#
# Copyright (C) 2020 GNS3 Technologies Inc.
#
# 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/>.


import sys

import psutil
import pytest
from fastapi import FastAPI, status
from httpx import AsyncClient

from gns3server.utils.path import get_default_project_directory
from gns3server.version import __version__

pytestmark = pytest.mark.asyncio


async def _no_tap_probe():
    """The probes spawn uBridge — stub them out for payload assertions."""

    return None


class TestCapabilitiesRoutes:
    async def test_get(self, app: FastAPI, compute_client: AsyncClient, windows_platform, monkeypatch) -> None:

        async def no_probe():
            return None

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tc_capabilities", no_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json() == {
            "node_types": [
                "cloud",
                "ethernet_hub",
                "ethernet_switch",
                "nat",
                "vpcs",
                "virtualbox",
                "dynamips",
                "frame_relay_switch",
                "atm_switch",
                "qemu",
                "vmware",
                "docker",
                "iou",
            ],
            "version": __version__,
            "platform": sys.platform,
            "cpus": psutil.cpu_count(logical=True),
            "memory": psutil.virtual_memory().total,
            "disk_size": psutil.disk_usage(get_default_project_directory()).total,
            "ubridge_tc": None,
            "ubridge_tap": None,
            "ubridge_iol_tap": None,
            "ubridge_bridge_tap": None,
            "vpcs_tap": None,
        }

    async def test_get_on_gns3vm(self, app: FastAPI, compute_client: AsyncClient, on_gns3vm, monkeypatch) -> None:

        async def no_probe():
            return None

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tc_capabilities", no_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json() == {
            "node_types": [
                "cloud",
                "ethernet_hub",
                "ethernet_switch",
                "nat",
                "vpcs",
                "virtualbox",
                "dynamips",
                "frame_relay_switch",
                "atm_switch",
                "qemu",
                "vmware",
                "docker",
                "iou",
            ],
            "version": __version__,
            "platform": sys.platform,
            "cpus": psutil.cpu_count(logical=True),
            "memory": psutil.virtual_memory().total,
            "disk_size": psutil.disk_usage(get_default_project_directory()).total,
            "ubridge_tc": None,
            "ubridge_tap": None,
            "ubridge_iol_tap": None,
            "ubridge_bridge_tap": None,
            "vpcs_tap": None,
        }

    async def test_get_reports_ubridge_tc(self, app: FastAPI, compute_client: AsyncClient, monkeypatch) -> None:

        async def fake_probe():
            return {"netem": "delay,rate", "ebpf": "1", "cbpf": "0", "ebpf_modes": "nth,quota,window,flow"}

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tc_capabilities", fake_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json()["ubridge_tc"] == {
            "netem": ["delay", "rate"],
            "ebpf": True,
            "ebpf_modes": ["nth", "quota", "window", "flow"],
            "cbpf": False,
        }

    async def test_get_reports_ubridge_tap(self, app: FastAPI, compute_client: AsyncClient, monkeypatch) -> None:
        """
        The tap capability is what makes a QEMU node kernel-eligible, so it
        travels with the other compute capabilities.
        """

        async def fake_tap_probe():
            return True

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", fake_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json()["ubridge_tap"] is True

    async def test_get_reports_ubridge_iol_tap(self, app: FastAPI, compute_client: AsyncClient, monkeypatch) -> None:
        """
        The IOL-port TAP capability is what makes an IOU node kernel-eligible,
        so it travels with the other compute capabilities.
        """

        async def fake_iol_tap_probe():
            return True

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", fake_iol_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json()["ubridge_iol_tap"] is True

    async def test_get_reports_ubridge_bridge_tap(self, app: FastAPI, compute_client: AsyncClient, monkeypatch) -> None:
        """
        The swappable-bridge-TAP-leg capability is what makes an IOL runner
        container kernel-eligible, so it travels with the other compute
        capabilities.
        """

        async def fake_bridge_tap_probe():
            return True

        monkeypatch.setattr(
            "gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", fake_bridge_tap_probe
        )
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json()["ubridge_bridge_tap"] is True

    async def test_get_reports_vpcs_tap(self, app: FastAPI, compute_client: AsyncClient, monkeypatch) -> None:
        """
        The VPCS tap-mode capability is what makes a VPCS node
        kernel-eligible, so it travels with the other compute capabilities.
        """

        async def fake_vpcs_tap_probe():
            return True

        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_vpcs_tap", fake_vpcs_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_iol_tap_support", _no_tap_probe)
        monkeypatch.setattr("gns3server.api.routes.compute.capabilities.probe_bridge_tap_support", _no_tap_probe)
        response = await compute_client.get(app.url_path_for("compute:get_capabilities"))
        assert response.status_code == status.HTTP_200_OK
        assert response.json()["vpcs_tap"] is True