from django.contrib import messages
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.contenttypes.models import ContentType
from django.core.paginator import EmptyPage
from django.db.models import Count, Q
from django.http import HttpResponseBadRequest, HttpResponseForbidden, HttpResponse
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse
from django.utils.translation import gettext as _
from django.views.generic import View

from core.choices import ManagedFileRootPathChoices
from core.forms import ManagedFileForm
from core.models import Job
from core.tables import JobTable
from dcim.models import Device, DeviceRole, Platform
from extras.dashboard.forms import DashboardWidgetAddForm, DashboardWidgetForm
from extras.dashboard.utils import get_widget_class
from netbox.constants import DEFAULT_ACTION_PERMISSIONS
from netbox.views import generic
from netbox.views.generic.mixins import TableMixin
from utilities.data import shallow_compare_dict
from utilities.forms import ConfirmationForm, get_field_value
from utilities.htmx import htmx_partial
from utilities.paginator import EnhancedPaginator, get_paginate_count
from utilities.query import count_related
from utilities.querydict import normalize_querydict
from utilities.request import copy_safe_request
from utilities.rqworker import get_workers_for_queue
from utilities.templatetags.builtins.filters import render_markdown
from utilities.views import ContentTypePermissionRequiredMixin, get_viewname, register_model_view
from virtualization.models import VirtualMachine
from . import filtersets, forms, tables
from .models import *
from .scripts import run_script
from .tables import ReportResultsTable, ScriptResultsTable


#
# Custom fields
#

class CustomFieldListView(generic.ObjectListView):
    queryset = CustomField.objects.select_related('choice_set')
    filterset = filtersets.CustomFieldFilterSet
    filterset_form = forms.CustomFieldFilterForm
    table = tables.CustomFieldTable


@register_model_view(CustomField)
class CustomFieldView(generic.ObjectView):
    queryset = CustomField.objects.select_related('choice_set')

    def get_extra_context(self, request, instance):
        related_models = ()

        for object_type in instance.object_types.all():
            related_models += (
                object_type.model_class().objects.restrict(request.user, 'view').exclude(
                    Q(**{f'custom_field_data__{instance.name}': ''}) |
                    Q(**{f'custom_field_data__{instance.name}': None})
                ),
            )

        return {
            'related_models': related_models
        }


@register_model_view(CustomField, 'edit')
class CustomFieldEditView(generic.ObjectEditView):
    queryset = CustomField.objects.select_related('choice_set')
    form = forms.CustomFieldForm


@register_model_view(CustomField, 'delete')
class CustomFieldDeleteView(generic.ObjectDeleteView):
    queryset = CustomField.objects.select_related('choice_set')


class CustomFieldBulkImportView(generic.BulkImportView):
    queryset = CustomField.objects.select_related('choice_set')
    model_form = forms.CustomFieldImportForm


class CustomFieldBulkEditView(generic.BulkEditView):
    queryset = CustomField.objects.select_related('choice_set')
    filterset = filtersets.CustomFieldFilterSet
    table = tables.CustomFieldTable
    form = forms.CustomFieldBulkEditForm


class CustomFieldBulkDeleteView(generic.BulkDeleteView):
    queryset = CustomField.objects.select_related('choice_set')
    filterset = filtersets.CustomFieldFilterSet
    table = tables.CustomFieldTable


#
# Custom field choices
#

class CustomFieldChoiceSetListView(generic.ObjectListView):
    queryset = CustomFieldChoiceSet.objects.all()
    filterset = filtersets.CustomFieldChoiceSetFilterSet
    filterset_form = forms.CustomFieldChoiceSetFilterForm
    table = tables.CustomFieldChoiceSetTable


@register_model_view(CustomFieldChoiceSet)
class CustomFieldChoiceSetView(generic.ObjectView):
    queryset = CustomFieldChoiceSet.objects.all()

    def get_extra_context(self, request, instance):

        # Paginate choices list
        per_page = get_paginate_count(request)
        try:
            page_number = request.GET.get('page', 1)
        except ValueError:
            page_number = 1
        paginator = EnhancedPaginator(instance.choices, per_page)
        try:
            choices = paginator.page(page_number)
        except EmptyPage:
            choices = paginator.page(paginator.num_pages)

        return {
            'paginator': paginator,
            'choices': choices,
        }


@register_model_view(CustomFieldChoiceSet, 'edit')
class CustomFieldChoiceSetEditView(generic.ObjectEditView):
    queryset = CustomFieldChoiceSet.objects.all()
    form = forms.CustomFieldChoiceSetForm


@register_model_view(CustomFieldChoiceSet, 'delete')
class CustomFieldChoiceSetDeleteView(generic.ObjectDeleteView):
    queryset = CustomFieldChoiceSet.objects.all()


class CustomFieldChoiceSetBulkImportView(generic.BulkImportView):
    queryset = CustomFieldChoiceSet.objects.all()
    model_form = forms.CustomFieldChoiceSetImportForm


class CustomFieldChoiceSetBulkEditView(generic.BulkEditView):
    queryset = CustomFieldChoiceSet.objects.all()
    filterset = filtersets.CustomFieldChoiceSetFilterSet
    table = tables.CustomFieldChoiceSetTable
    form = forms.CustomFieldChoiceSetBulkEditForm


class CustomFieldChoiceSetBulkDeleteView(generic.BulkDeleteView):
    queryset = CustomFieldChoiceSet.objects.all()
    filterset = filtersets.CustomFieldChoiceSetFilterSet
    table = tables.CustomFieldChoiceSetTable


#
# Custom links
#

class CustomLinkListView(generic.ObjectListView):
    queryset = CustomLink.objects.all()
    filterset = filtersets.CustomLinkFilterSet
    filterset_form = forms.CustomLinkFilterForm
    table = tables.CustomLinkTable


@register_model_view(CustomLink)
class CustomLinkView(generic.ObjectView):
    queryset = CustomLink.objects.all()


@register_model_view(CustomLink, 'edit')
class CustomLinkEditView(generic.ObjectEditView):
    queryset = CustomLink.objects.all()
    form = forms.CustomLinkForm


@register_model_view(CustomLink, 'delete')
class CustomLinkDeleteView(generic.ObjectDeleteView):
    queryset = CustomLink.objects.all()


class CustomLinkBulkImportView(generic.BulkImportView):
    queryset = CustomLink.objects.all()
    model_form = forms.CustomLinkImportForm


class CustomLinkBulkEditView(generic.BulkEditView):
    queryset = CustomLink.objects.all()
    filterset = filtersets.CustomLinkFilterSet
    table = tables.CustomLinkTable
    form = forms.CustomLinkBulkEditForm


class CustomLinkBulkDeleteView(generic.BulkDeleteView):
    queryset = CustomLink.objects.all()
    filterset = filtersets.CustomLinkFilterSet
    table = tables.CustomLinkTable


#
# Export templates
#

class ExportTemplateListView(generic.ObjectListView):
    queryset = ExportTemplate.objects.all()
    filterset = filtersets.ExportTemplateFilterSet
    filterset_form = forms.ExportTemplateFilterForm
    table = tables.ExportTemplateTable
    template_name = 'extras/exporttemplate_list.html'
    actions = {
        **DEFAULT_ACTION_PERMISSIONS,
        'bulk_sync': {'sync'},
    }


@register_model_view(ExportTemplate)
class ExportTemplateView(generic.ObjectView):
    queryset = ExportTemplate.objects.all()


@register_model_view(ExportTemplate, 'edit')
class ExportTemplateEditView(generic.ObjectEditView):
    queryset = ExportTemplate.objects.all()
    form = forms.ExportTemplateForm


@register_model_view(ExportTemplate, 'delete')
class ExportTemplateDeleteView(generic.ObjectDeleteView):
    queryset = ExportTemplate.objects.all()


class ExportTemplateBulkImportView(generic.BulkImportView):
    queryset = ExportTemplate.objects.all()
    model_form = forms.ExportTemplateImportForm


class ExportTemplateBulkEditView(generic.BulkEditView):
    queryset = ExportTemplate.objects.all()
    filterset = filtersets.ExportTemplateFilterSet
    table = tables.ExportTemplateTable
    form = forms.ExportTemplateBulkEditForm


class ExportTemplateBulkDeleteView(generic.BulkDeleteView):
    queryset = ExportTemplate.objects.all()
    filterset = filtersets.ExportTemplateFilterSet
    table = tables.ExportTemplateTable


class ExportTemplateBulkSyncDataView(generic.BulkSyncDataView):
    queryset = ExportTemplate.objects.all()


#
# Saved filters
#

class SavedFilterMixin:

    def get_queryset(self, request):
        """
        Return only shared SavedFilters, or those owned by the current user, unless
        this is a superuser.
        """
        queryset = SavedFilter.objects.all()
        user = request.user
        if user.is_superuser:
            return queryset
        if user.is_anonymous:
            return queryset.filter(shared=True)
        return queryset.filter(
            Q(shared=True) | Q(user=user)
        )


class SavedFilterListView(SavedFilterMixin, generic.ObjectListView):
    filterset = filtersets.SavedFilterFilterSet
    filterset_form = forms.SavedFilterFilterForm
    table = tables.SavedFilterTable


@register_model_view(SavedFilter)
class SavedFilterView(SavedFilterMixin, generic.ObjectView):
    queryset = SavedFilter.objects.all()


@register_model_view(SavedFilter, 'edit')
class SavedFilterEditView(SavedFilterMixin, generic.ObjectEditView):
    queryset = SavedFilter.objects.all()
    form = forms.SavedFilterForm

    def alter_object(self, obj, request, url_args, url_kwargs):
        if not obj.pk:
            obj.user = request.user
        return obj


@register_model_view(SavedFilter, 'delete')
class SavedFilterDeleteView(SavedFilterMixin, generic.ObjectDeleteView):
    queryset = SavedFilter.objects.all()


class SavedFilterBulkImportView(SavedFilterMixin, generic.BulkImportView):
    queryset = SavedFilter.objects.all()
    model_form = forms.SavedFilterImportForm


class SavedFilterBulkEditView(SavedFilterMixin, generic.BulkEditView):
    queryset = SavedFilter.objects.all()
    filterset = filtersets.SavedFilterFilterSet
    table = tables.SavedFilterTable
    form = forms.SavedFilterBulkEditForm


class SavedFilterBulkDeleteView(SavedFilterMixin, generic.BulkDeleteView):
    queryset = SavedFilter.objects.all()
    filterset = filtersets.SavedFilterFilterSet
    table = tables.SavedFilterTable


#
# Bookmarks
#

class BookmarkCreateView(generic.ObjectEditView):
    form = forms.BookmarkForm

    def get_queryset(self, request):
        return Bookmark.objects.filter(user=request.user)

    def alter_object(self, obj, request, url_args, url_kwargs):
        obj.user = request.user
        return obj


@register_model_view(Bookmark, 'delete')
class BookmarkDeleteView(generic.ObjectDeleteView):

    def get_queryset(self, request):
        return Bookmark.objects.filter(user=request.user)


class BookmarkBulkDeleteView(generic.BulkDeleteView):
    table = tables.BookmarkTable

    def get_queryset(self, request):
        return Bookmark.objects.filter(user=request.user)


#
# Webhooks
#

class WebhookListView(generic.ObjectListView):
    queryset = Webhook.objects.all()
    filterset = filtersets.WebhookFilterSet
    filterset_form = forms.WebhookFilterForm
    table = tables.WebhookTable


@register_model_view(Webhook)
class WebhookView(generic.ObjectView):
    queryset = Webhook.objects.all()


@register_model_view(Webhook, 'edit')
class WebhookEditView(generic.ObjectEditView):
    queryset = Webhook.objects.all()
    form = forms.WebhookForm


@register_model_view(Webhook, 'delete')
class WebhookDeleteView(generic.ObjectDeleteView):
    queryset = Webhook.objects.all()


class WebhookBulkImportView(generic.BulkImportView):
    queryset = Webhook.objects.all()
    model_form = forms.WebhookImportForm


class WebhookBulkEditView(generic.BulkEditView):
    queryset = Webhook.objects.all()
    filterset = filtersets.WebhookFilterSet
    table = tables.WebhookTable
    form = forms.WebhookBulkEditForm


class WebhookBulkDeleteView(generic.BulkDeleteView):
    queryset = Webhook.objects.all()
    filterset = filtersets.WebhookFilterSet
    table = tables.WebhookTable


#
# Event Rules
#

class EventRuleListView(generic.ObjectListView):
    queryset = EventRule.objects.all()
    filterset = filtersets.EventRuleFilterSet
    filterset_form = forms.EventRuleFilterForm
    table = tables.EventRuleTable


@register_model_view(EventRule)
class EventRuleView(generic.ObjectView):
    queryset = EventRule.objects.all()


@register_model_view(EventRule, 'edit')
class EventRuleEditView(generic.ObjectEditView):
    queryset = EventRule.objects.all()
    form = forms.EventRuleForm


@register_model_view(EventRule, 'delete')
class EventRuleDeleteView(generic.ObjectDeleteView):
    queryset = EventRule.objects.all()


class EventRuleBulkImportView(generic.BulkImportView):
    queryset = EventRule.objects.all()
    model_form = forms.EventRuleImportForm


class EventRuleBulkEditView(generic.BulkEditView):
    queryset = EventRule.objects.all()
    filterset = filtersets.EventRuleFilterSet
    table = tables.EventRuleTable
    form = forms.EventRuleBulkEditForm


class EventRuleBulkDeleteView(generic.BulkDeleteView):
    queryset = EventRule.objects.all()
    filterset = filtersets.EventRuleFilterSet
    table = tables.EventRuleTable


#
# Tags
#

class TagListView(generic.ObjectListView):
    queryset = Tag.objects.annotate(
        items=count_related(TaggedItem, 'tag')
    )
    filterset = filtersets.TagFilterSet
    filterset_form = forms.TagFilterForm
    table = tables.TagTable


@register_model_view(Tag)
class TagView(generic.ObjectView):
    queryset = Tag.objects.all()

    def get_extra_context(self, request, instance):
        tagged_items = TaggedItem.objects.filter(tag=instance)
        taggeditem_table = tables.TaggedItemTable(
            data=tagged_items,
            orderable=False
        )
        taggeditem_table.configure(request)

        object_types = [
            {
                'content_type': ContentType.objects.get(pk=ti['content_type']),
                'item_count': ti['item_count']
            } for ti in tagged_items.values('content_type').annotate(item_count=Count('pk'))
        ]

        return {
            'taggeditem_table': taggeditem_table,
            'tagged_item_count': tagged_items.count(),
            'object_types': object_types,
        }


@register_model_view(Tag, 'edit')
class TagEditView(generic.ObjectEditView):
    queryset = Tag.objects.all()
    form = forms.TagForm


@register_model_view(Tag, 'delete')
class TagDeleteView(generic.ObjectDeleteView):
    queryset = Tag.objects.all()


class TagBulkImportView(generic.BulkImportView):
    queryset = Tag.objects.all()
    model_form = forms.TagImportForm


class TagBulkEditView(generic.BulkEditView):
    queryset = Tag.objects.annotate(
        items=count_related(TaggedItem, 'tag')
    )
    table = tables.TagTable
    form = forms.TagBulkEditForm


class TagBulkDeleteView(generic.BulkDeleteView):
    queryset = Tag.objects.annotate(
        items=count_related(TaggedItem, 'tag')
    )
    table = tables.TagTable


#
# Config contexts
#

class ConfigContextListView(generic.ObjectListView):
    queryset = ConfigContext.objects.all()
    filterset = filtersets.ConfigContextFilterSet
    filterset_form = forms.ConfigContextFilterForm
    table = tables.ConfigContextTable
    template_name = 'extras/configcontext_list.html'
    actions = {
        'add': {'add'},
        'bulk_edit': {'change'},
        'bulk_delete': {'delete'},
        'bulk_sync': {'sync'},
    }


@register_model_view(ConfigContext)
class ConfigContextView(generic.ObjectView):
    queryset = ConfigContext.objects.all()

    def get_extra_context(self, request, instance):
        # Gather assigned objects for parsing in the template
        assigned_objects = (
            ('Regions', instance.regions.all),
            ('Site Groups', instance.site_groups.all),
            ('Sites', instance.sites.all),
            ('Locations', instance.locations.all),
            ('Device Types', instance.device_types.all),
            ('Roles', instance.roles.all),
            ('Platforms', instance.platforms.all),
            ('Cluster Types', instance.cluster_types.all),
            ('Cluster Groups', instance.cluster_groups.all),
            ('Clusters', instance.clusters.all),
            ('Tenant Groups', instance.tenant_groups.all),
            ('Tenants', instance.tenants.all),
            ('Tags', instance.tags.all),
        )

        # Determine user's preferred output format
        if request.GET.get('format') in ['json', 'yaml']:
            format = request.GET.get('format')
            if request.user.is_authenticated:
                request.user.config.set('data_format', format, commit=True)
        elif request.user.is_authenticated:
            format = request.user.config.get('data_format', 'json')
        else:
            format = 'json'

        return {
            'assigned_objects': assigned_objects,
            'format': format,
        }


@register_model_view(ConfigContext, 'edit')
class ConfigContextEditView(generic.ObjectEditView):
    queryset = ConfigContext.objects.all()
    form = forms.ConfigContextForm


class ConfigContextBulkEditView(generic.BulkEditView):
    queryset = ConfigContext.objects.all()
    filterset = filtersets.ConfigContextFilterSet
    table = tables.ConfigContextTable
    form = forms.ConfigContextBulkEditForm


@register_model_view(ConfigContext, 'delete')
class ConfigContextDeleteView(generic.ObjectDeleteView):
    queryset = ConfigContext.objects.all()


class ConfigContextBulkDeleteView(generic.BulkDeleteView):
    queryset = ConfigContext.objects.all()
    filterset = filtersets.ConfigContextFilterSet
    table = tables.ConfigContextTable


class ConfigContextBulkSyncDataView(generic.BulkSyncDataView):
    queryset = ConfigContext.objects.all()


class ObjectConfigContextView(generic.ObjectView):
    base_template = None
    template_name = 'extras/object_configcontext.html'

    def get_extra_context(self, request, instance):
        source_contexts = ConfigContext.objects.restrict(request.user, 'view').get_for_object(instance)

        # Determine user's preferred output format
        if request.GET.get('format') in ['json', 'yaml']:
            format = request.GET.get('format')
            if request.user.is_authenticated:
                request.user.config.set('data_format', format, commit=True)
        elif request.user.is_authenticated:
            format = request.user.config.get('data_format', 'json')
        else:
            format = 'json'

        return {
            'rendered_context': instance.get_config_context(),
            'source_contexts': source_contexts,
            'format': format,
            'base_template': self.base_template,
        }


#
# Config templates
#

class ConfigTemplateListView(generic.ObjectListView):
    queryset = ConfigTemplate.objects.annotate(
        device_count=count_related(Device, 'config_template'),
        vm_count=count_related(VirtualMachine, 'config_template'),
        role_count=count_related(DeviceRole, 'config_template'),
        platform_count=count_related(Platform, 'config_template'),
    )
    filterset = filtersets.ConfigTemplateFilterSet
    filterset_form = forms.ConfigTemplateFilterForm
    table = tables.ConfigTemplateTable
    template_name = 'extras/configtemplate_list.html'
    actions = {
        **DEFAULT_ACTION_PERMISSIONS,
        'bulk_sync': {'sync'},
    }


@register_model_view(ConfigTemplate)
class ConfigTemplateView(generic.ObjectView):
    queryset = ConfigTemplate.objects.all()


@register_model_view(ConfigTemplate, 'edit')
class ConfigTemplateEditView(generic.ObjectEditView):
    queryset = ConfigTemplate.objects.all()
    form = forms.ConfigTemplateForm


@register_model_view(ConfigTemplate, 'delete')
class ConfigTemplateDeleteView(generic.ObjectDeleteView):
    queryset = ConfigTemplate.objects.all()


class ConfigTemplateBulkImportView(generic.BulkImportView):
    queryset = ConfigTemplate.objects.all()
    model_form = forms.ConfigTemplateImportForm


class ConfigTemplateBulkEditView(generic.BulkEditView):
    queryset = ConfigTemplate.objects.all()
    filterset = filtersets.ConfigTemplateFilterSet
    table = tables.ConfigTemplateTable
    form = forms.ConfigTemplateBulkEditForm


class ConfigTemplateBulkDeleteView(generic.BulkDeleteView):
    queryset = ConfigTemplate.objects.all()
    filterset = filtersets.ConfigTemplateFilterSet
    table = tables.ConfigTemplateTable


class ConfigTemplateBulkSyncDataView(generic.BulkSyncDataView):
    queryset = ConfigTemplate.objects.all()


#
# Change logging
#

class ObjectChangeListView(generic.ObjectListView):
    queryset = ObjectChange.objects.valid_models()
    filterset = filtersets.ObjectChangeFilterSet
    filterset_form = forms.ObjectChangeFilterForm
    table = tables.ObjectChangeTable
    template_name = 'extras/objectchange_list.html'
    actions = {
        'export': {'view'},
    }


@register_model_view(ObjectChange)
class ObjectChangeView(generic.ObjectView):
    queryset = ObjectChange.objects.valid_models()

    def get_extra_context(self, request, instance):
        related_changes = ObjectChange.objects.valid_models().restrict(request.user, 'view').filter(
            request_id=instance.request_id
        ).exclude(
            pk=instance.pk
        )
        related_changes_table = tables.ObjectChangeTable(
            data=related_changes[:50],
            orderable=False
        )

        objectchanges = ObjectChange.objects.valid_models().restrict(request.user, 'view').filter(
            changed_object_type=instance.changed_object_type,
            changed_object_id=instance.changed_object_id,
        )

        next_change = objectchanges.filter(time__gt=instance.time).order_by('time').first()
        prev_change = objectchanges.filter(time__lt=instance.time).order_by('-time').first()

        if not instance.prechange_data and instance.action in ['update', 'delete'] and prev_change:
            non_atomic_change = True
            prechange_data = prev_change.postchange_data
        else:
            non_atomic_change = False
            prechange_data = instance.prechange_data

        if prechange_data and instance.postchange_data:
            diff_added = shallow_compare_dict(
                prechange_data or dict(),
                instance.postchange_data or dict(),
                exclude=['last_updated'],
            )
            diff_removed = {
                x: prechange_data.get(x) for x in diff_added
            } if prechange_data else {}
        else:
            diff_added = None
            diff_removed = None

        return {
            'diff_added': diff_added,
            'diff_removed': diff_removed,
            'next_change': next_change,
            'prev_change': prev_change,
            'related_changes_table': related_changes_table,
            'related_changes_count': related_changes.count(),
            'non_atomic_change': non_atomic_change
        }


#
# Image attachments
#

class ImageAttachmentListView(generic.ObjectListView):
    queryset = ImageAttachment.objects.all()
    filterset = filtersets.ImageAttachmentFilterSet
    filterset_form = forms.ImageAttachmentFilterForm
    table = tables.ImageAttachmentTable
    actions = {
        'export': {'view'},
    }


@register_model_view(ImageAttachment, 'edit')
class ImageAttachmentEditView(generic.ObjectEditView):
    queryset = ImageAttachment.objects.all()
    form = forms.ImageAttachmentForm

    def alter_object(self, instance, request, args, kwargs):
        if not instance.pk:
            # Assign the parent object based on URL kwargs
            object_type = get_object_or_404(ContentType, pk=request.GET.get('object_type'))
            instance.parent = get_object_or_404(object_type.model_class(), pk=request.GET.get('object_id'))
        return instance

    def get_return_url(self, request, obj=None):
        return obj.parent.get_absolute_url() if obj else super().get_return_url(request)

    def get_extra_addanother_params(self, request):
        return {
            'object_type': request.GET.get('object_type'),
            'object_id': request.GET.get('object_id'),
        }


@register_model_view(ImageAttachment, 'delete')
class ImageAttachmentDeleteView(generic.ObjectDeleteView):
    queryset = ImageAttachment.objects.all()

    def get_return_url(self, request, obj=None):
        return obj.parent.get_absolute_url() if obj else super().get_return_url(request)


#
# Journal entries
#

class JournalEntryListView(generic.ObjectListView):
    queryset = JournalEntry.objects.all()
    filterset = filtersets.JournalEntryFilterSet
    filterset_form = forms.JournalEntryFilterForm
    table = tables.JournalEntryTable
    actions = {
        'import': {'add'},
        'export': {'view'},
        'bulk_edit': {'change'},
        'bulk_delete': {'delete'},
    }


@register_model_view(JournalEntry)
class JournalEntryView(generic.ObjectView):
    queryset = JournalEntry.objects.all()


@register_model_view(JournalEntry, 'edit')
class JournalEntryEditView(generic.ObjectEditView):
    queryset = JournalEntry.objects.all()
    form = forms.JournalEntryForm

    def alter_object(self, obj, request, args, kwargs):
        if not obj.pk:
            obj.created_by = request.user
        return obj

    def get_return_url(self, request, instance):
        if not instance.assigned_object:
            return reverse('extras:journalentry_list')
        obj = instance.assigned_object
        viewname = get_viewname(obj, 'journal')
        return reverse(viewname, kwargs={'pk': obj.pk})


@register_model_view(JournalEntry, 'delete')
class JournalEntryDeleteView(generic.ObjectDeleteView):
    queryset = JournalEntry.objects.all()

    def get_return_url(self, request, instance):
        obj = instance.assigned_object
        viewname = get_viewname(obj, 'journal')
        return reverse(viewname, kwargs={'pk': obj.pk})


class JournalEntryBulkEditView(generic.BulkEditView):
    queryset = JournalEntry.objects.all()
    filterset = filtersets.JournalEntryFilterSet
    table = tables.JournalEntryTable
    form = forms.JournalEntryBulkEditForm


class JournalEntryBulkDeleteView(generic.BulkDeleteView):
    queryset = JournalEntry.objects.all()
    filterset = filtersets.JournalEntryFilterSet
    table = tables.JournalEntryTable


class JournalEntryBulkImportView(generic.BulkImportView):
    queryset = JournalEntry.objects.all()
    model_form = forms.JournalEntryImportForm


#
# Dashboard & widgets
#

class DashboardResetView(LoginRequiredMixin, View):
    template_name = 'extras/dashboard/reset.html'

    def get(self, request):
        get_object_or_404(Dashboard.objects.all(), user=request.user)
        form = ConfirmationForm()

        return render(request, self.template_name, {
            'form': form,
            'return_url': reverse('home'),
        })

    def post(self, request):
        dashboard = get_object_or_404(Dashboard.objects.all(), user=request.user)
        form = ConfirmationForm(request.POST)

        if form.is_valid():
            dashboard.delete()
            messages.success(request, _("Your dashboard has been reset."))
            return redirect(reverse('home'))

        return render(request, self.template_name, {
            'form': form,
            'return_url': reverse('home'),
        })


class DashboardWidgetAddView(LoginRequiredMixin, View):
    template_name = 'extras/dashboard/widget_add.html'

    def get(self, request):
        if not request.htmx:
            return redirect('home')

        initial = request.GET or {
            'widget_class': 'extras.NoteWidget',
        }
        widget_form = DashboardWidgetAddForm(initial=initial)
        widget_name = get_field_value(widget_form, 'widget_class')
        widget_class = get_widget_class(widget_name)
        config_form = widget_class.ConfigForm(initial=widget_class.default_config, prefix='config')

        return render(request, self.template_name, {
            'widget_class': widget_class,
            'widget_form': widget_form,
            'config_form': config_form,
        })

    def post(self, request):
        widget_form = DashboardWidgetAddForm(request.POST)
        config_form = None
        widget_class = None

        if widget_form.is_valid():
            widget_class = get_widget_class(widget_form.cleaned_data['widget_class'])
            config_form = widget_class.ConfigForm(request.POST, prefix='config')

            if config_form.is_valid():
                data = widget_form.cleaned_data
                data.pop('widget_class')
                data['config'] = config_form.cleaned_data
                widget = widget_class(**data)
                request.user.dashboard.add_widget(widget)
                request.user.dashboard.save()
                messages.success(request, _('Added widget: ') + str(widget.id))

                return HttpResponse(headers={
                    'HX-Redirect': reverse('home'),
                })

        return render(request, self.template_name, {
            'widget_class': widget_class,
            'widget_form': widget_form,
            'config_form': config_form,
        })


class DashboardWidgetConfigView(LoginRequiredMixin, View):
    template_name = 'extras/dashboard/widget_config.html'

    def get(self, request, id):
        if not request.htmx:
            return redirect('home')

        widget = request.user.dashboard.get_widget(id)
        widget_form = DashboardWidgetForm(initial=widget.form_data)
        config_form = widget.ConfigForm(initial=widget.form_data.get('config'), prefix='config')

        return render(request, self.template_name, {
            'widget_class': widget.__class__,
            'widget_form': widget_form,
            'config_form': config_form,
            'form_url': reverse('extras:dashboardwidget_config', kwargs={'id': id})
        })

    def post(self, request, id):
        widget = request.user.dashboard.get_widget(id)
        widget_form = DashboardWidgetForm(request.POST)
        config_form = widget.ConfigForm(request.POST, prefix='config')

        if widget_form.is_valid() and config_form.is_valid():
            data = widget_form.cleaned_data
            data['config'] = config_form.cleaned_data
            request.user.dashboard.config[str(id)].update(data)
            request.user.dashboard.save()
            messages.success(request, _('Updated widget: ') + str(widget.id))

            return HttpResponse(headers={
                'HX-Redirect': reverse('home'),
            })

        return render(request, self.template_name, {
            'widget_form': widget_form,
            'config_form': config_form,
            'form_url': reverse('extras:dashboardwidget_config', kwargs={'id': id})
        })


class DashboardWidgetDeleteView(LoginRequiredMixin, View):
    template_name = 'generic/object_delete.html'

    def get(self, request, id):
        if not request.htmx:
            return redirect('home')

        widget = request.user.dashboard.get_widget(id)
        form = ConfirmationForm(initial=request.GET)

        return render(request, 'htmx/delete_form.html', {
            'object_type': widget.__class__.__name__,
            'object': widget,
            'form': form,
            'form_url': reverse('extras:dashboardwidget_delete', kwargs={'id': id})
        })

    def post(self, request, id):
        form = ConfirmationForm(request.POST)

        if form.is_valid():
            request.user.dashboard.delete_widget(id)
            request.user.dashboard.save()
            messages.success(request, _('Deleted widget: ') + str(id))
        else:
            messages.error(request, _('Error deleting widget: ') + str(form.errors[0]))

        return redirect(reverse('home'))


#
# Scripts
#

@register_model_view(ScriptModule, 'edit')
class ScriptModuleCreateView(generic.ObjectEditView):
    queryset = ScriptModule.objects.all()
    form = ManagedFileForm

    def alter_object(self, obj, *args, **kwargs):
        obj.file_root = ManagedFileRootPathChoices.SCRIPTS
        return obj


@register_model_view(ScriptModule, 'delete')
class ScriptModuleDeleteView(generic.ObjectDeleteView):
    queryset = ScriptModule.objects.all()
    default_return_url = 'extras:script_list'


class ScriptListView(ContentTypePermissionRequiredMixin, View):

    def get_required_permission(self):
        return 'extras.view_script'

    def get(self, request):
        script_modules = ScriptModule.objects.restrict(request.user).prefetch_related(
            'data_source', 'data_file', 'jobs'
        )

        return render(request, 'extras/script_list.html', {
            'model': ScriptModule,
            'script_modules': script_modules,
        })


class ScriptView(generic.ObjectView):
    queryset = Script.objects.all()

    def get(self, request, **kwargs):
        script = self.get_object(**kwargs)
        script_class = script.python_class()
        form = script_class.as_form(initial=normalize_querydict(request.GET))

        return render(request, 'extras/script.html', {
            'script': script,
            'script_class': script_class,
            'form': form,
            'job_count': script.jobs.count(),
        })

    def post(self, request, **kwargs):
        script = self.get_object(**kwargs)
        script_class = script.python_class()

        if not request.user.has_perm('extras.run_script', obj=script):
            return HttpResponseForbidden()

        form = script_class.as_form(request.POST, request.FILES)

        # Allow execution only if RQ worker process is running
        if not get_workers_for_queue('default'):
            messages.error(request, _("Unable to run script: RQ worker process not running."))
        elif form.is_valid():
            job = Job.enqueue(
                run_script,
                instance=script,
                name=script_class.class_name,
                user=request.user,
                schedule_at=form.cleaned_data.pop('_schedule_at'),
                interval=form.cleaned_data.pop('_interval'),
                data=form.cleaned_data,
                request=copy_safe_request(request),
                job_timeout=script.python_class.job_timeout,
                commit=form.cleaned_data.pop('_commit')
            )

            return redirect('extras:script_result', job_pk=job.pk)

        return render(request, 'extras/script.html', {
            'script': script,
            'script_class': script.python_class(),
            'form': form,
            'job_count': script.jobs.count(),
        })


class ScriptSourceView(generic.ObjectView):
    queryset = Script.objects.all()

    def get(self, request, **kwargs):
        script = self.get_object(**kwargs)

        return render(request, 'extras/script/source.html', {
            'script': script,
            'script_class': script.python_class(),
            'job_count': script.jobs.count(),
            'tab': 'source',
        })


class ScriptJobsView(generic.ObjectView):
    queryset = Script.objects.all()

    def get(self, request, **kwargs):
        script = self.get_object(**kwargs)

        jobs_table = JobTable(
            data=script.jobs.all(),
            orderable=False,
            user=request.user
        )
        jobs_table.configure(request)

        return render(request, 'extras/script/jobs.html', {
            'script': script,
            'table': jobs_table,
            'job_count': script.jobs.count(),
            'tab': 'jobs',
        })


class LegacyScriptRedirectView(ContentTypePermissionRequiredMixin, View):
    """
    Redirect legacy (pre-v4.0) script URLs. Examples:
        /extras/scripts/<module>/<name>/         -->  /extras/scripts/<id>/
        /extras/scripts/<module>/<name>/source/  -->  /extras/scripts/<id>/source/
        /extras/scripts/<module>/<name>/jobs/    -->  /extras/scripts/<id>/jobs/
    """
    def get_required_permission(self):
        return 'extras.view_script'

    def get(self, request, module, name, path=''):
        module = get_object_or_404(ScriptModule.objects.restrict(request.user), file_path__regex=f"^{module}\\.")
        script = get_object_or_404(Script.objects.all(), module=module, name=name)

        url = reverse('extras:script', kwargs={'pk': script.pk})

        return redirect(f'{url}{path}')


class ScriptResultView(TableMixin, generic.ObjectView):
    queryset = Job.objects.all()

    def get_required_permission(self):
        return 'extras.view_script'

    def get_table(self, job, request, bulk_actions=True):
        data = []
        tests = None
        table = None
        index = 0
        if job.data:
            if 'log' in job.data:
                if 'tests' in job.data:
                    tests = job.data['tests']

                for log in job.data['log']:
                    index += 1
                    result = {
                        'index': index,
                        'time': log.get('time'),
                        'status': log.get('status'),
                        'message': log.get('message'),
                    }
                    data.append(result)

                table = ScriptResultsTable(data, user=request.user)
                table.configure(request)
            else:
                # for legacy reports
                tests = job.data

        if tests:
            for method, test_data in tests.items():
                if 'log' in test_data:
                    for time, status, obj, url, message in test_data['log']:
                        index += 1
                        result = {
                            'index': index,
                            'method': method,
                            'time': time,
                            'status': status,
                            'object': obj,
                            'url': url,
                            'message': message,
                        }
                        data.append(result)

            table = ReportResultsTable(data, user=request.user)
            table.configure(request)

        return table

    def get(self, request, **kwargs):
        table = None
        job = get_object_or_404(Job.objects.all(), pk=kwargs.get('job_pk'))

        if job.completed:
            table = self.get_table(job, request, bulk_actions=False)

        context = {
            'script': job.object,
            'job': job,
            'table': table,
        }

        if job.data and 'log' in job.data:
            # Script
            context['tests'] = job.data.get('tests', {})
        elif job.data:
            # Legacy Report
            context['tests'] = {
                name: data for name, data in job.data.items()
                if name.startswith('test_')
            }

        # If this is an HTMX request, return only the result HTML
        if htmx_partial(request):
            response = render(request, 'extras/htmx/script_result.html', context)
            if job.completed or not job.started:
                response.status_code = 286
            return response

        return render(request, 'extras/script_result.html', context)


#
# Markdown
#

class RenderMarkdownView(View):

    def post(self, request):
        form = forms.RenderMarkdownForm(request.POST)
        if not form.is_valid():
            HttpResponseBadRequest()
        rendered = render_markdown(form.cleaned_data['text'])

        return HttpResponse(rendered)