# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 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 pytest
import os
import stat
import sys
import uuid
import aiohttp

from tests.utils import asyncio_patch
from unittest.mock import patch, MagicMock, PropertyMock

pytestmark = pytest.mark.skipif(sys.platform.startswith("win"), reason="Not supported on Windows")


@pytest.fixture
def fake_iou_bin(tmpdir):
    """Create a fake IOU image on disk"""

    path = str(tmpdir / "iou.bin")
    with open(path, "w+") as f:
        f.write('\x7fELF\x01\x01\x01')
    os.chmod(path, stat.S_IREAD | stat.S_IEXEC)
    return path


@pytest.fixture
def base_params(tmpdir, fake_iou_bin):
    """Return standard parameters"""
    return {"name": "PC TEST 1", "path": "iou.bin"}


@pytest.fixture
def vm(server, project, base_params):
    response = server.post("/projects/{project_id}/iou/vms".format(project_id=project.id), base_params)
    assert response.status == 201
    return response.json


def startup_config_file(project, vm):
    directory = os.path.join(project.path, "project-files", "iou", vm["vm_id"])
    os.makedirs(directory, exist_ok=True)
    return os.path.join(directory, "startup-config.cfg")


def test_iou_create(server, project, base_params):
    response = server.post("/projects/{project_id}/iou/vms".format(project_id=project.id), base_params)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms"
    assert response.json["name"] == "PC TEST 1"
    assert response.json["project_id"] == project.id
    assert response.json["serial_adapters"] == 2
    assert response.json["ethernet_adapters"] == 2
    assert response.json["ram"] == 256
    assert response.json["nvram"] == 128
    assert response.json["l1_keepalives"] is False


def test_iou_create_with_params(server, project, base_params):
    params = base_params
    params["ram"] = 1024
    params["nvram"] = 512
    params["serial_adapters"] = 4
    params["ethernet_adapters"] = 0
    params["l1_keepalives"] = True
    params["startup_config_content"] = "hostname test"
    params["use_default_iou_values"] = True
    params["iourc_content"] = "test"

    response = server.post("/projects/{project_id}/iou/vms".format(project_id=project.id), params, example=True)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms"
    assert response.json["name"] == "PC TEST 1"
    assert response.json["project_id"] == project.id
    assert response.json["serial_adapters"] == 4
    assert response.json["ethernet_adapters"] == 0
    assert response.json["ram"] == 1024
    assert response.json["nvram"] == 512
    assert response.json["l1_keepalives"] is True
    assert response.json["use_default_iou_values"] is True

    assert "startup-config.cfg" in response.json["startup_config"]
    with open(startup_config_file(project, response.json)) as f:
        assert f.read() == "hostname test"

    assert "iourc" in response.json["iourc_path"]


def test_iou_create_startup_config_already_exist(server, project, base_params):
    """We don't erase a startup-config if already exist at project creation"""

    vm_id = str(uuid.uuid4())
    startup_config_file_path = startup_config_file(project, {'vm_id': vm_id})
    with open(startup_config_file_path, 'w+') as f:
        f.write("echo hello")

    params = base_params
    params["vm_id"] = vm_id
    params["startup_config_content"] = "hostname test"

    response = server.post("/projects/{project_id}/iou/vms".format(project_id=project.id), params, example=True)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms"

    assert "startup-config.cfg" in response.json["startup_config"]
    with open(startup_config_file(project, response.json)) as f:
        assert f.read() == "echo hello"


def test_iou_get(server, project, vm):
    response = server.get("/projects/{project_id}/iou/vms/{vm_id}".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
    assert response.status == 200
    assert response.route == "/projects/{project_id}/iou/vms/{vm_id}"
    assert response.json["name"] == "PC TEST 1"
    assert response.json["project_id"] == project.id
    assert response.json["serial_adapters"] == 2
    assert response.json["ethernet_adapters"] == 2
    assert response.json["ram"] == 256
    assert response.json["nvram"] == 128
    assert response.json["l1_keepalives"] is False


def test_iou_start(server, vm):
    with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.start", return_value=True) as mock:
        response = server.post("/projects/{project_id}/iou/vms/{vm_id}/start".format(project_id=vm["project_id"], vm_id=vm["vm_id"]))
        assert mock.called
        assert response.status == 204


def test_iou_start_with_iourc(server, vm, tmpdir):
    body = {"iourc_content": "test"}

    with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.start", return_value=True) as mock:
        response = server.post("/projects/{project_id}/iou/vms/{vm_id}/start".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), body=body, example=True)
        assert mock.called
        assert response.status == 204

    response = server.get("/projects/{project_id}/iou/vms/{vm_id}".format(project_id=vm["project_id"], vm_id=vm["vm_id"]))
    assert response.status == 200
    with open(response.json["iourc_path"]) as f:
        assert f.read() == "test"


def test_iou_stop(server, vm):
    with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.stop", return_value=True) as mock:
        response = server.post("/projects/{project_id}/iou/vms/{vm_id}/stop".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
        assert mock.called
        assert response.status == 204


def test_iou_reload(server, vm):
    with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.reload", return_value=True) as mock:
        response = server.post("/projects/{project_id}/iou/vms/{vm_id}/reload".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
        assert mock.called
        assert response.status == 204


def test_iou_delete(server, vm):
    with asyncio_patch("gns3server.modules.iou.IOU.delete_vm", return_value=True) as mock:
        response = server.delete("/projects/{project_id}/iou/vms/{vm_id}".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
        assert mock.called
        assert response.status == 204


def test_iou_update(server, vm, tmpdir, free_console_port, project):
    params = {
        "name": "test",
        "console": free_console_port,
        "ram": 512,
        "nvram": 2048,
        "ethernet_adapters": 4,
        "serial_adapters": 0,
        "l1_keepalives": True,
        "startup_config_content": "hostname test",
        "use_default_iou_values": True,
        "iourc_content": "test"
    }
    response = server.put("/projects/{project_id}/iou/vms/{vm_id}".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), params, example=True)
    assert response.status == 200
    assert response.json["name"] == "test"
    assert response.json["console"] == free_console_port
    assert response.json["ethernet_adapters"] == 4
    assert response.json["serial_adapters"] == 0
    assert response.json["ram"] == 512
    assert response.json["nvram"] == 2048
    assert response.json["l1_keepalives"] is True
    assert response.json["use_default_iou_values"] is True
    assert "startup-config.cfg" in response.json["startup_config"]
    with open(startup_config_file(project, response.json)) as f:
        assert f.read() == "hostname test"

    assert "iourc" in response.json["iourc_path"]


def test_iou_nio_create_udp(server, vm):
    response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/1/ports/0/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), {"type": "nio_udp",
                                                                                                                                                    "lport": 4242,
                                                                                                                                                    "rport": 4343,
                                                                                                                                                    "rhost": "127.0.0.1"},
                           example=True)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms/{vm_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio"
    assert response.json["type"] == "nio_udp"


def test_iou_nio_create_ethernet(server, vm, ethernet_device):
    response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/1/ports/0/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), {"type": "nio_generic_ethernet",
                                                                                                                                                    "ethernet_device": ethernet_device,
                                                                                                                                                    },
                           example=True)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms/{vm_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio"
    assert response.json["type"] == "nio_generic_ethernet"
    assert response.json["ethernet_device"] == ethernet_device


def test_iou_nio_create_ethernet_different_port(server, vm, ethernet_device):
    response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/0/ports/3/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), {"type": "nio_generic_ethernet",
                                                                                                                                                    "ethernet_device": ethernet_device,
                                                                                                                                                    },
                           example=False)
    assert response.status == 201
    assert response.route == "/projects/{project_id}/iou/vms/{vm_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio"
    assert response.json["type"] == "nio_generic_ethernet"
    assert response.json["ethernet_device"] == ethernet_device


def test_iou_nio_create_tap(server, vm, ethernet_device):
    with patch("gns3server.modules.base_manager.BaseManager.has_privileged_access", return_value=True):
        response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/1/ports/0/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), {"type": "nio_tap",
                                                                                                                                                        "tap_device": ethernet_device})
        assert response.status == 201
        assert response.route == "/projects/{project_id}/iou/vms/{vm_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio"
        assert response.json["type"] == "nio_tap"


def test_iou_delete_nio(server, vm):
    server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/1/ports/0/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), {"type": "nio_udp",
                                                                                                                                         "lport": 4242,
                                                                                                                                         "rport": 4343,
                                                                                                                                         "rhost": "127.0.0.1"})
    response = server.delete("/projects/{project_id}/iou/vms/{vm_id}/adapters/1/ports/0/nio".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
    assert response.status == 204
    assert response.route == "/projects/{project_id}/iou/vms/{vm_id}/adapters/{adapter_number:\d+}/ports/{port_number:\d+}/nio"


def test_iou_start_capture(server, vm, tmpdir, project):

    with patch("gns3server.modules.iou.iou_vm.IOUVM.is_running", return_value=True) as mock:
        with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.start_capture") as start_capture:

            params = {"capture_file_name": "test.pcap", "data_link_type": "DLT_EN10MB"}
            response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/0/ports/0/start_capture".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), body=params, example=True)

            assert response.status == 200

            assert start_capture.called
            assert "test.pcap" in response.json["pcap_file_path"]


def test_iou_start_capture_not_started(server, vm, tmpdir):

    with patch("gns3server.modules.iou.iou_vm.IOUVM.is_running", return_value=False) as mock:
        with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.start_capture") as start_capture:

            params = {"capture_file_name": "test.pcap", "data_link_type": "DLT_EN10MB"}
            response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/0/ports/0/start_capture".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), body=params)

            assert not start_capture.called
            assert response.status == 409


def test_iou_stop_capture(server, vm, tmpdir, project):

    with patch("gns3server.modules.iou.iou_vm.IOUVM.is_running", return_value=True) as mock:
        with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.stop_capture") as stop_capture:

            response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/0/ports/0/stop_capture".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)

            assert response.status == 204

            assert stop_capture.called


def test_iou_stop_capture_not_started(server, vm, tmpdir):

    with patch("gns3server.modules.iou.iou_vm.IOUVM.is_running", return_value=False) as mock:
        with asyncio_patch("gns3server.modules.iou.iou_vm.IOUVM.stop_capture") as stop_capture:

            response = server.post("/projects/{project_id}/iou/vms/{vm_id}/adapters/0/ports/0/stop_capture".format(project_id=vm["project_id"], vm_id=vm["vm_id"]))

            assert not stop_capture.called
            assert response.status == 409


def test_get_configs_without_configs_file(server, vm):

    response = server.get("/projects/{project_id}/iou/vms/{vm_id}/configs".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
    assert response.status == 200
    assert "startup_config" not in response.json
    assert "private_config" not in response.json


def test_get_configs_with_startup_config_file(server, project, vm):

    path = startup_config_file(project, vm)
    with open(path, "w+") as f:
        f.write("TEST")

    response = server.get("/projects/{project_id}/iou/vms/{vm_id}/configs".format(project_id=vm["project_id"], vm_id=vm["vm_id"]), example=True)
    assert response.status == 200
    assert response.json["startup_config_content"] == "TEST"


def test_vms(server, tmpdir, fake_iou_bin):

    with patch("gns3server.modules.IOU.get_images_directory", return_value=str(tmpdir)):
        response = server.get("/iou/vms", example=True)
    assert response.status == 200
    assert response.json == [{"filename": "iou.bin", "path": "iou.bin"}]


def test_upload_vm(server, tmpdir):
    with patch("gns3server.modules.IOU.get_images_directory", return_value=str(tmpdir),):
        response = server.post("/iou/vms/test2", body="TEST", raw=True)
        assert response.status == 204

    with open(str(tmpdir / "test2")) as f:
        assert f.read() == "TEST"

    with open(str(tmpdir / "test2.md5sum")) as f:
        checksum = f.read()
        assert checksum == "033bd94b1168d7e4f0d644c3c95e35bf"


def test_upload_vm_permission_denied(server, tmpdir):
    with open(str(tmpdir / "test2"), "w+") as f:
        f.write("")
    os.chmod(str(tmpdir / "test2"), 0)

    with patch("gns3server.modules.IOU.get_images_directory", return_value=str(tmpdir),):
        response = server.post("/iou/vms/test2", body="TEST", raw=True)
        assert response.status == 409
