import pandas as pd
import datetime
import process_feature

from datetime import datetime as dt
from config import set_config
from utils import get_data_from_odps, write_to_pickle
from log import Log

config_ = set_config()
log_ = Log()


def get_rov_feature_table(date, project, table):
    """
    从DataWorks表中获取对应的特征值
    :param date: 日期 type-string '%Y%m%d'
    :param project: type-string
    :param table: 表名 type-string
    :return: feature_array type-DataFrame
    """
    records = get_data_from_odps(date=date, project=project, table=table)
    feature_value_list = []
    for record in records:
        feature_value = {}
        for feature_name in process_feature.features:
            if feature_name == 'dt':
                feature_value[feature_name] = date
            else:
                feature_value[feature_name] = record[feature_name]
        feature_value_list.append(feature_value)
    feature_array = pd.DataFrame(feature_value_list)
    log_.info('feature table finished... date={}, shape={}'.format(date, feature_array.shape))
    return feature_array


def get_data_with_date(date, delta_days, project, table):
    """
    获取某一时间范围的特征数据
    :param date: 标准日期，delta基准，type-string，'%Y%m%d'
    :param delta_days: 日期范围（天），type-int，「 >0: date前，<0: date后 」
    :param project: type-string
    :param table: DataWorks表名，type-string
    :return: data，type-DataFrame
    """
    base_date = dt.strptime(date, '%Y%m%d')
    data_list = []
    for days in range(0, delta_days):
        delta = datetime.timedelta(days=days)
        delta_date = base_date - delta
        # 获取特征数据
        delta_data = get_rov_feature_table(date=delta_date.strftime('%Y%m%d'), project=project, table=table)
        data_list.append(delta_data)
    data = pd.concat(data_list)
    # 重新进行索引
    data.reset_index(inplace=True)
    # 删除index列
    data = data.drop(columns=['index'])
    return data


def get_train_predict_data():
    """
    获取训练和预测数据
    :return: None
    """
    now_date = datetime.datetime.today()
    log_.info('now date: {}'.format(now_date))
    # ###### 训练数据 - 从7天前获取前30天的数据，写入pickle文件
    log_.info('===== train data')
    train_dt = now_date - datetime.timedelta(days=config_.TRAIN_DIFF)
    train_date = dt.strftime(train_dt, '%Y%m%d')
    train_data = get_data_with_date(
        date=train_date,
        delta_days=config_.TRAIN_DELTA_DAYS,
        project=config_.TRAIN_PROJECT,
        table=config_.TRAIN_TABLE
    )
    write_to_pickle(data=train_data, filename=config_.TRAIN_DATA_FILENAME)
    log_.info('train data finished, shape={}'.format(train_data.shape))

    # ###### 预测数据 - 从1天前获取前1天的数据，写入pickle文件
    log_.info('===== predict data')
    predict_dt = now_date - datetime.timedelta(days=config_.PREDICT_DIFF)
    predict_date = dt.strftime(predict_dt, '%Y%m%d')
    predict_data = get_data_with_date(
        date=predict_date,
        delta_days=config_.PREDICT_DELTA_DAYS,
        project=config_.PREDICT_PROJECT,
        table=config_.PREDICT_TABLE
    )
    write_to_pickle(data=predict_data, filename=config_.PREDICT_DATA_FILENAME)
    log_.info('predict data finished, shape={}'.format(predict_data.shape))


if __name__ == '__main__':
    get_train_predict_data()