"""
@author: luojunhui
"""
import aiomysql


class AsyncMySQLClient(object):
    """
    Async MySQL
    """

    def __init__(self, app):
        self.app = app

    async def init_pool(self):
        """
        初始化连接
        :return:
        """
        self.app.mysql_pool = await aiomysql.create_pool(
            host='rm-bp1159bu17li9hi94.mysql.rds.aliyuncs.com',
            port=3306,
            user='crawler',
            password='crawler123456@',
            db='piaoquan-crawler',
            charset='utf8mb4'
        )
        print("mysql init successfully")

    async def close_pool(self):
        """
        关闭 mysql 连接
        :return:
        """
        self.app.mysql_pool.close()
        await self.app.mysql_pool.wait_closed()

    async def async_select(self, sql):
        """
        select method
        :param sql:
        :return:
        """
        async with self.app.mysql_pool.acquire() as conn:
            async with conn.cursor() as cursor:
                await cursor.execute(sql)
                result = await cursor.fetchall()
                return result

    async def async_insert(self, sql):
        """
        insert and update method
        :param sql:
        :return:
        """
        async with self.app.mysql_pool.acquire() as coon:
            async with coon.cursor() as cursor:
                await cursor.execute(sql)
                await coon.commit()