# Copyright (c) 2015 Hewlett Packard Development Company, L.P.
# 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. You may obtain
# a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.

import six

from kmip.core import enums
from kmip.core import primitives
from kmip.core import utils


class ActivateRequestPayload(primitives.Struct):
    """
    A request payload for the Activate operation.

    Attributes:
        unique_identifier: The unique ID of the managed object to activate
            on the server.
    """
    def __init__(self,
                 unique_identifier=None):
        """
        Construct an Activate request payload struct.

        Args:
            unique_identifier (string): The ID of the managed object (e.g., a
                symmetric key) to activate. Optional, defaults to None.
        """
        super(ActivateRequestPayload, self).__init__(
            tag=enums.Tags.REQUEST_PAYLOAD)

        self._unique_identifier = None

        self.unique_identifier = unique_identifier

    @property
    def unique_identifier(self):
        if self._unique_identifier:
            return self._unique_identifier.value
        else:
            return None

    @unique_identifier.setter
    def unique_identifier(self, value):
        if value is None:
            self._unique_identifier = None
        elif isinstance(value, six.string_types):
            self._unique_identifier = primitives.TextString(
                value=value,
                tag=enums.Tags.UNIQUE_IDENTIFIER
            )
        else:
            raise TypeError("Unique identifier must be a string.")

    def read(self, input_stream):
        """
        Read the data encoding the Activate request payload and decode it
        into its constituent parts.
        Args:
            input_stream (stream): A data stream containing encoded object
                data, supporting a read method; usually a BytearrayStream
                object.
        """
        super(ActivateRequestPayload, self).read(input_stream)
        local_stream = utils.BytearrayStream(input_stream.read(self.length))

        if self.is_tag_next(enums.Tags.UNIQUE_IDENTIFIER, local_stream):
            self._unique_identifier = primitives.TextString(
                tag=enums.Tags.UNIQUE_IDENTIFIER
            )
            self._unique_identifier.read(local_stream)

        self.is_oversized(local_stream)

    def write(self, output_stream):
        """
        Write the data encoding the Activate request payload to a stream.

        Args:
            output_stream (stream): A data stream in which to encode object
                data, supporting a write method; usually a BytearrayStream
                object.
        """
        local_stream = utils.BytearrayStream()

        if self._unique_identifier is not None:
            self._unique_identifier.write(local_stream)

        self.length = local_stream.length()
        super(ActivateRequestPayload, self).write(output_stream)
        output_stream.write(local_stream.buffer)

    def __eq__(self, other):
        if isinstance(other, ActivateRequestPayload):
            if self.unique_identifier != other.unique_identifier:
                return False
            else:
                return True
        else:
            return NotImplemented

    def __ne__(self, other):
        if isinstance(other, ActivateRequestPayload):
            return not (self == other)
        else:
            return NotImplemented

    def __repr__(self):
        arg = "unique_identifier='{0}'".format(self.unique_identifier)
        return "ActivateRequestPayload({0})".format(arg)

    def __str__(self):
        return str({'unique_identifier': self.unique_identifier})


class ActivateResponsePayload(primitives.Struct):
    """
    A response payload for the Activate operation.

    Attributes:
        unique_identifier: The unique ID of the managed object that was
            activated on the server.
    """
    def __init__(self,
                 unique_identifier=None):
        """
        Construct an Activate response payload struct.

        Args:
            unique_identifier (string): The ID of the managed object (e.g., a
                symmetric key) that was activated. Optional, defaults to None.
                Required for read/write.
        """
        super(ActivateResponsePayload, self).__init__(
            tag=enums.Tags.RESPONSE_PAYLOAD)

        self._unique_identifier = None

        self.unique_identifier = unique_identifier

    @property
    def unique_identifier(self):
        if self._unique_identifier:
            return self._unique_identifier.value
        else:
            return None

    @unique_identifier.setter
    def unique_identifier(self, value):
        if value is None:
            self._unique_identifier = None
        elif isinstance(value, six.string_types):
            self._unique_identifier = primitives.TextString(
                value=value,
                tag=enums.Tags.UNIQUE_IDENTIFIER
            )
        else:
            raise TypeError("Unique identifier must be a string.")

    def read(self, input_stream):
        """
        Read the data encoding the Activate response payload and decode it
        into its constituent parts.

        Args:
            input_stream (stream): A data stream containing encoded object
                data, supporting a read method; usually a BytearrayStream
                object.
        """
        super(ActivateResponsePayload, self).read(input_stream)
        local_stream = utils.BytearrayStream(input_stream.read(self.length))

        if self.is_tag_next(enums.Tags.UNIQUE_IDENTIFIER, local_stream):
            self._unique_identifier = primitives.TextString(
                tag=enums.Tags.UNIQUE_IDENTIFIER
            )
            self._unique_identifier.read(local_stream)
        else:
            raise ValueError(
                "Parsed payload encoding is missing the unique identifier "
                "field."
            )

        self.is_oversized(local_stream)

    def write(self, output_stream):
        """
        Write the data encoding the Activate response payload to a stream.

        Args:
            output_stream (stream): A data stream in which to encode object
                data, supporting a write method; usually a BytearrayStream
                object.
        """
        local_stream = utils.BytearrayStream()

        if self.unique_identifier:
            self._unique_identifier.write(local_stream)
        else:
            raise ValueError(
                "Payload is missing the unique identifier field."
            )
        self.length = local_stream.length()
        super(ActivateResponsePayload, self).write(output_stream)
        output_stream.write(local_stream.buffer)

    def __eq__(self, other):
        if isinstance(other, ActivateResponsePayload):
            if self.unique_identifier != other.unique_identifier:
                return False
            else:
                return True
        else:
            return NotImplemented

    def __ne__(self, other):
        if isinstance(other, ActivateResponsePayload):
            return not (self == other)
        else:
            return NotImplemented

    def __repr__(self):
        arg = "unique_identifier='{0}'".format(self.unique_identifier)
        return "ActivateResponsePayload({0})".format(arg)

    def __str__(self):
        return str({'unique_identifier': self.unique_identifier})