from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from django.shortcuts import render
from mixins.views import ObjectCreate, ObjectDelete, ObjectList, ObjectUpdate
from rest_framework.views import APIView

from core.db.storage import db
from core.forms import NotificationRuleForm, NotificationSettingsForm
from core.lib.rules import NotificationRuleData
from core.models import NotificationRule, NotificationSettings


# Notifications - we create a new notification settings object if there isn't one
# Hence, there is only an update view, not a create view.
class NotificationsUpdate(LoginRequiredMixin, ObjectUpdate):
    model = NotificationSettings
    form_class = NotificationSettingsForm

    page_title = "Update your notification settings"
    page_subtitle = (
        "At least the topic must be set if you want to receive notifications."
    )

    submit_url_name = "notifications_update"
    submit_url_args = ["type"]

    pk_required = False

    hide_cancel = True

    def get_object(self, **kwargs):
        notification_settings, _ = NotificationSettings.objects.get_or_create(
            user=self.request.user
        )
        return notification_settings


class RuleList(LoginRequiredMixin, ObjectList):
    list_template = "partials/rule-list.html"
    model = NotificationRule
    page_title = "List of notification rules"

    list_url_name = "rules"
    list_url_args = ["type"]

    submit_url_name = "rule_create"


class RuleCreate(LoginRequiredMixin, PermissionRequiredMixin, ObjectCreate):
    permission_required = "use_rules"
    model = NotificationRule
    form_class = NotificationRuleForm

    submit_url_name = "rule_create"


class RuleUpdate(LoginRequiredMixin, PermissionRequiredMixin, ObjectUpdate):
    permission_required = "use_rules"
    model = NotificationRule
    form_class = NotificationRuleForm

    submit_url_name = "rule_update"


class RuleDelete(LoginRequiredMixin, PermissionRequiredMixin, ObjectDelete):
    permission_required = "use_rules"
    model = NotificationRule


class RuleClear(LoginRequiredMixin, PermissionRequiredMixin, APIView):
    permission_required = "use_rules"

    def post(self, request, type, pk):
        template_name = "mixins/partials/notify.html"
        rule = NotificationRule.objects.get(pk=pk, user=request.user)
        if isinstance(rule.match, dict):
            for index in rule.match:
                rule.match[index] = None
        rule.save()

        rule_data = NotificationRuleData(rule.user, rule, db=db)
        rule_data.clear_database_matches()

        cleared_indices = ", ".join(rule.match)
        context = {
            "message": f"Cleared match status for indices: {cleared_indices}",
            "class": "success",
        }
        response = render(request, template_name, context)
        response["HX-Trigger"] = "notificationruleEvent"
        return response