import copy
import datetime
import json
import logging
from pathlib import Path
from urllib.parse import quote

from airavata.model.appcatalog.appdeployment.ttypes import (
    ApplicationDeploymentDescription,
    ApplicationModule,
    CommandObject,
    SetEnvPaths
)
from airavata.model.appcatalog.appinterface.ttypes import (
    ApplicationInterfaceDescription
)
from airavata.model.appcatalog.computeresource.ttypes import (
    BatchQueue,
    ComputeResourceDescription
)
from airavata.model.appcatalog.gatewayprofile.ttypes import (
    GatewayResourceProfile,
    StoragePreference
)
from airavata.model.appcatalog.groupresourceprofile.ttypes import (
    ComputeResourceReservation,
    GroupComputeResourcePreference,
    GroupResourceProfile
)
from airavata.model.appcatalog.parser.ttypes import Parser
from airavata.model.appcatalog.storageresource.ttypes import (
    StorageResourceDescription
)
from airavata.model.application.io.ttypes import (
    InputDataObjectType,
    OutputDataObjectType
)
from airavata.model.credential.store.ttypes import (
    CredentialSummary,
    SummaryType
)
from airavata.model.data.replica.ttypes import (
    DataProductModel,
    DataReplicaLocationModel
)
from airavata.model.experiment.ttypes import (
    ExperimentModel,
    ExperimentStatistics,
    ExperimentSummaryModel
)
from airavata.model.group.ttypes import GroupModel, ResourcePermissionType
from airavata.model.job.ttypes import JobModel
from airavata.model.status.ttypes import (
    ExperimentState,
    ExperimentStatus,
    ProcessStatus
)
from airavata.model.user.ttypes import UserProfile
from airavata.model.workspace.ttypes import (
    Notification,
    NotificationPriority,
    Project
)
from airavata_django_portal_sdk import (
    experiment_util,
    queue_settings_calculators,
    user_storage
)
from django.conf import settings
from django.contrib.auth import get_user_model
from django.urls import reverse
from rest_framework import serializers

from . import models, thrift_utils, view_utils

log = logging.getLogger(__name__)


class FullyEncodedHyperlinkedIdentityField(
        serializers.HyperlinkedIdentityField):
    def get_url(self, obj, view_name, request, format):
        if hasattr(obj, self.lookup_field):
            lookup_value = getattr(obj, self.lookup_field)
        else:
            lookup_value = obj.get(self.lookup_field)
        try:
            encoded_lookup_value = quote(lookup_value, safe="")
        except Exception:
            log.warning(
                "Failed to encode lookup_value [{}] for lookup_field "
                "[{}] of object [{}]".format(
                    lookup_value, self.lookup_field, obj))
            raise
        # Bit of a hack. Django's URL reversing does URL encoding but it
        # doesn't encode all characters including some like '/' that are used
        # in URL mappings.
        kwargs = {self.lookup_url_kwarg: "__PLACEHOLDER__"}
        url = self.reverse(view_name, kwargs=kwargs,
                           request=request, format=format)
        return url.replace("__PLACEHOLDER__", encoded_lookup_value)


class UTCPosixTimestampDateTimeField(serializers.DateTimeField):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.default = self.current_time_ms
        self.initial = self.initial_value
        self.required = False

    def to_representation(self, obj):
        # Create datetime instance from milliseconds that is aware of timezon
        dt = datetime.datetime.fromtimestamp(obj / 1000, datetime.timezone.utc)
        return super().to_representation(dt)

    def to_internal_value(self, data):
        dt = super().to_internal_value(data)
        return int(dt.timestamp() * 1000)

    def initial_value(self):
        return self.to_representation(self.current_time_ms())

    def current_time_ms(self):
        return int(datetime.datetime.utcnow().timestamp() * 1000)


class StoredJSONField(serializers.JSONField):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def to_representation(self, value):
        try:
            if value:
                return json.loads(value)
            else:
                return value
        except Exception:
            return value

    def to_internal_value(self, data):
        try:
            return json.dumps(data)
        except (TypeError, ValueError):
            self.fail('invalid')


class OrderedListField(serializers.ListField):

    def __init__(self, *args, **kwargs):
        self.order_by = kwargs.pop('order_by', None)
        super().__init__(*args, **kwargs)

    def to_representation(self, instance):
        rep = super().to_representation(instance)
        if rep is not None:
            rep.sort(key=lambda item: item[self.order_by])
        return rep

    def to_internal_value(self, data):
        validated_data = super().to_internal_value(data)
        # Update order field based on order in array
        items = validated_data if validated_data else []
        for i in range(len(items)):
            items[i][self.order_by] = i
        return validated_data


class GroupSerializer(thrift_utils.create_serializer_class(GroupModel)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:group-detail',
        lookup_field='id',
        lookup_url_kwarg='group_id')
    isAdmin = serializers.SerializerMethodField()
    isOwner = serializers.SerializerMethodField()
    isMember = serializers.SerializerMethodField()
    isGatewayAdminsGroup = serializers.SerializerMethodField()
    isReadOnlyGatewayAdminsGroup = serializers.SerializerMethodField()
    isDefaultGatewayUsersGroup = serializers.SerializerMethodField()

    class Meta:
        required = ('name',)
        read_only = ('ownerId',)

    def create(self, validated_data):
        group = super().create(validated_data)
        group.ownerId = self.context['request'].user.username + \
            "@" + settings.GATEWAY_ID
        return group

    def update(self, instance, validated_data):
        instance.name = validated_data.get('name', instance.name)
        instance.description = validated_data.get(
            'description', instance.description)
        # Calculate added and removed members
        old_members = set(instance.members)
        new_members = set(validated_data.get('members', instance.members))
        removed_members = old_members - new_members
        added_members = new_members - old_members
        instance._removed_members = list(removed_members)
        instance._added_members = list(added_members)
        instance.members = validated_data.get('members', instance.members)
        # Calculate added and removed admins
        old_admins = set(instance.admins)
        new_admins = set(validated_data.get('admins', instance.admins))
        removed_admins = old_admins - new_admins
        added_admins = new_admins - old_admins
        instance._removed_admins = list(removed_admins)
        instance._added_admins = list(added_admins)
        instance.admins = validated_data.get('admins', instance.admins)
        # Add new admins that aren't members to the added_members list
        instance._added_members.extend(list(added_admins - new_members))
        instance.members.extend(list(added_admins - new_members))
        return instance

    def get_isAdmin(self, group):
        request = self.context['request']
        return request.profile_service['group_manager'].hasAdminAccess(
            request.authz_token,
            group.id,
            request.user.username + "@" + settings.GATEWAY_ID)

    def get_isOwner(self, group):
        request = self.context['request']
        return group.ownerId == (request.user.username +
                                 "@" +
                                 settings.GATEWAY_ID)

    def get_isMember(self, group):
        request = self.context['request']
        username = request.user.username + "@" + settings.GATEWAY_ID
        return group.members and username in group.members

    def get_isGatewayAdminsGroup(self, group):
        return group.id == self._gateway_groups()['adminsGroupId']

    def get_isReadOnlyGatewayAdminsGroup(self, group):
        return group.id == self._gateway_groups()['readOnlyAdminsGroupId']

    def get_isDefaultGatewayUsersGroup(self, group):
        return group.id == self._gateway_groups()['defaultGatewayUsersGroupId']

    def _gateway_groups(self):
        request = self.context['request']
        # gateway_groups_middleware sets this session variable
        if 'GATEWAY_GROUPS' in request.session:
            return request.session['GATEWAY_GROUPS']
        else:
            gateway_groups = request.airavata_client.getGatewayGroups(
                request.authz_token)
            return copy.deepcopy(gateway_groups.__dict__)


class ProjectSerializer(
        thrift_utils.create_serializer_class(Project)):
    class Meta:
        required = ('name',)
        read_only = ('owner', 'gatewayId')

    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:project-detail',
        lookup_field='projectID',
        lookup_url_kwarg='project_id')
    experiments = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:project-experiments',
        lookup_field='projectID',
        lookup_url_kwarg='project_id')
    creationTime = UTCPosixTimestampDateTimeField(allow_null=True)
    userHasWriteAccess = serializers.SerializerMethodField()
    isOwner = serializers.SerializerMethodField()

    def create(self, validated_data):
        return Project(**validated_data)

    def update(self, instance, validated_data):
        instance.name = validated_data.get('name', instance.name)
        instance.description = validated_data.get(
            'description', instance.description)
        return instance

    def get_userHasWriteAccess(self, project):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, project.projectID,
            ResourcePermissionType.WRITE)

    def get_isOwner(self, project):
        request = self.context['request']
        return project.owner == request.user.username


class ApplicationModuleSerializer(
        thrift_utils.create_serializer_class(ApplicationModule)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-detail',
        lookup_field='appModuleId',
        lookup_url_kwarg='app_module_id')
    applicationInterface = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-application-interface',
        lookup_field='appModuleId',
        lookup_url_kwarg='app_module_id')
    applicationDeployments = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-application-deployments',
        lookup_field='appModuleId',
        lookup_url_kwarg='app_module_id')
    userHasWriteAccess = serializers.SerializerMethodField()

    class Meta:
        required = ('appModuleName',)

    def get_userHasWriteAccess(self, appDeployment):
        request = self.context['request']
        return request.is_gateway_admin


class InputDataObjectTypeSerializer(
        thrift_utils.create_serializer_class(InputDataObjectType)):
    metaData = StoredJSONField(required=False, allow_null=True)

    class Meta:
        required = ('name',)


class OutputDataObjectTypeSerializer(
        thrift_utils.create_serializer_class(OutputDataObjectType)):
    metaData = StoredJSONField(required=False, allow_null=True)

    class Meta:
        required = ('name',)


class ApplicationInterfaceDescriptionSerializer(
        thrift_utils.create_serializer_class(ApplicationInterfaceDescription)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-interface-detail',
        lookup_field='applicationInterfaceId',
        lookup_url_kwarg='app_interface_id')
    applicationInputs = OrderedListField(
        order_by='inputOrder',
        child=InputDataObjectTypeSerializer(),
        allow_null=True)
    applicationOutputs = OutputDataObjectTypeSerializer(many=True)
    userHasWriteAccess = serializers.SerializerMethodField()
    showQueueSettings = serializers.BooleanField(required=False)
    queueSettingsCalculatorId = serializers.CharField(allow_null=True, required=False)

    def to_representation(self, instance):
        representation = super().to_representation(instance)
        application_module_id = instance.applicationModules[0]
        application_settings, created = models.ApplicationSettings.objects.get_or_create(
            application_module_id=application_module_id)
        representation["showQueueSettings"] = application_settings.show_queue_settings
        # check that queue_settings_calculator_id exists
        if queue_settings_calculators.exists(application_settings.queue_settings_calculator_id):
            representation["queueSettingsCalculatorId"] = application_settings.queue_settings_calculator_id
        return representation

    def create(self, validated_data):
        showQueueSettings = validated_data.pop("showQueueSettings", True)
        queueSettingsCalculatorId = validated_data.pop("queueSettingsCalculatorId", None)
        application_interface = super().create(validated_data)
        application_module_id = application_interface.applicationModules[0]
        models.ApplicationSettings.objects.update_or_create(
            application_module_id=application_module_id,
            defaults={"show_queue_settings": showQueueSettings,
                      "queue_settings_calculator_id": queueSettingsCalculatorId}
        )
        return application_interface

    def update(self, instance, validated_data):
        defaults = {}
        if "showQueueSettings" in validated_data:
            defaults["show_queue_settings"] = validated_data.pop("showQueueSettings")
        if "queueSettingsCalculatorId" in validated_data:
            defaults["queue_settings_calculator_id"] = validated_data.pop("queueSettingsCalculatorId")
        application_interface = super().update(instance, validated_data)
        application_module_id = application_interface.applicationModules[0]
        models.ApplicationSettings.objects.update_or_create(
            application_module_id=application_module_id, defaults=defaults
        )
        return application_interface

    def get_userHasWriteAccess(self, appDeployment):
        request = self.context['request']
        return request.is_gateway_admin


class CommandObjectSerializer(
        thrift_utils.create_serializer_class(CommandObject)):
    pass


class SetEnvPathsSerializer(
        thrift_utils.create_serializer_class(SetEnvPaths)):
    pass


class ApplicationDeploymentDescriptionSerializer(
    thrift_utils.create_serializer_class(
        ApplicationDeploymentDescription)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-deployment-detail',
        lookup_field='appDeploymentId',
        lookup_url_kwarg='app_deployment_id')
    # Default values returned in these results have been overridden with app
    # deployment defaults for any that exist
    queues = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:application-deployment-queues',
        lookup_field='appDeploymentId',
        lookup_url_kwarg='app_deployment_id')
    userHasWriteAccess = serializers.SerializerMethodField()
    moduleLoadCmds = OrderedListField(
        order_by='commandOrder',
        child=CommandObjectSerializer(),
        allow_null=True)
    preJobCommands = OrderedListField(
        order_by='commandOrder',
        child=CommandObjectSerializer(),
        allow_null=True)
    postJobCommands = OrderedListField(
        order_by='commandOrder',
        child=CommandObjectSerializer(),
        allow_null=True)
    libPrependPaths = OrderedListField(
        order_by='envPathOrder',
        child=SetEnvPathsSerializer(),
        allow_null=True)
    libAppendPaths = OrderedListField(
        order_by='envPathOrder',
        child=SetEnvPathsSerializer(),
        allow_null=True)
    setEnvironment = OrderedListField(
        order_by='envPathOrder',
        child=SetEnvPathsSerializer(),
        allow_null=True)

    def get_userHasWriteAccess(self, appDeployment):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, appDeployment.appDeploymentId,
            ResourcePermissionType.WRITE)


class ComputeResourceDescriptionSerializer(
        thrift_utils.create_serializer_class(ComputeResourceDescription)):
    pass


class BatchQueueSerializer(thrift_utils.create_serializer_class(BatchQueue)):
    pass


class ExperimentStatusSerializer(
        thrift_utils.create_serializer_class(ExperimentStatus)):
    timeOfStateChange = UTCPosixTimestampDateTimeField()


class ProcessStatusSerializer(
        thrift_utils.create_serializer_class(ProcessStatus)):
    timeOfStateChange = UTCPosixTimestampDateTimeField()


class ExperimentSerializer(
        thrift_utils.create_serializer_class(ExperimentModel)):
    class Meta:
        required = ('projectId', 'experimentType', 'experimentName')
        read_only = ('userName', 'gatewayId')

    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:experiment-detail',
        lookup_field='experimentId',
        lookup_url_kwarg='experiment_id')
    full_experiment = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:full-experiment-detail',
        lookup_field='experimentId',
        lookup_url_kwarg='experiment_id')
    project = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:project-detail',
        lookup_field='projectId',
        lookup_url_kwarg='project_id')
    jobs = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:experiment-jobs',
        lookup_field='experimentId',
        lookup_url_kwarg='experiment_id')
    shared_entity = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:shared-entity-detail',
        lookup_field='experimentId',
        lookup_url_kwarg='entity_id')
    experimentInputs = OrderedListField(
        order_by='inputOrder',
        child=InputDataObjectTypeSerializer(),
        allow_null=True)
    experimentOutputs = serializers.ListField(
        child=OutputDataObjectTypeSerializer(),
        allow_null=True)
    creationTime = UTCPosixTimestampDateTimeField(allow_null=True)
    experimentStatus = ExperimentStatusSerializer(many=True, allow_null=True)
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, experiment):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, experiment.experimentId,
            ResourcePermissionType.WRITE)

    def to_representation(self, experiment):
        result = super().to_representation(experiment)
        self._add_intermediate_output_information(experiment, result)
        return result

    def _add_intermediate_output_information(self, experiment, representation):
        request = self.context['request']

        # If experiment is EXECUTING, add intermediateOutput information to
        # experiment outputs
        if (experiment.experimentStatus and
                experiment.experimentStatus[-1].state == ExperimentState.EXECUTING):
            for output in representation["experimentOutputs"]:
                output["intermediateOutput"] = {"processStatus": None}
                try:
                    can_fetch = experiment_util.intermediate_output.can_fetch_intermediate_output(request, experiment, output["name"])
                    output["intermediateOutput"]["canFetch"] = can_fetch
                    process_status = experiment_util.intermediate_output.get_intermediate_output_process_status(
                        request, experiment, output["name"])
                    if process_status:
                        serializer = ProcessStatusSerializer(
                            process_status, context={'request': request})
                        output["intermediateOutput"]["processStatus"] = serializer.data
                    data_products = experiment_util.intermediate_output.get_intermediate_output_data_products(
                        request, experiment=experiment, output_name=output["name"])
                    data_product_serializer = DataProductSerializer(
                        data_products, context={'request': request}, many=True)
                    output["intermediateOutput"]["dataProducts"] = data_product_serializer.data
                except Exception:
                    log.debug("Failed to get intermediate output status", exc_info=True)


class DataReplicaLocationSerializer(
        thrift_utils.create_serializer_class(DataReplicaLocationModel)):
    creationTime = UTCPosixTimestampDateTimeField()
    lastModifiedTime = UTCPosixTimestampDateTimeField()


class DataProductSerializer(
        thrift_utils.create_serializer_class(DataProductModel)):
    creationTime = UTCPosixTimestampDateTimeField()
    modifiedTime = UTCPosixTimestampDateTimeField()
    lastModifiedTime = UTCPosixTimestampDateTimeField()
    replicaLocations = DataReplicaLocationSerializer(many=True)
    downloadURL = serializers.SerializerMethodField()
    isInputFileUpload = serializers.SerializerMethodField()
    filesize = serializers.SerializerMethodField()
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_downloadURL(self, data_product):
        """Getter for downloadURL field. Returns None if file is not available."""
        request = self.context['request']
        if user_storage.exists(request, data_product):
            return user_storage.get_lazy_download_url(request, data_product)
        else:
            return None

    def get_isInputFileUpload(self, data_product):
        """Return True if this is an uploaded input file."""
        request = self.context['request']
        return user_storage.is_input_file(request, data_product)

    def get_filesize(self, data_product):
        request = self.context['request']
        # For backwards compatibility with older user_storage, can be eventually removed
        if hasattr(user_storage, 'get_data_product_metadata') and user_storage.exists(request, data_product):
            metadata = user_storage.get_data_product_metadata(request, data_product)
            return metadata['size']
        else:
            return 0

    def get_userHasWriteAccess(self, data_product: DataProductModel):
        request = self.context['request']
        file_metadata = user_storage.get_data_product_metadata(request, data_product=data_product)
        if "userHasWriteAccess" in file_metadata:
            return file_metadata["userHasWriteAccess"]
        else:
            path = file_metadata["path"]
            shared_path = view_utils.is_shared_path(path)
            if shared_path:
                # Only admins can edit files/directories in a shared directory
                return request.is_gateway_admin
            return True


# TODO move this into airavata_sdk?
class FullExperiment:
    """Experiment with referenced data models."""

    def __init__(self, experimentModel, project=None, outputDataProducts=None,
                 inputDataProducts=None, applicationModule=None,
                 computeResource=None, jobDetails=None, outputViews=None):
        self.experiment = experimentModel
        self.experimentId = experimentModel.experimentId
        self.project = project
        self.outputDataProducts = outputDataProducts
        self.inputDataProducts = inputDataProducts
        self.applicationModule = applicationModule
        self.computeResource = computeResource
        self.jobDetails = jobDetails
        self.outputViews = outputViews


class JobSerializer(thrift_utils.create_serializer_class(JobModel)):
    creationTime = UTCPosixTimestampDateTimeField()


class FullExperimentSerializer(serializers.Serializer):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:full-experiment-detail',
        lookup_field='experimentId',
        lookup_url_kwarg='experiment_id')
    experiment = ExperimentSerializer()
    experimentId = serializers.CharField(read_only=True)
    outputDataProducts = DataProductSerializer(many=True, read_only=True)
    inputDataProducts = DataProductSerializer(many=True, read_only=True)
    applicationModule = ApplicationModuleSerializer(read_only=True)
    computeResource = ComputeResourceDescriptionSerializer(read_only=True)
    project = ProjectSerializer(read_only=True)
    jobDetails = JobSerializer(many=True, read_only=True)
    outputViews = serializers.DictField(read_only=True)

    def create(self, validated_data):
        raise Exception("Not implemented")

    def update(self, instance, validated_data):
        raise Exception("Not implemented")


class BaseExperimentSummarySerializer(
        thrift_utils.create_serializer_class(ExperimentSummaryModel)):
    creationTime = UTCPosixTimestampDateTimeField()
    statusUpdateTime = UTCPosixTimestampDateTimeField()
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:experiment-detail',
        lookup_field='experimentId',
        lookup_url_kwarg='experiment_id')
    project = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:project-detail',
        lookup_field='projectId',
        lookup_url_kwarg='project_id')


class ExperimentSummarySerializer(BaseExperimentSummarySerializer):
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, experiment):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, experiment.experimentId,
            ResourcePermissionType.WRITE)


class UserProfileSerializer(
        thrift_utils.create_serializer_class(UserProfile)):
    creationTime = UTCPosixTimestampDateTimeField()
    lastAccessTime = UTCPosixTimestampDateTimeField()


class ComputeResourceReservationSerializer(
        thrift_utils.create_serializer_class(ComputeResourceReservation)):
    startTime = UTCPosixTimestampDateTimeField(allow_null=True)
    endTime = UTCPosixTimestampDateTimeField(allow_null=True)


class GroupComputeResourcePreferenceSerializer(
        thrift_utils.create_serializer_class(GroupComputeResourcePreference)):
    reservations = ComputeResourceReservationSerializer(many=True)


class GroupResourceProfileSerializer(
        thrift_utils.create_serializer_class(GroupResourceProfile)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:group-resource-profile-detail',
        lookup_field='groupResourceProfileId',
        lookup_url_kwarg='group_resource_profile_id')
    creationTime = UTCPosixTimestampDateTimeField(allow_null=True)
    updatedTime = UTCPosixTimestampDateTimeField(allow_null=True)
    userHasWriteAccess = serializers.SerializerMethodField()
    computePreferences = GroupComputeResourcePreferenceSerializer(many=True)

    class Meta:
        required = ('groupResourceProfileName',)

    def update(self, instance, validated_data):
        result = super().update(instance, validated_data)
        result._removed_compute_resource_preferences = []
        result._removed_compute_resource_policies = []
        result._removed_batch_queue_resource_policies = []
        # Find all compute resource preferences that were removed
        for compute_resource_preference in instance.computePreferences:
            existing_compute_resource_preference = next(
                (pref for pref in result.computePreferences
                 if pref.computeResourceId ==
                 compute_resource_preference.computeResourceId),
                None)
            if not existing_compute_resource_preference:
                result._removed_compute_resource_preferences.append(
                    compute_resource_preference)
        # Find all compute resource policies that were removed
        for compute_resource_policy in instance.computeResourcePolicies:
            existing_compute_resource_policy = next(
                (pol for pol in result.computeResourcePolicies
                 if pol.resourcePolicyId ==
                 compute_resource_policy.resourcePolicyId),
                None)
            if not existing_compute_resource_policy:
                result._removed_compute_resource_policies.append(
                    compute_resource_policy)
        # Find all batch queue resource policies that were removed
        for batch_queue_resource_policy in instance.batchQueueResourcePolicies:
            existing_batch_queue_resource_policy_for_update = next(
                (bq for bq in result.batchQueueResourcePolicies
                 if bq.resourcePolicyId ==
                 batch_queue_resource_policy.resourcePolicyId),
                None)
            if not existing_batch_queue_resource_policy_for_update:
                result._removed_batch_queue_resource_policies.append(
                    batch_queue_resource_policy)
        return result

    def get_userHasWriteAccess(self, groupResourceProfile):
        request = self.context['request']
        write_access = request.airavata_client.userHasAccess(
            request.authz_token, groupResourceProfile.groupResourceProfileId,
            ResourcePermissionType.WRITE)
        if not write_access:
            return False
        # Check that user has READ access to all tokens in this
        # GroupResourceProfile
        tokens = set([groupResourceProfile.defaultCredentialStoreToken] +
                     [cp.resourceSpecificCredentialStoreToken
                      for cp in groupResourceProfile.computePreferences])

        def check_token(token):
            return token is None or request.airavata_client.userHasAccess(
                request.authz_token, token, ResourcePermissionType.READ)

        return all(map(check_token, tokens))


class UserPermissionSerializer(serializers.Serializer):
    user = UserProfileSerializer()
    permissionType = serializers.IntegerField()


class GroupPermissionSerializer(serializers.Serializer):
    group = GroupSerializer()
    permissionType = serializers.IntegerField()


class SharedEntitySerializer(serializers.Serializer):
    entityId = serializers.CharField(read_only=True)
    userPermissions = UserPermissionSerializer(many=True)
    groupPermissions = GroupPermissionSerializer(many=True)
    owner = UserProfileSerializer(read_only=True)
    isOwner = serializers.SerializerMethodField()
    hasSharingPermission = serializers.SerializerMethodField()

    def create(self, validated_data):
        raise Exception("Not implemented")

    def update(self, instance, validated_data):
        # Compute lists of ids to grant/revoke READ/WRITE/MANAGE_SHARING
        # permission
        existing_user_permissions = {
            user['user'].airavataInternalUserId: user['permissionType']
            for user in instance['userPermissions']}
        new_user_permissions = {
            user['user']['airavataInternalUserId']:
                user['permissionType']
            for user in validated_data['userPermissions']}

        (
            user_grant_read_permission,
            user_grant_write_permission,
            user_grant_manage_sharing_permission,
            user_revoke_read_permission,
            user_revoke_write_permission,
            user_revoke_manage_sharing_permission) = self._compute_all_revokes_and_grants(
            existing_user_permissions,
            new_user_permissions)

        existing_group_permissions = {
            group['group'].id: group['permissionType']
            for group in instance['groupPermissions']}
        new_group_permissions = {
            group['group']['id']: group['permissionType']
            for group in validated_data['groupPermissions']}

        (
            group_grant_read_permission,
            group_grant_write_permission,
            group_grant_manage_sharing_permission,
            group_revoke_read_permission,
            group_revoke_write_permission,
            group_revoke_manage_sharing_permission) = self._compute_all_revokes_and_grants(
            existing_group_permissions,
            new_group_permissions)

        instance['_user_grant_read_permission'] = user_grant_read_permission
        instance['_user_grant_write_permission'] = user_grant_write_permission
        instance['_user_grant_manage_sharing_permission'] = user_grant_manage_sharing_permission
        instance['_user_revoke_read_permission'] = user_revoke_read_permission
        instance['_user_revoke_write_permission'] = user_revoke_write_permission
        instance['_user_revoke_manage_sharing_permission'] = user_revoke_manage_sharing_permission
        instance['_group_grant_read_permission'] = group_grant_read_permission
        instance['_group_grant_write_permission'] = group_grant_write_permission
        instance['_group_grant_manage_sharing_permission'] = group_grant_manage_sharing_permission
        instance['_group_revoke_read_permission'] = group_revoke_read_permission
        instance['_group_revoke_write_permission'] = group_revoke_write_permission
        instance['_group_revoke_manage_sharing_permission'] = group_revoke_manage_sharing_permission
        instance['userPermissions'] = [
            {'user': UserProfile(**data['user']),
             'permissionType': data['permissionType']}
            for data in validated_data.get(
                'userPermissions', instance['userPermissions'])]
        instance['groupPermissions'] = [
            {'group': GroupModel(**data['group']),
             'permissionType': data['permissionType']}
            for data in validated_data.get('groupPermissions', instance['groupPermissions'])]
        return instance

    def _compute_all_revokes_and_grants(self, existing_permissions,
                                        new_permissions):
        grant_read_permission = []
        grant_write_permission = []
        grant_manage_sharing_permission = []
        revoke_read_permission = []
        revoke_write_permission = []
        revoke_manage_sharing_permission = []
        # Union the two sets of user/group ids
        all_ids = existing_permissions.keys() | new_permissions.keys()
        for id in all_ids:
            revokes, grants = self._compute_revokes_and_grants(
                existing_permissions.get(id),
                new_permissions.get(id)
            )
            if ResourcePermissionType.READ in revokes:
                revoke_read_permission.append(id)
            if ResourcePermissionType.WRITE in revokes:
                revoke_write_permission.append(id)
            if ResourcePermissionType.MANAGE_SHARING in revokes:
                revoke_manage_sharing_permission.append(id)
            if ResourcePermissionType.READ in grants:
                grant_read_permission.append(id)
            if ResourcePermissionType.WRITE in grants:
                grant_write_permission.append(id)
            if ResourcePermissionType.MANAGE_SHARING in grants:
                grant_manage_sharing_permission.append(id)
        return (
            grant_read_permission,
            grant_write_permission,
            grant_manage_sharing_permission,
            revoke_read_permission,
            revoke_write_permission,
            revoke_manage_sharing_permission)

    def _compute_revokes_and_grants(self, current_permission=None,
                                    new_permission=None):
        read_permissions = set((ResourcePermissionType.READ,))
        write_permissions = set((ResourcePermissionType.READ,
                                 ResourcePermissionType.WRITE))
        manage_share_permissions = set(
            (ResourcePermissionType.READ,
             ResourcePermissionType.WRITE,
             ResourcePermissionType.MANAGE_SHARING))
        current_permissions_set = set()
        new_permissions_set = set()
        if current_permission == ResourcePermissionType.READ:
            current_permissions_set = read_permissions
        elif current_permission == ResourcePermissionType.WRITE:
            current_permissions_set = write_permissions
        elif current_permission == ResourcePermissionType.MANAGE_SHARING:
            current_permissions_set = manage_share_permissions
        if new_permission == ResourcePermissionType.READ:
            new_permissions_set = read_permissions
        elif new_permission == ResourcePermissionType.WRITE:
            new_permissions_set = write_permissions
        elif new_permission == ResourcePermissionType.MANAGE_SHARING:
            new_permissions_set = manage_share_permissions

        # return tuple: permissions to revoke and permissions to grant
        return (current_permissions_set - new_permissions_set,
                new_permissions_set - current_permissions_set)

    def get_isOwner(self, shared_entity):
        request = self.context['request']
        return shared_entity['owner'].userId == request.user.username

    def get_hasSharingPermission(self, shared_entity):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, shared_entity['entityId'],
            ResourcePermissionType.MANAGE_SHARING)


class CredentialSummarySerializer(
        thrift_utils.create_serializer_class(CredentialSummary)):
    type = thrift_utils.ThriftEnumField(SummaryType)
    persistedTime = UTCPosixTimestampDateTimeField()
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, credential_summary):
        request = self.context['request']
        return request.airavata_client.userHasAccess(
            request.authz_token, credential_summary.token,
            ResourcePermissionType.WRITE)


class StoragePreferenceSerializer(
        thrift_utils.create_serializer_class(StoragePreference)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:storage-preference-detail',
        lookup_field='storageResourceId',
        lookup_url_kwarg='storage_resource_id')

    def to_representation(self, instance):
        ret = super().to_representation(instance)
        # Convert empty string to null
        if ret['resourceSpecificCredentialStoreToken'] == '':
            ret['resourceSpecificCredentialStoreToken'] = None
        return ret


class GatewayResourceProfileSerializer(
        thrift_utils.create_serializer_class(GatewayResourceProfile)):
    storagePreferences = StoragePreferenceSerializer(many=True)
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, gatewayResourceProfile):
        request = self.context['request']
        return request.is_gateway_admin


class StorageResourceSerializer(
        thrift_utils.create_serializer_class(StorageResourceDescription)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:storage-resource-detail',
        lookup_field='storageResourceId',
        lookup_url_kwarg='storage_resource_id')
    creationTime = UTCPosixTimestampDateTimeField()
    updateTime = UTCPosixTimestampDateTimeField()


class ParserSerializer(thrift_utils.create_serializer_class(Parser)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:parser-detail',
        lookup_field='id',
        lookup_url_kwarg='parser_id')


class UserHasWriteAccessToPathSerializer(serializers.Serializer):
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, instance):
        request = self.context['request']
        # Special handling when using remote API to access user data storage
        if hasattr(settings, 'GATEWAY_DATA_STORE_REMOTE_API'):
            if "userHasWriteAccess" in instance:
                return instance["userHasWriteAccess"]
            elif instance.get("isDir", False):
                path = Path(instance.get("path", ""))
                if path != Path(""):
                    # get parent directory listing and use that to figure out if
                    # there is write access to this directory
                    directories, _ = user_storage.listdir(request, path.parent)
                    for d in directories:
                        if Path(d["path"]) == path:
                            return d.get("userHasWriteAccess", False)
                    return False
                else:
                    # User always has write access on home directory
                    return True
            else:
                return False

        is_shared_path = view_utils.is_shared_path(instance["path"])
        if is_shared_path:
            return request.is_gateway_admin
        else:
            return True


class UserStorageFileSerializer(UserHasWriteAccessToPathSerializer):
    name = serializers.CharField()
    downloadURL = serializers.SerializerMethodField()
    dataProductURI = serializers.CharField(source='data-product-uri')
    createdTime = serializers.DateTimeField(source='created_time')
    modifiedTime = serializers.DateTimeField(source='modified_time')
    mimeType = serializers.CharField(source='mime_type')
    size = serializers.IntegerField()
    hidden = serializers.BooleanField()

    def get_downloadURL(self, file):
        """Getter for downloadURL field."""
        request = self.context['request']
        return user_storage.get_lazy_download_url(request, data_product_uri=file['data-product-uri'])


class UserStorageDirectorySerializer(UserHasWriteAccessToPathSerializer):
    name = serializers.CharField()
    path = serializers.CharField()
    createdTime = serializers.DateTimeField(source='created_time')
    modifiedTime = serializers.DateTimeField(source='modified_time')
    size = serializers.IntegerField()
    hidden = serializers.BooleanField()
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:user-storage-items',
        lookup_field='path',
        lookup_url_kwarg='path')
    isSharedDir = serializers.SerializerMethodField()

    def get_isSharedDir(self, directory):
        if "isSharedDir" in directory:
            return directory["isSharedDir"]
        return view_utils.is_shared_dir(directory["path"])


class UserStoragePathSerializer(UserHasWriteAccessToPathSerializer):
    isDir = serializers.BooleanField()
    directories = UserStorageDirectorySerializer(many=True)
    files = UserStorageFileSerializer(many=True)
    parts = serializers.ListField(child=serializers.CharField())
    path = serializers.CharField(required=False)
    # uploaded is populated after a file upload
    uploaded = DataProductSerializer(read_only=True)


# Fields for ExperimentStorageFileSerializer are the same as UserStorageFileSerializer
ExperimentStorageFileSerializer = UserStorageFileSerializer


class ExperimentStorageDirectorySerializer(serializers.Serializer):
    name = serializers.CharField()
    path = serializers.CharField()
    createdTime = serializers.DateTimeField(source='created_time')
    modifiedTime = serializers.DateTimeField(source='modified_time')
    size = serializers.IntegerField()
    url = serializers.SerializerMethodField()

    def get_url(self, dir):

        request = self.context['request']
        return request.build_absolute_uri(
            reverse("django_airavata_api:experiment-storage-items", kwargs={
                "experiment_id": dir['experiment_id'],
                "path": dir['path']
            }))


class ExperimentStoragePathSerializer(serializers.Serializer):
    isDir = serializers.BooleanField()
    directories = ExperimentStorageDirectorySerializer(many=True)
    files = ExperimentStorageFileSerializer(many=True)
    parts = serializers.ListField(child=serializers.CharField())


# ModelSerializers
class ApplicationPreferencesSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.ApplicationPreferences
        exclude = ('id', 'username', 'workspace_preferences')


class WorkspacePreferencesSerializer(serializers.ModelSerializer):
    application_preferences = ApplicationPreferencesSerializer(
        source="applicationpreferences_set", many=True)

    class Meta:
        model = models.WorkspacePreferences
        exclude = ('username',)


class IAMUserProfile(serializers.Serializer):
    airavataInternalUserId = serializers.CharField()
    userId = serializers.CharField()
    gatewayId = serializers.CharField()
    email = serializers.CharField()
    firstName = serializers.CharField()
    lastName = serializers.CharField()
    enabled = serializers.BooleanField()
    emailVerified = serializers.BooleanField()
    airavataUserProfileExists = serializers.BooleanField()
    creationTime = UTCPosixTimestampDateTimeField()
    groups = GroupSerializer(many=True)
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:iam-user-profile-detail',
        lookup_field='userId',
        lookup_url_kwarg='user_id')
    userHasWriteAccess = serializers.SerializerMethodField()
    newUsername = serializers.CharField(write_only=True, required=False)
    externalIDPUserInfo = serializers.SerializerMethodField()
    userProfileInvalidFields = serializers.SerializerMethodField()

    def update(self, instance, validated_data):
        existing_group_ids = [group.id for group in instance['groups']]
        new_group_ids = [group['id'] for group in validated_data['groups']]
        instance['_added_group_ids'] = list(
            set(new_group_ids) - set(existing_group_ids))
        instance['_removed_group_ids'] = list(
            set(existing_group_ids) - set(new_group_ids))
        return instance

    def get_userHasWriteAccess(self, userProfile):
        request = self.context['request']
        return request.is_gateway_admin

    def get_externalIDPUserInfo(self, userProfile):
        result = {}
        try:
            if get_user_model().objects.filter(username=userProfile['userId']).exists():
                django_user = get_user_model().objects.get(username=userProfile['userId'])
                claims = django_user.user_profile.idp_userinfo.all()
                if claims.exists():
                    result['idp_alias'] = claims.first().idp_alias
                    result['userinfo'] = {}
                for claim in claims:
                    result['userinfo'][claim.claim] = claim.value
        except Exception as e:
            log.warning(f"Failed to load idp_userinfo for {userProfile['userId']}", exc_info=e)
        return result

    def get_userProfileInvalidFields(self, userProfile):
        try:
            User = get_user_model()
            if User.objects.filter(username=userProfile['userId']).exists():
                django_user = User.objects.get(username=userProfile['userId'])
                if hasattr(django_user, 'user_profile'):
                    return django_user.user_profile.invalid_fields
                else:
                    # For backwards compatibility, return True if no user_profile
                    return []
        except Exception as e:
            log.warning(f"Failed to get user_profile.invalid_fields for {userProfile['userId']}", exc_info=e)
        return []


class AckNotificationSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.User_Notifications


class NotificationSerializer(thrift_utils.create_serializer_class(Notification)):
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:manage-notifications-detail',
        lookup_field='notificationId',
        lookup_url_kwarg='notification_id')
    priority = thrift_utils.ThriftEnumField(NotificationPriority)
    creationTime = UTCPosixTimestampDateTimeField(allow_null=True)
    publishedTime = UTCPosixTimestampDateTimeField()
    expirationTime = UTCPosixTimestampDateTimeField()
    userHasWriteAccess = serializers.SerializerMethodField()
    showInDashboard = serializers.BooleanField(default=False)

    def get_userHasWriteAccess(self, userProfile):
        request = self.context['request']
        return request.is_gateway_admin

    def validate(self, attrs):
        del attrs["showInDashboard"]

        return attrs

    def to_representation(self, notification):
        notification_extension_list = models.NotificationExtension.objects.filter(
            notification_id=notification.notificationId)
        setattr(notification, "showInDashboard",
                False if len(notification_extension_list) == 0 else notification_extension_list[0].showInDashboard)

        return super().to_representation(notification)

    def update_notification_extension(self, request, notification):
        if "showInDashboard" in request.data:
            existing_entries = models.NotificationExtension.objects.filter(notification_id=notification.notificationId)

            if len(existing_entries) > 0:
                existing_entries.update(
                    showInDashboard=request.data["showInDashboard"]
                )
            else:
                models.NotificationExtension.objects.create(
                    notification_id=notification.notificationId,
                    showInDashboard=request.data["showInDashboard"]
                )


class ExperimentStatisticsSerializer(
        thrift_utils.create_serializer_class(ExperimentStatistics)):
    allExperiments = BaseExperimentSummarySerializer(many=True)
    completedExperiments = BaseExperimentSummarySerializer(many=True)
    failedExperiments = BaseExperimentSummarySerializer(many=True)
    cancelledExperiments = BaseExperimentSummarySerializer(many=True)
    createdExperiments = BaseExperimentSummarySerializer(many=True)
    runningExperiments = BaseExperimentSummarySerializer(many=True)


class UnverifiedEmailUserProfile(serializers.Serializer):
    userId = serializers.CharField()
    gatewayId = serializers.CharField()
    email = serializers.CharField()
    firstName = serializers.CharField()
    lastName = serializers.CharField()
    enabled = serializers.BooleanField()
    emailVerified = serializers.BooleanField()
    creationTime = UTCPosixTimestampDateTimeField()
    url = FullyEncodedHyperlinkedIdentityField(
        view_name='django_airavata_api:unverified-email-user-profile-detail',
        lookup_field='userId',
        lookup_url_kwarg='user_id')
    userHasWriteAccess = serializers.SerializerMethodField()

    def get_userHasWriteAccess(self, userProfile):
        request = self.context['request']
        return request.is_gateway_admin


class LogRecordSerializer(serializers.Serializer):
    level = serializers.CharField()
    message = serializers.CharField()
    details = StoredJSONField()
    stacktrace = serializers.ListField(child=serializers.CharField())


class SettingsSerializer(serializers.Serializer):
    fileUploadMaxFileSize = serializers.IntegerField()
    tusEndpoint = serializers.CharField()
    pgaUrl = serializers.CharField()


class QueueSettingsCalculatorSerializer(serializers.Serializer):
    id = serializers.CharField()
    name = serializers.CharField()