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# Copyright (c) 2019 Cisco and/or its affiliates.
# 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.

"""DUT PAPI command history setup library."""

from robot.api import logger

from resources.libraries.python.topology import NodeType, DICT__nodes

__all__ = ["DICT__DUTS_PAPI_HISTORY", "PapiHistory"]


DICT__DUTS_PAPI_HISTORY = dict()


class PapiHistory(object):
    """Contains methods to set up DUT PAPI command history.
    """

    @staticmethod
    def reset_papi_history(node):
        """Reset PAPI command history for DUT node.

        :param node: DUT node to reset PAPI command history for.
        :type node: dict
        """
        DICT__DUTS_PAPI_HISTORY[node['host']] = list()

    @staticmethod
    def reset_papi_history_on_all_duts(nodes):
        """Reset PAPI command history for all DUT nodes.

        :param nodes: Nodes to reset PAPI command history for.
        :type nodes: dict
        """
        for node in nodes.values():
            if node['type'] == NodeType.DUT:
                PapiHistory.reset_papi_history(node)

    @staticmethod
    def add_to_papi_history(node, csit_papi_command, papi=True, **kwargs):
        """Add command to PAPI command history on DUT node.

        Repr strings are used for argument values.

        The argument name 'csit_papi_command' must be unique enough as it cannot
        be repeated in kwargs.

        Examples of PAPI history items:

        Request without parameters:
            show_threads()

        Request with parameters:
            ipsec_select_backend(index=1,protocol=1)

        Dump:
            sw_interface_rx_placement_dump(sw_if_index=4)

        VPP Stats:
            vpp-stats(path=['^/if', '/err/ip4-input', '/sys/node/ip4-input'])

        VAT:
            sw_interface_set_flags sw_if_index 3 admin-up link-up

        :param node: DUT node to add command to PAPI command history for.
        :param csit_papi_command: Command to be added to PAPI command history.
        :param papi: Says if the command to store is PAPi or VAT. Remove when
            VAT executor is completely removed.
        :param kwargs: Optional key-value arguments.
        :type node: dict
        :type csit_papi_command: str
        :type papi: bool
        :type kwargs: dict
        """
        if papi:
            args = list()
            for key, val in kwargs.iteritems():
                args.append("{key}={val!r}".format(key=key, val=val))
            item = "{cmd}({args})".format(cmd=csit_papi_command,
                                          args=",".join(args))
        else:
            # This else part is here to store VAT commands.
            # VAT history is not used.
            # TODO: Remove when VatExecutor is completely removed.
            item = "{cmd}".format(cmd=csit_papi_command)
        DICT__DUTS_PAPI_HISTORY[node['host']].append(item)

    @staticmethod
    def show_papi_history(node):
        """Show PAPI command history for DUT node.

        :param node: DUT node to show PAPI command history for.
        :type node: dict
        """
        history_list = DICT__DUTS_PAPI_HISTORY[node['host']]
        if not history_list:
            history_list = ("No PAPI command executed", )
        logger.info(
            "{0} PAPI command history:\n{1}\n".format(
                node['host'], "\n".join(history_list)))

    @staticmethod
    def show_papi_history_on_all_duts(nodes):
        """Show PAPI command history for all DUT nodes.

        :param nodes: Nodes to show PAPI command history for.
        :type nodes: dict
        """
        for node in nodes.values():
            if node['type'] == NodeType.DUT:
                PapiHistory.show_papi_history(node)


PapiHistory.reset_papi_history_on_all_duts(DICT__nodes)