#!/usr/bin/env python3
import json
from os import environ
import sys
import os
# krebs polling
import poll

f = 'suggestions.json'
db = poll.load_db(f)
votes = []
try:
    votes = sys.argv[1:]
except:
    print("""usage: undo number (...)
    undos vote of one or more entries based on .list""")
    sys.exit(1)
voter = environ['_prefix'].split("@")[1]
voter_name = environ['_from']
for vote in votes:
    try:
        vote = int(vote)
        if not voter in db[vote]['votes']:
            print("%s, you never voted for '%s'!"%(voter_name,db[vote]['title']))
        else:
            del(db[vote]['votes'][voter] )
            print("%s undid vote for '%s'" %(voter_name,db[vote]['title'] ))
    except:
        print("%s undo voting for #%d failed" %(voter_name,vote))

poll.save_db(f,db)