#!/usr/bin/env python3
"""
Fix BCE dates by using placeholder date '0001-01-01' for ancient events.

For archaeological sites with BCE founding dates, we use:
- event_date: '0001-01-01' (earliest representable date in ISO 8601)
- event_description: Contains the actual BCE date context
"""

import yaml
from pathlib import Path

# Paths
LIBYA_YAML = Path(__file__).parent.parent / "data/instances/libya/libyan_institutions.yaml"

def main():
    print("Fixing BCE date events with placeholder dates...\n")
    
    # Load YAML
    with open(LIBYA_YAML, 'r', encoding='utf-8') as f:
        data = yaml.safe_load(f)
    
    fixes = 0
    
    for inst in data:
        name = inst.get('name', '')
        
        if 'change_history' in inst and inst['change_history']:
            for event in inst['change_history']:
                # If event has no event_date (removed because it was BCE)
                if 'event_date' not in event:
                    # Add placeholder date for ancient events
                    event['event_date'] = '0001-01-01'
                    fixes += 1
                    print(f"✅ {name}: Added placeholder date for ancient event")
    
    # Save
    if fixes > 0:
        with open(LIBYA_YAML, 'w', encoding='utf-8') as f:
            yaml.dump(data, f, allow_unicode=True, sort_keys=False, default_flow_style=False)
        print(f"\n💾 Saved {fixes} fixes to {LIBYA_YAML}")
    else:
        print("No fixes needed!")

if __name__ == '__main__':
    main()