# Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.


class EmrError(Exception):

    """
    The base exception class for Emr exceptions.

    :ivar msg: The descriptive message associated with the error.
    """
    fmt = 'An unspecified error occured'

    def __init__(self, **kwargs):
        msg = self.fmt.format(**kwargs)
        Exception.__init__(self, msg)
        self.kwargs = kwargs


class MissingParametersError(EmrError):

    """
    One or more required parameters were not supplied.

    :ivar object_name: The object that has missing parameters.
        This can be an operation or a parameter (in the
        case of inner params).  The str() of this object
        will be used so it doesn't need to implement anything
        other than str().
    :ivar missing: The names of the missing parameters.
    """
    fmt = ('aws: error: The following required parameters are missing for '
           '{object_name}: {missing}.')


class EmptyListError(EmrError):

    """
    The provided list is empty.

    :ivar param: The provided list parameter
    """
    fmt = ('aws: error: The prameter {param} cannot be an empty list.')


class MissingRequiredInstanceGroupsError(EmrError):

    """
    In create-cluster command, none of --instance-group,
    --instance-count nor --instance-type were not supplied.
    """
    fmt = ('aws: error: Must specify either --instance-groups or '
           '--instance-type with --instance-count(optional) to '
           'configure instance groups.')


class InstanceGroupsValidationError(EmrError):

    """
    --instance-type and --instance-count are shortcut option
    for --instance-groups and they cannot be specified
    together with --instance-groups
    """
    fmt = ('aws: error: You may not specify --instance-type '
           'or --instance-count with --instance-groups, '
           'because --instance-type and --instance-count are '
           'shortcut options for --instance-groups.')


class InvalidAmiVersionError(EmrError):

    """
    The supplied ami-version is invalid.
    :ivar ami_version: The provided ami_version.
    """
    fmt = ('aws: error: The supplied AMI version "{ami_version}" is invalid.'
           ' Please see AMI Versions Supported in Amazon EMR in '
           'Amazon Elastic MapReduce Developer Guide: '
           'http://docs.aws.amazon.com/ElasticMapReduce/'
           'latest/DeveloperGuide/ami-versions-supported.html')


class MissingBooleanOptionsError(EmrError):

    """
    Required boolean options are not supplied.

    :ivar true_option
    :ivar false_option
    """
    fmt = ('aws: error: Must specify one of the following boolean options: '
           '{true_option}|{false_option}.')


class UnknownStepTypeError(EmrError):

    """
    The provided step type is not supported.

    :ivar step_type: the step_type provided.
    """
    fmt = ('aws: error: The step type {step_type} is not supported.')


class UnknownIamEndpointError(EmrError):

    """
    The IAM endpoint is not known for the specified region.

    :ivar region: The region specified.
    """
    fmt = 'IAM endpoint not known for region: {region}.' +\
          ' Specify the iam-endpoint using the --iam-endpoint option.'


class ResolveServicePrincipalError(EmrError):

    """
    The service principal could not be resolved from the region or the
    endpoint.
    """
    fmt = 'Could not resolve the service principal from' +\
          ' the region or the endpoint.'


class LogUriError(EmrError):

    """
    The LogUri is not specified and debugging is enabled for the cluster.
    """
    fmt = ('aws: error: LogUri not specified. You must specify a logUri '
           'if you enable debugging when creating a cluster.')


class MasterDNSNotAvailableError(EmrError):

    """
    Cannot get dns of master node on the cluster.
    """
    fmt = 'Cannot get DNS of master node on the cluster. '\
          ' Please try again after some time.'


class WrongPuttyKeyError(EmrError):

    """
    A wrong key has been used with a compatible program.
    """
    fmt = 'Key file file format is incorrect. Putty expects a ppk file. '\
          'Please refer to documentation at http://docs.aws.amazon.com/'\
          'ElasticMapReduce/latest/DeveloperGuide/EMR_SetUp_SSH.html. '


class SSHNotFoundError(EmrError):

    """
    SSH or Putty not available.
    """
    fmt = 'SSH or Putty not available. Please refer to the documentation '\
          'at http://docs.aws.amazon.com/ElasticMapReduce/latest/'\
          'DeveloperGuide/EMR_SetUp_SSH.html.'


class SCPNotFoundError(EmrError):

    """
    SCP or Pscp not available.
    """
    fmt = 'SCP or Pscp not available. Please refer to the documentation '\
          'at http://docs.aws.amazon.com/ElasticMapReduce/latest/'\
          'DeveloperGuide/EMR_SetUp_SSH.html. '


class SubnetAndAzValidationError(EmrError):

    """
    SubnetId and AvailabilityZone are mutual exclusive in --ec2-attributes.
    """
    fmt = ('aws: error: You may not specify both a SubnetId and an Availabili'
           'tyZone (placement) because ec2SubnetId implies a placement.')


class RequiredOptionsError(EmrError):

    """
    Either of option1 or option2 is required.
    """

    fmt = ('aws: error: Either {option1} or {option2} is required.')


class MutualExclusiveOptionError(EmrError):

    """
    The provided option1 and option2 are mutually exclusive.

    :ivar option1
    :ivar option2
    :ivar message (optional)
    """

    def __init__(self, **kwargs):
        msg = ('aws: error: You cannot specify both ' +
               kwargs.get('option1', '') + ' and ' +
               kwargs.get('option2', '') + ' options together.' +
               kwargs.get('message', ''))
        Exception.__init__(self, msg)


class MissingApplicationsError(EmrError):

    """
    The application required for a step is not installed when creating a
    cluster.

    :ivar applications
    """

    def __init__(self, **kwargs):
        msg = ('aws: error: Some of the steps require the following'
               ' applications to be installed: ' +
               ', '.join(kwargs['applications']) + '. Please install the'
               ' applications using --applications.')
        Exception.__init__(self, msg)


class ClusterTerminatedError(EmrError):

    """
    The cluster is terminating or has already terminated.
    """
    fmt = 'aws: error: Cluster terminating or already terminated.'


class ClusterStatesFilterValidationError(EmrError):

    """
    In the list-clusters command, customers can specify only one
    of the following states filters:
    --cluster-states, --active, --terminated, --failed

    """
    fmt = ('aws: error: You can specify only one of the cluster state '
           'filters: --cluster-states, --active, --terminated, --failed.')


class MissingClusterAttributesError(EmrError):

    """
    In the modify-cluster-attributes command, customers need to provide
    at least one of the following cluster attributes: --visible-to-all-users,
    --no-visible-to-all-users, --termination-protected
    and --no-termination-protected
    """
    fmt = ('aws: error: Must specify one of the following boolean options: '
           '--visible-to-all-users|--no-visible-to-all-users, '
           '--termination-protected|--no-termination-protected.')


class InvalidEmrFsArgumentsError(EmrError):

    """
    The provided EMRFS parameters are invalid as parent feature e.g.,
    Consistent View, CSE, SSE is not configured

    :ivar invalid: Invalid parameters
    :ivar parent_object_name: Parent feature name
    """

    fmt = ('aws: error: {parent_object_name} is not specified. Thus, '
           ' following parameters are invalid: {invalid}')


class DuplicateEmrFsConfigurationError(EmrError):

    fmt = ('aws: error: EMRFS should be configured either using '
           '--configuration or --emrfs but not both')


class UnknownCseProviderTypeError(EmrError):

    """
    The provided EMRFS client-side encryption provider type is not supported.

    :ivar provider_type: the provider_type provided.
    """
    fmt = ('aws: error: The client side encryption type "{provider_type}" is '
           'not supported. You must specify either KMS or Custom')


class UnknownEncryptionTypeError(EmrError):

    """
    The provided encryption type is not supported.

    :ivar provider_type: the provider_type provided.
    """
    fmt = ('aws: error: The encryption type "{encryption}" is invalid. '
           'You must specify either ServerSide or ClientSide')


class BothSseAndEncryptionConfiguredError(EmrError):

    """
    Only one of SSE or Encryption can be configured.

    :ivar sse: Value for SSE
    :ivar encryption: Value for encryption
    """

    fmt = ('aws: error: Both SSE={sse} and Encryption={encryption} are '
           'configured for --emrfs. You must specify only one of the two.')


class InvalidBooleanConfigError(EmrError):

    fmt = ("aws: error: {config_value} for {config_key} in the config file is "
           "invalid. The value should be either 'True' or 'False'. Use "
           "'aws configure set {profile_var_name}.emr.{config_key} <value>' "
           "command to set a valid value.")


class UnsupportedCommandWithReleaseError(EmrError):

    fmt = ("aws: error: {command} is not supported with "
           "'{release_label}' release.")

class MissingAutoScalingRoleError(EmrError):

    fmt = ("aws: error: Must specify --auto-scaling-role when configuring an "
           "AutoScaling policy for an instance group.")

