#!/usr/bin/env python

from __future__ import print_function

import argparse
import arvados
import logging
import subprocess


def uuid_prefix(arv):
    return arv.users().current().execute()['uuid'][:5]


def findormake_project(arv, prefix, project_name):
    system_user_uuid = prefix+'-tpzed-000000000000000'
    groups = arv.groups().list(
        filters=[
            ['group_class', '=', 'project'],
            ['name', '=', project_name],
            ['owner_uuid', '=', system_user_uuid],
        ],
        select=['uuid']).execute()['items']
    if groups:
        uuid = groups[0]['uuid']
        logger.debug('found project %s', uuid)
        return uuid
    uuid = arv.groups().create(body={
        group_class: 'project',
        name: project_name,
        owner_uuid: system_user_uuid,
    }).execute()['uuid']
    logger.info('created project %s: %s', uuid, project_name)
    return uuid


def findormake_project_perm(arv, prefix, project_uuid):
    all_users_group_uuid = prefix+'-j7d0g-fffffffffffffff'
    if arv.links().list(
            filters=[
                ['tail_uuid', '=', all_users_group_uuid],
                ['head_uuid', '=', project_uuid],
                ['link_class', '=', 'permission'],
                ['name', '=', 'can_read'],
            ],
            select=['uuid']).execute()['items']:
        logger.debug('found permission link %s', uuid)
        return
    uuid = arv.links().create(body={
        'tail_uuid': all_users_group_uuid,
        'head_uuid': project_uuid,
        'link_class': 'permission',
        'name': 'can_read',
    }).execute()['uuid']
    logger.info('created permission link %s: %s -> %s',
                uuid, all_users_group_uuid, project_uuid)
    return uuid


def findorpull_image(want_repo, want_tag, project_uuid):
    for line in subprocess.check_output(['arv-keepdocker']).splitlines():
        try:
            repo, tag, image_id, collection, created = line.split(None, 4)
        except ValueError:
            continue
        if repo == want_repo and tag == want_tag:
            logger.debug('found image tag %s collection %s created %s',
                        tag, collection, created)
            return collection
    logger.info('pulling repo %s tag %s', want_repo, want_tag)
    subprocess.check_call([
        'arv-keepdocker',
        '--pull', '--project-uuid='+project_uuid,
        want_repo, want_tag])


def tag_latest(repo, tag, project_uuid):
    logger.debug('tagging %s:%s as %s:latest', repo, tag, repo)
    subprocess.check_call([
        'docker', 'tag', '-f', repo+':'+tag, repo+':latest'])
    logger.debug('arv-keepdocker %s:latest', repo, tag, repo)
    subprocess.check_call([
        'arv-keepdocker',
        '--project-uuid='+project_uuid,
        repo, 'latest'])


logging.basicConfig()
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

parser = argparse.ArgumentParser(
    description='Pull a specific version of the arvados/jobs image to Keep, and tag it as :latest')
parser.add_argument(
    '--git-commit', type=str, required=True,
    help='git commit hash of desired version')
parser.add_argument(
    '--verbose', '-v', action='count', default=0,
    help='print more debug messages')
args = parser.parse_args()
logger.setLevel(logging.INFO - 10 * args.verbose)

arv = arvados.api('v1')
prefix = uuid_prefix(arv)
project_uuid = findormake_project(arv, prefix, 'Arvados Standard Docker Images')
findormake_project_perm(arv, prefix, project_uuid)
findorpull_image('arvados/jobs', args.git_commit, project_uuid)
tag_latest('arvados/jobs', args.git_commit, project_uuid)