import logging
import json
import hashlib
import random

from datetime import datetime, timedelta
from peewee import (SqliteDatabase, create_model_tables, drop_model_tables,
                    savepoint_sqlite)

from data.database import *
from data import model
from app import app


logger = logging.getLogger(__name__)
store = app.config['STORAGE']

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

IMAGE_UUIDS = ['ab5160d1-8fb4-4022-a135-3c4de7f6ed97',
               '4259533e-868d-4db3-9a78-fc24ffc03a2b',
               'c2c6dc6e-24d1-4f15-a616-81c41e3e3629',
               '8ec59952-8f5a-4fa0-897e-57c3337e1914',
               '08a8ab1f-4aaa-4337-88ab-5b5c71a8d492',
               '4a71f3db-cbb1-4c3b-858f-1be032b3e875',
               'd40d531a-c70c-47f9-bf5b-2a4381db2d60',
               '6fe6cebb-52b2-4036-892e-b86d6487a56b',
               'e969ff76-e87d-4ea3-8cb3-0db9b5bcb8d9',
               '2e3b616b-301f-437c-98ab-37352f444a60',
              ]

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'

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


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

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


global_image_num = [0]
def __create_subtree(repo, structure, creator_username, parent):
  num_nodes, subtrees, last_node_tags = structure

  # create the nodes
  for i in range(num_nodes):
    image_num = global_image_num[0]
    global_image_num[0] += 1
    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.create_or_link_image(docker_image_id, repo, None)
    new_image.storage.uuid = IMAGE_UUIDS[image_num % len(IMAGE_UUIDS)]
    new_image.storage.save()

    model.set_image_checksum(docker_image_id, repo, checksum)

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

    model.set_image_size(docker_image_id, repo.namespace, repo.name,
                         random.randrange(1, 1024 * 1024 * 1024))

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

    with open(source_diff, 'r') as source_file:
      store.stream_write(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:
      model.create_or_update_tag(repo.namespace, repo.name, tag_name,
                                 new_image.docker_image_id)

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


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

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

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

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

  if isinstance(structure, list):
    for s in structure:
      __create_subtree(repo, s, user.username, None)
  else:
    __create_subtree(repo, structure, user.username, None)

  return repo


db_initialized_for_testing = False
testcases = {}

def finished_database_for_testing(testcase):
  """ Called when a testcase has finished using the database, indicating that
      any changes should be discarded.
  """
  global testcases
  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
  db = model.db
  if (not isinstance(model.db, SqliteDatabase) or
      app.config['DB_DRIVER'] is not SqliteDatabase):
    raise RuntimeError('Attempted to wipe production database!')

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

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

    db_initialized_for_testing = True

  # Create a savepoint for the testcase.
  global testcases  
  testcases[testcase] = {}
  testcases[testcase]['savepoint'] = savepoint_sqlite(db)
  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='github')
  LoginService.create(name='quayrobot')
  
  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='delete_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='add_repo_webhook')
  LogEntryKind.create(name='delete_repo_webhook')
  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_add_team_member')
  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')
  

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

  # Sanity check to make sure we're not killing our prod db
  db = model.db
  if (not isinstance(model.db, SqliteDatabase) or
      app.config['DB_DRIVER'] is not 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.create_user('devtable', 'password',
                                 'jschorr@devtable.com')
  new_user_1.verified = True
  new_user_1.stripe_id = TEST_STRIPE_ID
  new_user_1.save()

  model.create_robot('dtrobot', new_user_1)

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

  new_user_3 = model.create_user('freshuser', 'password', 'no@thanks.com')
  new_user_3.verified = True
  new_user_3.save()

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

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

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

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

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

  __generate_repository(new_user_1, 'complex',
                        'Complex repository with many branches and tags.',
                        False, [(new_user_2, '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))

  token = model.create_access_token(building, 'write')
  tag = 'ci.devtable.com:5000/%s/%s' % (building.namespace, building.name)
  build = model.create_repository_build(building, token, '701dcc3724fb4f2ea6c31400528343cd',
                                        tag, 'build-name')
  build.uuid = 'deadbeef-dead-beef-dead-beefdeadbeef'
  build.save()

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

  model.create_robot('neworgrobot', org)

  owners = model.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']))

  org_repo2 = __generate_repository(org, 'anotherorgrepo',
                                    'Another repository owned by an org.', False,
                                    [],
                                    (4, [], ['latest', 'prod']))

  reader_team = model.create_team('readers', org, 'member',
                                  'Readers of orgrepo.')
  model.set_team_repo_permission(reader_team.name, org_repo.namespace,
                                 org_repo.name, 'read')
  model.add_user_to_team(new_user_2, reader_team)
  model.add_user_to_team(reader, reader_team)

  __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.add_prototype_permission(org, 'read', activating_user=new_user_1,
                                 delegate_user=new_user_2)
  model.add_prototype_permission(org, 'read', activating_user=new_user_1,
                                 delegate_team=reader_team)
  model.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_action('org_create_team', org.username, performer=new_user_1,
                   timestamp=week_ago, metadata={'team': 'readers'})

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

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

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

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

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

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

if __name__ == '__main__':
  app.config['LOGGING_CONFIG']()
  initialize_database()

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