igny8/docs/CHANGELOG.md

# Tenancy Change Log - December 9, 2025

## Summary
This document tracks all changes made to the multi-tenancy system during the current staging session and the last 2 commits (4d13a570 and 72d0b6b0).

---

## 🔥 Critical Fixes - December 9, 2025

### Fixed
- User swapping/logout issue - Redis sessions, no-cache auth backend, session integrity checks
- useNavigate/useLocation HMR errors - Single Suspense boundary for Routes

### Added
- Custom `NoCacheModelBackend` authentication backend to prevent user object caching
- Session integrity validation in middleware (stores/verifies account_id and user_id per request)

### Changed
- Session storage from database to Redis cache (`SESSION_ENGINE = 'django.contrib.sessions.backends.cache'`)
- React Router Suspense from per-route to single top-level boundary

---

## 🔧 Recent Session Changes (Uncommitted)

### 1. Authentication & Signup Flow
**Fixed: JWT Token Generation in Registration**
- **Issue**: Users were immediately logged out after signup because tokens weren't being returned
- **Root Cause**: Two separate `register` endpoints existed - one in `AuthViewSet` (unused) and one in `RegisterView` (actual endpoint)
- **Fix**: Updated `RegisterView` in `backend/igny8_core/auth/urls.py` to generate and return JWT tokens
  ```python
  # Added token generation to RegisterView
  access_token = generate_access_token(user, account)
  refresh_token = generate_refresh_token(user, account)
  # Return tokens in response data
  ```
- **Files Changed**: `backend/igny8_core/auth/urls.py`
- **Impact**: Users now stay logged in after successful registration

**Enhanced: Frontend Token Extraction**
- **Issue**: Frontend couldn't parse tokens from backend response structure
- **Fix**: Added multiple fallback paths in `authStore.ts` to handle nested response structure
  ```typescript
  // Handle both data.tokens.access and data.data.tokens.access
  const newToken = tokens.access || responseData.access || data.data?.tokens?.access
  ```
- **Files Changed**: `frontend/src/store/authStore.ts`

### 2. Payment Confirmation Modal
**Fixed: Invoice Amount Display**
- **Issue**: Amount showing as "PKR 0.00" in payment confirmation modal
- **Root Cause**: Frontend expected `total` field but backend returned `total_amount`
- **Fix**: Updated invoice API to return both fields for compatibility
  ```python
  'total': str(invoice.total),  # Alias for compatibility
  'total_amount': str(invoice.total),
  ```
- **Files Changed**: 
  - `backend/igny8_core/business/billing/views.py`
  - `frontend/src/components/billing/PaymentConfirmationModal.tsx`
  - `frontend/src/components/billing/PendingPaymentBanner.tsx`

### 3. Payment Approval Workflow
**Fixed: Manual Status Change Not Triggering Account Activation**
- **Issue**: When admin changed payment status to "succeeded" in Django admin, it didn't activate account or add credits
- **Root Cause**: `save_model()` only set `approved_by` but didn't run the full approval workflow
- **Fix**: Enhanced `save_model()` in `PaymentAdmin` to trigger complete workflow:
  - Update invoice status to 'paid'
  - Activate subscription status to 'active'
  - Activate account status to 'active'
  - Add credits based on plan
  - Prevent duplicate credit transactions
- **Files Changed**: `backend/igny8_core/modules/billing/admin.py`
- **Impact**: Admins can now manually approve payments in Django admin with full automation

### 4. Site Creation Permissions
**Fixed: Site Creation Failing Due to Permission Issues**
- **Issue**: Users couldn't create sites and were getting logged out
- **Root Cause**: 
  1. `SiteViewSet.get_permissions()` wasn't properly returning instances
  2. Domain field validation rejected empty strings
- **Fixes Applied**:
  - Updated `get_permissions()` to return instantiated permission classes
    ```python
    return [IsAuthenticatedAndActive(), HasTenantAccess(), IsEditorOrAbove()]
    ```
  - Modified domain validation to accept empty/None values
    ```python
    if not value or value.strip() == '':
        return None
    ```
- **Files Changed**: 
  - `backend/igny8_core/auth/views.py`
  - `backend/igny8_core/auth/serializers.py`

---

## 📦 Commit: 4d13a570 - Payment Methods and Configurations

### Payment Method Configuration
**Added: Global Payment Method Configurations**
- Created migration `0009_add_missing_payment_methods.py` to add:
  - Bank Transfer (Manual) - Enabled for US, CA, GB, AU, PK, IN, EU
  - Mobile Wallet (Manual) - Enabled for PK, IN
  - Stripe (Disabled) - Configured for future use
  - PayPal (Disabled) - Configured for future use

**Added: Database Constraints and Indexes**
- Migration `0010_add_database_constraints.py`:
  - Added indexes on frequently queried fields
  - Improved query performance for payment and invoice lookups
  - Added constraints for data integrity

**Added: Webhook Configuration**
- Migration `0013_add_webhook_config.py`:
  - Added webhook fields to `PaymentMethodConfig`:
    - `webhook_url`
    - `webhook_secret`
    - `webhook_events` (JSON field)
  - Prepared for Stripe/PayPal webhook integration

### Currency Conversion System
**Added: Multi-Currency Support**
- Created `backend/igny8_core/business/billing/utils/currency.py`:
  - Currency multipliers for 8 countries (PKR, INR, GBP, CAD, AUD, EUR)
  - `convert_usd_to_local()` function
  - `format_currency()` function
  - `get_currency_for_country()` mapping

**Updated: Invoice Creation with Local Currency**
- Modified `InvoiceService.create_subscription_invoice()`:
  - Converts USD plan prices to local currency
  - Stores original USD price in metadata
  - Stores exchange rate for reference
- Modified `InvoiceService.create_credit_package_invoice()`:
  - Same currency conversion logic

### Frontend Payment Components
**Added: PaymentHistory Component**
- Location: `frontend/src/components/billing/PaymentHistory.tsx`
- Features:
  - Display user's payment history
  - Status indicators (pending, succeeded, failed)
  - Amount and currency display
  - Manual reference and notes

**Enhanced: SignUpFormUnified**
- Updated plan display with currency conversion
- Dynamic payment method selection based on country
- Billing information collection for paid plans
- Payment confirmation modal integration

**Enhanced: PaymentConfirmationModal**
- Fixed amount display with proper currency
- Support for file upload (proof of payment)
- Transaction reference input
- Admin notes field

### Payment Workflow Services
**Added: Email Notification Service**
- Location: `backend/igny8_core/business/billing/services/email_service.py`
- Features:
  - Payment confirmation emails
  - Invoice emails
  - Payment approval/rejection notifications

**Added: PDF Invoice Generation**
- Location: `backend/igny8_core/business/billing/services/pdf_service.py`
- Features:
  - Generate PDF invoices
  - Include company branding
  - Line items and totals
  - Payment instructions

**Added: Automated Tasks**
- `subscription_renewal.py`: Automatic subscription renewal
- `payment_retry.py`: Retry failed payments

### Testing
**Added: Comprehensive Test Suite**
- `test_payment_workflow.py`: End-to-end payment testing
- `test_payment_method_filtering.py`: Payment method availability tests
- `test_concurrency.py`: Concurrent payment handling tests

---

## 📦 Commit: 72d0b6b0 - Tenancy Fixes

### Subscription Model Improvements
**Added: Database Constraints**
- Migration `0012_fix_subscription_constraints.py`:
  - Ensured data integrity for subscription relationships
  - Added proper foreign key constraints

**Simplified: Payment Status Flow**
- Migration `0007_simplify_payment_statuses.py`:
  - Reduced payment statuses to core states
  - Improved status transition logic
  - Clearer admin workflow

### Model Enhancements
**Added: Invoice-Subscription Foreign Key**
- Migration `0008_add_invoice_subscription_fk.py`:
  - Direct relationship between invoices and subscriptions
  - Improved query performance
  - Better data consistency

**Added: Payment-CreditTransaction Link**
- Migration `0012_add_payment_fk_to_credit_transaction.py`:
  - Track which payment triggered credit addition
  - Audit trail for credit transactions
  - Prevent duplicate credit allocation

### Account Model Updates
**Enhanced: Billing Information Fields**
- Added comprehensive billing fields to Account model:
  - `billing_email`
  - `billing_address_line1`, `billing_address_line2`
  - `billing_city`, `billing_state`, `billing_postal_code`
  - `billing_country`
  - `tax_id`

### Frontend Auth Improvements
**Enhanced: ProtectedRoute Component**
- Added 100ms initialization delay
- Improved token verification
- Better loading state management
- Prevents premature redirects

**Enhanced: SignUpFormSimplified**
- Streamlined UI for signup
- Better error handling
- Improved validation messages

---

## 🗂️ Documentation Updates

### New Documentation
1. **PAYMENT-APPROVAL-FIXED.md**: Payment approval workflow guide
2. **ADMIN-PAYMENT-APPROVAL-GUIDE.md**: Step-by-step admin guide for approving payments
3. **SIGNUP-FIXES-DEC-9-2024.md**: Detailed signup flow fixes

### Updated Documentation Structure
```
multi-tenancy/
├── in-progress/
│   ├── ADMIN-PAYMENT-APPROVAL-GUIDE.md
│   ├── PAYMENT-WORKFLOW-QUICK-START.md
│   ├── SIGNUP-FIXES-DEC-9-2024.md
│   └── IMPLEMENTATION-STATUS.md
└── PAYMENT-APPROVAL-FIXED.md
```

---

## 📊 Impact Summary

### Backend Changes
- **Models**: 6 new migrations, enhanced Account/Invoice/Payment/Subscription models
- **Services**: 3 new services (email, PDF, currency conversion)
- **Admin**: Enhanced payment approval workflow
- **API**: Fixed registration endpoint, improved invoice serialization
- **Tasks**: 2 new Celery tasks for automation

### Frontend Changes
- **Components**: 3 new/enhanced components (PaymentHistory, SignUpFormUnified, PaymentConfirmationModal)
- **Store**: Enhanced authStore with better token handling
- **Routing**: Improved ProtectedRoute with initialization delay

### Database Schema
- **New Fields**: 15+ new fields across models
- **New Indexes**: 8+ indexes for performance
- **New Constraints**: 5+ constraints for data integrity
- **New Foreign Keys**: 2 new relationships

### Testing
- **New Tests**: 3 comprehensive test files
- **Coverage**: Payment workflow, concurrency, method filtering

---

## 🔍 Key Improvements

1. **Authentication Flow**: Seamless signup-to-login experience with proper JWT token handling
2. **Payment Processing**: Complete manual payment workflow with admin approval
3. **Multi-Currency**: Support for 8 currencies with automatic conversion
4. **Data Integrity**: Comprehensive constraints and foreign keys
5. **User Experience**: Better error handling, loading states, and feedback
6. **Admin Workflow**: One-click payment approval with automatic account activation
7. **Performance**: Added indexes on frequently queried fields
8. **Audit Trail**: Metadata tracking for all payment and credit transactions

---

## 🚀 Next Steps

### Immediate Priorities
1. Test complete signup → payment → activation flow
2. Verify currency conversion accuracy
3. Test site creation workflow
4. Validate webhook configurations

### Future Enhancements
1. Enable Stripe integration
2. Enable PayPal integration
3. Add automated payment retry logic
4. Implement subscription auto-renewal
5. Add invoice PDF email attachments
6. Create payment analytics dashboard

---

## 📝 Notes

### Breaking Changes
- None - all changes are backward compatible

### Deprecations
- Duplicate `AuthViewSet.register()` method (unused, kept for reference)

### Known Issues
- Workflow guide "dismissed" setting 404 error (non-critical, doesn't affect core functionality)

---

**Last Updated**: December 9, 2024
**Session Duration**: ~4 hours
**Files Modified**: 51 files
**Lines Added**: 5,496
**Lines Removed**: 181