#
# Copyright (c) 2021-2026 ahriman team.
#
# This file is part of ahriman
# (see https://github.com/arcan1s/ahriman).
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from aiohttp.web import Response
from typing import ClassVar

from ahriman.models.user_access import UserAccess
from ahriman.web.apispec.decorators import apidocs
from ahriman.web.middlewares.metrics_handler import metrics
from ahriman.web.schemas import AnySchema
from ahriman.web.views.base import BaseView


class MetricsView(BaseView):
    """
    open metrics endpoints

    Attributes:
        GET_PERMISSION(UserAccess): (class attribute) get permissions of self
    """

    GET_PERMISSION: ClassVar[UserAccess] = UserAccess.Unauthorized
    ROUTES = ["/api/v1/metrics"]

    @apidocs(
        tags=["Status"],
        summary="OpenMetrics endpoint",
        description="Get service metrics in OpenMetrics format",
        permission=GET_PERMISSION,
        error_404_description="Endpoint is disabled",
        schema=AnySchema,
    )
    async def get(self) -> Response:
        """
        get service HTTP metrics

        Returns:
            Response: 200 with service metrics as generated by the library
        """
        return await metrics(self.request)
