#!/usr/bin/env python3

import json
import os
import re
import sys

json_file = sys.argv[1]
with open(json_file, 'r') as f:
    issues = json.load(f)

tickets = issues['tickets']

def get_ticket_num(ticket):
    return ticket['ticket_num']

def is_ticket(num):
    return 0 < num and num < 6000

tickets.sort(key=get_ticket_num)

issue1 = re.compile('[Ii]ssue #?(\d+)')
issue2 = re.compile('#(\d+)[ \.]')

for t in tickets:
    current = get_ticket_num(t)
    description = t['description']
    referenced = None

    m = issue1.search(description)
    if m:
        referenced = int(m.group(1))
        if not is_ticket(referenced):
            referenced = None

    if referenced is None:
        m = issue2.search(description)
        if m:
            referenced = int(m.group(1))
            if not is_ticket(referenced):
                referenced = None

    if referenced is not None:
        print('Issue #{current} references #{referenced}{error}'.format(
            current=current,
            referenced=referenced,
            error=' - ERROR' if referenced > current else ''
        ))