#! -*- coding: utf8 -*-
import pandas as pd
from scipy.stats import ttest_ind
from scipy.stats import levene
import datetime
from utils import con_sql

#########推荐策略前后统计指标假设检验（t检验）###############

#自动获取昨日日期
def get_yesterday_date():
	#自动获取昨天的日期,如"2018-08-08"
	"""
	:rtype : str
	"""
	today = datetime.date.today()
	yesterday = today - datetime.timedelta(days=1)
	yesterday = yesterday.strftime("%Y-%m-%d")
	return yesterday
yesterday=get_yesterday_date()
print(yesterday)
#自动获取10日前的日期
def get_somedate():
	#自动获取10日前的日期,如"2018-07-28"
	"""
	:rtype : str
	"""
	today = datetime.date.today()
	someday = today - datetime.timedelta(days=10)
	someday = someday.strftime("%Y-%m-%d")
	return someday
ten_days=get_somedate()
print(ten_days)

#获取最近10天的数据
def DATA_recently(x,y,z,q,t):
    ten_days = get_somedate()
    sql_cid = "select {0}/{1} as {2} from {3} \
    where stat_date >='{4}' ".format(x,y,z,q,t)
    CVR_DATA_recently = con_sql(sql_cid)
    return CVR_DATA_recently
#
# #获取固定时间的10天的数据
def DATA_fixed(x,y,z,q):
    sql_cid = "select {0}/{1} as {2} from {3} \
    where stat_date >='2018-11-20'  and stat_date<='2018-11-29' group by stat_date".format(x,y,z,q)
    CVR_DATA_fixed = con_sql(sql_cid)
    return CVR_DATA_fixed
#
# #新用户cvr
x_crv_new_temp=DATA_recently("diary_meigou_newUser","diary_clk_newUser","CVR_new","diary_meigou_crv",ten_days)
x_crv_new=[x_crv_new_temp[i][0] for i in range(len(x_crv_new_temp))]
print(type(x_crv_new))
print(x_crv_new)
# y_crv_new_temp=DATA_fixed("diary_meigou_newUser","diary_clk_newUser","CVR_new","diary_meigou_crv")
# y_crv_new=[y_crv_new_temp[i][0] for i in range(len(y_crv_new_temp))]
# print(type(y_crv_new[0]))
# #老用户cvr
# x_crv_old=DATA_recently("diary_meigou_oldUser","diary_clk_oldUser","CVR_old","diary_meigou_crv")
# y_crv_old=DATA_fixed("diary_meigou_oldUser","diary_clk_oldUser","CVR_old","diary_meigou_crv")
#
# #新用户ct-cvr
# x_ctcrv_new=DATA_recently("diary_meigou_newUser","diary_exp_newUser","CT_CVR_new","diary_meigou_crv")
# y_ctcrv_new=DATA_fixed("diary_meigou_newUser","diary_exp_newUser","CT_CVR_new","diary_meigou_crv")
#
# #老用户ct-cvr
# x_ctcrv_old=DATA_recently("diary_meigou_oldUser","diary_exp_oldUser","CT_CVR_old","diary_meigou_crv")
# y_ctcrv_old=DATA_fixed("diary_meigou_oldUser","diary_exp_oldUser","CT_CVR_old","diary_meigou_crv")
#
# #新用户ctr(page_view)
# x_ctr_new=DATA_recently("clk_count_newUser_all","imp_count_newUser_all","ctr_new","bug_Recommendation_strategy_newUser")
# y_ctr_new=DATA_fixed("clk_count_newUser_all","imp_count_newUser_all","ctr_new","bug_Recommendation_strategy_newUser")
#
# #老用户ctr(page_view)
# x_ctr_old=DATA_recently("clk_count_oldUser_all","imp_count_oldUser_all","ctr_old","bug_Recommendation_strategy_temp")
# y_ctr_old=DATA_fixed("clk_count_oldUser_all","imp_count_oldUser_all","ctr_old","bug_Recommendation_strategy_temp")
#
# #新用户ctr(on_click_diary_card)
# x_ctr_new_o=DATA_recently("clk_count_newUser_all_a","imp_count_newUser_all","ctr_new","on_click_diary_card")
# y_ctr_new_o=DATA_fixed("clk_count_newUser_all_a","imp_count_newUser_all","ctr_new","on_click_diary_card")
#
# #老用户ctr(on_click_diary_card)
# x_ctr_old_o=DATA_recently("clk_count_oldUser_all_a","imp_count_oldUser_all","ctr_old","on_click_diary_card")
# y_ctr_old_o=DATA_fixed("clk_count_oldUser_all_a","imp_count_oldUser_all","ctr_old","on_click_diary_card")
#
#
#
#
def t_test(x,y): #进行t检验

    #策略前的数据，赋值给x,策略后的数据赋值给y,均采用10日内数据
    #检验数据方差是否齐性
    a=levene(x,y)
    p_value=a[1] #结果若p_value>0.05,则认为两组数据方差是相等的，否则两组数据方差是不等的

    if p_value>0.05: #认为数据方差具有齐性，equal_var=ture
        t_test=ttest_ind(x,y,equal_var=True)
        t_p_value=t_test[1]
        if t_p_value>0.05:
            print("策略前后两组数据无显著性差异，即该指标没有显著提升，p_value:%f" % t_p_value)
        else:
            print("策略前后两组数据有显著性差异，即该指标获得显著提升，p_value:%f" % t_p_value)
    else: #认为数据方差不具有齐性，equal_var=false
        t_test = ttest_ind(x, y, equal_var=False)
        t_p_value = t_test[1]
        if t_p_value > 0.05:
            print("策略前后两组数据无显著性差异，即该指标没有显著提升，p_value:%f" % t_p_value)
        else:
            print("策略前后两组数据有显著性差异，即该指标获得显著提升，p_value:%f" % t_p_value)
#
# ###假设检验，判断是否具有显著性
#
#新用户cvr假设检验
# crv_new_ttest=t_test(x_crv_new,y_crv_new)
#老用户cvr假设检验
# crv_old_ttest=t_test(x_crv_old,y_crv_old)
#
# #新用户ct_cvr假设检验
# ctcrv_new_ttest=t_test(x_ctcrv_new,y_ctcrv_new)
# #老用户ct_cvr假设检验
# ctcrv_old_ttest=t_test(x_ctcrv_old,y_ctcrv_old)
#
#
# #新用户ctr假设检验
# ctr_new_ttest=t_test(x_ctr_new,y_ctr_new)
# #老用户ctr假设检验
# ctr_old_ttest=t_test(x_ctr_old,y_ctr_old)
#
# ##新用户ctr(on_click_diary_card)假设检验
# ctr_new_o_ttest=t_test(x_ctr_new_o,y_ctr_new_o)
# #老用户ctr(on_click_diary_card)假设检验
# ctr_old_o_ttest=t_test(x_ctr_old_o,y_ctr_old_o)
#
#
# ###############推荐策略不变的情况下数据假设检验##############
#
# #1 计算每日指标卡方检验
#
# #自动获取5日前的日期
# def get_fivedate():
# 	#自动获取10日前的日期,如"2018-07-28"
# 	"""
# 	:rtype : str
# 	"""
# 	today = datetime.date.today()
# 	someday = today - datetime.timedelta(days=5)
# 	someday = someday.strftime("%Y-%m-%d")
# 	return someday
# five_days=get_fivedate()
#
# #获取最近5天的数据
# def chi_DATA_recently(x,y,z):
#     sql_cid = "select AVG({0}),AVG({1}) from {2} \
#     where stat_date >= five_days and stat_date<yesterday union all select {0},{1} from {2} where stat_date=yesterday}".format(x,y,z)
#     CVR_DATA_recently = con_sql(sql_cid)[0][0]
#     return CVR_DATA_recently


# chi_cvr_new=
# chi_cvr_old=
#
# chi_ctcvr_new=
# chi_ctcvr_old=
#
#
#
# def chi_cal(data):
