="color: var(--text-secondary);">
        ${escapeHtml(device.description || 'Aucune description')}
      </td>
      <td>${globalScoreHtml}</td>
      <td><span class="${window.BenchUtils.getScoreBadgeClass(cpuScore)}">${getScoreBadgeText(cpuScore)}</span></td>
      <td><span class="${window.BenchUtils.getScoreBadgeClass(memScore)}">${getScoreBadgeText(memScore)}</span></td>
      <td><span class="${window.BenchUtils.getScoreBadgeClass(diskScore)}">${getScoreBadgeText(diskScore)}</span></td>
      <td><span class="${window.BenchUtils.getScoreBadgeClass(netScore)}">${getScoreBadgeText(netScore)}</span></td>
      <td><span class="${window.BenchUtils.getScoreBadgeClass(gpuScore)}">${getScoreBadgeText(gpuScore)}</span></td>
      <td style="color: var(--text-secondary); font-size: 0.85rem;">
        ${runAt ? formatRelativeTime(runAt) : 'Jamais'}
      </td>
      <td>
        <a href="device_detail.html?id=${device.id}" class="btn btn-sm btn-primary">Voir</a>
      </td>
    </tr>
  `;
}

// Copy bench command to clipboard
async function copyBenchCommand() {
  const command = document.getElementById('benchCommand').textContent;
  const success = await copyToClipboard(command);

  if (success) {
    showToast('Commande copiée dans le presse-papier !', 'success');
  } else {
    showToast('Erreur lors de la copie', 'error');
  }
}

// Initialize dashboard on page load
document.addEventListener('DOMContentLoaded', () => {
  loadDashboard();

  // Refresh every 30 seconds
  setInterval(loadDashboard, 30000);
});

// Make copyBenchCommand available globally
window.copyBenchCommand = copyBenchCommand;