# Copyright (c) 2015 b<>com
#
# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
#
# 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 os
from unittest import mock


from watcher.common import utils
from watcher.decision_engine.model.collector import base
from watcher.decision_engine.model import element
from watcher.decision_engine.model import model_root as modelroot


volume_uuid_mapping = {
    "volume_0": "5028b1eb-8749-48ae-a42c-5bdd1323976f",
    "volume_1": "74454247-a064-4b34-8f43-89337987720e",
    "volume_2": "a16c811e-2521-4fd3-8779-6a94ccb3be73",
    "volume_3": "37856b95-5be4-4864-8a49-c83f55c66780",
}


class FakerModelCollector(base.BaseClusterDataModelCollector):

    def __init__(self, config=None, osc=None, audit_scope=None):
        if config is None:
            config = mock.Mock(period=777)
        super().__init__(config)

    @property
    def notification_endpoints(self):
        return []

    def load_data(self, filename):
        cwd = os.path.abspath(os.path.dirname(__file__))
        data_folder = os.path.join(cwd, "data")

        with open(os.path.join(data_folder, filename), 'rb') as xml_file:
            xml_data = xml_file.read()

        return xml_data

    def load_model(self, filename):
        return modelroot.ModelRoot.from_xml(self.load_data(filename))

    def get_audit_scope_handler(self, audit_scope):
        return None

    def execute(self):
        return self._cluster_data_model or self.build_scenario_1()

    def build_scenario_1(self):
        instances = []

        model = modelroot.ModelRoot()
        # number of nodes
        node_count = 5
        # number max of instance per node
        node_instance_count = 7
        # total number of virtual machine
        instance_count = (node_count * node_instance_count)

        for id_ in range(0, node_count):
            node_uuid = f"Node_{id_}"
            hostname = f"hostname_{id_}"
            node_attributes = {
                "id": id_,
                "uuid": node_uuid,
                "hostname": hostname,
                "memory": 132,
                "memory_mb_reserved": 0,
                "memory_ratio": 1,
                "disk": 250,
                "disk_capacity": 250,
                "disk_gb_reserved": 0,
                "disk_ratio": 1,
                "vcpus": 40,
                "vcpu_reserved": 0,
                "vcpu_ratio": 1,
            }
            node = element.ComputeNode(**node_attributes)
            model.add_node(node)

        for i in range(0, instance_count):
            instance_name = f"INSTANCE_{i}"
            instance_uuid = f"d{i:02}0ef1f-dc19-4982-9383-087498bfde03"
            if instance_name == "INSTANCE_1":
                project_id = "26F03131-32CB-4697-9D61-9123F87A8147"
            elif instance_name == "INSTANCE_2":
                project_id = "109F7909-0607-4712-B32C-5CC6D49D2F15"
            else:
                project_id = "91FFFE30-78A0-4152-ACD2-8310FF274DC9"
            instance_attributes = {
                "uuid": instance_uuid,
                "name": instance_name,
                "memory": 2,
                "disk": 20,
                "disk_capacity": 20,
                "vcpus": 10,
                "metadata":
                    '{"optimize": true,"top": "floor","nested": {"x": "y"}}',
                "project_id": project_id
            }

            instance = element.Instance(**instance_attributes)
            instances.append(instance)
            model.add_instance(instance)

        mappings = [
            ("d000ef1f-dc19-4982-9383-087498bfde03", "Node_0"),
            ("d010ef1f-dc19-4982-9383-087498bfde03", "Node_0"),
            ("d020ef1f-dc19-4982-9383-087498bfde03", "Node_1"),
            ("d030ef1f-dc19-4982-9383-087498bfde03", "Node_2"),
            ("d040ef1f-dc19-4982-9383-087498bfde03", "Node_2"),
            ("d050ef1f-dc19-4982-9383-087498bfde03", "Node_2"),
            ("d060ef1f-dc19-4982-9383-087498bfde03", "Node_3"),
            ("d070ef1f-dc19-4982-9383-087498bfde03", "Node_4"),
        ]
        for instance_uuid, node_uuid in mappings:
            model.map_instance(
                model.get_instance_by_uuid(instance_uuid),
                model.get_node_by_uuid(node_uuid),
            )

        return model

    def generate_scenario_1(self):
        return self.load_model('scenario_1.xml')

    def generate_scenario_1_with_1_node_unavailable(self):
        return self.load_model('scenario_1_with_1_node_unavailable.xml')

    def generate_scenario_1_with_all_nodes_disable(self):
        return self.load_model('scenario_1_with_all_nodes_disable.xml')

    def generate_scenario_1_with_all_instances_exclude(self):
        return self.load_model('scenario_1_with_all_instances_exclude.xml')

    def generate_scenario_3_with_2_nodes(self):
        return self.load_model('scenario_3_with_2_nodes.xml')

    def generate_scenario_4_with_1_node_no_instance(self):
        return self.load_model('scenario_4_with_1_node_no_instance.xml')

    def generate_scenario_5_with_instance_disk_0(self):
        return self.load_model('scenario_5_with_instance_disk_0.xml')

    def generate_scenario_6_with_2_nodes(self):
        return self.load_model('scenario_6_with_2_nodes.xml')

    def generate_scenario_7_with_2_nodes(self):
        return self.load_model('scenario_7_with_2_nodes.xml')

    def generate_scenario_8_with_4_nodes(self):
        return self.load_model('scenario_8_with_4_nodes.xml')

    def generate_scenario_9_with_3_active_plus_1_disabled_nodes(self):
        return self.load_model(
            'scenario_9_with_3_active_plus_1_disabled_nodes.xml')

    def generate_scenario_10(self):
        return self.load_model('scenario_10.xml')

    def generate_scenario_11_with_1_node_no_instance(self):
        return self.load_model('scenario_11_with_1_node_no_instance.xml')

    def generate_scenario_11_with_2_nodes_2_instances(self):
        return self.load_model('scenario_11_with_2_nodes_2_instances.xml')


class FakerStorageModelCollector(base.BaseClusterDataModelCollector):

    def __init__(self, config=None, osc=None, audit_scope=None):
        if config is None:
            config = mock.Mock(period=777)
        super().__init__(config)

    @property
    def notification_endpoints(self):
        return []

    def load_data(self, filename):
        cwd = os.path.abspath(os.path.dirname(__file__))
        data_folder = os.path.join(cwd, "data")

        with open(os.path.join(data_folder, filename), 'rb') as xml_file:
            xml_data = xml_file.read()

        return xml_data

    def load_model(self, filename):
        return modelroot.StorageModelRoot.from_xml(self.load_data(filename))

    def get_audit_scope_handler(self, audit_scope):
        return None

    def execute(self):
        return self._cluster_data_model or self.build_scenario_1()

    def build_scenario_1(self):

        model = modelroot.StorageModelRoot()
        # number of nodes
        node_count = 2
        # number of pools per node
        pool_count = 2
        # number of volumes
        volume_count = 9

        for i in range(0, node_count):
            host = f"host_{i}@backend_{i}"
            zone = f"zone_{i}"
            volume_type = [f"type_{i}"]
            node_attributes = {
                "host": host,
                "zone": zone,
                "status": 'enabled',
                "state": 'up',
                "volume_type": volume_type,
            }
            node = element.StorageNode(**node_attributes)
            model.add_node(node)

            for j in range(0, pool_count):
                name = f"host_{i}@backend_{i}#pool_{j}"
                pool_attributes = {
                    "name": name,
                    "total_volumes": 2,
                    "total_capacity_gb": 500,
                    "free_capacity_gb": 420,
                    "provisioned_capacity_gb": 80,
                    "allocated_capacity_gb": 80,
                    "virtual_free": 420,
                }
                pool = element.Pool(**pool_attributes)
                model.add_pool(pool)

        mappings = [
            ("host_0@backend_0#pool_0", "host_0@backend_0"),
            ("host_0@backend_0#pool_1", "host_0@backend_0"),
            ("host_1@backend_1#pool_0", "host_1@backend_1"),
            ("host_1@backend_1#pool_1", "host_1@backend_1"),
        ]

        for pool_name, node_name in mappings:
            model.map_pool(
                model.get_pool_by_pool_name(pool_name),
                model.get_node_by_name(node_name),
            )

        volume_uuid_mapping = [
            "5028b1eb-8749-48ae-a42c-5bdd1323976f",
            "74454247-a064-4b34-8f43-89337987720e",
            "a16c811e-2521-4fd3-8779-6a94ccb3be73",
            "37856b95-5be4-4864-8a49-c83f55c66780",
            "694f8fb1-df96-46be-b67d-49f2c14a495e",
            "66b094b0-8fc3-4a94-913f-a5f9312b11a5",
            "e9013810-4b4c-4b94-a056-4c36702d51a3",
            "07976191-6a57-4c35-9f3c-55b3b5ecd6d5",
            "4d1c952d-95d0-4aac-82aa-c3cb509af9f3",
        ]

        for k in range(volume_count):
            uuid = volume_uuid_mapping[k]
            name = f"name_{k}"
            volume_attributes = {
                "size": 40,
                "status": "in-use",
                "uuid": uuid,
                "attachments":
                    '[{"server_id": "server","attachment_id": "attachment"}]',
                "name": name,
                "multiattach": 'True',
                "snapshot_id": uuid,
                "project_id": "91FFFE30-78A0-4152-ACD2-8310FF274DC9",
                "metadata": '{"readonly": false,"attached_mode": "rw"}',
                "bootable": 'False'
            }
            volume = element.Volume(**volume_attributes)
            model.add_volume(volume)

        mappings = [
            (volume_uuid_mapping[0], "host_0@backend_0#pool_0"),
            (volume_uuid_mapping[1], "host_0@backend_0#pool_0"),
            (volume_uuid_mapping[2], "host_0@backend_0#pool_1"),
            (volume_uuid_mapping[3], "host_0@backend_0#pool_1"),
            (volume_uuid_mapping[4], "host_1@backend_1#pool_0"),
            (volume_uuid_mapping[5], "host_1@backend_1#pool_0"),
            (volume_uuid_mapping[6], "host_1@backend_1#pool_1"),
            (volume_uuid_mapping[7], "host_1@backend_1#pool_1"),
        ]

        for volume_uuid, pool_name in mappings:
            model.map_volume(
                model.get_volume_by_uuid(volume_uuid),
                model.get_pool_by_pool_name(pool_name),
            )

        return model

    def generate_scenario_1(self):
        return self.load_model('storage_scenario_1.xml')


class FakerBaremetalModelCollector(base.BaseClusterDataModelCollector):

    def __init__(self, config=None, osc=None):
        if config is None:
            config = mock.Mock(period=777)
        super().__init__(config)

    @property
    def notification_endpoints(self):
        return []

    def get_audit_scope_handler(self, audit_scope):
        return None

    def load_data(self, filename):
        cwd = os.path.abspath(os.path.dirname(__file__))
        data_folder = os.path.join(cwd, "data")

        with open(os.path.join(data_folder, filename), 'rb') as xml_file:
            xml_data = xml_file.read()

        return xml_data

    def load_model(self, filename):
        return modelroot.BaremetalModelRoot.from_xml(self.load_data(filename))

    def execute(self):
        return self._cluster_data_model or self.build_scenario_1()

    def build_scenario_1(self):
        model = modelroot.BaremetalModelRoot()
        # number of nodes
        node_count = 2

        for i in range(0, node_count):
            uuid = utils.generate_uuid()
            node_attributes = {
                "uuid": uuid,
                "power_state": "power on",
                "maintenance": "false",
                "maintenance_reason": "null",
                "extra": {"compute_node_id": i}
            }
            node = element.IronicNode(**node_attributes)
            model.add_node(node)

        return model

    def generate_scenario_1(self):
        return self.load_model('ironic_scenario_1.xml')


class FakerEmptyModelCollector(base.BaseClusterDataModelCollector):

    def __init__(self, config=None, osc=None):
        if config is None:
            config = mock.Mock(period=777)
        super().__init__(config)

    @property
    def notification_endpoints(self):
        return []

    def get_audit_scope_handler(self, audit_scope):
        return None

    def execute(self):
        return None
