#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
@File    :   oracle_helper.py
@Time    :   2025/01/09 11:31:32
@Author  :   dulip3ng
@Version :   1.0
@Desc    :   None
'''
import os.path

import oracledb
from typing import List, Dict, Any, Optional


class OracleHelper:
    def __init__(self, username: str, password: str, dsn: str):
        """
        初始化数据库连接
        :param username: 数据库用户名
        :param password: 数据库密码
        :param dsn: 数据库连接字符串（格式：hostname:port/service_name）
        """
        current_dir = os.path.dirname(__file__)
        client_dir = os.path.join(current_dir, "instantclient_23_6")
        print(client_dir)
        oracledb.init_oracle_client(lib_dir= client_dir)
        self.username = username
        self.password = password
        self.dsn = dsn
        self.connection = None

    def connect(self):
        """连接到数据库"""
        try:
            self.connection = oracledb.connect(
                user=self.username,
                password=self.password,
                dsn=self.dsn
            )
        except oracledb.Error as e:
            print(f"数据库连接失败: {e}")

    def disconnect(self):
        """关闭数据库连接"""
        if self.connection:
            self.connection.close()

    def execute_query(self, sql: str, params: Optional[Dict] = None) -> List[Dict[str, Any]]:
        """
        执行查询语句
        :param sql: SQL 查询语句
        :param params: 查询参数（可选）
        :return: 查询结果列表，每行是一个字典
        """
        results = []
        try:
            cursor = self.connection.cursor()
            cursor.execute(sql, params or {})
            columns = [col[0] for col in cursor.description]  # 获取列名
            for row in cursor:
                results.append(dict(zip(columns, row)))  # 将每行数据转换为字典
            cursor.close()
        except oracledb.Error as e:
            print(f"查询执行失败: {e}")
        return results

    def execute_update(self, sql: str, params: Optional[Dict] = None) -> int:
        """
        执行更新语句（INSERT/UPDATE/DELETE）
        :param sql: SQL 更新语句
        :param params: 更新参数（可选）
        :return: 受影响的行数
        """
        try:
            cursor = self.connection.cursor()
            cursor.execute(sql, params or {})
            self.connection.commit()
            row_count = cursor.rowcount
            cursor.close()
            return row_count
        except oracledb.Error as e:
            self.connection.rollback()
            print(f"更新执行失败: {e}")
            return -1

    def execute_many(self, sql: str, data: List[Dict]) -> int:
        """
        批量执行更新语句
        :param sql: SQL 更新语句
        :param data: 批量数据（列表中的每个字典对应一行数据）
        :return: 受影响的总行数
        """
        try:
            cursor = self.connection.cursor()
            cursor.executemany(sql, data)
            self.connection.commit()
            row_count = cursor.rowcount
            cursor.close()
            return row_count
        except oracledb.Error as e:
            self.connection.rollback()
            print(f"批量更新执行失败: {e}")
            return 0

    def call_procedure(self, procedure_name: str, params: Optional[List] = None):
        """
        调用存储过程
        :param procedure_name: 存储过程名称
        :param params: 存储过程参数（可选）
        """
        try:
            cursor = self.connection.cursor()
            cursor.callproc(procedure_name, params or [])
            self.connection.commit()
            cursor.close()
        except oracledb.Error as e:
            self.connection.rollback()
            print(f"存储过程调用失败: {e}")