from uuid import uuid4

import os.path
import requests


def build_requests_session():
  sess = requests.Session()
  adapter = requests.adapters.HTTPAdapter(pool_connections=100,
                                          pool_maxsize=100)
  sess.mount('http://', adapter)
  sess.mount('https://', adapter)
  return sess


# The set of configuration key names that will be accessible in the client. Since these
# values are sent to the frontend, DO NOT PLACE ANY SECRETS OR KEYS in this list.
CLIENT_WHITELIST = ['SERVER_HOSTNAME', 'PREFERRED_URL_SCHEME', 'MIXPANEL_KEY',
                    'STRIPE_PUBLISHABLE_KEY', 'ENTERPRISE_LOGO_URL', 'SENTRY_PUBLIC_DSN',
                    'AUTHENTICATION_TYPE', 'REGISTRY_TITLE', 'REGISTRY_TITLE_SHORT',
                    'CONTACT_INFO', 'AVATAR_KIND', 'LOCAL_OAUTH_HANDLER', 'DOCUMENTATION_LOCATION',
                    'DOCUMENTATION_METADATA', 'SETUP_COMPLETE', 'DEBUG', 'MARKETO_MUNCHKIN_ID',
                    'STATIC_SITE_BUCKET', 'RECAPTCHA_SITE_KEY', 'CHANNEL_COLORS',
                    'TAG_EXPIRATION_OPTIONS', 'SIGNING_NAMESPACE_WHITELIST']


def frontend_visible_config(config_dict):
  visible_dict = {}
  for name in CLIENT_WHITELIST:
    if name.lower().find('secret') >= 0:
      raise Exception('Cannot whitelist secrets: %s' % name)

    if name in config_dict:
      visible_dict[name] = config_dict.get(name, None)

  return visible_dict


# Configuration that should not be changed by end users
class ImmutableConfig(object):

  # Requests based HTTP client with a large request pool
  HTTPCLIENT = build_requests_session()

  # Status tag config
  STATUS_TAGS = {}
  for tag_name in ['building', 'failed', 'none', 'ready', 'cancelled']:
    tag_path = os.path.join('buildstatus', tag_name + '.svg')
    with open(tag_path) as tag_svg:
      STATUS_TAGS[tag_name] = tag_svg.read()

  # Reverse DNS prefixes that are reserved for internal use on labels and should not be allowable
  # to be set via the API.
  DEFAULT_LABEL_KEY_RESERVED_PREFIXES = ['com.docker.', 'io.docker.', 'org.dockerproject.',
                                         'org.opencontainers.', 'io.cncf.',
                                         'io.kubernetes.', 'io.k8s.',
                                         'io.quay', 'com.coreos', 'com.tectonic',
                                         'internal', 'quay']

  # Colors for local avatars.
  AVATAR_COLORS = ['#969696', '#aec7e8', '#ff7f0e', '#ffbb78', '#2ca02c', '#98df8a', '#d62728',
                   '#ff9896', '#9467bd', '#c5b0d5', '#8c564b', '#c49c94', '#e377c2', '#f7b6d2',
                   '#7f7f7f', '#c7c7c7', '#bcbd22', '#1f77b4', '#17becf', '#9edae5', '#393b79',
                   '#5254a3', '#6b6ecf', '#9c9ede', '#9ecae1', '#31a354', '#b5cf6b', '#a1d99b',
                   '#8c6d31', '#ad494a', '#e7ba52', '#a55194']

  # Colors for channels.
  CHANNEL_COLORS = ['#969696', '#aec7e8', '#ff7f0e', '#ffbb78', '#2ca02c', '#98df8a', '#d62728',
                    '#ff9896', '#9467bd', '#c5b0d5', '#8c564b', '#c49c94', '#e377c2', '#f7b6d2',
                    '#7f7f7f', '#c7c7c7', '#bcbd22', '#1f77b4', '#17becf', '#9edae5', '#393b79',
                    '#5254a3', '#6b6ecf', '#9c9ede', '#9ecae1', '#31a354', '#b5cf6b', '#a1d99b',
                    '#8c6d31', '#ad494a', '#e7ba52', '#a55194']

  PROPAGATE_EXCEPTIONS = True


class DefaultConfig(ImmutableConfig):
  # Flask config
  JSONIFY_PRETTYPRINT_REGULAR = False
  SESSION_COOKIE_SECURE = False

  LOGGING_LEVEL = 'DEBUG'
  SEND_FILE_MAX_AGE_DEFAULT = 0
  PREFERRED_URL_SCHEME = 'http'
  SERVER_HOSTNAME = 'localhost:5000'

  REGISTRY_TITLE = 'Quay Enterprise'
  REGISTRY_TITLE_SHORT = 'Quay Enterprise'

  CONTACT_INFO = [
    'mailto:support@quay.io',
    'irc://chat.freenode.net:6665/quay',
    'tel:+1-888-930-3475',
    'https://twitter.com/quayio',
  ]

  # Mail config
  MAIL_SERVER = ''
  MAIL_USE_TLS = True
  MAIL_PORT = 587
  MAIL_USERNAME = None
  MAIL_PASSWORD = None
  MAIL_DEFAULT_SENDER = 'support@quay.io'
  MAIL_FAIL_SILENTLY = False
  TESTING = True

  # DB config
  DB_URI = 'sqlite:///test/data/test.db'
  DB_CONNECTION_ARGS = {
    'threadlocals': True,
    'autorollback': True,
  }

  @staticmethod
  def create_transaction(db):
    return db.transaction()

  DB_TRANSACTION_FACTORY = create_transaction

  # If set to true, TLS is used, but is terminated by an external service (such as a load balancer).
  # Note that PREFERRED_URL_SCHEME must be `https` when this flag is set or it can lead to undefined
  # behavior.
  EXTERNAL_TLS_TERMINATION = False

  # If true, CDN URLs will be used for our external dependencies, rather than the local
  # copies.
  USE_CDN = False

  # Authentication
  AUTHENTICATION_TYPE = 'Database'

  # Build logs
  BUILDLOGS_REDIS = {'host': 'localhost'}
  BUILDLOGS_OPTIONS = []

  # Real-time user events
  USER_EVENTS_REDIS = {'host': 'localhost'}

  # Stripe config
  BILLING_TYPE = 'FakeStripe'

  # Analytics
  ANALYTICS_TYPE = 'FakeAnalytics'

  # Build Queue Metrics
  QUEUE_METRICS_TYPE = 'Null'
  QUEUE_WORKER_METRICS_REFRESH_SECONDS = 300

  # Exception logging
  EXCEPTION_LOG_TYPE = 'FakeSentry'
  SENTRY_DSN = None
  SENTRY_PUBLIC_DSN = None

  # Github Config
  GITHUB_LOGIN_CONFIG = None
  GITHUB_TRIGGER_CONFIG = None

  # Google Config.
  GOOGLE_LOGIN_CONFIG = None

  # Bitbucket Config.
  BITBUCKET_TRIGGER_CONFIG = None

  # Gitlab Config.
  GITLAB_TRIGGER_CONFIG = None

  NOTIFICATION_QUEUE_NAME = 'notification'
  DOCKERFILE_BUILD_QUEUE_NAME = 'dockerfilebuild'
  REPLICATION_QUEUE_NAME = 'imagestoragereplication'
  SECSCAN_NOTIFICATION_QUEUE_NAME = 'security_notification'
  CHUNK_CLEANUP_QUEUE_NAME = 'chunk_cleanup'

  # Super user config. Note: This MUST BE an empty list for the default config.
  SUPER_USERS = []

  # Feature Flag: Whether sessions are permanent.
  FEATURE_PERMANENT_SESSIONS = True

  # Feature Flag: Whether super users are supported.
  FEATURE_SUPER_USERS = True

  # Feature Flag: Whether to allow anonymous users to browse and pull public repositories.
  FEATURE_ANONYMOUS_ACCESS = True

  # Feature Flag: Whether billing is required.
  FEATURE_BILLING = False

  # Feature Flag: Whether user accounts automatically have usage log access.
  FEATURE_USER_LOG_ACCESS = False

  # Feature Flag: Whether GitHub login is supported.
  FEATURE_GITHUB_LOGIN = False

  # Feature Flag: Whether Google login is supported.
  FEATURE_GOOGLE_LOGIN = False

  # Feature Flag: Whether Dex login is supported.
  FEATURE_DEX_LOGIN = False

  # Feature Flag: whether to enable support chat
  FEATURE_SUPPORT_CHAT = False

  # Feature Flag: Whether to support GitHub build triggers.
  FEATURE_GITHUB_BUILD = False

  # Feature Flag: Whether to support Bitbucket build triggers.
  FEATURE_BITBUCKET_BUILD = False

  # Feature Flag: Whether to support GitLab build triggers.
  FEATURE_GITLAB_BUILD = False

  # Feature Flag: Dockerfile build support.
  FEATURE_BUILD_SUPPORT = True

  # Feature Flag: Whether emails are enabled.
  FEATURE_MAILING = True

  # Feature Flag: Whether users can be created (by non-super users).
  FEATURE_USER_CREATION = True

  # Feature Flag: Whether users can be renamed
  FEATURE_USER_RENAME = False

  # Feature Flag: Whether non-encrypted passwords (as opposed to encrypted tokens) can be used for
  # basic auth.
  FEATURE_REQUIRE_ENCRYPTED_BASIC_AUTH = False

  # Feature Flag: Whether to automatically replicate between storage engines.
  FEATURE_STORAGE_REPLICATION = False

  # Feature Flag: Whether users can directly login to the UI.
  FEATURE_DIRECT_LOGIN = True

  # Feature Flag: Whether the v2/ endpoint is visible
  FEATURE_ADVERTISE_V2 = True

  # Semver spec for which Docker versions we will blacklist
  # Documentation: http://pythonhosted.org/semantic_version/reference.html#semantic_version.Spec
  BLACKLIST_V2_SPEC = '<1.6.0'

  # Feature Flag: Whether or not to rotate old action logs to storage.
  FEATURE_ACTION_LOG_ROTATION = False

  # Feature Flag: Whether to enable conversion to ACIs.
  FEATURE_ACI_CONVERSION = False

  # Feature Flag: Whether to allow for "namespace-less" repositories when pulling and pushing from
  # Docker.
  FEATURE_LIBRARY_SUPPORT = True

  # Feature Flag: Whether to require invitations when adding a user to a team.
  FEATURE_REQUIRE_TEAM_INVITE = True

  # Feature Flag: Whether to proxy all direct download URLs in storage via the registry's nginx.
  FEATURE_PROXY_STORAGE = False

  # Feature Flag: Whether to collect and support user metadata.
  FEATURE_USER_METADATA = False

  # Feature Flag: Whether to support signing
  FEATURE_SIGNING = False

  # Feature Flag: Whether to enable support for App repositories.
  FEATURE_APP_REGISTRY = False

  # The namespaces which should have the ability to enable signing
  SIGNING_NAMESPACE_WHITELIST = ['coreos', 'quay']

  # The namespace to use for library repositories.
  # Note: This must remain 'library' until Docker removes their hard-coded namespace for libraries.
  # See: https://github.com/docker/docker/blob/master/registry/session.go#L320
  LIBRARY_NAMESPACE = 'library'

  BUILD_MANAGER = ('enterprise', {})

  DISTRIBUTED_STORAGE_CONFIG = {
    'local_eu': ['LocalStorage', {'storage_path': 'test/data/registry/eu'}],
    'local_us': ['LocalStorage', {'storage_path': 'test/data/registry/us'}],
  }

  DISTRIBUTED_STORAGE_PREFERENCE = ['local_us']
  DISTRIBUTED_STORAGE_DEFAULT_LOCATIONS = ['local_us']

  # Health checker.
  HEALTH_CHECKER = ('LocalHealthCheck', {})

  # Userfiles
  USERFILES_LOCATION = 'local_us'
  USERFILES_PATH = 'userfiles/'

  # Build logs archive
  LOG_ARCHIVE_LOCATION = 'local_us'
  LOG_ARCHIVE_PATH = 'logarchive/'

  # Action logs archive
  ACTION_LOG_ARCHIVE_LOCATION = 'local_us'
  ACTION_LOG_ARCHIVE_PATH = 'actionlogarchive/'

  # System logs.
  SYSTEM_LOGS_PATH = "/var/log/"
  SYSTEM_LOGS_FILE = "/var/log/syslog"
  SYSTEM_SERVICES_PATH = "conf/init/service/"

  # Allow registry pulls when unable to write to the audit log
  ALLOW_PULLS_WITHOUT_STRICT_LOGGING = False

  # Services that should not be shown in the logs view.
  SYSTEM_SERVICE_BLACKLIST = []

  # Temporary tag expiration in seconds, this may actually be longer based on GC policy
  PUSH_TEMP_TAG_EXPIRATION_SEC = 60 * 60  # One hour per layer

  # Signed registry grant token expiration in seconds
  SIGNED_GRANT_EXPIRATION_SEC = 60 * 60 * 24  # One day to complete a push/pull

  # Registry v2 JWT Auth config
  REGISTRY_JWT_AUTH_MAX_FRESH_S = 60 * 60 + 60  # At most signed one hour, accounting for clock skew

  # The URL endpoint to which we redirect OAuth when generating a token locally.
  LOCAL_OAUTH_HANDLER = '/oauth/localapp'

  # The various avatar background colors.
  AVATAR_KIND = 'local'

  # The location of the Quay documentation.
  DOCUMENTATION_LOCATION = 'http://docs.quay.io'
  DOCUMENTATION_METADATA = 'https://coreos.github.io/quay-docs/search.json'

  # How often the Garbage Collection worker runs.
  GARBAGE_COLLECTION_FREQUENCY = 30 # seconds

  # How long notifications will try to send before timing out.
  NOTIFICATION_SEND_TIMEOUT = 10

  # Security scanner
  FEATURE_SECURITY_SCANNER = False
  FEATURE_SECURITY_NOTIFICATIONS = False

  # The endpoint for the security scanner.
  SECURITY_SCANNER_ENDPOINT = 'http://192.168.99.101:6060'

  # The number of seconds between indexing intervals in the security scanner
  SECURITY_SCANNER_INDEXING_INTERVAL = 30

  # If specified, the security scanner will only index images newer than the provided ID.
  SECURITY_SCANNER_INDEXING_MIN_ID = None

  # If specified, the endpoint to be used for all POST calls to the security scanner.
  SECURITY_SCANNER_ENDPOINT_BATCH = None

  # If specified, GET requests that return non-200 will be retried at the following instances.
  SECURITY_SCANNER_READONLY_FAILOVER_ENDPOINTS = []

  # The indexing engine version running inside the security scanner.
  SECURITY_SCANNER_ENGINE_VERSION_TARGET = 3

  # The version of the API to use for the security scanner.
  SECURITY_SCANNER_API_VERSION = 'v1'

  # API call timeout for the security scanner.
  SECURITY_SCANNER_API_TIMEOUT_SECONDS = 10

  # POST call timeout for the security scanner.
  SECURITY_SCANNER_API_TIMEOUT_POST_SECONDS = 480

  # The issuer name for the security scanner.
  SECURITY_SCANNER_ISSUER_NAME = 'security_scanner'

  # JWTProxy Settings
  # The address (sans schema) to proxy outgoing requests through the jwtproxy
  # to be signed
  JWTPROXY_SIGNER = 'localhost:8080'

  # The audience that jwtproxy should verify on incoming requests
  # If None, will be calculated off of the SERVER_HOSTNAME (default)
  JWTPROXY_AUDIENCE = None

  # Torrent management flags
  FEATURE_BITTORRENT = False
  BITTORRENT_PIECE_SIZE = 512 * 1024
  BITTORRENT_ANNOUNCE_URL = 'https://localhost:6881/announce'
  BITTORRENT_FILENAME_PEPPER = str(uuid4())
  BITTORRENT_WEBSEED_LIFETIME = 3600

  # "Secret" key for generating encrypted paging tokens. Only needed to be secret to
  # hide the ID range for production (in which this value is overridden). Should *not*
  # be relied upon for secure encryption otherwise.
  # This value is a Fernet key and should be 32bytes URL-safe base64 encoded.
  PAGE_TOKEN_KEY = '0OYrc16oBuksR8T3JGB-xxYSlZ2-7I_zzqrLzggBJ58='

  # The timeout for service key approval.
  UNAPPROVED_SERVICE_KEY_TTL_SEC = 60 * 60 * 24 # One day

  # How long to wait before GCing an expired service key.
  EXPIRED_SERVICE_KEY_TTL_SEC = 60 * 60 * 24 * 7 # One week

  # The ID of the user account in the database to be used for service audit logs. If none, the
  # lowest user in the database will be used.
  SERVICE_LOG_ACCOUNT_ID = None

  # The service key ID for the instance service.
  # NOTE: If changed, jwtproxy_conf.yaml.jnj must also be updated.
  INSTANCE_SERVICE_KEY_SERVICE = 'quay'

  # The location of the key ID file generated for this instance.
  INSTANCE_SERVICE_KEY_KID_LOCATION = 'conf/quay.kid'

  # The location of the private key generated for this instance.
  # NOTE: If changed, jwtproxy_conf.yaml.jnj must also be updated.
  INSTANCE_SERVICE_KEY_LOCATION = 'conf/quay.pem'

  # This instance's service key expiration in minutes.
  INSTANCE_SERVICE_KEY_EXPIRATION = 120

  # Number of minutes between expiration refresh in minutes. Should be the expiration / 2 minus
  # some additional window time.
  INSTANCE_SERVICE_KEY_REFRESH = 55

  # The whitelist of client IDs for OAuth applications that allow for direct login.
  DIRECT_OAUTH_CLIENTID_WHITELIST = []

  # URL that specifies the location of the prometheus stats aggregator.
  PROMETHEUS_AGGREGATOR_URL = 'http://localhost:9092'

  # Namespace prefix for all prometheus metrics.
  PROMETHEUS_NAMESPACE = 'quay'

  # Overridable list of reverse DNS prefixes that are reserved for internal use on labels.
  LABEL_KEY_RESERVED_PREFIXES = []

  # Delays workers from starting until a random point in time between 0 and their regular interval.
  STAGGER_WORKERS = True

  # Location of the static marketing site.
  STATIC_SITE_BUCKET = None

  # Count and duration used to produce a rate of builds allowed to be queued per repository before
  # rejecting requests. Values less than zero disable rate limiting.
  # Example: 10 builds per minute is accomplished by setting ITEMS = 10, SECS = 60
  MAX_BUILD_QUEUE_RATE_ITEMS = -1
  MAX_BUILD_QUEUE_RATE_SECS = -1

  # Site key and secret key for using recaptcha.
  FEATURE_RECAPTCHA = False
  RECAPTCHA_SITE_KEY = None
  RECAPTCHA_SECRET_KEY = None

  # Server where TUF metadata can be found
  TUF_SERVER = None

  # Prefix to add to metadata e.g. <prefix>/<namespace>/<reponame>
  TUF_GUN_PREFIX = None

  # Maximum size allowed for layers in the registry.
  MAXIMUM_LAYER_SIZE = '20G'

  # Feature Flag: Whether team syncing from the backing auth is enabled.
  FEATURE_TEAM_SYNCING = False
  TEAM_RESYNC_STALE_TIME = '30m'
  TEAM_SYNC_WORKER_FREQUENCY = 60 # seconds

  # The default configurable tag expiration time for time machine.
  DEFAULT_TAG_EXPIRATION = '2w'

  # The options to present in namespace settings for the tag expiration. If empty, no option
  # will be given and the default will be displayed read-only.
  TAG_EXPIRATION_OPTIONS = ['0s', '1d', '1w', '2w', '4w']

  # Feature Flag: Whether users can view and change their tag expiration.
  FEATURE_CHANGE_TAG_EXPIRATION = True