# Database Migration Complete

**Date**: 2025-10-12
**Status**: ✅ Complete

## What Changed

### Before
- **CSV**: [extracted_property_urls.csv](extracted_property_urls.csv) - Raw scrape data
- **JSON**: [enriched_data.json](enriched_data.json) - Enriched data (no sync with CSV)
- **Problem**: No single source of truth, manual synchronization required

### After
- **SQLite Database**: [farmmatch.db](farmmatch.db) - Single source of truth (192 KB)
- **JSON Export**: [enriched_data.json](enriched_data.json) - Exported for backward compatibility
- **Database Manager**: [db_manager.py](db_manager.py) - Unified access layer

## New Architecture

```
farmmatch.db (SQLite)
    ├── properties          (167 rows) - Main data
    ├── criteria_scores     (0 rows)   - Detailed criteria breakdown
    ├── geocoding_history   (150 rows) - Audit trail
    ├── analysis_history    (325 rows) - Audit trail
    └── system_metadata     (3 rows)   - System state
```

## How To Use

### Query Properties
```python
from db_manager import DatabaseManager

db = DatabaseManager()

# Get all active properties
properties = db.get_all_properties()

# Get properties missing coordinates
missing = db.get_missing_geocoded_properties()

# Get statistics
stats = db.get_statistics()
```

### Update Geocoding
```python
db.update_geocoding(
    url='https://www.properstar.nl/listing/12345',
    lat=40.416775,
    lon=-3.703790,
    confidence='high',
    source='nominatim'
)
```

### Export to JSON (for map viewer)
```bash
python3 export_to_json.py
```

## Migration Stats

- **Total Properties**: 167
- **Successfully Migrated**: 167 (100%)
- **Geocoded**: 150 (89.8%)
- **Missing Coordinates**: 17
- **Database Size**: 192 KB

## Benefits

1. **Single Source of Truth**: All scripts read/write to one database
2. **Data Integrity**: CHECK constraints prevent invalid data
3. **Audit Trail**: History tables track all changes
4. **Performance**: Indexed queries, faster than JSON parsing
5. **Backward Compatible**: JSON export for existing map viewer

## Next Steps

All existing scripts should be updated to use [db_manager.py](db_manager.py) instead of directly reading/writing JSON:

- [ ] Update [geocode_with_breadcrumbs.py](geocode_with_breadcrumbs.py)
- [ ] Update [bulletproof_geocoding.py](bulletproof_geocoding.py)
- [ ] Update [add_location_names.py](add_location_names.py)
- [ ] Update [analyze_from_urls.py](analyze_from_urls.py)
- [ ] Update [custom_criteria.py](custom_criteria.py)
- [ ] Update [criteria_api.py](criteria_api.py)

## Files Created

1. [database_schema.py](database_schema.py) - Database schema definition
2. [migrate_to_sqlite.py](migrate_to_sqlite.py) - Migration script (one-time use)
3. [db_manager.py](db_manager.py) - Database access layer (use this!)
4. [export_to_json.py](export_to_json.py) - Export for backward compatibility
5. [farmmatch.db](farmmatch.db) - The database itself

## Testing

```bash
# Test database manager
python3 db_manager.py

# Export to JSON
python3 export_to_json.py

# Verify JSON matches database
python3 -c "
import json
from db_manager import DatabaseManager

# From database
db = DatabaseManager()
db_count = db.get_statistics()['total_properties']

# From JSON
with open('enriched_data.json') as f:
    json_count = len(json.load(f))

print(f'Database: {db_count}, JSON: {json_count}, Match: {db_count == json_count}')
"
```

---

**Database is now the source of truth. All data modifications should go through [db_manager.py](db_manager.py).**