import logging
import json
import hashlib
import random
import calendar
import os

from datetime import datetime, timedelta
from peewee import (SqliteDatabase, create_model_tables, drop_model_tables, savepoint_sqlite,
                    savepoint)
from itertools import count
from uuid import UUID
from threading import Event

from email.utils import formatdate
from data.database import (db, all_models, Role, TeamRole, Visibility, LoginService,
                           BuildTriggerService, AccessTokenKind, LogEntryKind, ImageStorageLocation,
                           ImageStorageTransformation, ImageStorageSignatureKind,
                           ExternalNotificationEvent, ExternalNotificationMethod, NotificationKind)
from data import model
from app import app, storage as store

from workers import repositoryactioncounter


logger = logging.getLogger(__name__)


SAMPLE_DIFFS = ['test/data/sample/diffs/diffs%s.json' % i
                for i in range(1, 10)]

SAMPLE_CMDS = [["/bin/bash"],
               ["/bin/sh", "-c",
                "echo \"PasswordAuthentication no\" >> /etc/ssh/sshd_config"],
               ["/bin/sh", "-c",
                "sed -i 's/#\\(force_color_prompt\\)/\\1/' /etc/skel/.bashrc"],
               ["/bin/sh", "-c", "#(nop) EXPOSE [8080]"],
               ["/bin/sh", "-c",
                "#(nop) MAINTAINER Jake Moshenko <jake@devtable.com>"],
               None]

REFERENCE_DATE = datetime(2013, 6, 23)
TEST_STRIPE_ID = 'cus_2tmnh3PkXQS8NG'

IS_TESTING_REAL_DATABASE = bool(os.environ.get('TEST_DATABASE_URI'))


def __gen_checksum(image_id):
  csum = hashlib.md5(image_id)
  return 'tarsum+sha256:' + csum.hexdigest() + csum.hexdigest()


def __gen_image_id(repo, image_num):
  str_to_hash = "%s/%s/%s" % (repo.namespace_user.username, repo.name, image_num)

  img_id = hashlib.md5(str_to_hash)
  return img_id.hexdigest() + img_id.hexdigest()


def __gen_image_uuid(repo, image_num):
  str_to_hash = "%s/%s/%s" % (repo.namespace_user.username, repo.name, image_num)

  img_uuid = hashlib.md5(str_to_hash)
  return UUID(bytes=img_uuid.digest())


global_image_num = count()


def __create_subtree(repo, structure, creator_username, parent, tag_map):
  num_nodes, subtrees, last_node_tags = structure

  # create the nodes
  for model_num in range(num_nodes):
    image_num = next(global_image_num)
    docker_image_id = __gen_image_id(repo, image_num)
    logger.debug('new docker id: %s', docker_image_id)
    checksum = __gen_checksum(docker_image_id)

    new_image = model.image.find_create_or_link_image(docker_image_id, repo, None, {}, 'local_us')
    new_image_locations = new_image.storage.locations
    new_image.storage.uuid = __gen_image_uuid(repo, image_num)
    new_image.storage.uploading = False
    new_image.storage.checksum = checksum
    new_image.storage.save()

    creation_time = REFERENCE_DATE + timedelta(weeks=image_num) + timedelta(days=model_num)
    command_list = SAMPLE_CMDS[image_num % len(SAMPLE_CMDS)]
    command = json.dumps(command_list) if command_list else None
    new_image = model.image.set_image_metadata(docker_image_id, repo.namespace_user.username,
                                               repo.name, str(creation_time), 'no comment', command,
                                               parent)

    compressed_size = random.randrange(1, 1024 * 1024 * 1024)
    model.image.set_image_size(docker_image_id, repo.namespace_user.username, repo.name,
                               compressed_size, int(compressed_size * 1.4))

    # Populate the diff file
    diff_path = store.image_file_diffs_path(new_image.storage.uuid)
    source_diff = SAMPLE_DIFFS[image_num % len(SAMPLE_DIFFS)]

    with open(source_diff, 'r') as source_file:
      store.stream_write(new_image_locations, diff_path, source_file)

    parent = new_image

  if last_node_tags:
    if not isinstance(last_node_tags, list):
      last_node_tags = [last_node_tags]

    for tag_name in last_node_tags:
      new_tag = model.tag.create_or_update_tag(repo.namespace_user.username, repo.name, tag_name,
                                               new_image.docker_image_id)

      tag_map[tag_name] = new_tag

    for tag_name in last_node_tags:
      if tag_name[0] == '#':
        found_tag = tag_map[tag_name]
        found_tag.name = tag_name[1:]
        found_tag.lifetime_end_ts = tag_map[tag_name[1:]].lifetime_start_ts
        found_tag.lifetime_start_ts = found_tag.lifetime_end_ts - 10
        found_tag.save()

  for subtree in subtrees:
    __create_subtree(repo, subtree, creator_username, new_image, tag_map)


def __generate_repository(user_obj, name, description, is_public, permissions, structure):
  repo = model.repository.create_repository(user_obj.username, name, user_obj)

  if is_public:
    model.repository.set_repository_visibility(repo, 'public')

  if description:
    repo.description = description
    repo.save()

  for delegate, role in permissions:
    model.permission.set_user_repo_permission(delegate.username, user_obj.username, name, role)

  if isinstance(structure, list):
    for leaf in structure:
      __create_subtree(repo, leaf, user_obj.username, None, {})
  else:
    __create_subtree(repo, structure, user_obj.username, None, {})

  return repo


db_initialized_for_testing = Event()
testcases = {}

def finished_database_for_testing(testcase):
  """ Called when a testcase has finished using the database, indicating that
      any changes should be discarded.
  """
  testcases[testcase]['savepoint'].__exit__(True, None, None)

def setup_database_for_testing(testcase):
  """ Called when a testcase has started using the database, indicating that
      the database should be setup (if not already) and a savepoint created.
  """

  # Sanity check to make sure we're not killing our prod db
  if not IS_TESTING_REAL_DATABASE and not isinstance(db.obj, SqliteDatabase):
    raise RuntimeError('Attempted to wipe production database!')

  if not db_initialized_for_testing.is_set():
    logger.debug('Setting up DB for testing.')

    # Setup the database.
    wipe_database()
    initialize_database()
    populate_database()

    # Enable foreign key constraints.
    if not IS_TESTING_REAL_DATABASE:
      db.obj.execute_sql('PRAGMA foreign_keys = ON;')

    db_initialized_for_testing.set()

  # Create a savepoint for the testcase.
  test_savepoint = savepoint(db) if IS_TESTING_REAL_DATABASE else savepoint_sqlite(db)

  testcases[testcase] = {}
  testcases[testcase]['savepoint'] = test_savepoint
  testcases[testcase]['savepoint'].__enter__()


def initialize_database():
  create_model_tables(all_models)

  Role.create(name='admin')
  Role.create(name='write')
  Role.create(name='read')
  TeamRole.create(name='admin')
  TeamRole.create(name='creator')
  TeamRole.create(name='member')
  Visibility.create(name='public')
  Visibility.create(name='private')

  LoginService.create(name='google')
  LoginService.create(name='github')
  LoginService.create(name='quayrobot')
  LoginService.create(name='ldap')
  LoginService.create(name='jwtauthn')
  LoginService.create(name='keystone')

  BuildTriggerService.create(name='github')
  BuildTriggerService.create(name='custom-git')
  BuildTriggerService.create(name='bitbucket')
  BuildTriggerService.create(name='gitlab')

  AccessTokenKind.create(name='build-worker')
  AccessTokenKind.create(name='pushpull-token')

  LogEntryKind.create(name='account_change_plan')
  LogEntryKind.create(name='account_change_cc')
  LogEntryKind.create(name='account_change_password')
  LogEntryKind.create(name='account_convert')

  LogEntryKind.create(name='create_robot')
  LogEntryKind.create(name='delete_robot')

  LogEntryKind.create(name='create_repo')
  LogEntryKind.create(name='push_repo')
  LogEntryKind.create(name='pull_repo')
  LogEntryKind.create(name='delete_repo')
  LogEntryKind.create(name='create_tag')
  LogEntryKind.create(name='move_tag')
  LogEntryKind.create(name='delete_tag')
  LogEntryKind.create(name='revert_tag')
  LogEntryKind.create(name='add_repo_permission')
  LogEntryKind.create(name='change_repo_permission')
  LogEntryKind.create(name='delete_repo_permission')
  LogEntryKind.create(name='change_repo_visibility')
  LogEntryKind.create(name='add_repo_accesstoken')
  LogEntryKind.create(name='delete_repo_accesstoken')
  LogEntryKind.create(name='set_repo_description')

  LogEntryKind.create(name='build_dockerfile')

  LogEntryKind.create(name='org_create_team')
  LogEntryKind.create(name='org_delete_team')
  LogEntryKind.create(name='org_invite_team_member')
  LogEntryKind.create(name='org_delete_team_member_invite')
  LogEntryKind.create(name='org_add_team_member')
  LogEntryKind.create(name='org_team_member_invite_accepted')
  LogEntryKind.create(name='org_team_member_invite_declined')
  LogEntryKind.create(name='org_remove_team_member')
  LogEntryKind.create(name='org_set_team_description')
  LogEntryKind.create(name='org_set_team_role')

  LogEntryKind.create(name='create_prototype_permission')
  LogEntryKind.create(name='modify_prototype_permission')
  LogEntryKind.create(name='delete_prototype_permission')

  LogEntryKind.create(name='setup_repo_trigger')
  LogEntryKind.create(name='delete_repo_trigger')

  LogEntryKind.create(name='create_application')
  LogEntryKind.create(name='update_application')
  LogEntryKind.create(name='delete_application')
  LogEntryKind.create(name='reset_application_client_secret')

  # Note: These next two are deprecated.
  LogEntryKind.create(name='add_repo_webhook')
  LogEntryKind.create(name='delete_repo_webhook')

  LogEntryKind.create(name='add_repo_notification')
  LogEntryKind.create(name='delete_repo_notification')

  LogEntryKind.create(name='regenerate_robot_token')

  LogEntryKind.create(name='repo_verb')

  ImageStorageLocation.create(name='local_eu')
  ImageStorageLocation.create(name='local_us')

  ImageStorageTransformation.create(name='squash')
  ImageStorageTransformation.create(name='aci')

  ImageStorageSignatureKind.create(name='gpg2')

  # NOTE: These MUST be copied over to NotificationKind, since every external
  # notification can also generate a Quay.io notification.
  ExternalNotificationEvent.create(name='repo_push')
  ExternalNotificationEvent.create(name='build_queued')
  ExternalNotificationEvent.create(name='build_start')
  ExternalNotificationEvent.create(name='build_success')
  ExternalNotificationEvent.create(name='build_failure')

  ExternalNotificationMethod.create(name='quay_notification')
  ExternalNotificationMethod.create(name='email')
  ExternalNotificationMethod.create(name='webhook')

  ExternalNotificationMethod.create(name='flowdock')
  ExternalNotificationMethod.create(name='hipchat')
  ExternalNotificationMethod.create(name='slack')

  NotificationKind.create(name='repo_push')
  NotificationKind.create(name='build_queued')
  NotificationKind.create(name='build_start')
  NotificationKind.create(name='build_success')
  NotificationKind.create(name='build_failure')

  NotificationKind.create(name='password_required')
  NotificationKind.create(name='over_private_usage')
  NotificationKind.create(name='expiring_license')
  NotificationKind.create(name='maintenance')
  NotificationKind.create(name='org_team_invite')

  NotificationKind.create(name='test_notification')


def wipe_database():
  logger.debug('Wiping all data from the DB.')

  # Sanity check to make sure we're not killing our prod db
  if not IS_TESTING_REAL_DATABASE and not isinstance(db.obj, SqliteDatabase):
    raise RuntimeError('Attempted to wipe production database!')

  drop_model_tables(all_models, fail_silently=True)


def populate_database():
  logger.debug('Populating the DB with test data.')

  new_user_1 = model.user.create_user('devtable', 'password', 'jschorr@devtable.com')
  new_user_1.verified = True
  new_user_1.stripe_id = TEST_STRIPE_ID
  new_user_1.save()

  disabled_user = model.user.create_user('disabled', 'password', 'jschorr+disabled@devtable.com')
  disabled_user.verified = True
  disabled_user.enabled = False
  disabled_user.save()

  dtrobot = model.user.create_robot('dtrobot', new_user_1)

  new_user_2 = model.user.create_user('public', 'password', 'jacob.moshenko@gmail.com')
  new_user_2.verified = True
  new_user_2.save()

  new_user_3 = model.user.create_user('freshuser', 'password', 'jschorr+test@devtable.com')
  new_user_3.verified = True
  new_user_3.save()

  model.user.create_robot('anotherrobot', new_user_3)

  new_user_4 = model.user.create_user('randomuser', 'password', 'no4@thanks.com')
  new_user_4.verified = True
  new_user_4.save()

  new_user_5 = model.user.create_user('unverified', 'password', 'no5@thanks.com')
  new_user_5.save()

  reader = model.user.create_user('reader', 'password', 'no1@thanks.com')
  reader.verified = True
  reader.save()

  creatoruser = model.user.create_user('creator', 'password', 'noc@thanks.com')
  creatoruser.verified = True
  creatoruser.save()

  outside_org = model.user.create_user('outsideorg', 'password', 'no2@thanks.com')
  outside_org.verified = True
  outside_org.save()

  model.notification.create_notification('test_notification', new_user_1,
                                         metadata={'some':'value',
                                                   'arr':[1, 2, 3],
                                                   'obj':{'a':1, 'b':2}})

  from_date = datetime.utcnow()
  to_date = from_date + timedelta(hours=1)
  notification_metadata = {
    'from_date': formatdate(calendar.timegm(from_date.utctimetuple())),
    'to_date': formatdate(calendar.timegm(to_date.utctimetuple())),
    'reason': 'database migration'
  }
  model.notification.create_notification('maintenance', new_user_1, metadata=notification_metadata)


  __generate_repository(new_user_4, 'randomrepo', 'Random repo repository.', False,
                        [], (4, [], ['latest', 'prod']))

  simple_repo = __generate_repository(new_user_1, 'simple', 'Simple repository.', False,
                                      [], (4, [], ['latest', 'prod']))

  __generate_repository(new_user_1, 'sharedtags',
                        'Shared tags repository',
                        False, [(new_user_2, 'read'), (dtrobot[0], 'read')],
                        (2, [(3, [], ['v2.0', 'v2.1', 'v2.2']),
                             (1, [(1, [(1, [], ['prod', '581a284'])],
                                   ['staging', '8423b58']),
                                  (1, [], None)], None)], None))

  __generate_repository(new_user_1, 'history', 'Historical repository.', False,
                        [], (4, [(2, [], 'latest'), (3, [], '#latest')], None))

  __generate_repository(new_user_1, 'complex',
                        'Complex repository with many branches and tags.',
                        False, [(new_user_2, 'read'), (dtrobot[0], 'read')],
                        (2, [(3, [], 'v2.0'),
                             (1, [(1, [(1, [], ['prod'])],
                                   'staging'),
                                  (1, [], None)], None)], None))

  __generate_repository(new_user_1, 'gargantuan', None, False, [],
                        (2, [(3, [], 'v2.0'),
                             (1, [(1, [(1, [], ['latest', 'prod'])],
                                   'staging'),
                                  (1, [], None)], None),
                             (20, [], 'v3.0'),
                             (5, [], 'v4.0'),
                             (1, [(1, [], 'v5.0'), (1, [], 'v6.0')], None)],
                         None))

  __generate_repository(new_user_2, 'publicrepo',
                        'Public repository pullable by the world.', True,
                        [], (10, [], 'latest'))

  __generate_repository(outside_org, 'coolrepo',
                        'Some cool repo.', False,
                        [],
                        (5, [], 'latest'))

  __generate_repository(new_user_1, 'shared',
                        'Shared repository, another user can write.', False,
                        [(new_user_2, 'write'), (reader, 'read')],
                        (5, [], 'latest'))

  building = __generate_repository(new_user_1, 'building',
                                   'Empty repository which is building.',
                                   False, [], (0, [], None))

  new_token = model.token.create_access_token(building, 'write', 'build-worker')

  trigger = model.build.create_build_trigger(building, 'github', '123authtoken', new_user_1,
                                             pull_robot=dtrobot[0])
  trigger.config = json.dumps({
    'build_source': 'jakedt/testconnect',
    'subdir': '',
  })
  trigger.save()

  repo = 'ci.devtable.com:5000/%s/%s' % (building.namespace_user.username, building.name)
  job_config = {
    'repository': repo,
    'docker_tags': ['latest'],
    'build_subdir': '',
    'trigger_metadata': {
      'commit': '3482adc5822c498e8f7db2e361e8d57b3d77ddd9',
      'ref': 'refs/heads/master',
      'default_branch': 'master'
    }
  }

  model.repository.star_repository(new_user_1, simple_repo)

  record = model.repository.create_email_authorization_for_repo(new_user_1.username, 'simple',
                                                                'jschorr@devtable.com')
  record.confirmed = True
  record.save()

  model.repository.create_email_authorization_for_repo(new_user_1.username, 'simple',
                                                       'jschorr+other@devtable.com')

  build2 = model.build.create_repository_build(building, new_token, job_config,
                                               '68daeebd-a5b9-457f-80a0-4363b882f8ea',
                                               'build-name', trigger)
  build2.uuid = 'deadpork-dead-pork-dead-porkdeadpork'
  build2.save()

  build3 = model.build.create_repository_build(building, new_token, job_config,
                                               'f49d07f9-93da-474d-ad5f-c852107c3892',
                                               'build-name', trigger)
  build3.uuid = 'deadduck-dead-duck-dead-duckdeadduck'
  build3.save()

  build1 = model.build.create_repository_build(building, new_token, job_config,
                                               '701dcc3724fb4f2ea6c31400528343cd', 'build-name',
                                               trigger)
  build1.uuid = 'deadbeef-dead-beef-dead-beefdeadbeef'
  build1.save()

  org = model.organization.create_organization('buynlarge', 'quay@devtable.com', new_user_1)
  org.stripe_id = TEST_STRIPE_ID
  org.save()

  model.user.create_robot('coolrobot', org)

  model.oauth.create_application(org, 'Some Test App', 'http://localhost:8000',
                                 'http://localhost:8000/o2c.html', client_id='deadbeef')

  model.oauth.create_application(org, 'Some Other Test App', 'http://quay.io',
                                 'http://localhost:8000/o2c.html', client_id='deadpork',
                                 description='This is another test application')

  model.oauth.create_access_token_for_testing(new_user_1, 'deadbeef', 'repo:admin')

  model.user.create_robot('neworgrobot', org)

  ownerbot = model.user.create_robot('ownerbot', org)[0]
  creatorbot = model.user.create_robot('creatorbot', org)[0]

  owners = model.team.get_organization_team('buynlarge', 'owners')
  owners.description = 'Owners have unfetterd access across the entire org.'
  owners.save()

  org_repo = __generate_repository(org, 'orgrepo', 'Repository owned by an org.', False,
                                   [(outside_org, 'read')], (4, [], ['latest', 'prod']))

  __generate_repository(org, 'anotherorgrepo', 'Another repository owned by an org.', False,
                        [], (4, [], ['latest', 'prod']))

  creators = model.team.create_team('creators', org, 'creator', 'Creators of orgrepo.')

  reader_team = model.team.create_team('readers', org, 'member', 'Readers of orgrepo.')
  model.permission.set_team_repo_permission(reader_team.name, org_repo.namespace_user.username,
                                            org_repo.name, 'read')

  model.team.add_user_to_team(new_user_2, reader_team)
  model.team.add_user_to_team(reader, reader_team)
  model.team.add_user_to_team(ownerbot, owners)
  model.team.add_user_to_team(creatorbot, creators)
  model.team.add_user_to_team(creatoruser, creators)

  __generate_repository(new_user_1, 'superwide', None, False, [],
                        [(10, [], 'latest2'),
                         (2, [], 'latest3'),
                         (2, [(1, [], 'latest11'), (2, [], 'latest12')],
                          'latest4'),
                         (2, [], 'latest5'),
                         (2, [], 'latest6'),
                         (2, [], 'latest7'),
                         (2, [], 'latest8'),
                         (2, [], 'latest9'),
                         (2, [], 'latest10'),
                         (2, [], 'latest13'),
                         (2, [], 'latest14'),
                         (2, [], 'latest15'),
                         (2, [], 'latest16'),
                         (2, [], 'latest17'),
                         (2, [], 'latest18')])

  model.permission.add_prototype_permission(org, 'read', activating_user=new_user_1,
                                            delegate_user=new_user_2)
  model.permission.add_prototype_permission(org, 'read', activating_user=new_user_1,
                                            delegate_team=reader_team)
  model.permission.add_prototype_permission(org, 'write', activating_user=new_user_2,
                                            delegate_user=new_user_1)

  today = datetime.today()
  week_ago = today - timedelta(6)
  six_ago = today - timedelta(5)
  four_ago = today - timedelta(4)

  model.log.log_action('org_create_team', org.username, performer=new_user_1,
                       timestamp=week_ago, metadata={'team': 'readers'})

  model.log.log_action('org_set_team_role', org.username, performer=new_user_1,
                       timestamp=week_ago,
                       metadata={'team': 'readers', 'role': 'read'})

  model.log.log_action('create_repo', org.username, performer=new_user_1,
                       repository=org_repo, timestamp=week_ago,
                       metadata={'namespace': org.username, 'repo': 'orgrepo'})

  model.log.log_action('change_repo_permission', org.username,
                       performer=new_user_2, repository=org_repo,
                       timestamp=six_ago,
                       metadata={'username': new_user_1.username,
                                 'repo': 'orgrepo', 'role': 'admin'})

  model.log.log_action('change_repo_permission', org.username,
                       performer=new_user_1, repository=org_repo,
                       timestamp=six_ago,
                       metadata={'username': new_user_2.username,
                                 'repo': 'orgrepo', 'role': 'read'})

  model.log.log_action('add_repo_accesstoken', org.username, performer=new_user_1,
                       repository=org_repo, timestamp=four_ago,
                       metadata={'repo': 'orgrepo', 'token': 'deploytoken'})

  model.log.log_action('push_repo', org.username, performer=new_user_2,
                       repository=org_repo, timestamp=today,
                       metadata={'username': new_user_2.username,
                                 'repo': 'orgrepo'})

  model.log.log_action('pull_repo', org.username, performer=new_user_2,
                       repository=org_repo, timestamp=today,
                       metadata={'username': new_user_2.username,
                                 'repo': 'orgrepo'})

  model.log.log_action('pull_repo', org.username, repository=org_repo,
                       timestamp=today,
                       metadata={'token': 'sometoken', 'token_code': 'somecode',
                                 'repo': 'orgrepo'})

  model.log.log_action('delete_tag', org.username, performer=new_user_2,
                       repository=org_repo, timestamp=today,
                       metadata={'username': new_user_2.username,
                                 'repo': 'orgrepo', 'tag': 'sometag'})

  model.log.log_action('pull_repo', org.username, repository=org_repo,
                       timestamp=today,
                       metadata={'token_code': 'somecode', 'repo': 'orgrepo'})

  model.log.log_action('build_dockerfile', new_user_1.username, repository=building,
                       timestamp=today,
                       metadata={'repo': 'building', 'namespace': new_user_1.username,
                                 'trigger_id': trigger.uuid, 'config': json.loads(trigger.config),
                                 'service': trigger.service.name})

  while repositoryactioncounter.count_repository_actions():
    pass

if __name__ == '__main__':
  log_level = getattr(logging, app.config['LOGGING_LEVEL'])
  logging.basicConfig(level=log_level)

  if not IS_TESTING_REAL_DATABASE and not isinstance(db.obj, SqliteDatabase):
    raise RuntimeError('Attempted to initialize production database!')

  initialize_database()

  if app.config.get('POPULATE_DB_TEST_DATA', False):
    populate_database()