from enum import IntEnum


class BlankValueError(ValueError):
    pass


class ExtraDotsError(ValueError):
    pass


class DomainUnavailableError(ValueError):
    pass


class ActionNotAllowed(Exception):
    """User accessed an action that is not
    allowed by the current state"""

    pass


class GenericErrorCodes(IntEnum):
    """Used across the registrar for
    error mapping.
    Overview of generic error codes:
        - 1 GENERIC_ERROR a generic value error
        - 2 CANNOT_CONTACT_REGISTRY a connection error w registry
    """

    GENERIC_ERROR = 1
    CANNOT_CONTACT_REGISTRY = 2


class GenericError(Exception):
    """
    GenericError class used to raise exceptions across
    the registrar
    """

    _error_mapping = {
        GenericErrorCodes.CANNOT_CONTACT_REGISTRY: """
We’re experiencing a system connection error. Please wait a few minutes
and try again. If you continue to receive this error after a few tries,
contact help@get.gov
        """,
        GenericErrorCodes.GENERIC_ERROR: ("Value entered was wrong."),
    }

    def __init__(self, *args, code=None, **kwargs):
        super().__init__(*args, **kwargs)
        self.code = code
        if self.code in self._error_mapping:
            self.message = self._error_mapping.get(self.code)

    def __str__(self):
        return f"{self.message}"


class LoadOrganizationErrorCodes(IntEnum):
    """Used when running the load_organization_data script
    Overview of error codes:
        - 1 TRANSITION_DOMAINS_NOT_FOUND
        - 2 UPDATE_DOMAIN_INFO_FAILED
        - 3 EMPTY_TRANSITION_DOMAIN_TABLE
    """

    TRANSITION_DOMAINS_NOT_FOUND = 1
    UPDATE_DOMAIN_INFO_FAILED = 2
    EMPTY_TRANSITION_DOMAIN_TABLE = 3
    DOMAIN_NAME_WAS_NONE = 4


class LoadOrganizationError(Exception):
    """
    Error class used in the load_organization_data script
    """

    _error_mapping = {
        LoadOrganizationErrorCodes.TRANSITION_DOMAINS_NOT_FOUND: (
            "Could not find all desired TransitionDomains. " "(Possible data corruption?)"
        ),
        LoadOrganizationErrorCodes.UPDATE_DOMAIN_INFO_FAILED: "Failed to update DomainInformation",
        LoadOrganizationErrorCodes.EMPTY_TRANSITION_DOMAIN_TABLE: "No TransitionDomains exist. Cannot update.",
        LoadOrganizationErrorCodes.DOMAIN_NAME_WAS_NONE: "DomainInformation was updated, but domain was None",
    }

    def __init__(self, *args, code=None, **kwargs):
        super().__init__(*args, **kwargs)
        self.code = code
        if self.code in self._error_mapping:
            self.message = self._error_mapping.get(self.code)

    def __str__(self):
        return f"{self.message}"


class NameserverErrorCodes(IntEnum):
    """Used in the NameserverError class for
    error mapping.
    Overview of nameserver error codes:
        - 1 MISSING_IP  ip address is missing for a nameserver
        - 2 GLUE_RECORD_NOT_ALLOWED a host has a nameserver
                                    value but is not a subdomain
        - 3 INVALID_IP  invalid ip address format or invalid version
        - 4 TOO_MANY_HOSTS  more than the max allowed host values
        - 5 UNABLE_TO_UPDATE_DOMAIN unable to update the domain
        - 6 MISSING_HOST host is missing for a nameserver
        - 7 INVALID_HOST host is invalid for a nameserver
    """

    MISSING_IP = 1
    GLUE_RECORD_NOT_ALLOWED = 2
    INVALID_IP = 3
    TOO_MANY_HOSTS = 4
    UNABLE_TO_UPDATE_DOMAIN = 5
    MISSING_HOST = 6
    INVALID_HOST = 7


class NameserverError(Exception):
    """
    NameserverError class used to raise exceptions on
    the nameserver getter
    """

    _error_mapping = {
        NameserverErrorCodes.MISSING_IP: ("Using your domain for a name server requires an IP address"),
        NameserverErrorCodes.GLUE_RECORD_NOT_ALLOWED: ("Name server address does not match domain name"),
        NameserverErrorCodes.INVALID_IP: ("{}: Enter an IP address in the required format."),
        NameserverErrorCodes.TOO_MANY_HOSTS: ("Too many hosts provided, you may not have more than 13 nameservers."),
        NameserverErrorCodes.UNABLE_TO_UPDATE_DOMAIN: (
            "Unable to update domain, changes were not applied. Check logs as a Registry Error is the likely cause"
        ),
        NameserverErrorCodes.MISSING_HOST: ("Name server must be provided to enter IP address."),
        NameserverErrorCodes.INVALID_HOST: ("Enter a name server in the required format, like ns1.example.com"),
    }

    def __init__(self, *args, code=None, nameserver=None, ip=None, **kwargs):
        super().__init__(*args, **kwargs)
        self.code = code
        if self.code in self._error_mapping:
            self.message = self._error_mapping.get(self.code)
            if nameserver is not None and ip is not None:
                self.message = self.message.format(str(nameserver))
            elif nameserver is not None:
                self.message = self.message.format(str(nameserver))
            elif ip is not None:
                self.message = self.message.format(str(ip))

    def __str__(self):
        return f"{self.message}"