#coding utf-8
import sys
import json

if __name__=="__main__":
    f = open(sys.argv[1])
    user_dict = {}
    while True:
        line = f.readline()
        if not line:
           break
        items = line.split("\t")
        if len(items)<3:
            continue
        uid = items[1]
        vid = items[2]
        vid_set = set('')
        if uid in user_dict:
            vid_set = user_dict[uid]
        vid_set.add(vid)
        user_dict[uid] = vid_set
    f.close()
    f1 = open(sys.argv[2])
    f2 = open(sys.argv[3], 'w')
    while True:
        line = f1.readline()
        if not line:
            break
        items = line.split("\t")
        if len(items)<2:
            continue
        vid = items[0]
        uid_list = json.loads(items[1])
        if len(uid_list)<5: # 小于5个mid的视频过滤掉
            continue
        item_dict = {}
        for uid in uid_list:
            if uid in user_dict:
                item_list = user_dict[uid] # 这个人曝光的视频
                for item in item_list:
                    item = item.strip()
                    if item in item_dict:
                         item_dict[item] = item_dict[item]+1
                    else:
                         item_dict[item]  = 1
        item_list= sorted(item_dict.items(), key=lambda s:s[1], reverse=True)
        f2.write(vid+"\t"+json.dumps(item_list[:100])+"\t"+items[1]+"\n")
    f1.close()
    f2.close()