#coding utf-8
import sys
from operator import itemgetter
import json

if __name__=="__main__":
    #1.load data
    nowdate=sys.argv[1]
    f1 = open("./data/user_item_share_"+nowdate)
    user_share_item_dict={}
    user_shareid_dict = {}
    while True:
        line = f1.readline()
        if not line:
            break
        items = line.strip().split("\t")
        if len(items)<4:
            continue
        #(user, share)
        uid = items[1]
        shareid = items[2]
        vid = items[3]
        k_info = uid+"\t"+vid
        user_share_item_dict[k_info] = shareid
        user_shareid_dict[shareid] = (uid,vid)
    f1.close()
    print(len(user_share_item_dict))
    f2 = open("./data/user_item_click_"+nowdate)
    #user_group_dict={}
    share_return_dict = {}
    #item_dict = {}
    while True:
        line = f2.readline()
        if not line:
            break
        items = line.strip().split("\t")
        if len(items)<3:
            continue
        #(user, share)
        uid = items[1]
        shareid = items[2]
        #vid = items[3]
        if shareid not in share_return_dict:
            share_return_dict[shareid] = 1
        else:
            share_return_dict[shareid] += 1
    f2.close()
    user_item_return = {}
    for  k, v in user_share_item_dict.items():
         if v in share_return_dict:
             if k not in user_item_return:
                 user_item_return[k] = share_return_dict[v]
             else:
                 user_item_return[k] += share_return_dict[v]
    f3 = open("./data/user_item_return_count_"+nowdate, 'w')
    for k, v in user_item_return.items():
        f3.write(k+"\t"+str(v)+"\n")
    f3.close()
    #((user,item), score)
    #print(user_item_dict)
    #2. (uid, [(vid, score)....])