# ✅ Holiday Calendar & Admin Configuration - Setup Complete!

## 🎉 Successfully Implemented

### **Database Tables Created:**
1. ✅ `holidays` - Organization holiday calendar
2. ✅ `admin_configurations` - System-wide admin settings

### **API Endpoints Created:**
- ✅ `/api/admin/holidays` - CRUD operations for holidays
- ✅ `/api/admin/configurations` - Manage admin settings

### **Features Implemented:**
- ✅ Holiday management (add/edit/delete/bulk import)
- ✅ TAT calculation excludes holidays for STANDARD priority
- ✅ Automatic holiday cache with 6-hour refresh
- ✅ Admin configuration system ready for future UI
- ✅ Sample Indian holidays data (2025) prepared for import

---

## 🚀 Quick Start

### **1. Verify Tables:**
```bash
# Check if tables were created
psql -d your_database -c "\dt holidays"
psql -d your_database -c "\dt admin_configurations"
```

### **2. Start the Backend:**
```bash
npm run dev
```

**You should see:**
```
📅 Holiday calendar loaded for TAT calculations
[TAT Utils] Loaded 0 holidays into cache
```

### **3. Add Your First Holiday (via API):**

**As Admin user:**
```bash
curl -X POST http://localhost:5000/api/admin/holidays \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_ADMIN_TOKEN" \
  -d '{
    "holidayDate": "2025-11-05",
    "holidayName": "Diwali",
    "description": "Festival of Lights",
    "holidayType": "NATIONAL"
  }'
```

### **4. Bulk Import Indian Holidays (Optional):**
```bash
curl -X POST http://localhost:5000/api/admin/holidays/bulk-import \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_ADMIN_TOKEN" \
  -d @data/indian_holidays_2025.json
```

---

## 📊 How It Works

### **TAT Calculation with Holidays:**

**STANDARD Priority:**
- ❌ Skips **weekends** (Saturday/Sunday)
- ❌ Skips **holidays** (from holidays table)
- ✅ Only counts **working hours** (9 AM - 6 PM)

**EXPRESS Priority:**
- ✅ Includes **all days** (24/7)
- ✅ No holidays or weekends excluded

---

## 📚 Documentation

- **Full Guide:** `docs/HOLIDAY_CALENDAR_SYSTEM.md`
- **Complete Summary:** `HOLIDAY_AND_ADMIN_CONFIG_COMPLETE.md`

---

## 🎯 Next Steps

### **For Backend Developers:**
1. Test holiday API endpoints
2. Verify TAT calculations with holidays
3. Add more admin configurations as needed

### **For Frontend Developers:**
1. Build Admin Holiday Management UI
2. Create Holiday Calendar view
3. Implement Configuration Settings page

---

## 🔍 Verify Setup

### **Check Holidays Table:**
```sql
SELECT * FROM holidays;
-- Should return 0 rows (no holidays added yet)
```

### **Check Admin Configurations:**
```sql
SELECT * FROM admin_configurations;
-- Should return 0 rows (will be seeded on first use)
```

### **Test Holiday API:**
```bash
# Get all holidays for 2025
curl http://localhost:5000/api/admin/holidays?year=2025 \
  -H "Authorization: Bearer YOUR_ADMIN_TOKEN"
```

---

## 📋 Sample Holidays Data

**File:** `data/indian_holidays_2025.json`

Contains 14 Indian national holidays for 2025:
- Republic Day (Jan 26)
- Holi
- Independence Day (Aug 15)
- Gandhi Jayanti (Oct 2)
- Diwali
- Christmas
- And more...

---

## ✅ Setup Status

| Component | Status | Notes |
|-----------|--------|-------|
| **Holidays Table** | ✅ Created | With 4 indexes |
| **Admin Config Table** | ✅ Created | With 3 indexes |
| **Holiday Model** | ✅ Implemented | Full CRUD support |
| **Holiday Service** | ✅ Implemented | Including bulk import |
| **Admin Controller** | ✅ Implemented | All endpoints ready |
| **Admin Routes** | ✅ Implemented | Secured with admin middleware |
| **TAT Integration** | ✅ Implemented | Holidays excluded for STANDARD |
| **Holiday Cache** | ✅ Implemented | 6-hour expiry, auto-refresh |
| **Sample Data** | ✅ Created | 14 holidays for 2025 |
| **Documentation** | ✅ Complete | Full guide available |

---

## 🎓 Example Usage

### **Create Request with Holiday in TAT Period:**

```javascript
// Create STANDARD priority request
POST /api/workflows
{
  "title": "Test Request",
  "priority": "STANDARD",
  "approvers": [
    { "email": "approver@example.com", "tatHours": 48 }
  ]
}

// If holidays exist between now and +48 hours:
// - Due date will be calculated skipping those holidays
// - TAT calculation will be accurate
```

---

## 🛠️ Troubleshooting

### **Holidays not excluded from TAT?**

1. Check if holidays cache is loaded:
   - Look for "Loaded X holidays into cache" in server logs
2. Verify priority is STANDARD (EXPRESS doesn't use holidays)
3. Check if holiday exists and is active:
   ```sql
   SELECT * FROM holidays WHERE holiday_date = '2025-11-05' AND is_active = true;
   ```

### **Cache not updating after adding holiday?**

- Cache refreshes automatically when admin adds/updates/deletes holidays
- If not working, restart backend server
- Cache also refreshes every 6 hours automatically

---

## 📞 Support

For issues or questions:
1. Check documentation in `docs/` folder
2. Review complete guide in `HOLIDAY_AND_ADMIN_CONFIG_COMPLETE.md`
3. Consult with backend team

---

**🎉 You're all set! Start adding holidays and enjoy accurate TAT calculations!**

---

**Last Updated:** November 4, 2025  
**Version:** 1.0.0  
**Team:** Royal Enfield Workflow System