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#       or more contributor license agreements.  See the NOTICE file
#       distributed with this work for additional information
#       regarding copyright ownership.  The ASF licenses this file
#       to you under the Apache License, Version 2.0 (the
#       "License"); you may not use this file except in compliance
#       with the License.  You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
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#       software distributed under the License is distributed on an
#       "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#       KIND, either express or implied.  See the License for the
#       specific language governing permissions and limitations
#       under the License.

import shutil
import logging
import traceback

from pylons import tmpl_context as c, app_globals as g

from allura.lib.decorators import task
from allura.lib.repository import RepositoryApp

@task
def init(**kwargs):
    from allura import model as M
    c.app.repo.init()
    M.Notification.post_user(
        c.user, c.app.repo, 'created',
        text='Repository %s/%s created' % (
            c.project.shortname, c.app.config.options.mount_point))

@task
def clone(cloned_from_path, cloned_from_name, cloned_from_url):
    from allura import model as M
    try:
        c.app.repo.init_as_clone(
            cloned_from_path,
            cloned_from_name,
            cloned_from_url)
        M.Notification.post_user(
            c.user, c.app.repo, 'created',
            text='Repository %s/%s created' % (
                c.project.shortname, c.app.config.options.mount_point))
    except Exception, e:
        g.post_event('repo_clone_task_failed', cloned_from_url, cloned_from_path, traceback.format_exc())

@task
def reclone(*args, **kwargs):
    from allura import model as M
    from ming.orm import ThreadLocalORMSession
    repo = c.app.repo
    if repo is not None:
        shutil.rmtree(repo.full_fs_path, ignore_errors=True)
        repo.delete()
    ThreadLocalORMSession.flush_all()
    M.MergeRequest.query.remove(dict(
            app_config_id=c.app.config._id))
    clone(*args, **kwargs)

@task
def refresh(**kwargs):
    from allura import model as M
    log = logging.getLogger(__name__)
    #don't create multiple refresh tasks
    q = {
        'task_name': 'allura.tasks.repo_tasks.refresh',
        'state': {'$in': ['busy', 'ready']},
        'context.app_config_id': c.app.config._id,
        'context.project_id': c.project._id,
    }
    refresh_tasks_count = M.MonQTask.query.find(q).count()
    if refresh_tasks_count <= 1: #only this task
        c.app.repo.refresh()
        #checking if we have new commits arrived
        #during refresh and re-queue task if so
        new_commit_ids = c.app.repo.unknown_commit_ids()
        if len(new_commit_ids) > 0:
            refresh.post()
            log.info('New refresh task is queued due to new commit(s).')
    else:
        log.info('Refresh task for %s:%s skipped due to backlog', c.project.shortname, c.app.config.options.mount_point)

@task
def uninstall(**kwargs):
    from allura import model as M
    repo = c.app.repo
    if repo is not None:
        shutil.rmtree(repo.full_fs_path, ignore_errors=True)
        repo.delete()
    M.MergeRequest.query.remove(dict(
            app_config_id=c.app.config._id))
    super(RepositoryApp, c.app).uninstall(c.project)
    from ming.orm import ThreadLocalORMSession
    ThreadLocalORMSession.flush_all()

@task
def nop():
    log = logging.getLogger(__name__)
    log.info('nop')

@task
def reclone_repo(*args, **kwargs):
    from allura import model as M
    try:
        nbhd = M.Neighborhood.query.get(url_prefix='/%s/' % kwargs['prefix'])
        c.project = M.Project.query.get(shortname=kwargs['shortname'], neighborhood_id=nbhd._id)
        c.app = c.project.app_instance(kwargs['mount_point'])
        source_url = c.app.config.options.get('init_from_url')
        source_path = c.app.config.options.get('init_from_path')
        c.app.repo.init_as_clone(source_path, None, source_url)
        M.Notification.post_user(
            c.user, c.app.repo, 'created',
            text='Repository %s/%s created' % (
                c.project.shortname, c.app.config.options.mount_point))
    except Exception, e:
        g.post_event('repo_clone_task_failed', source_url, source_path, traceback.format_exc())

@task
def tarball(revision=None, path=None):
    log = logging.getLogger(__name__)
    if revision:
        repo = c.app.repo
        status = repo.get_tarball_status(revision, path)
        if status:
            log.info('Skipping snapshot for repository: %s:%s rev %s because it is already %s' %
                     (c.project.shortname, c.app.config.options.mount_point, revision, status))
        else:
            try:
                repo.tarball(revision, path)
            except:
                log.error('Could not create snapshot for repository: %s:%s revision %s path %s' % (c.project.shortname, c.app.config.options.mount_point, revision, path), exc_info=True)
    else:
        log.warn('Skipped creation of snapshot: %s:%s because revision is not specified' % (c.project.shortname, c.app.config.options.mount_point))