import psycopg2
import json

try:
    conn = psycopg2.connect(
        host='localhost',
        port=5432,
        database='inventory_system',
        user='test',
        password='1234'
    )
    cur = conn.cursor()
    cur.execute('SELECT id, action, target_name, details FROM audit_logs ORDER BY id DESC LIMIT 3')
    rows = cur.fetchall()
    print('=== 最新3条审计日志 ===')
    for row in rows:
        print(f'ID: {row[0]}')
        print(f'Action: {row[1]}')
        print(f'Target: {row[2]}')
        details = row[3]
        if details:
            # 格式化显示
            if isinstance(details, str):
                try:
                    details = json.loads(details)
                except:
                    pass
            print(f'Details: {json.dumps(details, indent=2, ensure_ascii=False)}')
        else:
            print(f'Details: None')
        print('---')
    cur.close()
    conn.close()
except Exception as e:
    print(f'Error: {e}')