# 📊 Statistics Cards Update

**Tanggal:** 20/01/2026  
**Status:** ✅ IMPLEMENTED  
**Author:** Rodhi

## 📝 Request

User meminta untuk menambahkan info cards di atas vehicle cards dengan statistik:

> "tambahkan info diatasnya berupa row col-lg-3- berapa total mesin yang mati- berapa total mesin yang nyala- berapa total kendaraan- berapa total yang kecepatan overspeed 50 km/jam"

## ✅ Implementation

### 4 Statistics Cards Ditambahkan:

1. **🚗 Total Kendaraan** (Primary/Blue)
   - Icon: `directions_car`
   - Calculation: `vehicles.value.length`

2. **🟢 Mesin Hidup** (Positive/Green)
   - Icon: `power`
   - Calculation: `StatusMesin === 'Hidup'`

3. **🔴 Mesin Mati** (Negative/Red)
   - Icon: `power_off`
   - Calculation: `StatusMesin === 'Mati'`

4. **⚠️ Overspeed >50 km/h** (Warning/Orange)
   - Icon: `speed`
   - Calculation: `Kecepatan > 50`

## 🔧 Technical Implementation

### Template Structure:
```vue
<!-- Statistics Cards -->
<div v-if="!loading && !error" class="row q-gutter-md q-mb-xl">
  <!-- Total Kendaraan -->
  <div class="col-12 col-sm-6 col-lg-3">
    <q-card class="shadow-1 stats-card">
      <q-card-section class="text-center">
        <q-icon name="directions_car" color="primary" size="32px" class="q-mb-sm" />
        <div class="text-h4 text-weight-bold text-primary">{{ totalVehicles }}</div>
        <div class="text-body2 text-grey-7">Total Kendaraan</div>
      </q-card-section>
    </q-card>
  </div>
  <!-- ... 3 other cards ... -->
</div>
```

### Computed Properties:
```javascript
// Total kendaraan
const totalVehicles = computed(() => {
  return vehicles.value.length
})

// Mesin hidup
const engineOnCount = computed(() => {
  return vehicles.value.filter(vehicle => vehicle.StatusMesin === 'Hidup').length
})

// Mesin mati
const engineOffCount = computed(() => {
  return vehicles.value.filter(vehicle => vehicle.StatusMesin === 'Mati').length
})

// Overspeed >50 km/h
const overspeedCount = computed(() => {
  return vehicles.value.filter(vehicle => {
    const speed = parseFloat(vehicle.Kecepatan) || 0
    return speed > 50
  }).length
})
```

## 🎨 Responsive Design

### Grid Layout:
- **Desktop (≥1024px):** 4 cards in one row (`col-lg-3`)
- **Tablet (768-1023px):** 2 cards per row (`col-sm-6`)
- **Mobile (<768px):** 1 card per row (`col-12`)

### Visual Design:
- **Spacing:** `q-gutter-md` between cards
- **Margin:** `q-mb-xl` below statistics section
- **Style:** `shadow-1 stats-card` with hover effects
- **Content:** Centered with icon, number, and label

## 📊 Color Scheme

| Card | Color | Hex | Usage |
|------|-------|-----|-------|
| Total Kendaraan | Primary | #1976d2 | General information |
| Mesin Hidup | Positive | #4caf50 | Good status (engines on) |
| Mesin Mati | Negative | #f44336 | Alert status (engines off) |
| Overspeed | Warning | #ff9800 | Warning status (speed violation) |

## 🧪 Example Calculation

**Sample Data (10 vehicles):**
- 3 vehicles: StatusMesin = 'Hidup', Kecepatan ≤ 50
- 2 vehicles: StatusMesin = 'Hidup', Kecepatan > 50 (overspeed)
- 5 vehicles: StatusMesin = 'Mati', Kecepatan = 0

**Expected Results:**
- 🚗 **Total Kendaraan:** 10
- 🟢 **Mesin Hidup:** 5 (3 + 2)
- 🔴 **Mesin Mati:** 5
- ⚠️ **Overspeed >50 km/h:** 2

## ⚡ Performance Features

- **Computed Properties:** Cached and auto-update when data changes
- **Efficient Filtering:** Array filter operations for statistics
- **Type Safety:** `parseFloat()` with fallback for speed calculations
- **Conditional Rendering:** Only show when data is loaded (`v-if="!loading && !error"`)

## 🚀 Testing

1. **Login:** http://localhost:5173/login (dayansgi/dayansgi123)
2. **Navigate:** http://localhost:5173/asset
3. **Verify:** 
   - 4 cards appear above vehicle cards
   - Numbers match actual vehicle data
   - Responsive layout works on different screen sizes
   - Real-time updates when data changes

## ✅ Status

**IMPLEMENTED - READY FOR TESTING**

4 statistics cards berhasil ditambahkan di atas vehicle cards dengan:
- ✅ Responsive grid layout (col-12 col-sm-6 col-lg-3)
- ✅ Real-time calculations using computed properties
- ✅ Color-coded design for easy identification
- ✅ Hover effects and professional styling
- ✅ Accurate data counting and filtering