# print weeknum, monday-sunday str
# like: 19w36(190902-190908)

import datetime
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('--scrapbox' ,action='store_true') #for scrapbox text
parser.add_argument('--name') #for scrapbox text
args = parser.parse_args()
# args.scrapbox

def yymmdd(dayobj):
    retstr = '%02d%02d%02d' % (dayobj.year % 100, dayobj.month, dayobj.day)
    return retstr
def yymmdd_wday(dayobj):
    list_wday = ['Mon','Tue','Wed','Thu','Fri','Sat','Sun']
    wday = list_wday[dayobj.weekday()]
    retstr = '%02d%02d%02d(%s)' % (dayobj.year % 100, dayobj.month, dayobj.day, wday)
    return retstr
def yy_wnum(dayobj):
    # dayobj.isocalendar(): returns iso-year, iso-wnum etc.
    # 'iso-year' 'iso-wnum' means
    #  which calendar year/week the day belongs to.
    (calyear,calweek) = dayobj.isocalendar()[0:2]
    retstr = '%02dw%02d' % (calyear % 100, calweek)
    return retstr

def weekstr(monday):
    # 190902-190908
    # iso weeknum counts Thursday
    sunday = monday + datetime.timedelta(days=6)
    retstr = '%s(%s-%s)' % (yy_wnum(monday), yymmdd(monday),yymmdd(sunday))
    if(args.name):
        retstr = args.name + '-' + retstr
    return retstr

def monday_thru_friday(monday):
    list_weekdays = [monday]
    list_outstr = []
    for i in range(1,5):# 1,2,3,4
        theday = monday + datetime.timedelta(days=i)
        list_weekdays.append(theday)
    for day in list_weekdays:
        list_outstr.append(yymmdd_wday(day))
    return list_outstr


today = datetime.date.today()

# isocalendar() works:
#  see 2018/12/31 is 2019-w1, not 2018-w52
#today = datetime.date(2018,12,31)

# need to determine 'Monday of the week'
# 0:Monday
# Monday = today - day_of_wk
day_of_wk = today.weekday()

# determine Monday and Sunday
monday = today - datetime.timedelta(days=day_of_wk)

out_title = weekstr(monday)
print(out_title)

if(args.scrapbox):
    # 来週・先週へのリンク
    last_monday = monday - datetime.timedelta(days=7)
    next_monday = monday + datetime.timedelta(days=7)
    # 7 days from this monday
    # link to next/last
    print ("last < ["+weekstr(last_monday) + "] ["+weekstr(next_monday) + "] > next")

    wdaylist = monday_thru_friday(monday)
    wdaylist.reverse()
    for wdaystr in wdaylist:
        print("[*** " + wdaystr + "]")
    if args.name:
        print("#" + args.name)