from app import tf
from data import model
from data.model import db_transaction
from data.database import QueueItem, Repository, RepositoryBuild, RepositoryBuildTrigger
from data.queue import WorkQueue
from datetime import datetime

import argparse

def disable_abusing_user(username, queue_name):
  if not username:
    raise Exception('Must enter a username')

  user = model.user.get_user(username)
  if user is None:
    raise Exception('Unknown user %s' % username)

  if not user.enabled:
    print "NOTE: User %s is already disabled" % username

  queue_prefix = '%s/%s/%%' % (queue_name, username)
  existing_queue_item_count = (QueueItem
                               .select()
                               .where(QueueItem.queue_name ** queue_prefix)
                               .where(QueueItem.available == 1,
                                      QueueItem.retries_remaining > 0,
                                      QueueItem.processing_expires > datetime.now())
                               .count())

  repository_trigger_count = (RepositoryBuildTrigger
                              .select()
                              .join(Repository)
                              .where(Repository.namespace_user == user)
                              .count())

  print "Using queue namespace %s" % queue_name
  print "User %s has email address %s" % (username, user.email)
  print "User %s has %s queued builds in their namespace" % (username, existing_queue_item_count)
  print "User %s has %s build triggers in their namespace" % (username, repository_trigger_count)

  confirm_msg = "Would you like to disable this user and delete their triggers and builds? [y/N]> "
  letter = str(raw_input(confirm_msg))
  if letter.lower() != 'y':
    print "Action canceled"
    return

  # Disable the user.
  with db_transaction():
    user.enabled = False
    user.save()

    repositories_query = Repository.select().where(Repository.namespace_user == user)
    if len(repositories_query.clone()):
      builds = list(RepositoryBuild
                    .select()
                    .where(RepositoryBuild.repository << list(repositories_query)))

      triggers = list(RepositoryBuildTrigger
                      .select()
                      .where(RepositoryBuildTrigger.repository << list(repositories_query)))

      # Delete all builds for the user's repositories.
      if builds:
        RepositoryBuild.delete().where(RepositoryBuild.id << builds).execute()

      # Delete all build triggers for the user's repositories.
      if triggers:
        (RepositoryBuildTrigger
         .delete()
         .where(RepositoryBuildTrigger.id << triggers)
         .execute())

      # Delete all queue items for the user's namespace.
      dockerfile_build_queue = WorkQueue(queue_name, tf, has_namespace=True)
      count_removed = dockerfile_build_queue.delete_namespaced_items(user.username)

  info = (username, len(triggers), count_removed)
  print "User %s disabled, %s triggers deleted, %s queued builds removed" % info


parser = argparse.ArgumentParser(description='Disables a user abusing the build system')
parser.add_argument('username', help='The username of the abuser')
parser.add_argument('queuename', help='The name of the dockerfile build queue ' +
                                      '(e.g. `dockerfilebuild` or `dockerfilebuildstaging`)')
args = parser.parse_args()
disable_abusing_user(args.username, args.queuename)