// Linux BenchTools - Dashboard Logic

// Access utilities and API
const utils = window.BenchUtils;
const apiClient = window.BenchAPI;

// Global state
let allDevices = [];
let isLoading = false;
let apiToken = null;
let iperfServer = null;

// Load backend config (API token, etc.)
async function loadBackendConfig() {
  try {
    const response = await fetch(`${window.BenchConfig.backendApiUrl}/config`);
    if (response.ok) {
      const config = await response.json();
      apiToken = config.api_token;
      iperfServer = config.iperf_server || '10.0.0.50';
      updateBenchCommandDisplay();
    } else {
      console.error('Failed to load backend config - HTTP', response.status);
      // Set default values to allow the page to render
      apiToken = 'LOADING_ERROR';
      iperfServer = '10.0.0.50';
      updateBenchCommandDisplay();
    }
  } catch (error) {
    console.error('Failed to load backend config:', error);
    // Set default values to allow the page to render
    apiToken = 'LOADING_ERROR';
    iperfServer = '10.0.0.50';
    updateBenchCommandDisplay();
  }
}

// Load dashboard data
async function loadDashboard() {
  if (isLoading) return;

  isLoading = true;
  updateRefreshButton(true);

  try {
    await Promise.all([
      loadStats(),
      loadTopDevices()
    ]);

    // Update last refresh time
    updateLastRefreshTime();

  } catch (error) {
    console.error('Failed to load dashboard:', error);
    utils.showToast('Erreur lors du chargement des données', 'error');
  } finally {
    isLoading = false;
    updateRefreshButton(false);
  }
}

// Update refresh button state
function updateRefreshButton(loading) {
  const btn = document.getElementById('refreshBtn');
  if (!btn) return;

  if (loading) {
    btn.disabled = true;
    btn.innerHTML = '⏳ Chargement...';
  } else {
    btn.disabled = false;
    btn.innerHTML = '🔄 Actualiser';
  }
}

async function backupDatabase() {
  const btn = document.getElementById('backupBtn');
  if (btn) {
    btn.disabled = true;
    btn.textContent = '💾 Backup...';
  }

  try {
    const result = await apiClient.backupDatabase();
    const files = (result.backups || []).map(b => b.filename).join(', ');
    utils.showToast(`Backup créé${files ? `: ${files}` : ''}`, 'success');
  } catch (error) {
    console.error('Backup failed:', error);
    utils.showToast(`Backup échoué: ${error.message}`, 'error');
  } finally {
    if (btn) {
      btn.disabled = false;
      btn.textContent = '💾 Backup DB';
    }
  }
}

// Update last refresh time
function updateLastRefreshTime() {
  const element = document.getElementById('lastUpdate');
  if (!element) return;

  const now = new Date();
  element.textContent = `Mis à jour: ${now.toLocaleTimeString('fr-FR')}`;
}

// Load statistics
async function loadStats() {
  try {
    const devices = await apiClient.getDevices({ page_size: 100 });

    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.ceil(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
      ? utils.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 apiClient.getDevices({ page_size: 50 });

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

    // Store all devices for filtering
    allDevices = data.items;

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

    // Render devices
    renderDevicesTable(sortedDevices);

  } catch (error) {
    console.error('Failed to load devices:', error);
    container.innerHTML = `
      <div class="error" style="text-align: center;">
        <p style="margin-bottom: 1rem;">❌ Impossible de charger les devices</p>
        <p style="font-size: 0.9rem; margin-bottom: 1rem;">${utils.escapeHtml(error.message)}</p>
        <button class="btn btn-primary btn-sm" onclick="loadTopDevices()">🔄 Réessayer</button>
      </div>
    `;
  }
}

// Render devices table
function renderDevicesTable(devices) {
  const container = document.getElementById('devicesTable');

  if (devices.length === 0) {
    container.innerHTML = `
      <div style="text-align: center; padding: 2rem; color: var(--text-secondary);">
        <p>Aucun device trouvé avec ces critères de recherche.</p>
      </div>
    `;
    return;
  }

  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>
          ${devices.map((device, index) => createDeviceRow(device, index + 1)).join('')}
        </tbody>
      </table>
    </div>
  `;
}

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

function buildBenchCommand() {
  const cfg = window.BenchConfig || {};
  const frontendBase = (cfg.frontendBaseUrl || window.location.origin).replace(/\/$/, '');
  const scriptPath = cfg.benchScriptPath || '/scripts/bench.sh';
  const backendBase = (cfg.backendApiUrl || `${window.location.protocol}//${window.location.hostname}:8007/api`).replace(/\/$/, '');
  const token = apiToken || 'LOADING...';
  const iperf = iperfServer || '10.0.0.50';

  // Extract backend URL without /api suffix
  const backendUrl = backendBase.replace(/\/api$/, '');

  return `curl -fsSL ${frontendBase}${scriptPath} | sudo bash -s -- --server ${backendUrl} --token "${token}" --iperf-server ${iperf}`;
}

function updateBenchCommandDisplay() {
  const element = document.getElementById('benchCommand');
  if (!element) return;
  element.textContent = buildBenchCommand();
}

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

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

// Filter devices based on search query
function filterDevices(query) {
  if (!query || query.trim() === '') {
    renderDevicesTable(allDevices);
    return;
  }

  const lowerQuery = query.toLowerCase();
  const filtered = allDevices.filter(device => {
    const hostname = (device.hostname || '').toLowerCase();
    const description = (device.description || '').toLowerCase();
    const location = (device.location || '').toLowerCase();

    return hostname.includes(lowerQuery) ||
           description.includes(lowerQuery) ||
           location.includes(lowerQuery);
  });

  renderDevicesTable(filtered);
}

// Debounced search
const debouncedSearch = utils.debounce((query) => {
  filterDevices(query);
}, 300);

// Handle search input
function handleSearch(event) {
  const query = event.target.value;
  debouncedSearch(query);
}

// Clear search
function clearSearch() {
  const searchInput = document.getElementById('searchInput');
  if (searchInput) {
    searchInput.value = '';
    filterDevices('');
  }
}

// Refresh dashboard manually
function refreshDashboard() {
  if (!isLoading) {
    loadDashboard();
  }
}

// Initialize dashboard on page load
document.addEventListener('DOMContentLoaded', async () => {
  // Load backend config first to get API token
  await loadBackendConfig();

  // Then load dashboard data
  loadDashboard();

  // Setup search input listener
  const searchInput = document.getElementById('searchInput');
  if (searchInput) {
    searchInput.addEventListener('input', handleSearch);
  }

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

// Make functions available globally
window.copyBenchCommand = copyBenchCommand;
window.clearSearch = clearSearch;
window.refreshDashboard = refreshDashboard;