# -*- coding: utf-8 -*-

"""
检查car_owners表的约束条件
"""

import sqlite3
import logging

# 配置日志
handlers = [logging.FileHandler('constraints_check.log'), logging.StreamHandler()]
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s',
    handlers=handlers
)
logger = logging.getLogger(__name__)

# 数据库文件路径
db_path = 'car_info.db'

def check_car_owners_constraints():
    """
    检查car_owners表的约束条件
    """
    logger.info("开始检查car_owners表的约束条件")
    
    try:
        conn = sqlite3.connect(db_path)
        cursor = conn.cursor()
        
        # 检查表的唯一约束
        cursor.execute("PRAGMA index_list(car_owners)")
        indexes = cursor.fetchall()
        
        logger.info("car_owners表的索引列表:")
        for index in indexes:
            index_id, name, unique, origin, partial = index
            logger.info(f"索引ID: {index_id}, 名称: {name}, 唯一: {unique}, 来源: {origin}, 部分索引: {partial}")
            
            # 获取索引的列信息
            if name:
                cursor.execute(f"PRAGMA index_info({name})")
                index_columns = cursor.fetchall()
                logger.info(f"索引 {name} 的列信息:")
                for col in index_columns:
                    col_id, seq_no, col_name = col
                    logger.info(f"列ID: {col_id}, 序列号: {seq_no}, 列名: {col_name}")
        
        # 获取表的创建语句（如果可能）
        cursor.execute("SELECT sql FROM sqlite_master WHERE type='table' AND name='car_owners'")
        create_sql = cursor.fetchone()
        
        if create_sql:
            logger.info(f"car_owners表的创建语句: {create_sql[0]}")
        else:
            logger.warning("无法获取car_owners表的创建语句")
        
        # 关闭数据库连接
        conn.close()
        
    except sqlite3.Error as e:
        logger.error(f"数据库操作失败: {str(e)}")
    except Exception as e:
        logger.error(f"程序执行出错: {str(e)}")

def main():
    """
    主函数
    """
    logger.info("开始检查数据库约束")
    
    # 检查car_owners表的约束条件
    check_car_owners_constraints()
    
    logger.info("数据库约束检查完成")

if __name__ == "__main__":
    main()