# Subscription Module - Complete Implementation

## Overview
Complete subscription lifecycle management system that handles the entire customer journey from installation to recurring billing.

## Key Features Implemented

### 1. Automatic Subscription Creation
✅ **InstallationObserver** automatically creates subscriptions when installation status changes to 'completed'
- Prevents duplicate subscriptions
- Extracts service details from sales order
- Calculates billing dates (30 days from installation)
- Syncs with Odoo subscription module
- Stores locally for performance

### 2. Odoo Integration
✅ **Enhanced OdooService** with full subscription support:
- `getCustomerServices()` - Fetches from sale.subscription or sale.order
- `createSubscription()` - Creates subscription in Odoo after installation
- `getSubscriptionDetails()` - Gets detailed subscription info
- `renewSubscription()` - Handles renewal in Odoo
- `suspendSubscription()` - Pauses subscription
- `reactivateSubscription()` - Resumes subscription

### 3. Subscription Lifecycle Management
✅ **Complete CRUD operations**:
- View all subscriptions with status
- Renew subscriptions (early renewal allowed 30 days before)
- Suspend active subscriptions
- Reactivate suspended subscriptions
- Track billing cycles and payment dates

### 4. Prevent Duplicate Orders
✅ **Installation tracking**:
- Subscriptions linked to installations
- `can_reorder` flag prevents re-ordering installed services
- Shows installation status on subscription cards
- Prevents duplicate quotations for existing subscriptions

### 5. Expiry & Renewal Alerts
✅ **Smart alert system**:
- Critical alerts for overdue payments (past due date)
- Warning alerts for renewals due within 3 days
- Info alerts for suspended services
- Sorted by urgency (critical > warning > info)
- Actionable buttons for quick resolution

### 6. Dashboard Integration
✅ **Subscription metrics**:
- Total subscriptions count
- Active subscriptions
- Suspended subscriptions
- Total monthly cost
- Upcoming renewals (within 7 days)

## Database Structure

### odoo_services Table
```sql
- id (primary key)
- customer_id (foreign key)
- odoo_subscription_id (Odoo subscription ID)
- odoo_product_id (Odoo product ID)
- service_name (e.g., "50Mbps Fibre")
- service_type (fibre, starlink, vsat, wireless)
- status (active, suspended, cancelled, pending)
- monthly_price (decimal)
- speed_mbps (integer)
- installation_address (text)
- start_date (date)
- end_date (date, nullable)
- billing_cycle (monthly, quarterly, annually)
- last_bill_date (date)
- next_bill_date (date)
- odoo_data (json - stores full Odoo record)
- created_at, updated_at
```

## API Endpoints

### GET /api/subscriptions
Get all customer subscriptions
- Returns: subscriptions list + summary statistics
- Merges local DB and Odoo data
- Includes installation status
- Includes alerts and renewal info

### GET /api/subscriptions/alerts
Get subscription alerts
- Returns: sorted alerts by urgency
- Filters for actionable items

### GET /api/subscriptions/{id}
Get detailed subscription
- Returns: full subscription details
- Includes billing history
- Includes usage metrics
- Includes installation details

### POST /api/subscriptions/{id}/renew
Renew subscription
- Updates billing dates
- Syncs with Odoo
- Returns new billing date

### POST /api/subscriptions/{id}/suspend
Suspend subscription
- Updates status to suspended
- Syncs with Odoo
- Preserves billing history

### POST /api/subscriptions/{id}/reactivate
Reactivate subscription
- Updates status to active
- Syncs with Odoo
- Resumes billing cycle

## Complete Flow

### Installation → Subscription Flow
1. Customer orders a package
2. Sales order created
3. Installation scheduled
4. Installation completed (status = 'completed')
5. **InstallationObserver triggers**
6. Subscription automatically created:
   - Start date = installation date
   - Next bill date = installation date + 30 days
   - Status = active
   - Synced with Odoo
7. Customer sees subscription in portal
8. Alerts generated 3 days before renewal

### Renewal Flow
1. System generates alert 3 days before due date
2. Customer clicks "Renew" button
3. Backend renews in Odoo
4. Local subscription updated:
   - last_bill_date = current next_bill_date
   - next_bill_date = current + 1 month
5. Customer receives confirmation
6. Payment processed (if integrated)

### Suspension Flow
1. Customer clicks "Suspend"
2. Confirmation dialog
3. Backend updates Odoo (state = 'paused')
4. Local status = 'suspended'
5. Service suspended
6. Can reactivate anytime

## Preventing Duplicate Orders

### 1. Installation Check
```javascript
subscription['can_reorder'] = !subscription['installation']['is_installed']
```
- If installation exists and is completed, can_reorder = false
- Prevents customer from ordering same service again

### 2. Quotation Check
- Before creating quotation, check for existing active subscription
- If subscription exists, redirect to subscription page
- Show message: "You already have this service"

### 3. Order Check
- Before creating order, verify no active subscription exists
- Prevents duplicate billing

## Dashboard Metrics

### Subscription Summary Card
```javascript
{
  total_subscriptions: 5,
  active_subscriptions: 4,
  suspended_subscriptions: 1,
  total_monthly_cost: 250.00,
  upcoming_renewals: 2
}
```

### Display on Dashboard
- Show active subscriptions count
- Show total monthly cost
- Show upcoming renewals badge
- Link to subscriptions page

## Notifications Integration

### Alert Types
1. **Renewal Due** (3 days before)
   - Urgency: warning
   - Action: "Renew Now"

2. **Payment Overdue** (past due date)
   - Urgency: critical
   - Action: "Pay Now"

3. **Service Suspended**
   - Urgency: warning
   - Action: "Reactivate"

### Notification Display
- Header notification icon shows count
- Dropdown shows recent alerts
- Subscriptions page shows all alerts
- Dashboard shows critical alerts

## Frontend Components

### Subscriptions Page (`/subscriptions`)
- Summary dashboard with metrics
- Alert notifications section
- Subscription cards with:
  - Service details
  - Status badges
  - Installation status
  - Quick actions (renew, suspend, reactivate)
  - Pricing and billing info

### Subscription Card Features
- Service icon (fibre, starlink, wireless)
- Status indicator (active, suspended, cancelled)
- Installation badge
- Alert count badge
- Speed and start date
- Next billing date
- Quick action buttons

## Testing Checklist

- [ ] Complete installation creates subscription
- [ ] Subscription appears in portal
- [ ] Alerts generated 3 days before renewal
- [ ] Renewal updates billing dates
- [ ] Suspension changes status
- [ ] Reactivation restores service
- [ ] Dashboard shows correct metrics
- [ ] Can't reorder installed services
- [ ] Odoo sync works correctly
- [ ] Notifications display properly

## Future Enhancements
- Automated payment processing
- Usage tracking and analytics
- Plan upgrades/downgrades
- Add-on services
- Loyalty rewards
- Referral bonuses
- Multi-year subscriptions
- Proration for mid-cycle changes