# Payment Workflow - Quick Reference Card
**Backend:** ✅ Complete | **Frontend:** ⏳ Pending | **Date:** Dec 8, 2025

---

## 📊 System Status
- **Plans:** 5 configured (free, starter, growth, scale, internal)
- **Payment Methods:** 14 enabled (global + country-specific)
- **Accounts:** 15 total (11 trial, 4 active)
- **Data Integrity:** 100% (all checks passing)
- **API Endpoints:** 4 operational
- **Test Suite:** 3/3 passing

---

## 🔑 Key Workflows

### Free Trial Signup
```
User registers → Account(status=trial, credits=1000) → No invoice/subscription
```

### Paid Signup
```
User registers with plan → Account(status=pending_payment, credits=0)
→ Subscription(pending_payment) → Invoice(pending) → User pays externally
→ User submits confirmation → Payment(pending_approval)
→ Admin approves → Account(active) + Subscription(active) + Credits(1000)
```

### Payment Rejection
```
Admin rejects → Payment(failed) → Invoice(pending) → User can retry
```

---

## 🌐 API Endpoints

```bash
# 1. Get Payment Methods
GET /api/v1/billing/admin/payment-methods/?country=PK
→ Returns: [{id, payment_method, display_name, instructions, ...}]

# 2. Confirm Payment (User)
POST /api/v1/billing/admin/payments/confirm/
{
  "invoice_id": 1,
  "payment_method": "bank_transfer",
  "amount": "89.00",
  "manual_reference": "BT-2025-001",
  "manual_notes": "Optional description"
}
→ Creates: Payment(pending_approval)

# 3. Approve Payment (Admin)
POST /api/v1/billing/admin/payments/5/approve/
{"admin_notes": "Verified in bank statement"}
→ Updates: Account→active, Subscription→active, Invoice→paid, Credits+1000

# 4. Reject Payment (Admin)
POST /api/v1/billing/admin/payments/5/reject/
{"admin_notes": "Reference not found"}
→ Updates: Payment→failed, Invoice→pending (can retry)
```

---

## 🧪 Testing

```bash
# Run automated test suite
docker compose -f docker-compose.app.yml exec igny8_backend \
  python test_payment_workflow.py

# Test payment methods API
curl "http://localhost:8011/api/v1/billing/admin/payment-methods/?country=PK" | jq

# Database verification
docker compose -f docker-compose.app.yml exec igny8_backend \
  python manage.py shell < verification_script.py
```

---

## 📁 Files Reference

**Documentation:**
- `IMPLEMENTATION-STATUS.md` - Current status summary
- `IMPLEMENTATION-SUMMARY-PHASE2-3.md` - Detailed implementation log (19KB)
- `PAYMENT-WORKFLOW-QUICK-START.md` - API examples & troubleshooting (12KB)

**Code:**
- `backend/test_payment_workflow.py` - Automated E2E tests (17KB)
- `backend/api_integration_example.py` - Python API client (13KB)

**Models:**
- `backend/igny8_core/auth/models.py` - Account, Subscription, Plan, Site
- `backend/igny8_core/business/billing/models.py` - Invoice, Payment, PaymentMethodConfig

**APIs:**
- `backend/igny8_core/business/billing/views.py` - Payment endpoints
- `backend/igny8_core/auth/serializers.py` - Registration with billing

---

## ✅ Completed Tasks (19)

**Phase 1: Critical Fixes (6)**
- Fixed Subscription import, added plan FK, Site.industry required
- Updated free plan credits, auto-create SiteUserAccess, fixed Invoice admin

**Phase 2: Model Cleanup (6)**
- Removed duplicate fields (Invoice, Payment, Subscription)
- Added properties for backward compatibility, applied migration

**Phase 3: Backend (7)**
- Created PaymentMethodConfig data (14 records)
- Built 4 API endpoints, enhanced RegisterSerializer, PaymentAdmin
- Added billing snapshots to invoices, fixed InvoiceService bug

---

## ⏳ Pending Tasks (7)

**Frontend Components (4)**
1. Billing form step in signup
2. Payment method selector component
3. Payment confirmation modal
4. Pending payment dashboard banner

**Testing (2)**
5. Free trial E2E automation
6. Paid signup E2E automation

**Optional (1)**
7. Email notifications (submitted, approved, rejected)

---

## 🎯 Next Actions

**For Frontend Team:**
1. Review `PAYMENT-WORKFLOW-QUICK-START.md`
2. Check `api_integration_example.py` for API usage
3. Implement 4 frontend components
4. Test with backend APIs (localhost:8011)

**For Backend Team:**
- Backend complete, ready for frontend integration
- Monitor payment approvals via Django admin
- Add email notifications (optional enhancement)

**For Testing Team:**
- Run `test_payment_workflow.py` for regression testing
- Verify frontend integration once components ready
- Create E2E automated tests for UI flows

---

## 🔧 Quick Commands

```bash
# Start backend
docker compose -f docker-compose.app.yml up -d igny8_backend

# Restart after code changes
docker compose -f docker-compose.app.yml restart igny8_backend

# Run tests
docker compose -f docker-compose.app.yml exec igny8_backend python test_payment_workflow.py

# Access Django admin
http://localhost:8011/admin/billing/payment/

# Check logs
docker compose -f docker-compose.app.yml logs -f igny8_backend

# Database shell
docker compose -f docker-compose.app.yml exec igny8_backend python manage.py shell
```

---

## 📞 Support

**Issues:** Check `IMPLEMENTATION-STATUS.md` for known issues (currently: 0)  
**Questions:** Review `PAYMENT-WORKFLOW-QUICK-START.md` troubleshooting section  
**API Docs:** See API examples in documentation files

---

**Status:** Backend production-ready. Frontend implementation in progress.