import sqlite3

def audit_top_pure_sales():
    conn = sqlite3.connect('data/hiffi_catalog.db')
    cur = conn.cursor()
    
    cur.execute("""
        SELECT 
            a.artist_name, 
            cs.provenance_flag, 
            cs.audited_sales_units 
        FROM commercial_sales cs
        JOIN artists a ON cs.artist_id = a.artist_id
        ORDER BY cs.audited_sales_units DESC
        LIMIT 15
    """)
    
    records = cur.fetchall()
    
    print(f"{'Artist':<25} | {'Provenance':<15} | {'Pure Sales Units':<20}")
    print("-" * 65)
    
    for artist, prov, sales in records:
        # Using modern f-string formatting with commas
        sales_val = int(sales) if sales is not None else 0
        print(f"{str(artist)[:24]:<25} | {str(prov):<15} | {sales_val:20,d}")
        
    conn.close()

if __name__ == "__main__":
    audit_top_pure_sales()