import json
import datetime
import collections

with open("adoption.json") as filehandle:
    data=json.load(filehandle)

weeks=collections.defaultdict(list)
for day_data in data:
    year=day_data[0]
    month=day_data[1]+1
    day=day_data[2]
    ipv6_traffic=day_data[3]
    date=datetime.date(year, month, day)
    year=date.isocalendar()[0]
    week=date.isocalendar()[1]
    weeks[datetime.date.fromisocalendar(year, week, 1)].append(ipv6_traffic)

for week, values in weeks.items():
    high=sorted(values)[-1]
    low=sorted(values)[0]
    range=high-low
    print("{},{},{},{}".format(week, low, high, range))