"""Find outdated tasks"""

from __future__ import print_function

import errno
import json
import logging
import os
import sys

from port_stats import lists
from port_stats import rpm_ffi
from port_stats import tasks
from port_stats import utils


LOG = logging.getLogger(__name__)


def subtask_srpm_nevr(task, subtask_id):
    try:
        nevr_file = os.path.join(task['task_path'], 'gears',
                                 str(subtask_id), 'nevr')
        with open(nevr_file, 'r') as f:
            data = f.read()
        name, evr = data.strip().split('\t')
        return name, evr
    except OSError as e:
        if e.errno == errno.ENOENT:
            return None, None
    except Exception as e:
        pass
    LOG.info('Failed to parse subtask NEVR for %s %s', task, subtask_id)
    return None, None


def is_outdated(task, package_evrs):
    if '/archive/' in task['task_path']:
        return False
    for subid, subtask in task['subtasks'].iteritems():
        if list(subtask.keys()) == ['userid']:
            continue
        if 'srpm' not in subtask:
            return False
        name, evr = subtask_srpm_nevr(task, subid)
        if name is None or evr is None:
            return False
        existing_nevr = package_evrs.get(name)
        if existing_nevr is None:
            return False
        task_evr = rpm_ffi.parse_evr(evr)
        if rpm_ffi.evr_cmp(task_evr, existing_nevr.evr, 'pkg') > 0:
            return False
    return True


def main(config_path, repo, owner='all'):
    logging.basicConfig(
        format='%(asctime)s %(levelname)-5s %(name)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S',
        stream=sys.stderr, level=logging.INFO)

    with open(config_path) as f:
        config = json.load(f)

    repo_cfg = config['repos'][repo]
    nevrs = lists.read_srclists(repo_cfg['path'], repo_cfg['arch'])
    existing = dict((p.name, p) for p in nevrs)

    task_list = tasks.load_tasks(config['tasks'], repo)

    outdated = (task for task in task_list
                if task['repo'] == repo and is_outdated(task, existing))
    if owner and owner != 'all':
        outdated = (task for task in outdated
                    if task['owner'] == owner)
    for task in outdated:
        print(tasks.format_task(task))


if __name__ == '__main__':
    sys.exit(main(*sys.argv[1:]))