import pickle
import os

from odps import ODPS
from config import set_config

config_ = set_config()


def get_data_from_odps(date, project, table, connect_timeout=3000, read_timeout=500000,
                       pool_maxsize=1000, pool_connections=1000):
    """
    从odps获取数据
    :param date: 日期 type-string '%Y%m%d'
    :param project: type-string
    :param table: 表名 type-string
    :param connect_timeout: 连接超时设置
    :param read_timeout: 读取超时设置
    :param pool_maxsize:
    :param pool_connections:
    :return: records
    """
    odps = ODPS(
        access_id='LTAI4FtW5ZzxMvdw35aNkmcp',
        secret_access_key='0VKnydcaHK3ITjylbgUsLubX6rwiwc',
        project=project,
        endpoint='http://service.cn.maxcompute.aliyun.com/api',
        connect_timeout=connect_timeout,
        read_timeout=read_timeout,
        pool_maxsize=pool_maxsize,
        pool_connections=pool_connections
    )
    records = odps.read_table(name=table, partition='dt=%s' % date)
    return records


def write_to_pickle(data, filename, filepath=config_.DATA_DIR_PATH):
    """
    将数据写入pickle文件中
    :param data: 数据
    :param filename: 写入的文件名
    :param filepath: 文件存放路径，默认为config_.DATA_DIR_PATH
    :return: None
    """
    if not os.path.exists(filepath):
        os.makedirs(filepath)
    file = os.path.join(filepath, filename)
    with open(file, 'wb') as wf:
        pickle.dump(data, wf)


def read_from_pickle(filename, filepath=config_.DATA_DIR_PATH):
    """
    从pickle文件读取数据
    :param filename: 文件名
    :param filepath: 文件存放路径，默认为config_.DATA_DIR_PATH
    :return: data
    """
    file = os.path.join(filepath, filename)
    if not os.path.exists(file):
        return None
    with open(file, 'rb') as rf:
        data = pickle.load(rf)
    return data