# Implementation Summary: Nomenclature Sync (FAZA 3)

**Date**: 2025-12-13
**Status**: COMPLETED
**Developer**: Claude Code

---

## Overview

Successfully implemented FAZA 3: Nomenclature Sync for the data-entry-app. This feature enables the application to maintain a local SQLite cache of nomenclatures (suppliers, cash registers) from Oracle, reducing latency and improving performance.

## Files Created

### 1. Models
**File**: `/app/db/models/nomenclature.py`
- `SyncedSupplier` - Suppliers synced from Oracle NOM_PARTENERI
- `LocalSupplier` - Suppliers created locally from OCR (not yet in Oracle)
- `SyncedCashRegister` - Cash registers and bank accounts synced from Oracle

### 2. Service Layer
**File**: `/app/services/sync_service.py`
- `SyncService.sync_suppliers()` - Sync suppliers from Oracle to SQLite
- `SyncService.sync_cash_registers()` - Sync cash registers from Oracle to SQLite
- `SyncService.search_supplier()` - Search in synced + local suppliers
- `SyncService.create_local_supplier()` - Create local supplier from OCR data
- `SyncService.get_all_suppliers()` - Get all suppliers for dropdown
- `SyncService.get_all_cash_registers()` - Get all cash registers for dropdown
- `SyncService.get_schema_for_company()` - Map company ID to Oracle schema

**Company-to-Schema Mapping**:
```python
COMPANY_SCHEMAS = {
    1: "CONTAFIN",
    2: "CONTAFIN2",
}
```
> **TODO**: Move to config table or environment variable

### 3. API Router
**File**: `/app/routers/nomenclature.py`

New endpoints:
- `GET /api/nomenclature/suppliers` - Get all suppliers (synced + local)
- `GET /api/nomenclature/suppliers/search` - Search supplier by fiscal code or name
- `POST /api/nomenclature/suppliers/local` - Create local supplier from OCR
- `GET /api/nomenclature/cash-registers` - Get all cash registers
- `POST /api/nomenclature/sync/suppliers` - Manual supplier sync
- `POST /api/nomenclature/sync/cash-registers` - Manual cash register sync
- `POST /api/nomenclature/sync/all` - Sync all nomenclatures

### 4. Database Migration
**File**: `/migrations/versions/20251213_002805_add_nomenclature_tables.py`
- Creates `synced_suppliers` table with indexes
- Creates `local_suppliers` table with indexes
- Creates `synced_cash_registers` table with indexes

**Applied**: Yes (migration revision: 3a653da79002)

### 5. Documentation
**File**: `NOMENCLATURE_SYNC.md`
- Complete implementation guide
- Architecture overview
- API reference
- Usage examples
- Troubleshooting guide

**File**: `IMPLEMENTATION_SUMMARY_NOMENCLATURE_SYNC.md` (this file)
- Implementation summary
- Files changed
- Testing checklist

## Files Modified

### 1. `/app/db/models/__init__.py`
**Change**: Added imports for nomenclature models
```python
from .nomenclature import SyncedSupplier, LocalSupplier, SyncedCashRegister
```

### 2. `/app/services/nomenclature_service.py`
**Changes**:
- Updated `get_partners()` to accept optional `session` parameter
- Added SQLite fallback: returns synced/local suppliers if available
- Falls back to mock data if no synced data
- Updated `get_cash_registers()` to accept optional `session` parameter
- Added SQLite fallback for cash registers

### 3. `/app/routers/receipts.py`
**Changes**:
- Updated `get_partners()` endpoint to pass `session` to service
- Updated `get_cash_registers()` endpoint to pass `session` to service

### 4. `/app/routers/__init__.py`
**Change**: Added nomenclature router to exports
```python
from . import receipts, nomenclature
__all__ = ["receipts", "nomenclature"]
```

### 5. `/app/main.py`
**Change**: Registered nomenclature router
```python
from app.routers import receipts, ocr, nomenclature
app.include_router(nomenclature.router, prefix="/api/nomenclature", tags=["nomenclature"])
```

## Database Schema

### synced_suppliers
```sql
CREATE TABLE synced_suppliers (
    id INTEGER PRIMARY KEY,
    oracle_id INTEGER NOT NULL,
    company_id INTEGER NOT NULL,
    name VARCHAR(200) NOT NULL,
    fiscal_code VARCHAR(50),
    address VARCHAR(500),
    synced_at DATETIME NOT NULL
);
CREATE INDEX ix_synced_suppliers_oracle_id ON synced_suppliers(oracle_id);
CREATE INDEX ix_synced_suppliers_company_id ON synced_suppliers(company_id);
CREATE INDEX ix_synced_suppliers_fiscal_code ON synced_suppliers(fiscal_code);
```

### local_suppliers
```sql
CREATE TABLE local_suppliers (
    id INTEGER PRIMARY KEY,
    company_id INTEGER NOT NULL,
    name VARCHAR(200) NOT NULL,
    fiscal_code VARCHAR(50),
    address VARCHAR(500),
    created_by VARCHAR(100) NOT NULL,
    created_at DATETIME NOT NULL,
    pending_oracle_sync BOOLEAN NOT NULL
);
CREATE INDEX ix_local_suppliers_company_id ON local_suppliers(company_id);
CREATE INDEX ix_local_suppliers_fiscal_code ON local_suppliers(fiscal_code);
```

### synced_cash_registers
```sql
CREATE TABLE synced_cash_registers (
    id INTEGER PRIMARY KEY,
    oracle_id INTEGER NOT NULL,
    company_id INTEGER NOT NULL,
    name VARCHAR(100) NOT NULL,
    account_code VARCHAR(20) NOT NULL,
    register_type VARCHAR(10) NOT NULL,
    synced_at DATETIME NOT NULL
);
CREATE INDEX ix_synced_cash_registers_oracle_id ON synced_cash_registers(oracle_id);
CREATE INDEX ix_synced_cash_registers_company_id ON synced_cash_registers(company_id);
```

## API Endpoints Summary

### Nomenclature Endpoints

#### GET /api/nomenclature/suppliers
Get all suppliers (synced + local) for dropdown/autocomplete.

**Query Params**:
- `search` (optional) - Filter by name or fiscal code
- `company_id` (optional) - Company ID (defaults to user's first company)

**Response**:
```json
[
  {
    "id": 1,
    "oracle_id": 123,
    "name": "OMV Petrom",
    "fiscal_code": "RO123456",
    "source": "synced"
  },
  {
    "id": 2,
    "name": "Local Supplier SRL",
    "fiscal_code": "RO789012",
    "source": "local"
  }
]
```

#### GET /api/nomenclature/suppliers/search
Search for supplier by fiscal code or name.

**Query Params**:
- `fiscal_code` (optional) - Fiscal code to search
- `name` (optional) - Name to search (partial match)
- `company_id` (optional) - Company ID

**Response**:
```json
{
  "found": true,
  "supplier": {
    "id": 1,
    "oracle_id": 123,
    "name": "OMV Petrom",
    "fiscal_code": "RO123456",
    "address": "Str. Example 123"
  },
  "source": "synced"
}
```

#### POST /api/nomenclature/suppliers/local
Create a local supplier from OCR data.

**Body**:
```json
{
  "name": "New Supplier SRL",
  "fiscal_code": "RO12345678",
  "address": "Str. Example 123"
}
```

**Response**:
```json
{
  "id": 5,
  "name": "New Supplier SRL",
  "fiscal_code": "RO12345678",
  "address": "Str. Example 123",
  "is_local": true
}
```

#### GET /api/nomenclature/cash-registers
Get all cash registers for a company.

**Query Params**:
- `company_id` (optional) - Company ID

**Response**:
```json
[
  {
    "id": 1,
    "oracle_id": 10,
    "name": "Casa principala",
    "account_code": "5311",
    "register_type": "cash"
  },
  {
    "id": 2,
    "oracle_id": 20,
    "name": "Cont BCR",
    "account_code": "5121",
    "register_type": "bank"
  }
]
```

#### POST /api/nomenclature/sync/suppliers
Manually trigger supplier sync from Oracle.

**Response**:
```json
{
  "synced": 150,
  "errors": 0,
  "message": "Synced 150 suppliers with 0 errors"
}
```

#### POST /api/nomenclature/sync/cash-registers
Manually trigger cash register sync from Oracle.

**Response**:
```json
{
  "synced": 5,
  "errors": 0,
  "message": "Synced 5 cash registers with 0 errors"
}
```

#### POST /api/nomenclature/sync/all
Sync all nomenclatures (suppliers + cash registers).

**Response**:
```json
{
  "suppliers": {
    "synced": 150,
    "errors": 0
  },
  "cash_registers": {
    "synced": 5,
    "errors": 0
  },
  "total_synced": 155,
  "total_errors": 0,
  "message": "Synced 150 suppliers and 5 cash registers"
}
```

## Testing Checklist

### Unit Tests
- [ ] Test `SyncService.sync_suppliers()` with mock Oracle data
- [ ] Test `SyncService.sync_cash_registers()` with mock Oracle data
- [ ] Test `SyncService.search_supplier()` for synced suppliers
- [ ] Test `SyncService.search_supplier()` for local suppliers
- [ ] Test `SyncService.create_local_supplier()`
- [ ] Test upsert logic (update existing vs insert new)

### Integration Tests
- [ ] Test nomenclature router endpoints with authentication
- [ ] Test `/api/nomenclature/suppliers` endpoint
- [ ] Test `/api/nomenclature/suppliers/search` endpoint
- [ ] Test `/api/nomenclature/suppliers/local` endpoint
- [ ] Test `/api/nomenclature/cash-registers` endpoint
- [ ] Test `/api/nomenclature/sync/suppliers` endpoint
- [ ] Test `/api/nomenclature/sync/all` endpoint

### Manual Testing
- [ ] Start backend: `uvicorn app.main:app --reload --port 8003`
- [ ] Verify `/docs` shows new nomenclature endpoints
- [ ] Test sync endpoint (requires Oracle connection)
- [ ] Test search endpoint with various queries
- [ ] Test create local supplier endpoint
- [ ] Verify existing `/api/receipts/nomenclature/partners` still works
- [ ] Verify existing `/api/receipts/nomenclature/cash-registers` still works

### Oracle Connection Testing
- [ ] Verify SSH tunnel is running (dev/Linux)
- [ ] Test Oracle connection via health endpoint
- [ ] Verify company schema mapping is correct
- [ ] Test sync with real Oracle data
- [ ] Verify table names match actual Oracle schema

### Error Handling Testing
- [ ] Test sync with invalid company ID
- [ ] Test sync with Oracle connection error
- [ ] Test search with no results
- [ ] Test create local supplier with duplicate fiscal code
- [ ] Test endpoints with missing authentication token

## Dependencies

All required dependencies are already in `requirements.txt`:
- `oracledb>=2.0.1` - Oracle database connection
- `sqlmodel>=0.0.14` - ORM for SQLite
- `alembic>=1.13.1` - Database migrations

## Deployment Notes

### Development
1. Ensure SSH tunnel is running: `./ssh_tunnel.sh start`
2. Apply migration: `alembic upgrade head`
3. Run initial sync: `POST /api/nomenclature/sync/all`
4. Start backend: `uvicorn app.main:app --reload --port 8003`

### Production
1. Update `COMPANY_SCHEMAS` in `sync_service.py` with production mappings
2. Apply migration: `alembic upgrade head`
3. Set up cron job for periodic sync (daily recommended)
4. Configure Oracle connection (no SSH tunnel needed on Windows prod)

### Migration Commands
```bash
# Check current version
alembic current

# Apply migration
alembic upgrade head

# Rollback migration
alembic downgrade -1

# View migration history
alembic history
```

## Known Issues / TODOs

1. **Company Schema Mapping**: Currently hardcoded in `sync_service.py`
   - TODO: Move to config table or environment variable

2. **Oracle Table Names**: Assumes `NOM_PARTENERI` and `NOM_CASE` exist
   - TODO: Verify actual table names in production Oracle schema
   - TODO: Add error handling for missing tables

3. **Sync Scheduling**: No automatic periodic sync implemented
   - TODO: Add background task or cron job for daily sync

4. **Conflict Resolution**: No logic to handle local supplier matching synced supplier
   - TODO: Implement merge logic when OCR supplier matches Oracle supplier

5. **Bidirectional Sync**: Local suppliers not pushed to Oracle
   - TODO: Implement sync from SQLite to Oracle for approved local suppliers

6. **Performance**: Sync loads all records at once
   - TODO: Implement batch processing for large datasets
   - TODO: Add incremental sync (requires Oracle last_modified timestamp)

7. **Validation**: No validation for duplicate fiscal codes
   - TODO: Add uniqueness constraint and conflict resolution

8. **Testing**: No unit tests written yet
   - TODO: Add comprehensive test suite

## Success Criteria

✅ **Completed**:
- SQLite tables created for synced nomenclatures
- Sync service implemented with Oracle integration
- API endpoints for sync and query operations
- Updated existing nomenclature service to use synced data
- Database migration created and applied
- All files have correct Python syntax
- Documentation created

⏳ **Pending**:
- Unit tests
- Integration tests
- Manual testing with real Oracle data
- Production deployment
- Scheduled sync setup

## Next Steps

1. **Testing Phase**:
   - Write unit tests for sync service
   - Write integration tests for API endpoints
   - Manual testing with real Oracle connection
   - Performance testing with large datasets

2. **Production Readiness**:
   - Update company schema mappings for production
   - Verify Oracle table names
   - Set up cron job for periodic sync
   - Add monitoring and alerting

3. **Enhancements**:
   - Implement scheduled background sync
   - Add sync status dashboard in frontend
   - Implement conflict resolution
   - Add bidirectional sync (SQLite → Oracle)

## Related Documentation

- Complete Guide: `NOMENCLATURE_SYNC.md`
- Architecture: `docs/data-entry/ARCHITECTURE.md`
- API Docs: Available at `/docs` when app is running

---

**Implementation completed successfully!** All core features are in place and ready for testing.