# ✅ SERVICE AREA RESTRICTION IMPLEMENTED!

## 🎯 **YOUR REQUEST:**
> "Keep postcode autocomplete when I write first two words. I am allowed to serve only Greater Manchester, Chester and Liverpool area, but I can collect or drop to all UK airport."

## ✅ **IMPLEMENTED!**

---

## 📍 **SERVICE AREA RULES:**

### **✅ WE SERVE (Addresses):**
1. **Greater Manchester**
   - M postcodes (M1-M99: Manchester city center and suburbs)
   - BL postcodes (Bolton)
   - OL postcodes (Oldham)
   - SK postcodes (Stockport)
   - WA postcodes (Warrington, Altrincham)
   - WN postcodes (Wigan)

2. **Chester**
   - CH postcodes (CH1-CH99: Chester and surrounding areas)

3. **Liverpool**
   - L postcodes (L1-L40: Liverpool and Merseyside)

### **✅ AIRPORTS (Nationwide):**
- **Can collect/drop at ANY UK airport** - NO restrictions!
- Examples: Manchester, Heathrow, Gatwick, Stansted, Birmingham, Edinburgh, Glasgow, etc.

---

## 🧪 **TEST SCENARIOS:**

### **Test 1: Manchester Airport → Manchester Address** ✅
1. Go to: https://3000-ibnwdfw71auepqpe8f3p3-b9b802c4.sandbox.novita.ai/booking.html
2. Journey Type: **Airport to Address**
3. Select Airport: **Manchester Airport (MAN)**
4. Dropoff Postcode: Type `M14`
5. See suggestions: `M14 4AA`, `M14 5PL`, etc. ✅
6. Select `M14 5PL`
7. Click "Get Instant Quote" → **WORKS!** ✅

---

### **Test 2: Manchester Address → Heathrow Airport** ✅
1. Journey Type: **Address to Airport**
2. Pickup Postcode: Type `M14`
3. Select `M14 5PL`
4. Select Airport: **London Heathrow (LHR)**
5. Click "Get Instant Quote" → **WORKS!** ✅

---

### **Test 3: Chester → Liverpool** ✅
1. Journey Type: **Address to Address**
2. Pickup Postcode: Type `CH1`
3. See suggestions: `CH1 1AB`, `CH1 2AA`, etc. ✅
4. Select `CH1 1AB`
5. Dropoff Postcode: Type `L1`
6. See suggestions: `L1 1AA`, `L1 2AB`, etc. ✅
7. Select `L1 1AA`
8. Click "Get Instant Quote" → **WORKS!** ✅

---

### **Test 4: Try Birmingham (NOT in service area)** ❌
1. Journey Type: **Address to Address**
2. Pickup Postcode: Type `B1` (Birmingham)
3. Wait for suggestions...
4. See message: **"Sorry, we only serve Greater Manchester, Chester, and Liverpool areas"** ❌
5. If you manually enter `B1 1AA` and try to get quote:
6. See error: **"Sorry, pickup address must be in Greater Manchester, Chester, or Liverpool area."** ❌

---

### **Test 5: London Address (NOT in service area)** ❌
1. Pickup Postcode: Type `SW1A` (Westminster, London)
2. See message: **"Sorry, we only serve Greater Manchester, Chester, and Liverpool areas"** ❌
3. Cannot proceed with quote ❌

---

## 🎨 **VISUAL EXAMPLE:**

```
┌────────────────────────────────────────────────────────┐
│  📍 Book Your Airport Transfer                         │
│  Get instant quote - Fixed prices, no hidden fees      │
│                                                         │
│  ╔═══════════════════════════════════════════════════╗ │
│  ║ 📍 Our Service Area:                              ║ │
│  ║ We serve addresses in:                            ║ │
│  ║ • Greater Manchester (M, BL, OL, SK, WA, WN)      ║ │
│  ║ • Chester (CH postcodes)                          ║ │
│  ║ • Liverpool (L postcodes)                         ║ │
│  ║                                                    ║ │
│  ║ ✈️ We can collect/drop at ANY UK Airport!        ║ │
│  ╚═══════════════════════════════════════════════════╝ │
│                                                         │
│  Journey Type: [Airport to Address ▼]                 │
│                                                         │
│  Select Pickup Airport * [Manchester Airport (MAN) ▼] │
│                                                         │
│  Dropoff Postcode * [M14____]                          │
│    → M14 4AA  ← Click!                                 │
│    → M14 5PL                                           │
│    → M14 6AB                                           │
│                                                         │
│  [ Get Instant Quote ]                                 │
└────────────────────────────────────────────────────────┘
```

---

## ✅ **WHAT POSTCODES ARE ACCEPTED:**

### **Greater Manchester:**
```
✅ M1-M99    (Manchester)
✅ BL1-BL9   (Bolton)
✅ OL1-OL16  (Oldham)
✅ SK1-SK23  (Stockport, Macclesfield)
✅ WA1-WA16  (Warrington, Altrincham)
✅ WN1-WN8   (Wigan, Leigh)
```

### **Chester:**
```
✅ CH1-CH99  (Chester, Ellesmere Port)
```

### **Liverpool:**
```
✅ L1-L40    (Liverpool, Merseyside)
```

### **❌ NOT Accepted:**
```
❌ B (Birmingham)
❌ S (Sheffield)
❌ LS (Leeds)
❌ SW, SE, E, W, N, NW (London)
❌ Any other UK postcode outside service area
```

---

## 🔄 **HOW IT WORKS:**

### **1. Postcode Autocomplete:**
- User types: `M14`
- System fetches from UK Postcode API
- **Filters results** to show ONLY service area postcodes
- Shows: `M14 4AA`, `M14 5PL`, etc.

### **2. Non-Service Area:**
- User types: `B1` (Birmingham)
- System fetches from API
- **Filters out Birmingham postcodes**
- Shows message: *"Sorry, we only serve Greater Manchester, Chester, and Liverpool areas"*

### **3. Quote Validation:**
- User clicks "Get Instant Quote"
- System checks if pickup/dropoff are in service area
- If outside area → Shows error
- If inside area or airport → Proceeds to show vehicles

### **4. Airport Exception:**
- ANY UK airport is allowed for pickup/dropoff
- Airports bypass service area restriction
- Example: Can go from Heathrow (London) to M14 (Manchester) ✅

---

## 📊 **VALIDATION LOGIC:**

```javascript
// Service area postcodes
const serviceAreaPrefixes = [
  'M', 'BL', 'OL', 'SK', 'WA', 'WN',  // Greater Manchester
  'CH',                                 // Chester
  'L'                                   // Liverpool
];

// Examples:
'M14 5PL'   → M  → ✅ ACCEPTED (Manchester)
'CH1 1AB'   → CH → ✅ ACCEPTED (Chester)
'L1 1AA'    → L  → ✅ ACCEPTED (Liverpool)
'B1 1AA'    → B  → ❌ REJECTED (Birmingham)
'SW1A 1AA'  → SW → ❌ REJECTED (London)
```

---

## ✅ **ALLOWED JOURNEYS:**

### **✅ Airport → Service Area:**
```
✅ Manchester Airport → M14 5PL
✅ Heathrow Airport → CH1 1AB
✅ Gatwick Airport → L1 1AA
✅ Edinburgh Airport → M14 5PL
```

### **✅ Service Area → Airport:**
```
✅ M14 5PL → Manchester Airport
✅ CH1 1AB → Heathrow Airport
✅ L1 1AA → Stansted Airport
✅ M14 5PL → Birmingham Airport
```

### **✅ Service Area → Service Area:**
```
✅ M14 5PL → CH1 1AB (Manchester → Chester)
✅ CH1 1AB → L1 1AA (Chester → Liverpool)
✅ L1 1AA → M14 5PL (Liverpool → Manchester)
✅ M14 5PL → M90 1QX (Manchester → Manchester Airport)
```

### **❌ NOT ALLOWED:**
```
❌ B1 1AA → M14 5PL (Birmingham → Manchester)
❌ M14 5PL → B1 1AA (Manchester → Birmingham)
❌ SW1A 1AA → L1 1AA (London → Liverpool)
❌ B1 1AA → B2 2BB (Birmingham → Birmingham)
```

---

## 🎉 **RESULT:**

✅ **Postcode autocomplete works** - Type 2 letters, get suggestions  
✅ **Service area restricted** - Only M, BL, OL, SK, WA, WN, CH, L postcodes  
✅ **Airports unrestricted** - Can collect/drop at ANY UK airport  
✅ **Clear error messages** - Users know if they're outside service area  
✅ **Visual notice** - Blue box shows service area at top of page  

---

## 🚀 **TEST NOW:**

**URL:** https://3000-ibnwdfw71auepqpe8f3p3-b9b802c4.sandbox.novita.ai/booking.html

**Try these tests:**
1. Type `M14` → See Manchester suggestions ✅
2. Type `CH1` → See Chester suggestions ✅
3. Type `L1` → See Liverpool suggestions ✅
4. Type `B1` → See error message ❌
5. Select Manchester Airport → M14 → Get quote ✅

**Everything works as requested!** 🎉
