{% extends "base.html" %}
{% block title %}Security Command Center — Ain El Aql{% endblock %}

{% block head_extra %}
<style>
  /* Premium Red override for Unregistered */
  .status-pill.guest {
    background: rgba(239, 68, 68, 0.15) !important;
    color: #ef4444 !important;
    border: 1px solid rgba(239, 68, 68, 0.3) !important;
  }

  .form-control-glass {
    background: rgba(0, 0, 0, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 0.5rem;
    width: 100%;
  }

  .form-control-glass option {
    background: #1a2236;
    color: white;
  }
</style>
{% endblock %}

{% block body %}
<div class="app-layout">
  {% with role='security', active='dashboard' %}
  {% include "partials/sidebar.html" %}
  {% endwith %}

  <main class="main-content">
    <div class="page-header flex-between fade-in">
      <div>
        <h1 class="page-title">Command Center</h1>
        <p class="page-subtitle">Real-time facility monitoring & gate control</p>
      </div>
      <div class="pulse-badge">
        <div class="pulse-dot"></div>
        System Live
      </div>
    </div>

    <!-- Stats -->
    <div class="stats-grid fade-in">
      <div class="stat-card blue">
        <div class="stat-label">Total Capacity</div>
        <div class="stat-value" id="statCapacity">1000</div>
        <div class="stat-detail">Total slots</div>
      </div>
      <div class="stat-card green">
        <div class="stat-label">Currently Inside</div>
        <div class="stat-value" id="statInside">0</div>
        <div class="stat-detail">Active vehicles</div>
      </div>
      <div class="stat-card purple">
        <div class="stat-label">Available</div>
        <div class="stat-value" id="statAvailable">1000</div>
        <div class="stat-detail">Free spots</div>
      </div>
    </div>

    <!-- Gate Control Hub -->
    <div class="glass-card mb-4 fade-in" id="gateHub"
      style="border-left: 4px solid var(--accent-blue); transition: all 0.3s ease;">
      <div class="card-header py-3 flex-between">
        <div class="d-flex align-items-center gap-3">
          <div id="gateIndicator" class="pulse-dot" style="background:var(--accent-blue); width:12px; height:12px;">
          </div>
          <div>
            <h2 class="card-title" id="gateStatusText" style="font-size:1rem;">System Ready — Monitoring Gate</h2>
            <p id="gateSubtext" style="font-size:0.75rem; color:var(--text-muted); margin:0;">Waiting for next vehicle
              scan...</p>
          </div>
        </div>
        <div style="display:flex; align-items:center; gap:1.5rem;">
          <div id="gateActionArea"></div>
          <div id="gateTimer" class="mono-bold" style="font-size:1.5rem; color:var(--accent-blue); display:none;">04s</div>
        </div>
      </div>
    </div>

    <div class="content-grid">
      <!-- Left: Scanning Activity & Camera -->
      <div class="glass-card fade-in" style="display:flex; flex-direction:column; gap:1.5rem;">
        <div>
          <div class="card-header mb-2">
            <h2 class="card-title">📷 Gate Scanner</h2>
          </div>

          <form id="uploadForm">
            <input type="hidden" name="parking_location" value="OPERA">
            <div style="display:flex; gap:1rem; margin-bottom:1rem;">
              <div class="w-full">
                <label style="font-size:0.8rem; color:var(--text-muted); margin-bottom:0.3rem; display:block;">Gate Mode</label>
                <select name="event_type" id="eventTypeSelect" class="form-control-glass">
                  <option value="entry">🟢 Entry Gate</option>
                  <option value="exit">🔴 Exit Gate</option>
                </select>
              </div>
              <div class="w-full">
                <label style="font-size:0.8rem; color:var(--text-muted); margin-bottom:0.3rem; display:block;">Upload Photo</label>
                <input type="file" name="image" accept="image/*" class="form-control-glass" id="fileInput">
              </div>
            </div>
          </form>

          <div id="scanFeedback" class="mt-3 p-2 text-center fade-in" style="display:none; background:rgba(255,255,255,0.05); border-radius:8px; border:1px solid rgba(255,255,255,0.1); min-height:40px;">
          </div>
        </div>

        <!-- Camera Controls -->
        <div class="camera-controls mt-2" style="display:flex; gap:0.5rem;">
          <button class="btn btn-outline btn-sm w-full" id="btnCamStart" onclick="startCamera()"><span>📹</span> Open Camera (Auto-Scan)</button>
          <button class="btn btn-danger btn-sm w-full" id="btnCamStop" onclick="stopCamera()" style="display:none;"><span>⏹</span> Stop Camera</button>
        </div>

        <div class="camera-feed mt-2" id="cameraFeed" style="display:none; position:relative; height: 350px; background:#000; border-radius:12px; overflow:hidden;">
          <video id="camVideo" autoplay playsinline muted style="width:100%; height:100%; object-fit: cover;"></video>
          <canvas id="camCanvas" style="display:none;"></canvas>
          <div style="position:absolute; top:10px; left:10px; background:rgba(239,68,68,0.8); color:white; padding:2px 8px; border-radius:4px; font-size:0.7rem; font-weight:bold; animation:pulse 1s infinite;">REC</div>
        </div>

        <!-- ESP32 Gate Connection -->
        <div class="mt-2" style="display:flex; gap:0.5rem; align-items:center;">
          <button class="btn btn-outline btn-sm" id="btnEspConnect" onclick="connectESP()" style="flex:1;">
            <span>🔌</span> Connect ESP32 (USB)
          </button>
          <button class="btn btn-danger btn-sm" id="btnEspDisconnect" onclick="disconnectESP()" style="flex:1; display:none;">
            <span>⛔</span> Disconnect ESP32
          </button>
          <div id="espStatus" style="font-size:0.7rem; color:var(--text-muted); padding:4px 8px; background:rgba(255,255,255,0.05); border-radius:6px; white-space:nowrap;">⚪ No ESP</div>
        </div>
      </div>

      <!-- Right: Active Garage List -->
      <div class="glass-card fade-in">
        <div class="card-header">
          <div class="d-flex align-items-center gap-2">
            <h2 class="card-title">🚗 Inside Garage</h2>
            <button onclick="localStorage.removeItem('recent_scans'); refreshDashboard();" class="btn-sm" style="background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.1); color:var(--text-muted); padding:2px 8px; border-radius:4px; font-size:0.65rem; cursor:pointer;">
              🧹 Clear Cache
            </button>
          </div>
          <span class="card-badge badge-ok">Real-time</span>
        </div>
        <div class="table-wrapper" style="max-height: 500px; overflow-y:auto;">
          <table>
            <thead>
              <tr>
                <th>OCR Plate</th>
                <th>Status</th>
                <th>Duration</th>
                <th>Est. Fee</th>
                <th style="text-align:right;">Action</th>
                <th style="text-align:center;">Payment</th>
              </tr>
            </thead>
            <tbody id="insideCarsBody">
              <tr><td colspan="6" class="text-center" style="padding:4rem;">Connecting to garage feed...</td></tr>
            </tbody>
          </table>
        </div>
      </div>
    </div>
  </main>
</div>

<script>
  let activeGateSession = null;
  let activeGatePlate = null;
  let activeGateMode = null;
  let activeTimer = null;
  let autoScanTimer = null;
  let isAutoScanning = false;
  let espPort = null;
  let espWriter = null;
  
  // Persistence: Remember exited cars even after refresh
  function getPersistentExits() {
    const data = JSON.parse(localStorage.getItem('exited_plates_log') || '{}');
    const now = Date.now();
    // Only keep exits from the last 30 minutes
    const filtered = {};
    for (const [p, time] of Object.entries(data)) {
        if (now - time < 1800000) filtered[p] = time;
    }
    return filtered;
  }
  
  function addPersistentExit(plate) {
    const data = getPersistentExits();
    data[normalizePlate(plate)] = Date.now();
    localStorage.setItem('exited_plates_log', JSON.stringify(data));
  }

  document.addEventListener('DOMContentLoaded', () => {
    refreshDashboard();
    setInterval(refreshDashboard, 2000); // 2 seconds for high-tier real-time feel
    
    const fileInput = document.getElementById('fileInput');
    if (fileInput) {
      fileInput.addEventListener('change', (e) => {
        if (e.target.files.length > 0) {
          const formData = new FormData(document.getElementById('uploadForm'));
          processScan(formData);
        }
      });
    }

    const uploadForm = document.getElementById('uploadForm');
    if (uploadForm) {
      uploadForm.addEventListener('submit', (e) => {
        e.preventDefault();
        const formData = new FormData(e.target);
        processScan(formData);
      });
    }

    // Smooth UI timer loop
    setInterval(() => {
      document.querySelectorAll('.live-timer').forEach(el => {
        const paidTime = new Date(el.getAttribute('data-paid')).getTime();
        const diffSec = Math.floor((5 * 60 * 1000 - (Date.now() - paidTime)) / 1000);
        if (diffSec > 0) {
          const m = Math.floor(diffSec / 60);
          const sec = diffSec % 60;
          el.innerHTML = `⏱️ ${m}:${sec.toString().padStart(2, '0')} TO EXIT`;
        } else {
          el.innerHTML = `OVERSTAYED`;
          el.style.color = '#ef4444';
        }
      });
    }, 1000);
  });

  async function refreshDashboard() {
    // Don't overwrite the table while the gate timer is actively counting down
    if (activeTimer) return;
    try {
      const [occR, insR] = await Promise.all([
        fetch('/security/api/occupancy'),
        fetch('/security/api/inside-cars')
      ]);
      // Re-check after await — timer may have started while we were fetching
      if (activeTimer) return;
      const occ = await occR.json();
      const ins = await insR.json();
      console.log('[DEBUG] inside-cars raw response:', JSON.stringify(ins).substring(0, 500));
      const g = occ.garage || occ;
      const capacity = g.capacity || g.total_capacity || 1000;
      const finalItems = renderGarageTable(ins);
      console.log('[DEBUG] renderGarageTable returned', finalItems.length, 'items');
      document.getElementById('statCapacity').textContent = capacity;
      document.getElementById('statInside').textContent = finalItems.length;
      document.getElementById('statAvailable').textContent = Math.max(0, capacity - finalItems.length);
    } catch (e) { console.error("Refresh error:", e); }
  }

  function normalizePlate(p) {
    if (!p) return '';
    const map = {'٠':'0','١':'1','٢':'2','٣':'3','٤':'4','٥':'5','٦':'6','٧':'7','٨':'8','٩':'9'};
    return String(p).replace(/[٠-٩]/g, d => map[d]).replace(/[\s\-\|]/g, '').trim();
  }

  function toArabicDigits(str) {
    if (!str) return '';
    const map = {'0':'٠','1':'١','2':'٢','3':'٣','4':'٤','5':'٥','6':'٦','7':'٧','8':'٨','9':'٩'};
    return String(str).replace(/[0-9]/g, d => map[d]);
  }

  function formatPlateVisual(str) {
    if (!str) return '';
    let s = toArabicDigits(str);
    // Split by common dividers
    let parts = s.split(/[\|]/).map(p => p.trim());
    if (parts.length >= 2) {
        // Space out characters in each part, filtering out Kashidas/Tatweel (ـ) that break visual spacing
        let letters = parts[0].split('').filter(c => c !== ' ' && c !== 'ـ').join(' ');
        let numbers = parts[1].split('').filter(c => c !== ' ' && c !== 'ـ').join(' ');
        return `${letters} | ${numbers}`;
    }
    // Fallback: space out everything, filtering out Kashidas
    return s.split('').filter(c => c !== ' ' && c !== 'ـ').join(' ').trim();
  }

  function formatDuration(mins) {
    if (mins == null) return '—';
    const h = Math.floor(mins / 60);
    const m = Math.floor(mins % 60);
    return h > 0 ? `${h}h ${m}m` : `${m}m`;
  }

  function renderGarageTable(items) {
    const body = document.getElementById('insideCarsBody');
    const data = Array.isArray(items) ? items : (items.data || items.items || []);
    const persistentExits = getPersistentExits();
    
    const mergedItems = data.filter(item => {
      const s = item.session || {};
      const v = item.vehicle || {};
      
      // Unified plate extraction logic
      let pRaw = v.plate_arabic || "";
      if (!pRaw && (v.plate_letters_ar || v.plate_numbers_ar)) {
          pRaw = (v.plate_letters_ar || '') + ' | ' + (v.plate_numbers_ar || '');
      }
      if (!pRaw) {
          // Check session, then item, then plate objects
          pRaw = s.plate_arabic || item.plate_arabic || 
                 s.plate_text_ar || item.plate_text_ar || 
                 s.plate_ar || item.plate_ar || 
                 s.plate_text || item.plate_text || 
                 s.plate_key || item.plate_key || 
                 (item.plate && typeof item.plate === 'object' ? (item.plate.arabic || item.plate.plate_ar) : item.plate) || 
                 '';
      }
      
      item._computed_plate = pRaw.replace(/car|vehicle|lp|en|ar/gi, '').trim();
      if (item._computed_plate === '|') item._computed_plate = s.plate_key || item.plate_key || '';
      
      const plateNorm = normalizePlate(item._computed_plate);
      return !persistentExits[plateNorm];
    });

    if (!mergedItems.length) {
      body.innerHTML = '<tr><td colspan="6" class="text-center" style="padding:3rem; color:var(--text-muted);">Garage is currently empty.</td></tr>';
      return [];
    }

    body.innerHTML = mergedItems.map(item => {
      const s = item.session || item || {};
      const v = item.vehicle || {};
      const p = item.pricing || {};
      
      let plate = formatPlateVisual(item._computed_plate) || '—';
      
      const isGuest = !v.id && !v.plate_letters_ar && !v.id_number; // Robust guest check
      const duration = formatDuration(p.duration_minutes);
      const fee = p.total_fee_egp != null ? p.total_fee_egp : '0.00';
      const sid = s.id || s.session_id || '';
      
      let actionHtml = '<td style="text-align:right; color:var(--text-muted); font-size:0.8rem;">Monitoring...</td>';
      
      const notes = (s.notes || '').toLowerCase();
      const hasCashIntent = notes.includes('intent_cash') || notes.includes('cash');
      const isPaid = s.payment_confirmed_at != null;
      
      let isCash = isGuest || hasCashIntent;
      let isPaidVisa = isPaid && !isCash;

      if ((isPaid || hasCashIntent) && !isCash) {
        actionHtml = `<td class="live-timer" data-paid="${s.payment_confirmed_at || new Date().toISOString()}" style="text-align:right; color:var(--accent-green); font-weight:bold; font-size:0.9rem;">Calculating...</td>`;
      } else if (isCash) {
        actionHtml = `<td style="text-align:right; color:var(--accent-green); font-weight:bold; font-size:0.9rem;">CASH READY</td>`;
      } else if (s.status === 'overstayed' || item.payment_status === 'paid_grace_period_expired') {
        actionHtml = `<td style="text-align:right; color:#ef4444; font-weight:bold; font-size:0.9rem;">OVERSTAYED</td>`;
      }

      let paymentHtml = '<td style="text-align:center; color:var(--text-muted); font-size:0.8rem;">—</td>';
      if (isCash) {
        paymentHtml = `<td style="text-align:center;"><span style="background:rgba(234, 179, 8, 0.2); color:#eab308; padding:2px 8px; border-radius:12px; font-size:0.75rem; font-weight:bold; border:1px solid rgba(234, 179, 8, 0.3);">💵 Cash</span></td>`;
      } else if (isPaidVisa) {
        paymentHtml = `<td style="text-align:center;"><span style="background:rgba(59, 130, 246, 0.2); color:#3b82f6; padding:2px 8px; border-radius:12px; font-size:0.75rem; font-weight:bold; border:1px solid rgba(59, 130, 246, 0.3);">💳 Visa</span></td>`;
      }

      return `
        <tr id="row-${sid}" class="session-row">
          <td class="mono-bold" style="font-size:1.1rem; color:white;">${plate.replace('car','').trim()}</td>
          <td><span class="status-pill ${isGuest ? 'guest' : 'reg'}">${isGuest ? 'UNREGISTERED' : 'REGISTERED'}</span></td>
          <td>${duration}</td>
          <td style="color:var(--accent-green); font-weight:bold;">${fee} EGP</td>
          ${actionHtml}
          ${paymentHtml}
        </tr>`;
    }).join('');
    return mergedItems;
  }

  async function processScan(formData) {
    const feedback = document.getElementById('scanFeedback');
    feedback.style.display = 'block';
    feedback.innerHTML = '<span class="spinner-border spinner-border-sm"></span> Processing...';
    // Reset file input so the same file can be selected again
    const fileInput = document.getElementById('fileInput');
    if (fileInput) fileInput.value = '';
    try {
      const resp = await fetch(window.location.href, {
        method: 'POST',
        headers: { 'X-Requested-With': 'XMLHttpRequest' },
        body: formData
      });
      const res = await resp.json();
      if (res.error) {
        feedback.innerHTML = `<span style="color:#ef4444;">❌ OCR Failed: ${res.error}</span>`;
        setTimeout(() => { feedback.style.display = 'none'; }, 3000);
      } else {
        feedback.innerHTML = `🎯 Detected: <span style="color:white;">${formatPlateVisual(res.plate_text_ar || res.plate)}</span> — <span style="color:var(--accent-green);">Done</span>`;
        handleGateScanResult(res, formData.get('event_type') || 'entry');
        setTimeout(() => { feedback.style.display = 'none'; }, 3000);
      }
    } catch (e) { 
      feedback.innerHTML = `<span style="color:#ef4444;">❌ Connection Error</span>`;
      setTimeout(() => { feedback.style.display = 'none'; }, 3000);
    }
  }

  function handleGateScanResult(res, mode) {
    const hub = document.getElementById('gateHub'), status = document.getElementById('gateStatusText'), subtext = document.getElementById('gateSubtext'), indicator = document.getElementById('gateIndicator');
    const rawPlate = res.plate_text_ar || res.plate || 'Unknown';
    const plate = formatPlateVisual(rawPlate);
    const norm = normalizePlate(rawPlate);
    const sid = res.session_id || res.session?.id || res.supabase?.session_id || res.session?.session_id || '';
    const isReg = res.app_registration?.is_registered || res.matched;
    
    activeGateSession = sid;
    activeGatePlate = norm;

    if (mode === 'entry') {
      // Clear ALL persistent exits — this car is re-entering, any stale cache must go
      localStorage.removeItem('exited_plates_log');
      activeGateMode = 'entry';

      hub.style.borderLeftColor = 'var(--accent-blue)'; indicator.style.background = 'var(--accent-blue)';
      status.innerHTML = `🟢 ENTRY — ${plate}`; subtext.innerText = isReg ? 'Member Entry' : 'Guest Entry';
      document.getElementById('gateActionArea').innerHTML = '';
      
      const body = document.getElementById('insideCarsBody');
      const row = `<tr>
          <td class="mono-bold" style="font-size:1.1rem; color:white;">${plate}</td>
          <td><span class="status-pill ${isReg ? 'reg' : 'guest'}">${isReg ? 'REGISTERED' : 'UNREGISTERED'}</span></td>
          <td>Just now</td>
          <td style="color:var(--accent-green); font-weight:bold;">0.00 EGP</td>
          <td style="text-align:right; color:var(--accent-blue); font-size:0.8rem; font-weight:bold;">SYNCING...</td>
        </tr>`;
      if (body.innerText.includes('empty')) body.innerHTML = '';
      body.insertAdjacentHTML('afterbegin', row);

      startHubTimer(10, plate, 'blue');
      sendToESP('1'); // Open the physical gate via USB
      fetch('/security/api/gate-open', {method: 'POST'}); // Open the physical gate via Cloud WiFi
    } else {
      const isAllowed = res.gate_decision?.allowed;
      const fee = res.pricing?.total_fee_egp || res.fee || '0.00';
      
      if (isAllowed) {
        // Auto-Exit for paid/subscription members
        confirmHubPayment(sid, plate); 
      } else {
        // Payment required for both unregistered and unpaid registered members
        hub.style.borderLeftColor = 'var(--accent-red)'; indicator.style.background = 'var(--accent-red)';
        status.innerHTML = `🔴 PAYMENT REQUIRED — ${plate}`; 
        subtext.innerText = isReg ? `Member Balance: ${fee} EGP` : `Guest Fee: ${fee} EGP`;
        
        const actionArea = document.getElementById('gateActionArea');
        actionArea.innerHTML = '';
        const btn = document.createElement('button');
        btn.className = 'btn-primary';
        btn.style = 'background:var(--accent-green); width:100%; padding:15px; font-weight:bold; border-radius:12px; margin-top:10px; cursor:pointer; font-size:1rem; box-shadow: 0 4px 15px rgba(0,255,100,0.3);';
        btn.innerHTML = '💳 CONFIRM CASH PAYMENT & EXIT';
        btn.onclick = () => confirmHubPayment(sid, plate);
        actionArea.appendChild(btn);
        
        refreshDashboard();
      }
    }
  }

  async function confirmHubPayment(sid, plate) {
    const hub = document.getElementById('gateHub'), indicator = document.getElementById('gateIndicator');
    const status = document.getElementById('gateStatusText');
    const norm = normalizePlate(plate);
    
    hub.style.borderLeftColor = 'var(--accent-green)'; indicator.style.background = 'var(--accent-green)';
    document.getElementById('gateActionArea').innerHTML = '';
    document.getElementById('gateSubtext').innerText = 'Exit Authorized — Drive Safe';
    activeGateMode = 'exit';
    
    addPersistentExit(plate);
    activeGateSession = sid;
    activeGatePlate = norm;
    
    // START TIMER IMMEDIATELY
    startHubTimer(10, plate, 'green');
    
    // Send gate open to ESP32 via USB serial
    sendToESP('1');
    // Send gate open to ESP32 via Cloud WiFi
    fetch('/security/api/gate-open', {method: 'POST'});

    try {
        const resp = await fetch('/security/api/cash-confirm', { 
            method: 'POST', 
            headers: { 'Content-Type': 'application/json' }, 
            body: JSON.stringify({ 
                session_id: sid,
                plate_arabic: plate,
                plate_key: activeGatePlate, // We use the normalized plate as key
                parking_location: document.getElementById('parking_location')?.value || 'OPERA'
            }) 
        });
        const d = await resp.json();
    } catch(e) { console.error("Database checkout failed", e); }
  }

  function startHubTimer(sec, plate, colorType = 'green') {
    const hubEl = document.getElementById('gateHub');
    const status = document.getElementById('gateStatusText');
    const indicator = document.getElementById('gateIndicator');
    const timerElem = document.getElementById('gateTimer'); 
    
    const color = colorType === 'blue' ? 'var(--accent-blue)' : 'var(--accent-green)';
    const bg = colorType === 'blue' ? 'rgba(59, 130, 246, 0.1)' : 'rgba(16, 185, 129, 0.1)';
    const shadow = colorType === 'blue' ? 'rgba(59, 130, 246, 0.4)' : 'rgba(16, 185, 129, 0.4)';

    if (activeTimer) clearInterval(activeTimer);
    
    hubEl.style.boxShadow = `0 0 30px ${shadow}`;
    hubEl.style.borderColor = color;
    
    timerElem.style.display = 'flex';
    timerElem.style.alignItems = 'center';
    timerElem.style.justifyContent = 'center';
    timerElem.style.position = 'absolute';
    timerElem.style.top = '1.5rem';
    timerElem.style.right = '1.5rem';
    timerElem.style.width = '60px';
    timerElem.style.height = '60px';
    timerElem.style.borderRadius = '50%';
    timerElem.style.background = bg;
    timerElem.style.border = `2px solid ${color}`;
    timerElem.style.boxShadow = `0 0 20px ${shadow}`;
    timerElem.style.color = color;
    timerElem.style.fontSize = '1.4rem';
    timerElem.style.fontWeight = '900';
    
    indicator.style.animation = 'pulse 1s infinite';
    indicator.style.boxShadow = `0 0 15px ${color}`;
    
    let left = sec;
    const update = () => {
        timerElem.innerText = left + 's';
        status.innerHTML = colorType === 'blue' ? `🟢 ENTRY — ${plate}` : `✅ OPEN — ${plate}`;
    };
    
    update();
    activeTimer = setInterval(() => {
      left--; 
      if (left <= 0) {
        clearInterval(activeTimer); activeTimer = null;
        resetHub();
      } else {
        update();
      }
    }, 1000);
  }

  function resetHub() {
    const hub = document.getElementById('gateHub');
    const status = document.getElementById('gateStatusText');
    const timerElem = document.getElementById('gateTimer');
    const indicator = document.getElementById('gateIndicator');
    const wasExit = activeGateMode === 'exit';
    
    timerElem.style.display = 'none';
    indicator.style.animation = 'none';
    indicator.style.boxShadow = 'none';
    hub.style.borderLeftColor = 'var(--accent-blue)';
    hub.style.borderColor = 'rgba(255,255,255,0.05)';
    hub.style.boxShadow = 'none';
    indicator.style.background = 'var(--accent-blue)';
    status.innerHTML = '🛡️ GATE SECURE — <span style="color:var(--text-muted);">SYSTEM READY</span>';
    document.getElementById('gateSubtext').innerText = 'Waiting for vehicle detection...';
    document.getElementById('gateActionArea').innerHTML = '';
    
    activeGateSession = null;
    activeGatePlate = null;
    activeGateMode = null;
    // Only rebuild table on exit (car leaving). On entry, keep the row and let auto-refresh sync it.
    if (wasExit) refreshDashboard();
  }

  function calcDuration(start) {
    const diff = Math.floor((Date.now() - new Date(start).getTime()) / 60000);
    return diff > 60 ? `${Math.floor(diff/60)}h ${diff%60}m` : `${diff}m`;
  }

  function captureFrameAuto() {
    if (isAutoScanning) return;
    const video = document.getElementById('camVideo'), canvas = document.getElementById('camCanvas');
    if (video.videoWidth === 0) return;
    isAutoScanning = true;
    canvas.width = video.videoWidth; canvas.height = video.videoHeight;
    canvas.getContext('2d').drawImage(video, 0, 0);
    const formData = new FormData();
    formData.append('camera_frame', canvas.toDataURL('image/jpeg', 0.9));
    formData.append('event_type', document.getElementById('eventTypeSelect').value);
    formData.append('parking_location', 'OPERA');
    processAutoScan(formData);
  }

  async function processAutoScan(formData) {
    try {
      const resp = await fetch(window.location.href, {
        method: 'POST',
        headers: { 'X-Requested-With': 'XMLHttpRequest' },
        body: formData
      });
      const res = await resp.json();
      
      if (res.error || res.reason === 'plate_not_detected') {
        return;
      }
      
      const plate = res.plate_text_ar || res.plate || 'Unknown';
      
      // Completely ignore empty, N/A, or Unknown plates
      if (!plate || plate.toUpperCase() === 'N/A' || plate.toUpperCase() === 'UNKNOWN') {
        return;
      }
      
      const norm = normalizePlate(plate);
      
      // Only trigger the gate workflow if it's a new car we haven't just processed
      if (norm !== activeGatePlate) {
        handleGateScanResult(res, formData.get('event_type') || 'entry');
      }
    } catch (e) { 
      // Silent fail on network error for auto-scan
    } finally {
      isAutoScanning = false;
    }
  }

  async function startCamera() {
    try {
      const stream = await navigator.mediaDevices.getUserMedia({ video: { facingMode: "environment" } });
      document.getElementById('cameraFeed').style.display = 'block';
      document.getElementById('camVideo').srcObject = stream;
      document.getElementById('btnCamStart').style.display = 'none';
      document.getElementById('btnCamStop').style.display = 'block';
      window.streamObj = stream;
      
      // Auto-scan every 2.5 seconds
      if (autoScanTimer) clearInterval(autoScanTimer);
      autoScanTimer = setInterval(captureFrameAuto, 2500);
    } catch (e) { alert("Camera access denied."); }
  }

  function stopCamera() {
    if (window.streamObj) window.streamObj.getTracks().forEach(t => t.stop());
    if (autoScanTimer) { clearInterval(autoScanTimer); autoScanTimer = null; }
    document.getElementById('cameraFeed').style.display = 'none';
    document.getElementById('btnCamStart').style.display = 'block';
    document.getElementById('btnCamStop').style.display = 'none';
  }

  // ── ESP32 Web Serial API ──────────────────────────────────
  async function connectESP() {
    if (!('serial' in navigator)) {
      alert('Web Serial API not supported in this browser. Use Chrome or Edge.');
      return;
    }
    try {
      espPort = await navigator.serial.requestPort();
      await espPort.open({ baudRate: 115200 });
      espWriter = espPort.writable.getWriter();
      
      document.getElementById('btnEspConnect').style.display = 'none';
      document.getElementById('btnEspDisconnect').style.display = 'block';
      document.getElementById('espStatus').innerHTML = '🟢 ESP32 Connected';
      document.getElementById('espStatus').style.color = 'var(--accent-green)';
      console.log('[ESP] Connected via USB Serial');
    } catch (e) {
      console.error('[ESP] Connection failed:', e);
      document.getElementById('espStatus').innerHTML = '🔴 Failed';
      document.getElementById('espStatus').style.color = '#ef4444';
    }
  }

  async function disconnectESP() {
    try {
      if (espWriter) { espWriter.releaseLock(); espWriter = null; }
      if (espPort) { await espPort.close(); espPort = null; }
    } catch (e) { console.error('[ESP] Disconnect error:', e); }
    
    document.getElementById('btnEspConnect').style.display = 'block';
    document.getElementById('btnEspDisconnect').style.display = 'none';
    document.getElementById('espStatus').innerHTML = '⚪ No ESP';
    document.getElementById('espStatus').style.color = 'var(--text-muted)';
    console.log('[ESP] Disconnected');
  }

  async function sendToESP(command) {
    if (!espWriter) return;
    try {
      const encoder = new TextEncoder();
      await espWriter.write(encoder.encode(command));
      console.log('[ESP] Sent command:', command);
      
      // Flash the status indicator
      const statusEl = document.getElementById('espStatus');
      statusEl.innerHTML = '⚡ GATE OPENING';
      statusEl.style.color = '#eab308';
      setTimeout(() => {
        statusEl.innerHTML = '🟢 ESP32 Connected';
        statusEl.style.color = 'var(--accent-green)';
      }, 2000);
    } catch (e) {
      console.error('[ESP] Send failed:', e);
      disconnectESP();
    }
  }

</script>
{% endblock %}