import pymssql

MSSQL_AUTH = {'host': '127.0.0.1', 'user': 'sa', 'password': 'sa.123', 'database': 'DevDatabase'}

MYSQL_AUTH = {'host': '127.0.0.1', 'user': 'root', 'password': 'Root.123', 'db': 'DevDatabase'}


class MSSQL:
    def __init__(self, auth: dict = None, charset="utf8", as_dict=True):
        auth = auth if auth else MSSQL_AUTH
        self.conn = pymssql.connect(**auth, charset=charset, as_dict=as_dict)
        self.cur = self.conn.cursor()  # 创建游标
        """ MySQL替换两行代码
            self.conn = pymysql.connect(**auth, charset=charset)
            self.cur = self.conn.cursor(cursor=pymysql.cursors.DictCursor)
        """

    def exec_insert(self, table, data: dict):
        """
        :param table: TabelName
        :param data: {'FieldName':'Value',}
        :return: lastrowid
        """
        sql = "INSERT INTO {} ({}) VALUES ({})"
        key_list, val_list = [], []
        for k, v in data.items():
            key_list.append(k)
            val_list.append(v)
        # SQLite数据库这里的's%'要换成'?'
        sql = sql.format(table, ','.join(key_list), ','.join(['%s'] * len(val_list)))
        self.cur.execute(sql, tuple(val_list))
        self.conn.commit()  # 提交
        return self.cur.lastrowid

    def execute(self, sql, commit=False):
        """
        :param sql: 执行查询或更新语句
        :param commit: 是否提交,执行更新语句时=True
        :return: 查询结果集/None
        """
        self.cur.execute(sql)
        if commit:
            self.conn.commit()
        else:
            return self.cur.fetchall()

    def get_value(self, table, eq=0, **kwargs):
        """
        :param table: 表名
        :param eq: 数据下标索引,负数不使用索引
        :param kwargs: 依据,条件
        :return: 结果
        """
        condition = 'and'.join([f"{k}='{v}'" for k, v in kwargs.items()])
        self.cur.execute(f"SELECT * FROM {table} WHERE {condition}")
        if eq >= 0:
            return self.cur.fetchall()[eq]  # 需要的话,可以添加安全判断,防止下标越界
        return self.cur.fetchall()

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.cur.close()  # 关闭游标
        self.conn.close()  # 关闭链接


if __name__ == '__main__':
    with MSSQL() as db:
        res = db.execute("SELECT TOP(100) * FROM TelRecord")
        print(res)