""" Fetch issues that match given jql query """
__author__ = "Kristian Berg"
__copyright__ = "Copyright (c) 2018 Axis Communications AB"
__license__ = "MIT"

import urllib.request as url
import json
import os
import argparse

def fetch():
    """ Fetch issues that match given jql query """
    # Jira Query Language string which filters for resolved issues of type bug
    jql = 'project = JENKINS '\
        + 'AND issuetype = Bug '\
        + 'AND status in (Resolved, Closed) '\
        + 'AND resolution = Fixed '\
        + 'AND component = core '\
        + 'AND created <= "2018-02-20 10:34" '\
        + 'ORDER BY created DESC'
    jql = jql.replace(' ', '%20')

    start_at = 0

    # max_results parameter is capped at 1000, specifying a higher value will
    # still return only the first 1000 results
    max_results = 1000

    os.makedirs('issues/', exist_ok=True)
    request = 'https://issues.jenkins-ci.org/rest/api/2/search?'\
        + 'jql={}&start_at={}&max_results={}'

    # Do small request to establish value of 'total'
    with url.urlopen(request.format(jql, start_at, '1')) as conn:
        contents = json.loads(conn.read().decode('utf-8'))
        total = contents['total']

    # Fetch all matching issues and write to file(s)
    print('Total issue matches: ' + str(total))
    print('Progress: | = ' + str(max_results) + ' issues')
    while start_at < total:
        with url.urlopen(request.format(jql, start_at, max_results)) as conn:
            with open('issues/res' + str(start_at) + '.json', 'w') as f:
                f.write(conn.read().decode('utf-8'))
        print('|', end='', flush='True')
        start_at += max_results

    print('\nDone!')

if __name__ == '__main__':
    fetch()