# Copyright 2019 Intel, Inc.
# 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.

from jsonschema import validate
import logging

from sushy.resources import base

from rsd_lib import base as rsd_lib_base
from rsd_lib.resources.v2_2.telemetry_service import trigger_schemas
from rsd_lib import utils as rsd_lib_utils


LOG = logging.getLogger(__name__)


class DiscreteTriggerCollectionField(base.ListField):
    """DiscreteTrigger field

       A discrete trigger.
    """

    name = base.Field("Name")
    """The name of trigger."""

    value = base.Field("Value")
    """This property contains the value of the trigger."""

    dwell_tim_msec = base.Field(
        "DwellTimMsec", adapter=rsd_lib_utils.num_or_none
    )
    """This time the excursion persists before a trigger is determined."""

    severity = base.Field("Severity")
    """This property contains the value of the Severity property in the Event
       message.
    """


class WildcardCollectionField(base.ListField):
    """Wildcard field

       Wildcards used to replace values in MetricProperties array property.
    """

    name = base.Field("Name")
    """The name of Wildcard."""

    values = base.Field("Values")
    """An array of values to substitute for the wildcard."""


class NumericTriggerCollectionField(base.ListField):
    """NumericTrigger field

       A numeric trigger.
    """

    name = base.Field("Name")
    """The name of trigger."""

    value = base.Field("Value", adapter=rsd_lib_utils.num_or_none)
    """This property contains the value of the trigger."""

    direction_of_crossing = base.Field("DirectionOfCrossing")
    """This property contains the value of the trigger."""

    dwell_tim_msec = base.Field(
        "DwellTimMsec", adapter=rsd_lib_utils.num_or_none
    )
    """This time the excursion persists before a trigger is determined."""

    severity = base.Field("Severity")
    """This property contains the value of the Severity property in the Event
       message.
    """


class Triggers(rsd_lib_base.ResourceBase):
    """Triggers resource class

       This is the schema definition for a Triggers.
    """

    metric_type = base.Field("MetricType")
    """The type of trigger."""

    trigger_actions = base.Field("TriggerActions")
    """This property specifies what action is perform when the MetricTrigger
       occurs.
    """

    numeric_triggers = NumericTriggerCollectionField("NumericTriggers")
    """List of numeric triggers."""

    discrete_trigger_condition = base.Field("DiscreteTriggerCondition")
    """The type of trigger."""

    discrete_triggers = DiscreteTriggerCollectionField("DiscreteTriggers")
    """List of discrete triggers."""

    status = rsd_lib_base.StatusField("Status")
    """This indicates the known state of the resource, such as if it is
       enabled.
    """

    wildcards = WildcardCollectionField("Wildcards")
    """Wildcards used to replace values in MetricProperties array property."""

    metric_properties = base.Field("MetricProperties")
    """A collection of URI for the properties on which this metric definition
       is defined.
    """


class TriggersCollection(rsd_lib_base.ResourceCollectionBase):
    @property
    def _resource_type(self):
        return Triggers

    def create_trigger(
        self,
        name=None,
        description=None,
        metric_type=None,
        trigger_actions=None,
        numeric_triggers=None,
        discrete_trigger_condition=None,
        discrete_triggers=None,
        status=None,
        wildcards=None,
        metric_properties=None,
    ):
        """Create a new trigger

        :param name: The trigger name
        :param description: The trigger description
        :param metric_type: The type of trigger
        :param trigger_actions: The metric report description
        :param numeric_triggers: List of numeric triggers
        :param discrete_trigger_condition: The value shall indicate how the
                                           corresponding metric
        :param discrete_triggers: List of discrete triggers
        :param status: The trigger status
        :param wildcards: Wildcards used to replace values in MetricProperties
                          array property
        :param metric_properties: The report definition metric properties
        :returns: The uri of the new trigger
        """
        target_uri = self._path

        # prepare the request data of creating new trigger
        data = {}
        if name is not None:
            data["Name"] = name
        if description is not None:
            data["Description"] = description

        if metric_type is not None:
            validate(metric_type, trigger_schemas.metric_type_schema)
            data["MetricType"] = metric_type

        if trigger_actions is not None:
            validate(trigger_actions, trigger_schemas.trigger_actions_schema)
            data["TriggerActions"] = trigger_actions

        if numeric_triggers is not None:
            validate(numeric_triggers, trigger_schemas.numeric_triggers_schema)
            data["NumericTriggers"] = numeric_triggers

        if discrete_trigger_condition is not None:
            validate(
                discrete_trigger_condition,
                trigger_schemas.discrete_trigger_condition_schema,
            )
            data["DiscreteTriggerCondition"] = discrete_trigger_condition

        if discrete_triggers is not None:
            validate(
                discrete_triggers, trigger_schemas.discrete_triggers_schema
            )
            data["DiscreteTriggers"] = discrete_triggers

        if status is not None:
            validate(status, trigger_schemas.status_schema)
            data["Status"] = status

        if wildcards is not None:
            validate(wildcards, trigger_schemas.wildcards_schema)
            data["Wildcards"] = wildcards

        if metric_properties is not None:
            validate(
                metric_properties, trigger_schemas.metric_properties_schema
            )
            data["MetricProperties"] = metric_properties

        # Issue POST request to create new trigger
        resp = self._conn.post(target_uri, data=data)
        LOG.info("Node created at %s", resp.headers["Location"])
        node_url = resp.headers["Location"]

        return node_url[node_url.find(self._path):]