# -*- coding: utf-8 -*-
# Copyright (C) 2019 Linaro Limited
#
# Author: Milosz Wasilewski <milosz.wasilewski@linaro.org>
#
# This file is part of LAVA.
#
# LAVA is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License version 3
# as published by the Free Software Foundation
#
# LAVA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with LAVA.  If not, see <http://www.gnu.org/licenses/>.

from lava_scheduler_app.models import (
    Device,
    DeviceType,
    GroupDeviceTypePermission,
    GroupDevicePermission,
    TestJob,
    Tag,
    Architecture,
    ProcessorFamily,
    Alias,
    Worker,
    BitWidth,
    Core,
    JobFailureTag,
)
from lava_results_app.models import TestCase, TestSuite, TestSet
from django.contrib.auth.models import User, Group, Permission
from django.core.exceptions import ValidationError
from django_filters.filters import CharFilter

import rest_framework_filters as filters

from lava_server.compat import RelatedFilter


class GroupFilter(filters.FilterSet):
    class Meta:
        model = Group
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"]
        }


class UserFilter(filters.FilterSet):
    group = RelatedFilter(GroupFilter, name="group", queryset=Group.objects.all())

    class Meta:
        model = User
        fields = {
            "username": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "email": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
        }


class PermissionFilter(filters.FilterSet):
    class Meta:
        model = Permission
        fields = {
            "codename": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ]
        }


class ArchitectureFilter(filters.FilterSet):
    class Meta:
        model = Architecture
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"]
        }


class ProcessorFamilyFilter(filters.FilterSet):
    class Meta:
        model = ProcessorFamily
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"]
        }


class AliasFilter(filters.FilterSet):
    class Meta:
        model = Alias
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"]
        }


class BitWidthFilter(filters.FilterSet):
    class Meta:
        model = BitWidth
        fields = {"width": ["exact", "in"]}


class CoreFilter(filters.FilterSet):
    class Meta:
        model = Core
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"]
        }


class TagFilter(filters.FilterSet):
    class Meta:
        model = Tag
        fields = {
            "name": [
                "exact",
                "iexact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
        }


class JobFailureTagFilter(filters.FilterSet):
    class Meta:
        model = JobFailureTag
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
        }


class WorkerFilter(filters.FilterSet):
    health = CharFilter(method="filter_health")
    state = CharFilter(method="filter_state")

    def filter_health(self, queryset, name, value):
        try:
            value = Worker.HEALTH_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*Worker.HEALTH_CHOICES))[1])
            )
        return queryset.filter(health=value)

    def filter_state(self, queryset, name, value):
        try:
            value = Worker.STATE_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*Worker.STATE_CHOICES))[1])
            )
        return queryset.filter(state=value)

    class Meta:
        model = Worker
        fields = {
            "hostname": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "last_ping": ["exact", "lt", "gt"],
            "state": ["exact", "iexact", "in"],
            "health": ["exact", "iexact", "in"],
        }


class DeviceTypeFilter(filters.FilterSet):
    architecture = RelatedFilter(
        ArchitectureFilter, name="architecture", queryset=Architecture.objects.all()
    )
    processor = RelatedFilter(
        ProcessorFamilyFilter, name="processor", queryset=ProcessorFamily.objects.all()
    )
    alias = RelatedFilter(AliasFilter, name="aliases", queryset=Alias.objects.all())
    bits = RelatedFilter(BitWidthFilter, name="bits", queryset=BitWidth.objects.all())
    cores = RelatedFilter(CoreFilter, name="cores", queryset=Core.objects.all())
    health_denominator = CharFilter(method="filter_health_denominator")

    def filter_health_denominator(self, queryset, name, value):
        try:
            value = DeviceType.HEALTH_DENOMINATOR_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*DeviceType.HEALTH_DENOMINATOR))[1])
            )
        return queryset.filter(health_denominator=value)

    class Meta:
        model = DeviceType
        fields = {
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
            "cpu_model": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "health_frequency": ["exact", "in"],
            "disable_health_check": ["exact", "in"],
            "health_denominator": ["exact"],
            "display": ["exact", "in"],
            "core_count": ["exact", "in"],
        }


class DeviceFilter(filters.FilterSet):
    device_type = RelatedFilter(
        DeviceTypeFilter, name="device_type", queryset=DeviceType.objects.all()
    )
    physical_owner = RelatedFilter(
        UserFilter, name="physical_owner", queryset=User.objects.all()
    )
    physical_group = RelatedFilter(
        GroupFilter, name="physical_group", queryset=Group.objects.all()
    )
    tags = RelatedFilter(TagFilter, name="tags", queryset=Tag.objects.all())
    last_health_report_job = RelatedFilter(
        "TestJobFilter",
        name="last_health_report_job",
        queryset=TestJob.objects.filter(health_check=True),
    )
    worker_host = RelatedFilter(
        WorkerFilter, name="worker_host", queryset=Worker.objects.all()
    )
    health = CharFilter(method="filter_health")
    state = CharFilter(method="filter_state")

    def filter_health(self, queryset, name, value):
        try:
            # Need upper() here because HEALTH_REVERSE has inconsistent keys.
            value = Device.HEALTH_REVERSE[value.upper()]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*Device.HEALTH_CHOICES))[1])
            )
        return queryset.filter(health=value)

    def filter_state(self, queryset, name, value):
        try:
            value = Device.STATE_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*Device.STATE_CHOICES))[1])
            )
        return queryset.filter(state=value)

    class Meta:
        model = Device
        fields = {
            "hostname": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "device_version": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "state": ["exact", "iexact", "in"],
            "health": ["exact", "iexact", "in"],
            "is_synced": ["exact"],
        }


class TestJobFilter(filters.FilterSet):
    requested_device_type = RelatedFilter(
        DeviceTypeFilter,
        name="requested_device_type",
        queryset=DeviceType.objects.all(),
    )
    actual_device = RelatedFilter(
        DeviceFilter, name="actual_device", queryset=Device.objects.all()
    )
    tags = RelatedFilter(TagFilter, name="tags", queryset=Tag.objects.all())
    viewing_groups = RelatedFilter(
        GroupFilter, name="viewing_groups", queryset=Group.objects.all()
    )
    submitter = RelatedFilter(UserFilter, name="submitter", queryset=User.objects.all())
    failure_tags = RelatedFilter(
        JobFailureTagFilter, name="failure_tags", queryset=JobFailureTag.objects.all()
    )
    health = CharFilter(method="filter_health")
    state = CharFilter(method="filter_state")

    def filter_health(self, queryset, name, value):
        try:
            value = TestJob.HEALTH_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*TestJob.HEALTH_CHOICES))[1])
            )
        return queryset.filter(health=value)

    def filter_state(self, queryset, name, value):
        try:
            value = TestJob.STATE_REVERSE[value]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(zip(*TestJob.STATE_CHOICES))[1])
            )
        return queryset.filter(state=value)

    class Meta:
        model = TestJob
        fields = {
            "id": ["exact", "lt", "gt", "in"],
            "submit_time": ["exact", "lt", "gt", "isnull"],
            "start_time": ["exact", "lt", "gt", "isnull"],
            "end_time": ["exact", "lt", "gt", "isnull"],
            "health_check": ["exact"],
            "target_group": [
                "exact",
                "iexact",
                "in",
                "contains",
                "icontains",
                "startswith",
            ],
            "state": ["exact", "iexact", "in"],
            "health": ["exact", "iexact", "in"],
            "priority": ["exact", "in", "lt", "lte", "gt", "gte"],
            "description": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "definition": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "original_definition": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "multinode_definition": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "failure_comment": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
                "isnull",
            ],
        }


class TestSuiteFilter(filters.FilterSet):
    class Meta:
        model = TestSuite
        fields = {
            "id": ["exact", "lt", "gt"],
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
        }


class TestSetFilter(filters.FilterSet):
    suite = RelatedFilter(
        "TestSuiteFilter", name="suite", queryset=TestSuite.objects.all()
    )

    class Meta:
        model = TestSet
        fields = {
            "id": ["exact", "lt", "gt"],
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
        }


class TestCaseFilter(filters.FilterSet):
    result = CharFilter(method="filter_result")
    suite = RelatedFilter(
        "TestSuiteFilter", name="suite", queryset=TestSuite.objects.all()
    )
    test_set = RelatedFilter(
        "TestSetFilter", name="test_set", queryset=TestSet.objects.all()
    )

    def filter_result(self, queryset, name, value):
        try:
            value = TestCase.RESULT_MAP[value.lower()]
        except KeyError:
            raise ValidationError(
                "Select a valid choice. %s is not one of the available choices: %s"
                % (value, list(TestCase.RESULT_MAP.keys()))
            )
        return queryset.filter(result=value)

    class Meta:
        model = TestCase
        exclude = {}
        fields = {
            "id": ["exact", "lt", "gt", "in"],
            "start_log_line": ["exact", "lt", "lte", "gt", "gte"],
            "end_log_line": ["exact", "lt", "lte", "gt", "gte"],
            "logged": ["exact", "lt", "lte", "gt", "gte"],
            "measurement": ["exact", "lt", "lte", "gt", "gte"],
            "metadata": [
                "exact",
                "in",
                "contains",
                "icontains",
                "startswith",
                "endswith",
            ],
            "units": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
            "name": ["exact", "in", "contains", "icontains", "startswith", "endswith"],
        }


class GroupDeviceTypePermissionFilter(filters.FilterSet):
    device_type = RelatedFilter(
        DeviceTypeFilter, name="device_type", queryset=DeviceType.objects.all()
    )
    group = RelatedFilter(GroupFilter, name="group", queryset=Group.objects.all())
    permission = RelatedFilter(
        PermissionFilter, name="permission", queryset=Permission.objects.all()
    )

    class Meta:
        model = GroupDeviceTypePermission
        exclude = {}


class GroupDevicePermissionFilter(filters.FilterSet):
    device = RelatedFilter(
        DeviceFilter, name="device", queryset=DeviceType.objects.all()
    )
    group = RelatedFilter(GroupFilter, name="group", queryset=Group.objects.all())
    permission = RelatedFilter(
        PermissionFilter, name="permission", queryset=Permission.objects.all()
    )

    class Meta:
        model = GroupDevicePermission
        exclude = {}
