#!/usr/bin/env python3

# This file is part of Cockpit.
#
# Copyright (C) 2015 Red Hat, Inc.
#
# Cockpit is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Cockpit is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.

DAYS = 7

REFRESH = {
    "candlepin": { "refresh-days": 120 },
    "centos-7": { },
    "continuous-atomic": { },
    "debian-testing": { },
    "debian-stable": { },
    "fedora-29": { },
    "fedora-30": { },
    "fedora-atomic": { },
    "fedora-testing": { },
    "fedora-i386": { },
    "ipa": { "refresh-days": 120 },
    "ubuntu-1804": { },
    "ubuntu-stable": { },
    "openshift": { "refresh-days": 30 },
    'rhel-7-7': { },
    'rhel-8-0': { },
    'rhel-8-1': { },
    'rhel-atomic': { },
    "selenium": { "refresh-days": 30 },
}

import argparse
import os
import sys
import tempfile
import time
import subprocess

sys.dont_write_bytecode = True

import task
from task import github

def main():
    parser = argparse.ArgumentParser(description='Ensure necessary issue exists for image refresh')
    parser.add_argument('-v', '--verbose', action="store_true", default=False,
                        help="Print verbose information")
    parser.add_argument("image", nargs="?")
    opts = parser.parse_args()
    api = github.GitHub()

    try:
        results = scan(api, opts.image, opts.verbose)
    except RuntimeError as ex:
        sys.stderr.write("image-trigger: " + str(ex) + "\n")
        return 1

    for result in results:
        if result:
            sys.stdout.write(result + "\n")

    return 0

# Prepare an image prune command
def scan_for_prune():
    tasks = [ ]
    stamp = os.path.join(tempfile.gettempdir(), "cockpit-image-prune.stamp")

    # Don't prune more than once per hour
    try:
        mtime = os.stat(stamp).st_mtime
    except OSError:
        mtime = 0
    if mtime < time.time() - 3600:
        tasks.append("PRIORITY=0000 touch {0} && bots/image-prune".format(stamp))

    return tasks

def scan(api, force, verbose):
    subprocess.check_call([ "git", "fetch", "origin", "master" ])
    for (image, options) in REFRESH.items():
        perform = False

        if force:
            perform = image == force
        else:
            days = options.get("refresh-days", DAYS)
            perform = task.stale(days, os.path.join("bots", "images", image), "origin/master")

        if perform:
            text = "Image refresh for {0}".format(image)
            issue = task.issue(text, text, "image-refresh", image)
            sys.stderr.write("#{0}: image-refresh {1}\n".format(issue["number"], image))

    return scan_for_prune()

if __name__ == '__main__':
    sys.exit(main())